![Clemens Ladisch](/assets/img/avatar_default.png)
Memalloc module,PCM Midlevel,Timer Midlevel,GUS Library,AC97 Codec ALI5451 driver,RME9652 driver Make some functions/variables that are used in only one file static. Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
2631 lines
68 KiB
C
2631 lines
68 KiB
C
/*
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* Digital Audio (PCM) abstract layer
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* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
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* Abramo Bagnara <abramo@alsa-project.org>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/driver.h>
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#include <linux/slab.h>
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#include <linux/time.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/info.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/timer.h>
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/*
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* fill ring buffer with silence
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* runtime->silence_start: starting pointer to silence area
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* runtime->silence_filled: size filled with silence
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* runtime->silence_threshold: threshold from application
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* runtime->silence_size: maximal size from application
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*
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* when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately
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*/
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void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t new_hw_ptr)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_pcm_uframes_t frames, ofs, transfer;
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if (runtime->silence_size < runtime->boundary) {
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snd_pcm_sframes_t noise_dist, n;
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if (runtime->silence_start != runtime->control->appl_ptr) {
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n = runtime->control->appl_ptr - runtime->silence_start;
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if (n < 0)
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n += runtime->boundary;
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if ((snd_pcm_uframes_t)n < runtime->silence_filled)
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runtime->silence_filled -= n;
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else
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runtime->silence_filled = 0;
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runtime->silence_start = runtime->control->appl_ptr;
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}
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if (runtime->silence_filled == runtime->buffer_size)
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return;
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snd_assert(runtime->silence_filled <= runtime->buffer_size, return);
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noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled;
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if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold)
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return;
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frames = runtime->silence_threshold - noise_dist;
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if (frames > runtime->silence_size)
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frames = runtime->silence_size;
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} else {
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if (new_hw_ptr == ULONG_MAX) { /* initialization */
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snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime);
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runtime->silence_filled = avail > 0 ? avail : 0;
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runtime->silence_start = (runtime->status->hw_ptr +
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runtime->silence_filled) %
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runtime->boundary;
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} else {
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ofs = runtime->status->hw_ptr;
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frames = new_hw_ptr - ofs;
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if ((snd_pcm_sframes_t)frames < 0)
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frames += runtime->boundary;
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runtime->silence_filled -= frames;
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if ((snd_pcm_sframes_t)runtime->silence_filled < 0) {
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runtime->silence_filled = 0;
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runtime->silence_start = (ofs + frames) - runtime->buffer_size;
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} else {
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runtime->silence_start = ofs - runtime->silence_filled;
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}
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if ((snd_pcm_sframes_t)runtime->silence_start < 0)
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runtime->silence_start += runtime->boundary;
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}
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frames = runtime->buffer_size - runtime->silence_filled;
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}
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snd_assert(frames <= runtime->buffer_size, return);
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if (frames == 0)
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return;
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ofs = (runtime->silence_start + runtime->silence_filled) % runtime->buffer_size;
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while (frames > 0) {
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transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames;
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if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
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runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) {
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if (substream->ops->silence) {
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int err;
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err = substream->ops->silence(substream, -1, ofs, transfer);
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snd_assert(err >= 0, );
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} else {
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char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs);
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snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels);
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}
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} else {
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unsigned int c;
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unsigned int channels = runtime->channels;
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if (substream->ops->silence) {
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for (c = 0; c < channels; ++c) {
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int err;
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err = substream->ops->silence(substream, c, ofs, transfer);
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snd_assert(err >= 0, );
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}
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} else {
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size_t dma_csize = runtime->dma_bytes / channels;
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for (c = 0; c < channels; ++c) {
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char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs);
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snd_pcm_format_set_silence(runtime->format, hwbuf, transfer);
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}
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}
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}
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runtime->silence_filled += transfer;
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frames -= transfer;
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ofs = 0;
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}
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}
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static void xrun(snd_pcm_substream_t *substream)
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{
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snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
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#ifdef CONFIG_SND_DEBUG
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if (substream->pstr->xrun_debug) {
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snd_printd(KERN_DEBUG "XRUN: pcmC%dD%d%c\n",
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substream->pcm->card->number,
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substream->pcm->device,
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substream->stream ? 'c' : 'p');
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if (substream->pstr->xrun_debug > 1)
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dump_stack();
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}
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#endif
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}
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static inline snd_pcm_uframes_t snd_pcm_update_hw_ptr_pos(snd_pcm_substream_t *substream,
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snd_pcm_runtime_t *runtime)
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{
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snd_pcm_uframes_t pos;
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pos = substream->ops->pointer(substream);
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if (pos == SNDRV_PCM_POS_XRUN)
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return pos; /* XRUN */
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if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
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snd_timestamp_now((snd_timestamp_t*)&runtime->status->tstamp, runtime->tstamp_timespec);
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#ifdef CONFIG_SND_DEBUG
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if (pos >= runtime->buffer_size) {
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snd_printk(KERN_ERR "BUG: stream = %i, pos = 0x%lx, buffer size = 0x%lx, period size = 0x%lx\n", substream->stream, pos, runtime->buffer_size, runtime->period_size);
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} else
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#endif
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snd_runtime_check(pos < runtime->buffer_size, return 0);
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pos -= pos % runtime->min_align;
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return pos;
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}
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static inline int snd_pcm_update_hw_ptr_post(snd_pcm_substream_t *substream,
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snd_pcm_runtime_t *runtime)
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{
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snd_pcm_uframes_t avail;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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avail = snd_pcm_playback_avail(runtime);
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else
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avail = snd_pcm_capture_avail(runtime);
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if (avail > runtime->avail_max)
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runtime->avail_max = avail;
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if (avail >= runtime->stop_threshold) {
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if (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING)
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snd_pcm_drain_done(substream);
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else
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xrun(substream);
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return -EPIPE;
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}
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if (avail >= runtime->control->avail_min)
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wake_up(&runtime->sleep);
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return 0;
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}
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static inline int snd_pcm_update_hw_ptr_interrupt(snd_pcm_substream_t *substream)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_pcm_uframes_t pos;
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snd_pcm_uframes_t new_hw_ptr, hw_ptr_interrupt;
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snd_pcm_sframes_t delta;
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pos = snd_pcm_update_hw_ptr_pos(substream, runtime);
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if (pos == SNDRV_PCM_POS_XRUN) {
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xrun(substream);
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return -EPIPE;
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}
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if (runtime->period_size == runtime->buffer_size)
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goto __next_buf;
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new_hw_ptr = runtime->hw_ptr_base + pos;
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hw_ptr_interrupt = runtime->hw_ptr_interrupt + runtime->period_size;
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delta = hw_ptr_interrupt - new_hw_ptr;
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if (delta > 0) {
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if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) {
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#ifdef CONFIG_SND_DEBUG
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if (runtime->periods > 1 && substream->pstr->xrun_debug) {
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snd_printd(KERN_ERR "Unexpected hw_pointer value [1] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2);
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if (substream->pstr->xrun_debug > 1)
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dump_stack();
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}
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#endif
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return 0;
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}
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__next_buf:
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runtime->hw_ptr_base += runtime->buffer_size;
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if (runtime->hw_ptr_base == runtime->boundary)
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runtime->hw_ptr_base = 0;
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new_hw_ptr = runtime->hw_ptr_base + pos;
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}
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
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runtime->silence_size > 0)
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snd_pcm_playback_silence(substream, new_hw_ptr);
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runtime->status->hw_ptr = new_hw_ptr;
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runtime->hw_ptr_interrupt = new_hw_ptr - new_hw_ptr % runtime->period_size;
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return snd_pcm_update_hw_ptr_post(substream, runtime);
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}
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/* CAUTION: call it with irq disabled */
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int snd_pcm_update_hw_ptr(snd_pcm_substream_t *substream)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_pcm_uframes_t pos;
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snd_pcm_uframes_t old_hw_ptr, new_hw_ptr;
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snd_pcm_sframes_t delta;
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old_hw_ptr = runtime->status->hw_ptr;
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pos = snd_pcm_update_hw_ptr_pos(substream, runtime);
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if (pos == SNDRV_PCM_POS_XRUN) {
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xrun(substream);
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return -EPIPE;
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}
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new_hw_ptr = runtime->hw_ptr_base + pos;
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delta = old_hw_ptr - new_hw_ptr;
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if (delta > 0) {
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if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) {
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#ifdef CONFIG_SND_DEBUG
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if (runtime->periods > 2 && substream->pstr->xrun_debug) {
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snd_printd(KERN_ERR "Unexpected hw_pointer value [2] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2);
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if (substream->pstr->xrun_debug > 1)
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dump_stack();
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}
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#endif
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return 0;
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}
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runtime->hw_ptr_base += runtime->buffer_size;
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if (runtime->hw_ptr_base == runtime->boundary)
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runtime->hw_ptr_base = 0;
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new_hw_ptr = runtime->hw_ptr_base + pos;
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}
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
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runtime->silence_size > 0)
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snd_pcm_playback_silence(substream, new_hw_ptr);
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runtime->status->hw_ptr = new_hw_ptr;
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return snd_pcm_update_hw_ptr_post(substream, runtime);
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}
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/**
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* snd_pcm_set_ops - set the PCM operators
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* @pcm: the pcm instance
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* @direction: stream direction, SNDRV_PCM_STREAM_XXX
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* @ops: the operator table
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*
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* Sets the given PCM operators to the pcm instance.
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*/
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void snd_pcm_set_ops(snd_pcm_t *pcm, int direction, snd_pcm_ops_t *ops)
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{
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snd_pcm_str_t *stream = &pcm->streams[direction];
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snd_pcm_substream_t *substream;
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for (substream = stream->substream; substream != NULL; substream = substream->next)
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substream->ops = ops;
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}
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/**
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* snd_pcm_sync - set the PCM sync id
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* @substream: the pcm substream
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*
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* Sets the PCM sync identifier for the card.
