![Takashi Sakamoto](/assets/img/avatar_default.png)
In IEC 61883-6, MIDI messages are transferred in MIDI conformant data channel. Essentially, packet streaming layer is not responsible for MIDI functionality. This commit moves MIDI trigger helper function from the layer to AM824 layer. The rest of codes related to MIDI functionality will be moved in later commits. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
169 lines
3.9 KiB
C
169 lines
3.9 KiB
C
/*
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* fireworks_midi.c - a part of driver for Fireworks based devices
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*
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* Copyright (c) 2009-2010 Clemens Ladisch
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* Copyright (c) 2013-2014 Takashi Sakamoto
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*
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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#include "fireworks.h"
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static int midi_capture_open(struct snd_rawmidi_substream *substream)
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{
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struct snd_efw *efw = substream->rmidi->private_data;
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int err;
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err = snd_efw_stream_lock_try(efw);
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if (err < 0)
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goto end;
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atomic_inc(&efw->capture_substreams);
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err = snd_efw_stream_start_duplex(efw, 0);
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if (err < 0)
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snd_efw_stream_lock_release(efw);
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end:
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return err;
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}
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static int midi_playback_open(struct snd_rawmidi_substream *substream)
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{
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struct snd_efw *efw = substream->rmidi->private_data;
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int err;
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err = snd_efw_stream_lock_try(efw);
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if (err < 0)
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goto end;
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atomic_inc(&efw->playback_substreams);
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err = snd_efw_stream_start_duplex(efw, 0);
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if (err < 0)
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snd_efw_stream_lock_release(efw);
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end:
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return err;
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}
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static int midi_capture_close(struct snd_rawmidi_substream *substream)
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{
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struct snd_efw *efw = substream->rmidi->private_data;
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atomic_dec(&efw->capture_substreams);
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snd_efw_stream_stop_duplex(efw);
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snd_efw_stream_lock_release(efw);
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return 0;
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}
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static int midi_playback_close(struct snd_rawmidi_substream *substream)
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{
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struct snd_efw *efw = substream->rmidi->private_data;
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atomic_dec(&efw->playback_substreams);
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snd_efw_stream_stop_duplex(efw);
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snd_efw_stream_lock_release(efw);
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return 0;
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}
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static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
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{
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struct snd_efw *efw = substrm->rmidi->private_data;
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unsigned long flags;
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spin_lock_irqsave(&efw->lock, flags);
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if (up)
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amdtp_am824_midi_trigger(&efw->tx_stream,
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substrm->number, substrm);
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else
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amdtp_am824_midi_trigger(&efw->tx_stream,
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substrm->number, NULL);
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spin_unlock_irqrestore(&efw->lock, flags);
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}
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static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
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{
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struct snd_efw *efw = substrm->rmidi->private_data;
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unsigned long flags;
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spin_lock_irqsave(&efw->lock, flags);
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if (up)
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amdtp_am824_midi_trigger(&efw->rx_stream,
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substrm->number, substrm);
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else
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amdtp_am824_midi_trigger(&efw->rx_stream,
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substrm->number, NULL);
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spin_unlock_irqrestore(&efw->lock, flags);
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}
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static struct snd_rawmidi_ops midi_capture_ops = {
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.open = midi_capture_open,
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.close = midi_capture_close,
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.trigger = midi_capture_trigger,
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};
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static struct snd_rawmidi_ops midi_playback_ops = {
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.open = midi_playback_open,
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.close = midi_playback_close,
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.trigger = midi_playback_trigger,
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};
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static void set_midi_substream_names(struct snd_efw *efw,
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struct snd_rawmidi_str *str)
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{
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struct snd_rawmidi_substream *subs;
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list_for_each_entry(subs, &str->substreams, list) {
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snprintf(subs->name, sizeof(subs->name),
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"%s MIDI %d", efw->card->shortname, subs->number + 1);
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}
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}
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int snd_efw_create_midi_devices(struct snd_efw *efw)
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{
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struct snd_rawmidi *rmidi;
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struct snd_rawmidi_str *str;
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int err;
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/* create midi ports */
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err = snd_rawmidi_new(efw->card, efw->card->driver, 0,
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efw->midi_out_ports, efw->midi_in_ports,
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&rmidi);
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if (err < 0)
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return err;
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snprintf(rmidi->name, sizeof(rmidi->name),
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"%s MIDI", efw->card->shortname);
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rmidi->private_data = efw;
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if (efw->midi_in_ports > 0) {
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
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&midi_capture_ops);
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str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
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set_midi_substream_names(efw, str);
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}
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if (efw->midi_out_ports > 0) {
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
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&midi_playback_ops);
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str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
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set_midi_substream_names(efw, str);
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}
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if ((efw->midi_out_ports > 0) && (efw->midi_in_ports > 0))
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
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return 0;
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}
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