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*/
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void snd_pcm_set_sync(snd_pcm_substream_t * substream)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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runtime->sync.id32[0] = substream->pcm->card->number;
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runtime->sync.id32[1] = -1;
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runtime->sync.id32[2] = -1;
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runtime->sync.id32[3] = -1;
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}
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/*
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* Standard ioctl routine
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*/
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/* Code taken from alsa-lib */
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#define assert(a) snd_assert((a), return -EINVAL)
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static inline unsigned int div32(unsigned int a, unsigned int b,
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unsigned int *r)
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{
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if (b == 0) {
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*r = 0;
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return UINT_MAX;
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}
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*r = a % b;
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return a / b;
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}
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static inline unsigned int div_down(unsigned int a, unsigned int b)
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{
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if (b == 0)
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return UINT_MAX;
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return a / b;
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}
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static inline unsigned int div_up(unsigned int a, unsigned int b)
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{
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unsigned int r;
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unsigned int q;
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if (b == 0)
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return UINT_MAX;
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q = div32(a, b, &r);
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if (r)
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++q;
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return q;
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}
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static inline unsigned int mul(unsigned int a, unsigned int b)
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{
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if (a == 0)
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return 0;
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if (div_down(UINT_MAX, a) < b)
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return UINT_MAX;
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return a * b;
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}
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static inline unsigned int muldiv32(unsigned int a, unsigned int b,
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unsigned int c, unsigned int *r)
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{
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u_int64_t n = (u_int64_t) a * b;
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if (c == 0) {
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snd_assert(n > 0, );
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*r = 0;
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return UINT_MAX;
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}
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div64_32(&n, c, r);
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if (n >= UINT_MAX) {
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*r = 0;
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return UINT_MAX;
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}
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return n;
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}
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static int snd_interval_refine_min(snd_interval_t *i, unsigned int min, int openmin)
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{
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int changed = 0;
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assert(!snd_interval_empty(i));
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if (i->min < min) {
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i->min = min;
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i->openmin = openmin;
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changed = 1;
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} else if (i->min == min && !i->openmin && openmin) {
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i->openmin = 1;
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changed = 1;
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}
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if (i->integer) {
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if (i->openmin) {
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i->min++;
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i->openmin = 0;
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}
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}
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if (snd_interval_checkempty(i)) {
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snd_interval_none(i);
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return -EINVAL;
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}
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return changed;
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}
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static int snd_interval_refine_max(snd_interval_t *i, unsigned int max, int openmax)
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{
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int changed = 0;
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assert(!snd_interval_empty(i));
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if (i->max > max) {
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i->max = max;
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i->openmax = openmax;
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changed = 1;
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} else if (i->max == max && !i->openmax && openmax) {
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i->openmax = 1;
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changed = 1;
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}
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if (i->integer) {
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if (i->openmax) {
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i->max--;
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i->openmax = 0;
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}
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}
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if (snd_interval_checkempty(i)) {
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snd_interval_none(i);
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return -EINVAL;
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}
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return changed;
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}
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/**
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* snd_interval_refine - refine the interval value of configurator
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* @i: the interval value to refine
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* @v: the interval value to refer to
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*
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* Refines the interval value with the reference value.
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* The interval is changed to the range satisfying both intervals.
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* The interval status (min, max, integer, etc.) are evaluated.
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*
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* Returns non-zero if the value is changed, zero if not changed.
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*/
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int snd_interval_refine(snd_interval_t *i, const snd_interval_t *v)
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{
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int changed = 0;
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assert(!snd_interval_empty(i));
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if (i->min < v->min) {
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i->min = v->min;
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i->openmin = v->openmin;
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changed = 1;
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} else if (i->min == v->min && !i->openmin && v->openmin) {
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i->openmin = 1;
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changed = 1;
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}
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if (i->max > v->max) {
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i->max = v->max;
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i->openmax = v->openmax;
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changed = 1;
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} else if (i->max == v->max && !i->openmax && v->openmax) {
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i->openmax = 1;
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changed = 1;
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}
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if (!i->integer && v->integer) {
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i->integer = 1;
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changed = 1;
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}
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if (i->integer) {
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if (i->openmin) {
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i->min++;
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i->openmin = 0;
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}
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if (i->openmax) {
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i->max--;
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i->openmax = 0;
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}
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} else if (!i->openmin && !i->openmax && i->min == i->max)
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i->integer = 1;
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if (snd_interval_checkempty(i)) {
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snd_interval_none(i);
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return -EINVAL;
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}
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return changed;
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}
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static int snd_interval_refine_first(snd_interval_t *i)
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{
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assert(!snd_interval_empty(i));
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if (snd_interval_single(i))
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return 0;
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i->max = i->min;
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|
i->openmax = i->openmin;
|
|
if (i->openmax)
|
|
i->max++;
|
|
return 1;
|
|
}
|
|
|
|
static int snd_interval_refine_last(snd_interval_t *i)
|
|
{
|
|
assert(!snd_interval_empty(i));
|
|
if (snd_interval_single(i))
|
|
return 0;
|
|
i->min = i->max;
|
|
i->openmin = i->openmax;
|
|
if (i->openmin)
|
|
i->min--;
|
|
return 1;
|
|
}
|
|
|
|
static int snd_interval_refine_set(snd_interval_t *i, unsigned int val)
|
|
{
|
|
snd_interval_t t;
|
|
t.empty = 0;
|
|
t.min = t.max = val;
|
|
t.openmin = t.openmax = 0;
|
|
t.integer = 1;
|
|
return snd_interval_refine(i, &t);
|
|
}
|
|
|
|
void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c)
|
|
{
|
|
if (a->empty || b->empty) {
|
|
snd_interval_none(c);
|
|
return;
|
|
}
|
|
c->empty = 0;
|
|
c->min = mul(a->min, b->min);
|
|
c->openmin = (a->openmin || b->openmin);
|
|
c->max = mul(a->max, b->max);
|
|
c->openmax = (a->openmax || b->openmax);
|
|
c->integer = (a->integer && b->integer);
|
|
}
|
|
|
|
/**
|
|
* snd_interval_div - refine the interval value with division
|
|
*
|
|
* c = a / b
|
|
*
|
|
* Returns non-zero if the value is changed, zero if not changed.
|
|
*/
|
|
void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c)
|
|
{
|
|
unsigned int r;
|
|
if (a->empty || b->empty) {
|
|
snd_interval_none(c);
|
|
return;
|
|
}
|
|
c->empty = 0;
|
|
c->min = div32(a->min, b->max, &r);
|
|
c->openmin = (r || a->openmin || b->openmax);
|
|
if (b->min > 0) {
|
|
c->max = div32(a->max, b->min, &r);
|
|
if (r) {
|
|
c->max++;
|
|
c->openmax = 1;
|
|
} else
|
|
c->openmax = (a->openmax || b->openmin);
|
|
} else {
|
|
c->max = UINT_MAX;
|
|
c->openmax = 0;
|
|
}
|
|
c->integer = 0;
|
|
}
|
|
|
|
/**
|
|
* snd_interval_muldivk - refine the interval value
|
|
*
|
|
* c = a * b / k
|
|
*
|
|
* Returns non-zero if the value is changed, zero if not changed.
|
|
*/
|
|
void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b,
|
|
unsigned int k, snd_interval_t *c)
|
|
{
|
|
unsigned int r;
|
|
if (a->empty || b->empty) {
|
|
snd_interval_none(c);
|
|
return;
|
|
}
|
|
c->empty = 0;
|
|
c->min = muldiv32(a->min, b->min, k, &r);
|
|
c->openmin = (r || a->openmin || b->openmin);
|
|
c->max = muldiv32(a->max, b->max, k, &r);
|
|
if (r) {
|
|
c->max++;
|
|
c->openmax = 1;
|
|
} else
|
|
c->openmax = (a->openmax || b->openmax);
|
|
c->integer = 0;
|
|
}
|
|
|
|
/**
|
|
* snd_interval_mulkdiv - refine the interval value
|
|
*
|
|
* c = a * k / b
|
|
*
|
|
* Returns non-zero if the value is changed, zero if not changed.
|
|
*/
|
|
void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k,
|
|
const snd_interval_t *b, snd_interval_t *c)
|
|
{
|
|
unsigned int r;
|
|
if (a->empty || b->empty) {
|
|
snd_interval_none(c);
|
|
return;
|
|
}
|
|
c->empty = 0;
|
|
c->min = muldiv32(a->min, k, b->max, &r);
|
|
c->openmin = (r || a->openmin || b->openmax);
|
|
if (b->min > 0) {
|
|
c->max = muldiv32(a->max, k, b->min, &r);
|
|
if (r) {
|
|
c->max++;
|
|
c->openmax = 1;
|
|
} else
|
|
c->openmax = (a->openmax || b->openmin);
|
|
} else {
|
|
c->max = UINT_MAX;
|
|
c->openmax = 0;
|
|
}
|
|
c->integer = 0;
|
|
}
|
|
|
|
#undef assert
|
|
/* ---- */
|
|
|
|
|
|
/**
|
|
* snd_interval_ratnum - refine the interval value
|
|
*
|
|
* Returns non-zero if the value is changed, zero if not changed.
|
|
*/
|
|
int snd_interval_ratnum(snd_interval_t *i,
|
|
unsigned int rats_count, ratnum_t *rats,
|
|
unsigned int *nump, unsigned int *denp)
|
|
{
|
|
unsigned int best_num, best_diff, best_den;
|
|
unsigned int k;
|
|
snd_interval_t t;
|
|
int err;
|
|
|
|
best_num = best_den = best_diff = 0;
|
|
for (k = 0; k < rats_count; ++k) {
|
|
unsigned int num = rats[k].num;
|
|
unsigned int den;
|
|
unsigned int q = i->min;
|
|
int diff;
|
|
if (q == 0)
|
|
q = 1;
|
|
den = div_down(num, q);
|
|
if (den < rats[k].den_min)
|
|
continue;
|
|
if (den > rats[k].den_max)
|
|
den = rats[k].den_max;
|
|
else {
|
|
unsigned int r;
|
|
r = (den - rats[k].den_min) % rats[k].den_step;
|
|
if (r != 0)
|
|
den -= r;
|
|
}
|
|
diff = num - q * den;
|
|
if (best_num == 0 ||
|
|
diff * best_den < best_diff * den) {
|
|
best_diff = diff;
|
|
best_den = den;
|
|
best_num = num;
|
|
}
|
|
}
|
|
if (best_den == 0) {
|
|
i->empty = 1;
|
|
return -EINVAL;
|
|
}
|
|
t.min = div_down(best_num, best_den);
|
|
t.openmin = !!(best_num % best_den);
|
|
|
|
best_num = best_den = best_diff = 0;
|
|
for (k = 0; k < rats_count; ++k) {
|
|
unsigned int num = rats[k].num;
|
|
unsigned int den;
|
|
unsigned int q = i->max;
|
|
int diff;
|
|
if (q == 0) {
|
|
i->empty = 1;
|
|
return -EINVAL;
|
|
}
|
|
den = div_up(num, q);
|
|
if (den > rats[k].den_max)
|
|
continue;
|
|
if (den < rats[k].den_min)
|
|
den = rats[k].den_min;
|
|
else {
|
|
unsigned int r;
|
|
r = (den - rats[k].den_min) % rats[k].den_step;
|
|
if (r != 0)
|
|
den += rats[k].den_step - r;
|
|
}
|
|
diff = q * den - num;
|
|
if (best_num == 0 ||
|
|
diff * best_den < best_diff * den) {
|
|
best_diff = diff;
|
|
best_den = den;
|
|
best_num = num;
|
|
}
|
|
}
|
|
if (best_den == 0) {
|
|
i->empty = 1;
|
|
return -EINVAL;
|
|
}
|
|
t.max = div_up(best_num, best_den);
|
|
t.openmax = !!(best_num % best_den);
|
|
t.integer = 0;
|
|
err = snd_interval_refine(i, &t);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (snd_interval_single(i)) {
|
|
if (nump)
|
|
*nump = best_num;
|
|
if (denp)
|
|
*denp = best_den;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* snd_interval_ratden - refine the interval value
|
|
*
|
|
* Returns non-zero if the value is changed, zero if not changed.
|
|
*/
|
|
static int snd_interval_ratden(snd_interval_t *i,
|
|
unsigned int rats_count, ratden_t *rats,
|
|
unsigned int *nump, unsigned int *denp)
|
|
{
|
|
unsigned int best_num, best_diff, best_den;
|
|
unsigned int k;
|
|
snd_interval_t t;
|
|
int err;
|
|
|
|
best_num = best_den = best_diff = 0;
|
|
for (k = 0; k < rats_count; ++k) {
|
|
unsigned int num;
|
|
unsigned int den = rats[k].den;
|
|
unsigned int q = i->min;
|
|
int diff;
|
|
num = mul(q, den);
|
|
if (num > rats[k].num_max)
|
|
continue;
|
|
if (num < rats[k].num_min)
|
|
num = rats[k].num_max;
|
|
else {
|
|
unsigned int r;
|
|
r = (num - rats[k].num_min) % rats[k].num_step;
|
|
if (r != 0)
|
|
num += rats[k].num_step - r;
|
|
}
|
|
diff = num - q * den;
|
|
if (best_num == 0 ||
|
|
diff * best_den < best_diff * den) {
|
|
best_diff = diff;
|
|
best_den = den;
|
|
best_num = num;
|
|
}
|
|
}
|
|
if (best_den == 0) {
|
|
i->empty = 1;
|
|
return -EINVAL;
|
|
}
|
|
t.min = div_down(best_num, best_den);
|
|
t.openmin = !!(best_num % best_den);
|
|
|
|
best_num = best_den = best_diff = 0;
|
|
for (k = 0; k < rats_count; ++k) {
|
|
unsigned int num;
|
|
unsigned int den = rats[k].den;
|
|
unsigned int q = i->max;
|
|
int diff;
|
|
num = mul(q, den);
|
|
if (num < rats[k].num_min)
|
|
continue;
|
|
if (num > rats[k].num_max)
|
|
num = rats[k].num_max;
|
|
else {
|
|
unsigned int r;
|
|
r = (num - rats[k].num_min) % rats[k].num_step;
|
|
if (r != 0)
|
|
num -= r;
|
|
}
|
|
diff = q * den - num;
|
|
if (best_num == 0 ||
|
|
diff * best_den < best_diff * den) {
|
|
best_diff = diff;
|
|
best_den = den;
|
|
best_num = num;
|
|
}
|
|
}
|
|
if (best_den == 0) {
|
|
i->empty = 1;
|
|
return -EINVAL;
|
|
}
|
|
t.max = div_up(best_num, best_den);
|
|
t.openmax = !!(best_num % best_den);
|
|
t.integer = 0;
|
|
err = snd_interval_refine(i, &t);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (snd_interval_single(i)) {
|
|
if (nump)
|
|
*nump = best_num;
|
|
if (denp)
|
|
*denp = best_den;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* snd_interval_list - refine the interval value from the list
|
|
* @i: the interval value to refine
|
|
* @count: the number of elements in the list
|
|
* @list: the value list
|
|
* @mask: the bit-mask to evaluate
|
|
*
|
|
* Refines the interval value from the list.
|
|
* When mask is non-zero, only the elements corresponding to bit 1 are
|
|
* evaluated.
|
|
*
|
|
* Returns non-zero if the value is changed, zero if not changed.
|
|
*/
|
|
int snd_interval_list(snd_interval_t *i, unsigned int count, unsigned int *list, unsigned int mask)
|
|
{
|
|
unsigned int k;
|
|
int changed = 0;
|
|
for (k = 0; k < count; k++) {
|
|
if (mask && !(mask & (1 << k)))
|
|
continue;
|
|
if (i->min == list[k] && !i->openmin)
|
|
goto _l1;
|
|
if (i->min < list[k]) {
|
|
i->min = list[k];
|
|
i->openmin = 0;
|
|
changed = 1;
|
|
goto _l1;
|
|
}
|
|
}
|
|
i->empty = 1;
|
|
return -EINVAL;
|
|
_l1:
|
|
for (k = count; k-- > 0;) {
|
|
if (mask && !(mask & (1 << k)))
|
|
continue;
|
|
if (i->max == list[k] && !i->openmax)
|
|
goto _l2;
|
|
if (i->max > list[k]) {
|
|
i->max = list[k];
|
|
i->openmax = 0;
|
|
changed = 1;
|
|
goto _l2;
|
|
}
|
|
}
|
|
i->empty = 1;
|
|
return -EINVAL;
|
|
_l2:
|
|
if (snd_interval_checkempty(i)) {
|
|
i->empty = 1;
|
|
return -EINVAL;
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
static int snd_interval_step(snd_interval_t *i, unsigned int min, unsigned int step)
|
|
{
|
|
unsigned int n;
|
|
int changed = 0;
|
|
n = (i->min - min) % step;
|
|
if (n != 0 || i->openmin) {
|
|
i->min += step - n;
|
|
changed = 1;
|
|
}
|
|
n = (i->max - min) % step;
|
|
if (n != 0 || i->openmax) {
|
|
i->max -= n;
|
|
changed = 1;
|
|
}
|
|
if (snd_interval_checkempty(i)) {
|
|
i->empty = 1;
|
|
return -EINVAL;
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
/* Info constraints helpers */
|
|
|
|
/**
|
|
* snd_pcm_hw_rule_add - add the hw-constraint rule
|
|
* @runtime: the pcm runtime instance
|
|
* @cond: condition bits
|
|
* @var: the variable to evaluate
|
|
* @func: the evaluation function
|
|
* @private: the private data pointer passed to function
|
|
* @dep: the dependent variables
|
|
*
|
|
* Returns zero if successful, or a negative error code on failure.
|
|
*/
|
|
int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime, unsigned int cond,
|
|
int var,
|
|
snd_pcm_hw_rule_func_t func, void *private,
|
|
int dep, ...)
|
|
{
|
|
snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints;
|
|
snd_pcm_hw_rule_t *c;
|
|
unsigned int k;
|
|
va_list args;
|
|
va_start(args, dep);
|
|
if (constrs->rules_num >= constrs->rules_all) {
|
|
snd_pcm_hw_rule_t *new;
|
|
unsigned int new_rules = constrs->rules_all + 16;
|
|
new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL);
|
|
if (!new)
|
|
return -ENOMEM;
|
|
if (constrs->rules) {
|
|
memcpy(new, constrs->rules,
|
|
constrs->rules_num * sizeof(*c));
|
|
kfree(constrs->rules);
|
|
}
|
|
constrs->rules = new;
|
|
constrs->rules_all = new_rules;
|
|
}
|
|
c = &constrs->rules[constrs->rules_num];
|
|
c->cond = cond;
|
|
c->func = func;
|
|
c->var = var;
|
|
c->private = private;
|
|
k = 0;
|
|
while (1) {
|
|
snd_assert(k < ARRAY_SIZE(c->deps), return -EINVAL);
|
|
c->deps[k++] = dep;
|
|
if (dep < 0)
|
|
break;
|
|
dep = va_arg(args, int);
|
|
}
|
|
constrs->rules_num++;
|
|
va_end(args);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_constraint_mask
|
|
*/
|
|
int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
|
|
u_int32_t mask)
|
|
{
|
|
snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints;
|
|
snd_mask_t *maskp = constrs_mask(constrs, var);
|
|
*maskp->bits &= mask;
|
|
memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */
|
|
if (*maskp->bits == 0)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_constraint_mask64
|
|
*/
|
|
int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
|
|
u_int64_t mask)
|
|
{
|
|
snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints;
|
|
snd_mask_t *maskp = constrs_mask(constrs, var);
|
|
maskp->bits[0] &= (u_int32_t)mask;
|
|
maskp->bits[1] &= (u_int32_t)(mask >> 32);
|
|
memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */
|
|
if (! maskp->bits[0] && ! maskp->bits[1])
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_constraint_integer
|
|
*/
|
|
int snd_pcm_hw_constraint_integer(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var)
|
|
{
|
|
snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints;
|
|
return snd_interval_setinteger(constrs_interval(constrs, var));
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_constraint_minmax
|
|
*/
|
|
int snd_pcm_hw_constraint_minmax(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
|
|
unsigned int min, unsigned int max)
|
|
{
|
|
snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints;
|
|
snd_interval_t t;
|
|
t.min = min;
|
|
t.max = max;
|
|
t.openmin = t.openmax = 0;
|
|
t.integer = 0;
|
|
return snd_interval_refine(constrs_interval(constrs, var), &t);
|
|
}
|
|
|
|
static int snd_pcm_hw_rule_list(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_rule_t *rule)
|
|
{
|
|
snd_pcm_hw_constraint_list_t *list = rule->private;
|
|
return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask);
|
|
}
|
|
|
|
|
|
/**
|
|
* snd_pcm_hw_constraint_list
|
|
*/
|
|
int snd_pcm_hw_constraint_list(snd_pcm_runtime_t *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var,
|
|
snd_pcm_hw_constraint_list_t *l)
|
|
{
|
|
return snd_pcm_hw_rule_add(runtime, cond, var,
|
|
snd_pcm_hw_rule_list, l,
|
|
var, -1);
|
|
}
|
|
|
|
static int snd_pcm_hw_rule_ratnums(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_rule_t *rule)
|
|
{
|
|
snd_pcm_hw_constraint_ratnums_t *r = rule->private;
|
|
unsigned int num = 0, den = 0;
|
|
int err;
|
|
err = snd_interval_ratnum(hw_param_interval(params, rule->var),
|
|
r->nrats, r->rats, &num, &den);
|
|
if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) {
|
|
params->rate_num = num;
|
|
params->rate_den = den;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_constraint_ratnums
|
|
*/
|
|
int snd_pcm_hw_constraint_ratnums(snd_pcm_runtime_t *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var,
|
|
snd_pcm_hw_constraint_ratnums_t *r)
|
|
{
|
|
return snd_pcm_hw_rule_add(runtime, cond, var,
|
|
snd_pcm_hw_rule_ratnums, r,
|
|
var, -1);
|
|
}
|
|
|
|
static int snd_pcm_hw_rule_ratdens(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_rule_t *rule)
|
|
{
|
|
snd_pcm_hw_constraint_ratdens_t *r = rule->private;
|
|
unsigned int num = 0, den = 0;
|
|
int err = snd_interval_ratden(hw_param_interval(params, rule->var),
|
|
r->nrats, r->rats, &num, &den);
|
|
if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) {
|
|
params->rate_num = num;
|
|
params->rate_den = den;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_constraint_ratdens
|
|
*/
|
|
int snd_pcm_hw_constraint_ratdens(snd_pcm_runtime_t *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var,
|
|
snd_pcm_hw_constraint_ratdens_t *r)
|
|
{
|
|
return snd_pcm_hw_rule_add(runtime, cond, var,
|
|
snd_pcm_hw_rule_ratdens, r,
|
|
var, -1);
|
|
}
|
|
|
|
static int snd_pcm_hw_rule_msbits(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_rule_t *rule)
|
|
{
|
|
unsigned int l = (unsigned long) rule->private;
|
|
int width = l & 0xffff;
|
|
unsigned int msbits = l >> 16;
|
|
snd_interval_t *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
|
|
if (snd_interval_single(i) && snd_interval_value(i) == width)
|
|
params->msbits = msbits;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_constraint_msbits
|
|
*/
|
|
int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime,
|
|
unsigned int cond,
|
|
unsigned int width,
|
|
unsigned int msbits)
|
|
{
|
|
unsigned long l = (msbits << 16) | width;
|
|
return snd_pcm_hw_rule_add(runtime, cond, -1,
|
|
snd_pcm_hw_rule_msbits,
|
|
(void*) l,
|
|
SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
|
|
}
|
|
|
|
static int snd_pcm_hw_rule_step(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_rule_t *rule)
|
|
{
|
|
unsigned long step = (unsigned long) rule->private;
|
|
return snd_interval_step(hw_param_interval(params, rule->var), 0, step);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_constraint_step
|
|
*/
|
|
int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var,
|
|
unsigned long step)
|
|
{
|
|
return snd_pcm_hw_rule_add(runtime, cond, var,
|
|
snd_pcm_hw_rule_step, (void *) step,
|
|
var, -1);
|
|
}
|
|
|
|
static int snd_pcm_hw_rule_pow2(snd_pcm_hw_params_t *params, snd_pcm_hw_rule_t *rule)
|
|
{
|
|
static int pow2_sizes[] = {
|
|
1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7,
|
|
1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15,
|
|
1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23,
|
|
1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30
|
|
};
|
|
return snd_interval_list(hw_param_interval(params, rule->var),
|
|
ARRAY_SIZE(pow2_sizes), pow2_sizes, 0);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_constraint_pow2
|
|
*/
|
|
int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
return snd_pcm_hw_rule_add(runtime, cond, var,
|
|
snd_pcm_hw_rule_pow2, NULL,
|
|
var, -1);
|
|
}
|
|
|
|
/* To use the same code we have in alsa-lib */
|
|
#define snd_pcm_t snd_pcm_substream_t
|
|
#define assert(i) snd_assert((i), return -EINVAL)
|
|
#ifndef INT_MIN
|
|
#define INT_MIN ((int)((unsigned int)INT_MAX+1))
|
|
#endif
|
|
|
|
static void _snd_pcm_hw_param_any(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
if (hw_is_mask(var)) {
|
|
snd_mask_any(hw_param_mask(params, var));
|
|
params->cmask |= 1 << var;
|
|
params->rmask |= 1 << var;
|
|
return;
|
|
}
|
|
if (hw_is_interval(var)) {
|
|
snd_interval_any(hw_param_interval(params, var));
|
|
params->cmask |= 1 << var;
|
|
params->rmask |= 1 << var;
|
|
return;
|
|
}
|
|
snd_BUG();
|
|
}
|
|
|
|
#if 0
|
|
/**
|
|
* snd_pcm_hw_param_any
|
|
*/
|
|
int snd_pcm_hw_param_any(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
_snd_pcm_hw_param_any(params, var);
|
|
return snd_pcm_hw_refine(pcm, params);
|
|
}
|
|
#endif /* 0 */
|
|
|
|
void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params)
|
|
{
|
|
unsigned int k;
|
|
memset(params, 0, sizeof(*params));
|
|
for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++)
|
|
_snd_pcm_hw_param_any(params, k);
|
|
for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
|
|
_snd_pcm_hw_param_any(params, k);
|
|
params->info = ~0U;
|
|
}
|
|
|
|
#if 0
|
|
/**
|
|
* snd_pcm_hw_params_any
|
|
*
|
|
* Fill PARAMS with full configuration space boundaries
|
|
*/
|
|
int snd_pcm_hw_params_any(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
|
|
{
|
|
_snd_pcm_hw_params_any(params);
|
|
return snd_pcm_hw_refine(pcm, params);
|
|
}
|
|
#endif /* 0 */
|
|
|
|
/**
|
|
* snd_pcm_hw_param_value
|
|
*
|
|
* Return the value for field PAR if it's fixed in configuration space
|
|
* defined by PARAMS. Return -EINVAL otherwise
|
|
*/
|
|
static int snd_pcm_hw_param_value(const snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, int *dir)
|
|
{
|
|
if (hw_is_mask(var)) {
|
|
const snd_mask_t *mask = hw_param_mask_c(params, var);
|
|
if (!snd_mask_single(mask))
|
|
return -EINVAL;
|
|
if (dir)
|
|
*dir = 0;
|
|
return snd_mask_value(mask);
|
|
}
|
|
if (hw_is_interval(var)) {
|
|
const snd_interval_t *i = hw_param_interval_c(params, var);
|
|
if (!snd_interval_single(i))
|
|
return -EINVAL;
|
|
if (dir)
|
|
*dir = i->openmin;
|
|
return snd_interval_value(i);
|
|
}
|
|
assert(0);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_param_value_min
|
|
*
|
|
* Return the minimum value for field PAR.
|
|
*/
|
|
unsigned int snd_pcm_hw_param_value_min(const snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, int *dir)
|
|
{
|
|
if (hw_is_mask(var)) {
|
|
if (dir)
|
|
*dir = 0;
|
|
return snd_mask_min(hw_param_mask_c(params, var));
|
|
}
|
|
if (hw_is_interval(var)) {
|
|
const snd_interval_t *i = hw_param_interval_c(params, var);
|
|
if (dir)
|
|
*dir = i->openmin;
|
|
return snd_interval_min(i);
|
|
}
|
|
assert(0);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_param_value_max
|
|
*
|
|
* Return the maximum value for field PAR.
|
|
*/
|
|
unsigned int snd_pcm_hw_param_value_max(const snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, int *dir)
|
|
{
|
|
if (hw_is_mask(var)) {
|
|
if (dir)
|
|
*dir = 0;
|
|
return snd_mask_max(hw_param_mask_c(params, var));
|
|
}
|
|
if (hw_is_interval(var)) {
|
|
const snd_interval_t *i = hw_param_interval_c(params, var);
|
|
if (dir)
|
|
*dir = - (int) i->openmax;
|
|
return snd_interval_max(i);
|
|
}
|
|
assert(0);
|
|
return -EINVAL;
|
|
}
|
|
|
|
void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
if (hw_is_mask(var)) {
|
|
snd_mask_none(hw_param_mask(params, var));
|
|
params->cmask |= 1 << var;
|
|
params->rmask |= 1 << var;
|
|
} else if (hw_is_interval(var)) {
|
|
snd_interval_none(hw_param_interval(params, var));
|
|
params->cmask |= 1 << var;
|
|
params->rmask |= 1 << var;
|
|
} else {
|
|
snd_BUG();
|
|
}
|
|
}
|
|
|
|
int _snd_pcm_hw_param_setinteger(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
int changed;
|
|
assert(hw_is_interval(var));
|
|
changed = snd_interval_setinteger(hw_param_interval(params, var));
|
|
if (changed) {
|
|
params->cmask |= 1 << var;
|
|
params->rmask |= 1 << var;
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
#if 0
|
|
/**
|
|
* snd_pcm_hw_param_setinteger
|
|
*
|
|
* Inside configuration space defined by PARAMS remove from PAR all
|
|
* non integer values. Reduce configuration space accordingly.
|
|
* Return -EINVAL if the configuration space is empty
|
|
*/
|
|
int snd_pcm_hw_param_setinteger(snd_pcm_t *pcm,
|
|
snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
int changed = _snd_pcm_hw_param_setinteger(params, var);
|
|
if (changed < 0)
|
|
return changed;
|
|
if (params->rmask) {
|
|
int err = snd_pcm_hw_refine(pcm, params);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif /* 0 */
|
|
|
|
static int _snd_pcm_hw_param_first(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
int changed;
|
|
if (hw_is_mask(var))
|
|
changed = snd_mask_refine_first(hw_param_mask(params, var));
|
|
else if (hw_is_interval(var))
|
|
changed = snd_interval_refine_first(hw_param_interval(params, var));
|
|
else {
|
|
assert(0);
|
|
return -EINVAL;
|
|
}
|
|
if (changed) {
|
|
params->cmask |= 1 << var;
|
|
params->rmask |= 1 << var;
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
|
|
/**
|
|
* snd_pcm_hw_param_first
|
|
*
|
|
* Inside configuration space defined by PARAMS remove from PAR all
|
|
* values > minimum. Reduce configuration space accordingly.
|
|
* Return the minimum.
|
|
*/
|
|
static int snd_pcm_hw_param_first(snd_pcm_t *pcm,
|
|
snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, int *dir)
|
|
{
|
|
int changed = _snd_pcm_hw_param_first(params, var);
|
|
if (changed < 0)
|
|
return changed;
|
|
if (params->rmask) {
|
|
int err = snd_pcm_hw_refine(pcm, params);
|
|
assert(err >= 0);
|
|
}
|
|
return snd_pcm_hw_param_value(params, var, dir);
|
|
}
|
|
|
|
static int _snd_pcm_hw_param_last(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
int changed;
|
|
if (hw_is_mask(var))
|
|
changed = snd_mask_refine_last(hw_param_mask(params, var));
|
|
else if (hw_is_interval(var))
|
|
changed = snd_interval_refine_last(hw_param_interval(params, var));
|
|
else {
|
|
assert(0);
|
|
return -EINVAL;
|
|
}
|
|
if (changed) {
|
|
params->cmask |= 1 << var;
|
|
params->rmask |= 1 << var;
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
|
|
/**
|
|
* snd_pcm_hw_param_last
|
|
*
|
|
* Inside configuration space defined by PARAMS remove from PAR all
|
|
* values < maximum. Reduce configuration space accordingly.
|
|
* Return the maximum.
|
|
*/
|
|
static int snd_pcm_hw_param_last(snd_pcm_t *pcm,
|
|
snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, int *dir)
|
|
{
|
|
int changed = _snd_pcm_hw_param_last(params, var);
|
|
if (changed < 0)
|
|
return changed;
|
|
if (params->rmask) {
|
|
int err = snd_pcm_hw_refine(pcm, params);
|
|
assert(err >= 0);
|
|
}
|
|
return snd_pcm_hw_param_value(params, var, dir);
|
|
}
|
|
|
|
int _snd_pcm_hw_param_min(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, unsigned int val, int dir)
|
|
{
|
|
int changed;
|
|
int open = 0;
|
|
if (dir) {
|
|
if (dir > 0) {
|
|
open = 1;
|
|
} else if (dir < 0) {
|
|
if (val > 0) {
|
|
open = 1;
|
|
val--;
|
|
}
|
|
}
|
|
}
|
|
if (hw_is_mask(var))
|
|
changed = snd_mask_refine_min(hw_param_mask(params, var), val + !!open);
|
|
else if (hw_is_interval(var))
|
|
changed = snd_interval_refine_min(hw_param_interval(params, var), val, open);
|
|
else {
|
|
assert(0);
|
|
return -EINVAL;
|
|
}
|
|
if (changed) {
|
|
params->cmask |= 1 << var;
|
|
params->rmask |= 1 << var;
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_param_min
|
|
*
|
|
* Inside configuration space defined by PARAMS remove from PAR all
|
|
* values < VAL. Reduce configuration space accordingly.
|
|
* Return new minimum or -EINVAL if the configuration space is empty
|
|
*/
|
|
static int snd_pcm_hw_param_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, unsigned int val,
|
|
int *dir)
|
|
{
|
|
int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
|
|
if (changed < 0)
|
|
return changed;
|
|
if (params->rmask) {
|
|
int err = snd_pcm_hw_refine(pcm, params);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
return snd_pcm_hw_param_value_min(params, var, dir);
|
|
}
|
|
|
|
static int _snd_pcm_hw_param_max(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, unsigned int val,
|
|
int dir)
|
|
{
|
|
int changed;
|
|
int open = 0;
|
|
if (dir) {
|
|
if (dir < 0) {
|
|
open = 1;
|
|
} else if (dir > 0) {
|
|
open = 1;
|
|
val++;
|
|
}
|
|
}
|
|
if (hw_is_mask(var)) {
|
|
if (val == 0 && open) {
|
|
snd_mask_none(hw_param_mask(params, var));
|
|
changed = -EINVAL;
|
|
} else
|
|
changed = snd_mask_refine_max(hw_param_mask(params, var), val - !!open);
|
|
} else if (hw_is_interval(var))
|
|
changed = snd_interval_refine_max(hw_param_interval(params, var), val, open);
|
|
else {
|
|
assert(0);
|
|
return -EINVAL;
|
|
}
|
|
if (changed) {
|
|
params->cmask |= 1 << var;
|
|
params->rmask |= 1 << var;
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_param_max
|
|
*
|
|
* Inside configuration space defined by PARAMS remove from PAR all
|
|
* values >= VAL + 1. Reduce configuration space accordingly.
|
|
* Return new maximum or -EINVAL if the configuration space is empty
|
|
*/
|
|
static int snd_pcm_hw_param_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, unsigned int val,
|
|
int *dir)
|
|
{
|
|
int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
|
|
if (changed < 0)
|
|
return changed;
|
|
if (params->rmask) {
|
|
int err = snd_pcm_hw_refine(pcm, params);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
return snd_pcm_hw_param_value_max(params, var, dir);
|
|
}
|
|
|
|
int _snd_pcm_hw_param_set(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, unsigned int val, int dir)
|
|
{
|
|
int changed;
|
|
if (hw_is_mask(var)) {
|
|
snd_mask_t *m = hw_param_mask(params, var);
|
|
if (val == 0 && dir < 0) {
|
|
changed = -EINVAL;
|
|
snd_mask_none(m);
|
|
} else {
|
|
if (dir > 0)
|
|
val++;
|
|
else if (dir < 0)
|
|
val--;
|
|
changed = snd_mask_refine_set(hw_param_mask(params, var), val);
|
|
}
|
|
} else if (hw_is_interval(var)) {
|
|
snd_interval_t *i = hw_param_interval(params, var);
|
|
if (val == 0 && dir < 0) {
|
|
changed = -EINVAL;
|
|
snd_interval_none(i);
|
|
} else if (dir == 0)
|
|
changed = snd_interval_refine_set(i, val);
|
|
else {
|
|
snd_interval_t t;
|
|
t.openmin = 1;
|
|
t.openmax = 1;
|
|
t.empty = 0;
|
|
t.integer = 0;
|
|
if (dir < 0) {
|
|
t.min = val - 1;
|
|
t.max = val;
|
|
} else {
|
|
t.min = val;
|
|
t.max = val+1;
|
|
}
|
|
changed = snd_interval_refine(i, &t);
|
|
}
|
|
} else {
|
|
assert(0);
|
|
return -EINVAL;
|
|
}
|
|
if (changed) {
|
|
params->cmask |= 1 << var;
|
|
params->rmask |= 1 << var;
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_param_set
|
|
*
|
|
* Inside configuration space defined by PARAMS remove from PAR all
|
|
* values != VAL. Reduce configuration space accordingly.
|
|
* Return VAL or -EINVAL if the configuration space is empty
|
|
*/
|
|
int snd_pcm_hw_param_set(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, unsigned int val, int dir)
|
|
{
|
|
int changed = _snd_pcm_hw_param_set(params, var, val, dir);
|
|
if (changed < 0)
|
|
return changed;
|
|
if (params->rmask) {
|
|
int err = snd_pcm_hw_refine(pcm, params);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
return snd_pcm_hw_param_value(params, var, NULL);
|
|
}
|
|
|
|
static int _snd_pcm_hw_param_mask(snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, const snd_mask_t *val)
|
|
{
|
|
int changed;
|
|
assert(hw_is_mask(var));
|
|
changed = snd_mask_refine(hw_param_mask(params, var), val);
|
|
if (changed) {
|
|
params->cmask |= 1 << var;
|
|
params->rmask |= 1 << var;
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_param_mask
|
|
*
|
|
* Inside configuration space defined by PARAMS remove from PAR all values
|
|
* not contained in MASK. Reduce configuration space accordingly.
|
|
* This function can be called only for SNDRV_PCM_HW_PARAM_ACCESS,
|
|
* SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
|
|
* Return 0 on success or -EINVAL
|
|
* if the configuration space is empty
|
|
*/
|
|
int snd_pcm_hw_param_mask(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, const snd_mask_t *val)
|
|
{
|
|
int changed = _snd_pcm_hw_param_mask(params, var, val);
|
|
if (changed < 0)
|
|
return changed;
|
|
if (params->rmask) {
|
|
int err = snd_pcm_hw_refine(pcm, params);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int boundary_sub(int a, int adir,
|
|
int b, int bdir,
|
|
int *c, int *cdir)
|
|
{
|
|
adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
|
|
bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
|
|
*c = a - b;
|
|
*cdir = adir - bdir;
|
|
if (*cdir == -2) {
|
|
assert(*c > INT_MIN);
|
|
(*c)--;
|
|
} else if (*cdir == 2) {
|
|
assert(*c < INT_MAX);
|
|
(*c)++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int boundary_lt(unsigned int a, int adir,
|
|
unsigned int b, int bdir)
|
|
{
|
|
assert(a > 0 || adir >= 0);
|
|
assert(b > 0 || bdir >= 0);
|
|
if (adir < 0) {
|
|
a--;
|
|
adir = 1;
|
|
} else if (adir > 0)
|
|
adir = 1;
|
|
if (bdir < 0) {
|
|
b--;
|
|
bdir = 1;
|
|
} else if (bdir > 0)
|
|
bdir = 1;
|
|
return a < b || (a == b && adir < bdir);
|
|
}
|
|
|
|
/* Return 1 if min is nearer to best than max */
|
|
static int boundary_nearer(int min, int mindir,
|
|
int best, int bestdir,
|
|
int max, int maxdir)
|
|
{
|
|
int dmin, dmindir;
|
|
int dmax, dmaxdir;
|
|
boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
|
|
boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
|
|
return boundary_lt(dmin, dmindir, dmax, dmaxdir);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_param_near
|
|
*
|
|
* Inside configuration space defined by PARAMS set PAR to the available value
|
|
* nearest to VAL. Reduce configuration space accordingly.
|
|
* This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
|
|
* SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
|
|
* Return the value found.
|
|
*/
|
|
int snd_pcm_hw_param_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
|
|
snd_pcm_hw_param_t var, unsigned int best, int *dir)
|
|
{
|
|
snd_pcm_hw_params_t *save = NULL;
|
|
int v;
|
|
unsigned int saved_min;
|
|
int last = 0;
|
|
int min, max;
|
|
int mindir, maxdir;
|
|
int valdir = dir ? *dir : 0;
|
|
/* FIXME */
|
|
if (best > INT_MAX)
|
|
best = INT_MAX;
|
|
min = max = best;
|
|
mindir = maxdir = valdir;
|
|
if (maxdir > 0)
|
|
maxdir = 0;
|
|
else if (maxdir == 0)
|
|
maxdir = -1;
|
|
else {
|
|
maxdir = 1;
|
|
max--;
|
|
}
|
|
save = kmalloc(sizeof(*save), GFP_KERNEL);
|
|
if (save == NULL)
|
|
return -ENOMEM;
|
|
*save = *params;
|
|
saved_min = min;
|
|
min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
|
|
if (min >= 0) {
|
|
snd_pcm_hw_params_t *params1;
|
|
if (max < 0)
|
|
goto _end;
|
|
if ((unsigned int)min == saved_min && mindir == valdir)
|
|
goto _end;
|
|
params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
|
|
if (params1 == NULL) {
|
|
kfree(save);
|
|
return -ENOMEM;
|
|
}
|
|
*params1 = *save;
|
|
max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
|
|
if (max < 0) {
|
|
kfree(params1);
|
|
goto _end;
|
|
}
|
|
if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
|
|
*params = *params1;
|
|
last = 1;
|
|
}
|
|
kfree(params1);
|
|
} else {
|
|
*params = *save;
|
|
max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
|
|
assert(max >= 0);
|
|
last = 1;
|
|
}
|
|
_end:
|
|
kfree(save);
|
|
if (last)
|
|
v = snd_pcm_hw_param_last(pcm, params, var, dir);
|
|
else
|
|
v = snd_pcm_hw_param_first(pcm, params, var, dir);
|
|
assert(v >= 0);
|
|
return v;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_hw_param_choose
|
|
*
|
|
* Choose one configuration from configuration space defined by PARAMS
|
|
* The configuration chosen is that obtained fixing in this order:
|
|
* first access, first format, first subformat, min channels,
|
|
* min rate, min period time, max buffer size, min tick time
|
|
*/
|
|
int snd_pcm_hw_params_choose(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
|
|
{
|
|
int err;
|
|
|
|
err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_ACCESS, NULL);
|
|
assert(err >= 0);
|
|
|
|
err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_FORMAT, NULL);
|
|
assert(err >= 0);
|
|
|
|
err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_SUBFORMAT, NULL);
|
|
assert(err >= 0);
|
|
|
|
err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_CHANNELS, NULL);
|
|
assert(err >= 0);
|
|
|
|
err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_RATE, NULL);
|
|
assert(err >= 0);
|
|
|
|
err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_PERIOD_TIME, NULL);
|
|
assert(err >= 0);
|
|
|
|
err = snd_pcm_hw_param_last(pcm, params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL);
|
|
assert(err >= 0);
|
|
|
|
err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_TICK_TIME, NULL);
|
|
assert(err >= 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#undef snd_pcm_t
|
|
#undef assert
|
|
|
|
static int snd_pcm_lib_ioctl_reset(snd_pcm_substream_t *substream,
|
|
void *arg)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
unsigned long flags;
|
|
snd_pcm_stream_lock_irqsave(substream, flags);
|
|
if (snd_pcm_running(substream) &&
|
|
snd_pcm_update_hw_ptr(substream) >= 0)
|
|
runtime->status->hw_ptr %= runtime->buffer_size;
|
|
else
|
|
runtime->status->hw_ptr = 0;
|
|
snd_pcm_stream_unlock_irqrestore(substream, flags);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_lib_ioctl_channel_info(snd_pcm_substream_t *substream,
|
|
void *arg)
|
|
{
|
|
snd_pcm_channel_info_t *info = arg;
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
int width;
|
|
if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) {
|
|
info->offset = -1;
|
|
return 0;
|
|
}
|
|
width = snd_pcm_format_physical_width(runtime->format);
|
|
if (width < 0)
|
|
return width;
|
|
info->offset = 0;
|
|
switch (runtime->access) {
|
|
case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED:
|
|
case SNDRV_PCM_ACCESS_RW_INTERLEAVED:
|
|
info->first = info->channel * width;
|
|
info->step = runtime->channels * width;
|
|
break;
|
|
case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED:
|
|
case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED:
|
|
{
|
|
size_t size = runtime->dma_bytes / runtime->channels;
|
|
info->first = info->channel * size * 8;
|
|
info->step = width;
|
|
break;
|
|
}
|
|
default:
|
|
snd_BUG();
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_lib_ioctl - a generic PCM ioctl callback
|
|
* @substream: the pcm substream instance
|
|
* @cmd: ioctl command
|
|
* @arg: ioctl argument
|
|
*
|
|
* Processes the generic ioctl commands for PCM.
|
|
* Can be passed as the ioctl callback for PCM ops.
|
|
*
|
|
* Returns zero if successful, or a negative error code on failure.
|
|
*/
|
|
int snd_pcm_lib_ioctl(snd_pcm_substream_t *substream,
|
|
unsigned int cmd, void *arg)
|
|
{
|
|
switch (cmd) {
|
|
case SNDRV_PCM_IOCTL1_INFO:
|
|
return 0;
|
|
case SNDRV_PCM_IOCTL1_RESET:
|
|
return snd_pcm_lib_ioctl_reset(substream, arg);
|
|
case SNDRV_PCM_IOCTL1_CHANNEL_INFO:
|
|
return snd_pcm_lib_ioctl_channel_info(substream, arg);
|
|
}
|
|
return -ENXIO;
|
|
}
|
|
|
|
/*
|
|
* Conditions
|
|
*/
|
|
|
|
static void snd_pcm_system_tick_set(snd_pcm_substream_t *substream,
|
|
unsigned long ticks)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
if (ticks == 0)
|
|
del_timer(&runtime->tick_timer);
|
|
else {
|
|
ticks += (1000000 / HZ) - 1;
|
|
ticks /= (1000000 / HZ);
|
|
mod_timer(&runtime->tick_timer, jiffies + ticks);
|
|
}
|
|
}
|
|
|
|
/* Temporary alias */
|
|
void snd_pcm_tick_set(snd_pcm_substream_t *substream, unsigned long ticks)
|
|
{
|
|
snd_pcm_system_tick_set(substream, ticks);
|
|
}
|
|
|
|
void snd_pcm_tick_prepare(snd_pcm_substream_t *substream)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
snd_pcm_uframes_t frames = ULONG_MAX;
|
|
snd_pcm_uframes_t avail, dist;
|
|
unsigned int ticks;
|
|
u_int64_t n;
|
|
u_int32_t r;
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
if (runtime->silence_size >= runtime->boundary) {
|
|
frames = 1;
|
|
} else if (runtime->silence_size > 0 &&
|
|
runtime->silence_filled < runtime->buffer_size) {
|
|
snd_pcm_sframes_t noise_dist;
|
|
noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled;
|
|
snd_assert(noise_dist <= (snd_pcm_sframes_t)runtime->silence_threshold, );
|
|
frames = noise_dist - runtime->silence_threshold;
|
|
}
|
|
avail = snd_pcm_playback_avail(runtime);
|
|
} else {
|
|
avail = snd_pcm_capture_avail(runtime);
|
|
}
|
|
if (avail < runtime->control->avail_min) {
|
|
snd_pcm_sframes_t n = runtime->control->avail_min - avail;
|
|
if (n > 0 && frames > (snd_pcm_uframes_t)n)
|
|
frames = n;
|
|
}
|
|
if (avail < runtime->buffer_size) {
|
|
snd_pcm_sframes_t n = runtime->buffer_size - avail;
|
|
if (n > 0 && frames > (snd_pcm_uframes_t)n)
|
|
frames = n;
|
|
}
|
|
if (frames == ULONG_MAX) {
|
|
snd_pcm_tick_set(substream, 0);
|
|
return;
|
|
}
|
|
dist = runtime->status->hw_ptr - runtime->hw_ptr_base;
|
|
/* Distance to next interrupt */
|
|
dist = runtime->period_size - dist % runtime->period_size;
|
|
if (dist <= frames) {
|
|
snd_pcm_tick_set(substream, 0);
|
|
return;
|
|
}
|
|
/* the base time is us */
|
|
n = frames;
|
|
n *= 1000000;
|
|
div64_32(&n, runtime->tick_time * runtime->rate, &r);
|
|
ticks = n + (r > 0 ? 1 : 0);
|
|
if (ticks < runtime->sleep_min)
|
|
ticks = runtime->sleep_min;
|
|
snd_pcm_tick_set(substream, (unsigned long) ticks);
|
|
}
|
|
|
|
void snd_pcm_tick_elapsed(snd_pcm_substream_t *substream)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
unsigned long flags;
|
|
|
|
snd_assert(substream != NULL, return);
|
|
runtime = substream->runtime;
|
|
snd_assert(runtime != NULL, return);
|
|
|
|
snd_pcm_stream_lock_irqsave(substream, flags);
|
|
if (!snd_pcm_running(substream) ||
|
|
snd_pcm_update_hw_ptr(substream) < 0)
|
|
goto _end;
|
|
if (runtime->sleep_min)
|
|
snd_pcm_tick_prepare(substream);
|
|
_end:
|
|
snd_pcm_stream_unlock_irqrestore(substream, flags);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_period_elapsed - update the pcm status for the next period
|
|
* @substream: the pcm substream instance
|
|
*
|
|
* This function is called from the interrupt handler when the
|
|
* PCM has processed the period size. It will update the current
|
|
* pointer, set up the tick, wake up sleepers, etc.
|
|
*
|
|
* Even if more than one periods have elapsed since the last call, you
|
|
* have to call this only once.
|
|
*/
|
|
void snd_pcm_period_elapsed(snd_pcm_substream_t *substream)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
unsigned long flags;
|
|
|
|
snd_assert(substream != NULL, return);
|
|
runtime = substream->runtime;
|
|
snd_assert(runtime != NULL, return);
|
|
|
|
if (runtime->transfer_ack_begin)
|
|
runtime->transfer_ack_begin(substream);
|
|
|
|
snd_pcm_stream_lock_irqsave(substream, flags);
|
|
if (!snd_pcm_running(substream) ||
|
|
snd_pcm_update_hw_ptr_interrupt(substream) < 0)
|
|
goto _end;
|
|
|
|
if (substream->timer_running)
|
|
snd_timer_interrupt(substream->timer, 1);
|
|
if (runtime->sleep_min)
|
|
snd_pcm_tick_prepare(substream);
|
|
_end:
|
|
snd_pcm_stream_unlock_irqrestore(substream, flags);
|
|
if (runtime->transfer_ack_end)
|
|
runtime->transfer_ack_end(substream);
|
|
kill_fasync(&runtime->fasync, SIGIO, POLL_IN);
|
|
}
|
|
|
|
static int snd_pcm_lib_write_transfer(snd_pcm_substream_t *substream,
|
|
unsigned int hwoff,
|
|
unsigned long data, unsigned int off,
|
|
snd_pcm_uframes_t frames)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
int err;
|
|
char __user *buf = (char __user *) data + frames_to_bytes(runtime, off);
|
|
if (substream->ops->copy) {
|
|
if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0)
|
|
return err;
|
|
} else {
|
|
char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff);
|
|
snd_assert(runtime->dma_area, return -EFAULT);
|
|
if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames)))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
typedef int (*transfer_f)(snd_pcm_substream_t *substream, unsigned int hwoff,
|
|
unsigned long data, unsigned int off,
|
|
snd_pcm_uframes_t size);
|
|
|
|
static snd_pcm_sframes_t snd_pcm_lib_write1(snd_pcm_substream_t *substream,
|
|
unsigned long data,
|
|
snd_pcm_uframes_t size,
|
|
int nonblock,
|
|
transfer_f transfer)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
snd_pcm_uframes_t xfer = 0;
|
|
snd_pcm_uframes_t offset = 0;
|
|
int err = 0;
|
|
|
|
if (size == 0)
|
|
return 0;
|
|
if (size > runtime->xfer_align)
|
|
size -= size % runtime->xfer_align;
|
|
|
|
snd_pcm_stream_lock_irq(substream);
|
|
switch (runtime->status->state) {
|
|
case SNDRV_PCM_STATE_PREPARED:
|
|
case SNDRV_PCM_STATE_RUNNING:
|
|
case SNDRV_PCM_STATE_PAUSED:
|
|
break;
|
|
case SNDRV_PCM_STATE_XRUN:
|
|
err = -EPIPE;
|
|
goto _end_unlock;
|
|
case SNDRV_PCM_STATE_SUSPENDED:
|
|
err = -ESTRPIPE;
|
|
goto _end_unlock;
|
|
default:
|
|
err = -EBADFD;
|
|
goto _end_unlock;
|
|
}
|
|
|
|
while (size > 0) {
|
|
snd_pcm_uframes_t frames, appl_ptr, appl_ofs;
|
|
snd_pcm_uframes_t avail;
|
|
snd_pcm_uframes_t cont;
|
|
if (runtime->sleep_min == 0 && runtime->status->state == SNDRV_PCM_STATE_RUNNING)
|
|
snd_pcm_update_hw_ptr(substream);
|
|
avail = snd_pcm_playback_avail(runtime);
|
|
if (((avail < runtime->control->avail_min && size > avail) ||
|
|
(size >= runtime->xfer_align && avail < runtime->xfer_align))) {
|
|
wait_queue_t wait;
|
|
enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state;
|
|
long tout;
|
|
|
|
if (nonblock) {
|
|
err = -EAGAIN;
|
|
goto _end_unlock;
|
|
}
|
|
|
|
init_waitqueue_entry(&wait, current);
|
|
add_wait_queue(&runtime->sleep, &wait);
|
|
while (1) {
|
|
if (signal_pending(current)) {
|
|
state = SIGNALED;
|
|
break;
|
|
}
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
snd_pcm_stream_unlock_irq(substream);
|
|
tout = schedule_timeout(10 * HZ);
|
|
snd_pcm_stream_lock_irq(substream);
|
|
if (tout == 0) {
|
|
if (runtime->status->state != SNDRV_PCM_STATE_PREPARED &&
|
|
runtime->status->state != SNDRV_PCM_STATE_PAUSED) {
|
|
state = runtime->status->state == SNDRV_PCM_STATE_SUSPENDED ? SUSPENDED : EXPIRED;
|
|
break;
|
|
}
|
|
}
|
|
switch (runtime->status->state) {
|
|
case SNDRV_PCM_STATE_XRUN:
|
|
case SNDRV_PCM_STATE_DRAINING:
|
|
state = ERROR;
|
|
goto _end_loop;
|
|
case SNDRV_PCM_STATE_SUSPENDED:
|
|
state = SUSPENDED;
|
|
goto _end_loop;
|
|
case SNDRV_PCM_STATE_SETUP:
|
|
state = DROPPED;
|
|
goto _end_loop;
|
|
default:
|
|
break;
|
|
}
|
|
avail = snd_pcm_playback_avail(runtime);
|
|
if (avail >= runtime->control->avail_min) {
|
|
state = READY;
|
|
break;
|
|
}
|
|
}
|
|
_end_loop:
|
|
remove_wait_queue(&runtime->sleep, &wait);
|
|
|
|
switch (state) {
|
|
case ERROR:
|
|
err = -EPIPE;
|
|
goto _end_unlock;
|
|
case SUSPENDED:
|
|
err = -ESTRPIPE;
|
|
goto _end_unlock;
|
|
case SIGNALED:
|
|
err = -ERESTARTSYS;
|
|
goto _end_unlock;
|
|
case EXPIRED:
|
|
snd_printd("playback write error (DMA or IRQ trouble?)\n");
|
|
err = -EIO;
|
|
goto _end_unlock;
|
|
case DROPPED:
|
|
err = -EBADFD;
|
|
goto _end_unlock;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
if (avail > runtime->xfer_align)
|
|
avail -= avail % runtime->xfer_align;
|
|
frames = size > avail ? avail : size;
|
|
cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
|
|
if (frames > cont)
|
|
frames = cont;
|
|
snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL);
|
|
appl_ptr = runtime->control->appl_ptr;
|
|
appl_ofs = appl_ptr % runtime->buffer_size;
|
|
snd_pcm_stream_unlock_irq(substream);
|
|
if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0)
|
|
goto _end;
|
|
snd_pcm_stream_lock_irq(substream);
|
|
switch (runtime->status->state) {
|
|
case SNDRV_PCM_STATE_XRUN:
|
|
err = -EPIPE;
|
|
goto _end_unlock;
|
|
case SNDRV_PCM_STATE_SUSPENDED:
|
|
err = -ESTRPIPE;
|
|
goto _end_unlock;
|
|
default:
|
|
break;
|
|
}
|
|
appl_ptr += frames;
|
|
if (appl_ptr >= runtime->boundary)
|
|
appl_ptr -= runtime->boundary;
|
|
runtime->control->appl_ptr = appl_ptr;
|
|
if (substream->ops->ack)
|
|
substream->ops->ack(substream);
|
|
|
|
offset += frames;
|
|
size -= frames;
|
|
xfer += frames;
|
|
if (runtime->status->state == SNDRV_PCM_STATE_PREPARED &&
|
|
snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) {
|
|
err = snd_pcm_start(substream);
|
|
if (err < 0)
|
|
goto _end_unlock;
|
|
}
|
|
if (runtime->sleep_min &&
|
|
runtime->status->state == SNDRV_PCM_STATE_RUNNING)
|
|
snd_pcm_tick_prepare(substream);
|
|
}
|
|
_end_unlock:
|
|
snd_pcm_stream_unlock_irq(substream);
|
|
_end:
|
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : err;
|
|
}
|
|
|
|
snd_pcm_sframes_t snd_pcm_lib_write(snd_pcm_substream_t *substream, const void __user *buf, snd_pcm_uframes_t size)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
int nonblock;
|
|
|
|
snd_assert(substream != NULL, return -ENXIO);
|
|
runtime = substream->runtime;
|
|
snd_assert(runtime != NULL, return -ENXIO);
|
|
snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
|
|
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
|
|
return -EBADFD;
|
|
|
|
snd_assert(substream->ffile != NULL, return -ENXIO);
|
|
nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
|
|
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
|
|
if (substream->oss.oss) {
|
|
snd_pcm_oss_setup_t *setup = substream->oss.setup;
|
|
if (setup != NULL) {
|
|
if (setup->nonblock)
|
|
nonblock = 1;
|
|
else if (setup->block)
|
|
nonblock = 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED &&
|
|
runtime->channels > 1)
|
|
return -EINVAL;
|
|
return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock,
|
|
snd_pcm_lib_write_transfer);
|
|
}
|
|
|
|
static int snd_pcm_lib_writev_transfer(snd_pcm_substream_t *substream,
|
|
unsigned int hwoff,
|
|
unsigned long data, unsigned int off,
|
|
snd_pcm_uframes_t frames)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
int err;
|
|
void __user **bufs = (void __user **)data;
|
|
int channels = runtime->channels;
|
|
int c;
|
|
if (substream->ops->copy) {
|
|
snd_assert(substream->ops->silence != NULL, return -EINVAL);
|
|
for (c = 0; c < channels; ++c, ++bufs) {
|
|
if (*bufs == NULL) {
|
|
if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0)
|
|
return err;
|
|
} else {
|
|
char __user *buf = *bufs + samples_to_bytes(runtime, off);
|
|
if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0)
|
|
return err;
|
|
}
|
|
}
|
|
} else {
|
|
/* default transfer behaviour */
|
|
size_t dma_csize = runtime->dma_bytes / channels;
|
|
snd_assert(runtime->dma_area, return -EFAULT);
|
|
for (c = 0; c < channels; ++c, ++bufs) {
|
|
char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff);
|
|
if (*bufs == NULL) {
|
|
snd_pcm_format_set_silence(runtime->format, hwbuf, frames);
|
|
} else {
|
|
char __user *buf = *bufs + samples_to_bytes(runtime, off);
|
|
if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames)))
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
snd_pcm_sframes_t snd_pcm_lib_writev(snd_pcm_substream_t *substream,
|
|
void __user **bufs,
|
|
snd_pcm_uframes_t frames)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
int nonblock;
|
|
|
|
snd_assert(substream != NULL, return -ENXIO);
|
|
runtime = substream->runtime;
|
|
snd_assert(runtime != NULL, return -ENXIO);
|
|
snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
|
|
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
|
|
return -EBADFD;
|
|
|
|
snd_assert(substream->ffile != NULL, return -ENXIO);
|
|
nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
|
|
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
|
|
if (substream->oss.oss) {
|
|
snd_pcm_oss_setup_t *setup = substream->oss.setup;
|
|
if (setup != NULL) {
|
|
if (setup->nonblock)
|
|
nonblock = 1;
|
|
else if (setup->block)
|
|
nonblock = 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
|
|
return -EINVAL;
|
|
return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames,
|
|
nonblock, snd_pcm_lib_writev_transfer);
|
|
}
|
|
|
|
static int snd_pcm_lib_read_transfer(snd_pcm_substream_t *substream,
|
|
unsigned int hwoff,
|
|
unsigned long data, unsigned int off,
|
|
snd_pcm_uframes_t frames)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
int err;
|
|
char __user *buf = (char __user *) data + frames_to_bytes(runtime, off);
|
|
if (substream->ops->copy) {
|
|
if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0)
|
|
return err;
|
|
} else {
|
|
char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff);
|
|
snd_assert(runtime->dma_area, return -EFAULT);
|
|
if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames)))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static snd_pcm_sframes_t snd_pcm_lib_read1(snd_pcm_substream_t *substream,
|
|
unsigned long data,
|
|
snd_pcm_uframes_t size,
|
|
int nonblock,
|
|
transfer_f transfer)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
snd_pcm_uframes_t xfer = 0;
|
|
snd_pcm_uframes_t offset = 0;
|
|
int err = 0;
|
|
|
|
if (size == 0)
|
|
return 0;
|
|
if (size > runtime->xfer_align)
|
|
size -= size % runtime->xfer_align;
|
|
|
|
snd_pcm_stream_lock_irq(substream);
|
|
switch (runtime->status->state) {
|
|
case SNDRV_PCM_STATE_PREPARED:
|
|
if (size >= runtime->start_threshold) {
|
|
err = snd_pcm_start(substream);
|
|
if (err < 0)
|
|
goto _end_unlock;
|
|
}
|
|
break;
|
|
case SNDRV_PCM_STATE_DRAINING:
|
|
case SNDRV_PCM_STATE_RUNNING:
|
|
case SNDRV_PCM_STATE_PAUSED:
|
|
break;
|
|
case SNDRV_PCM_STATE_XRUN:
|
|
err = -EPIPE;
|
|
goto _end_unlock;
|
|
case SNDRV_PCM_STATE_SUSPENDED:
|
|
err = -ESTRPIPE;
|
|
goto _end_unlock;
|
|
default:
|
|
err = -EBADFD;
|
|
goto _end_unlock;
|
|
}
|
|
|
|
while (size > 0) {
|
|
snd_pcm_uframes_t frames, appl_ptr, appl_ofs;
|
|
snd_pcm_uframes_t avail;
|
|
snd_pcm_uframes_t cont;
|
|
if (runtime->sleep_min == 0 && runtime->status->state == SNDRV_PCM_STATE_RUNNING)
|
|
snd_pcm_update_hw_ptr(substream);
|
|
__draining:
|
|
avail = snd_pcm_capture_avail(runtime);
|
|
if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
|
|
if (avail < runtime->xfer_align) {
|
|
err = -EPIPE;
|
|
goto _end_unlock;
|
|
}
|
|
} else if ((avail < runtime->control->avail_min && size > avail) ||
|
|
(size >= runtime->xfer_align && avail < runtime->xfer_align)) {
|
|
wait_queue_t wait;
|
|
enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state;
|
|
long tout;
|
|
|
|
if (nonblock) {
|
|
err = -EAGAIN;
|
|
goto _end_unlock;
|
|
}
|
|
|
|
init_waitqueue_entry(&wait, current);
|
|
add_wait_queue(&runtime->sleep, &wait);
|
|
while (1) {
|
|
if (signal_pending(current)) {
|
|
state = SIGNALED;
|
|
break;
|
|
}
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
snd_pcm_stream_unlock_irq(substream);
|
|
tout = schedule_timeout(10 * HZ);
|
|
snd_pcm_stream_lock_irq(substream);
|
|
if (tout == 0) {
|
|
if (runtime->status->state != SNDRV_PCM_STATE_PREPARED &&
|
|
runtime->status->state != SNDRV_PCM_STATE_PAUSED) {
|
|
state = runtime->status->state == SNDRV_PCM_STATE_SUSPENDED ? SUSPENDED : EXPIRED;
|
|
break;
|
|
}
|
|
}
|
|
switch (runtime->status->state) {
|
|
case SNDRV_PCM_STATE_XRUN:
|
|
state = ERROR;
|
|
goto _end_loop;
|
|
case SNDRV_PCM_STATE_SUSPENDED:
|
|
state = SUSPENDED;
|
|
goto _end_loop;
|
|
case SNDRV_PCM_STATE_DRAINING:
|
|
goto __draining;
|
|
case SNDRV_PCM_STATE_SETUP:
|
|
state = DROPPED;
|
|
goto _end_loop;
|
|
default:
|
|
break;
|
|
}
|
|
avail = snd_pcm_capture_avail(runtime);
|
|
if (avail >= runtime->control->avail_min) {
|
|
state = READY;
|
|
break;
|
|
}
|
|
}
|
|
_end_loop:
|
|
remove_wait_queue(&runtime->sleep, &wait);
|
|
|
|
switch (state) {
|
|
case ERROR:
|
|
err = -EPIPE;
|
|
goto _end_unlock;
|
|
case SUSPENDED:
|
|
err = -ESTRPIPE;
|
|
goto _end_unlock;
|
|
case SIGNALED:
|
|
err = -ERESTARTSYS;
|
|
goto _end_unlock;
|
|
case EXPIRED:
|
|
snd_printd("capture read error (DMA or IRQ trouble?)\n");
|
|
err = -EIO;
|
|
goto _end_unlock;
|
|
case DROPPED:
|
|
err = -EBADFD;
|
|
goto _end_unlock;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
if (avail > runtime->xfer_align)
|
|
avail -= avail % runtime->xfer_align;
|
|
frames = size > avail ? avail : size;
|
|
cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
|
|
if (frames > cont)
|
|
frames = cont;
|
|
snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL);
|
|
appl_ptr = runtime->control->appl_ptr;
|
|
appl_ofs = appl_ptr % runtime->buffer_size;
|
|
snd_pcm_stream_unlock_irq(substream);
|
|
if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0)
|
|
goto _end;
|
|
snd_pcm_stream_lock_irq(substream);
|
|
switch (runtime->status->state) {
|
|
case SNDRV_PCM_STATE_XRUN:
|
|
err = -EPIPE;
|
|
goto _end_unlock;
|
|
case SNDRV_PCM_STATE_SUSPENDED:
|
|
err = -ESTRPIPE;
|
|
goto _end_unlock;
|
|
default:
|
|
break;
|
|
}
|
|
appl_ptr += frames;
|
|
if (appl_ptr >= runtime->boundary)
|
|
appl_ptr -= runtime->boundary;
|
|
runtime->control->appl_ptr = appl_ptr;
|
|
if (substream->ops->ack)
|
|
substream->ops->ack(substream);
|
|
|
|
offset += frames;
|
|
size -= frames;
|
|
xfer += frames;
|
|
if (runtime->sleep_min &&
|
|
runtime->status->state == SNDRV_PCM_STATE_RUNNING)
|
|
snd_pcm_tick_prepare(substream);
|
|
}
|
|
_end_unlock:
|
|
snd_pcm_stream_unlock_irq(substream);
|
|
_end:
|
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : err;
|
|
}
|
|
|
|
snd_pcm_sframes_t snd_pcm_lib_read(snd_pcm_substream_t *substream, void __user *buf, snd_pcm_uframes_t size)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
int nonblock;
|
|
|
|
snd_assert(substream != NULL, return -ENXIO);
|
|
runtime = substream->runtime;
|
|
snd_assert(runtime != NULL, return -ENXIO);
|
|
snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
|
|
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
|
|
return -EBADFD;
|
|
|
|
snd_assert(substream->ffile != NULL, return -ENXIO);
|
|
nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
|
|
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
|
|
if (substream->oss.oss) {
|
|
snd_pcm_oss_setup_t *setup = substream->oss.setup;
|
|
if (setup != NULL) {
|
|
if (setup->nonblock)
|
|
nonblock = 1;
|
|
else if (setup->block)
|
|
nonblock = 0;
|
|
}
|
|
}
|
|
#endif
|
|
if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED)
|
|
return -EINVAL;
|
|
return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer);
|
|
}
|
|
|
|
static int snd_pcm_lib_readv_transfer(snd_pcm_substream_t *substream,
|
|
unsigned int hwoff,
|
|
unsigned long data, unsigned int off,
|
|
snd_pcm_uframes_t frames)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
int err;
|
|
void __user **bufs = (void __user **)data;
|
|
int channels = runtime->channels;
|
|
int c;
|
|
if (substream->ops->copy) {
|
|
for (c = 0; c < channels; ++c, ++bufs) {
|
|
char __user *buf;
|
|
if (*bufs == NULL)
|
|
continue;
|
|
buf = *bufs + samples_to_bytes(runtime, off);
|
|
if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0)
|
|
return err;
|
|
}
|
|
} else {
|
|
snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels;
|
|
snd_assert(runtime->dma_area, return -EFAULT);
|
|
for (c = 0; c < channels; ++c, ++bufs) {
|
|
char *hwbuf;
|
|
char __user *buf;
|
|
if (*bufs == NULL)
|
|
continue;
|
|
|
|
hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff);
|
|
buf = *bufs + samples_to_bytes(runtime, off);
|
|
if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames)))
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
snd_pcm_sframes_t snd_pcm_lib_readv(snd_pcm_substream_t *substream,
|
|
void __user **bufs,
|
|
snd_pcm_uframes_t frames)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
int nonblock;
|
|
|
|
snd_assert(substream != NULL, return -ENXIO);
|
|
runtime = substream->runtime;
|
|
snd_assert(runtime != NULL, return -ENXIO);
|
|
snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
|
|
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
|
|
return -EBADFD;
|
|
|
|
snd_assert(substream->ffile != NULL, return -ENXIO);
|
|
nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
|
|
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
|
|
if (substream->oss.oss) {
|
|
snd_pcm_oss_setup_t *setup = substream->oss.setup;
|
|
if (setup != NULL) {
|
|
if (setup->nonblock)
|
|
nonblock = 1;
|
|
else if (setup->block)
|
|
nonblock = 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
|
|
return -EINVAL;
|
|
return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer);
|
|
}
|
|
|
|
/*
|
|
* Exported symbols
|
|
*/
|
|
|
|
EXPORT_SYMBOL(snd_interval_refine);
|
|
EXPORT_SYMBOL(snd_interval_list);
|
|
EXPORT_SYMBOL(snd_interval_ratnum);
|
|
EXPORT_SYMBOL(_snd_pcm_hw_params_any);
|
|
EXPORT_SYMBOL(_snd_pcm_hw_param_min);
|
|
EXPORT_SYMBOL(_snd_pcm_hw_param_set);
|
|
EXPORT_SYMBOL(_snd_pcm_hw_param_setempty);
|
|
EXPORT_SYMBOL(_snd_pcm_hw_param_setinteger);
|
|
EXPORT_SYMBOL(snd_pcm_hw_param_value_min);
|
|
EXPORT_SYMBOL(snd_pcm_hw_param_value_max);
|
|
EXPORT_SYMBOL(snd_pcm_hw_param_mask);
|
|
EXPORT_SYMBOL(snd_pcm_hw_param_first);
|
|
EXPORT_SYMBOL(snd_pcm_hw_param_last);
|
|
EXPORT_SYMBOL(snd_pcm_hw_param_near);
|
|
EXPORT_SYMBOL(snd_pcm_hw_param_set);
|
|
EXPORT_SYMBOL(snd_pcm_hw_refine);
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraints_init);
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraints_complete);
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_list);
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_step);
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums);
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens);
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits);
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax);
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_integer);
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2);
|
|
EXPORT_SYMBOL(snd_pcm_hw_rule_add);
|
|
EXPORT_SYMBOL(snd_pcm_set_ops);
|
|
EXPORT_SYMBOL(snd_pcm_set_sync);
|
|
EXPORT_SYMBOL(snd_pcm_lib_ioctl);
|
|
EXPORT_SYMBOL(snd_pcm_stop);
|
|
EXPORT_SYMBOL(snd_pcm_period_elapsed);
|
|
EXPORT_SYMBOL(snd_pcm_lib_write);
|
|
EXPORT_SYMBOL(snd_pcm_lib_read);
|
|
EXPORT_SYMBOL(snd_pcm_lib_writev);
|
|
EXPORT_SYMBOL(snd_pcm_lib_readv);
|
|
EXPORT_SYMBOL(snd_pcm_lib_buffer_bytes);
|
|
EXPORT_SYMBOL(snd_pcm_lib_period_bytes);
|
|
/* pcm_memory.c */
|
|
EXPORT_SYMBOL(snd_pcm_lib_preallocate_free_for_all);
|
|
EXPORT_SYMBOL(snd_pcm_lib_preallocate_pages);
|
|
EXPORT_SYMBOL(snd_pcm_lib_preallocate_pages_for_all);
|
|
EXPORT_SYMBOL(snd_pcm_sgbuf_ops_page);
|
|
EXPORT_SYMBOL(snd_pcm_lib_malloc_pages);
|
|
EXPORT_SYMBOL(snd_pcm_lib_free_pages);
|