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Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the + library `Frob' (a library for tweaking knobs) written by James Random + Hacker. + + {signature of Ty Coon}, 1 April 1990 + Ty Coon, President of Vice + +That's all there is to it! diff --git a/pipewire-alsa/README.md b/pipewire-alsa/README.md new file mode 100644 index 000000000..4e0f3a40d --- /dev/null +++ b/pipewire-alsa/README.md @@ -0,0 +1,2 @@ +# pipewire-alsa +ALSA plugin for pipewire diff --git a/pipewire-alsa/alsa-plugins/meson.build b/pipewire-alsa/alsa-plugins/meson.build new file mode 100644 index 000000000..9777acc89 --- /dev/null +++ b/pipewire-alsa/alsa-plugins/meson.build @@ -0,0 +1,17 @@ +pipewire_alsa_plugin_sources = [ + 'pcm_pipewire.c', +] + +pipewire_alsa_plugin_c_args = [ + '-DHAVE_CONFIG_H', + '-DPIC', +] + +pipewire_alsa_plugin = shared_library('asound_module_pcm_pipewire', + pipewire_alsa_plugin_sources, + c_args : pipewire_alsa_plugin_c_args, + include_directories : [configinc], + dependencies : [pipewire_dep, alsa_dep], + install : true, + install_dir : join_paths(pipewire_libdir, 'alsa-lib'), +) diff --git a/pipewire-alsa/alsa-plugins/pcm_pipewire.c b/pipewire-alsa/alsa-plugins/pcm_pipewire.c new file mode 100644 index 000000000..8f06dedb8 --- /dev/null +++ b/pipewire-alsa/alsa-plugins/pcm_pipewire.c @@ -0,0 +1,948 @@ +/* + * PCM - PipeWire plugin + * + * Copyright (c) 2017 Wim Taymans + * + * This library is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#define __USE_GNU +#define _GNU_SOURCE + +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include +#include + +#include + +#define MIN_BUFFERS 3u +#define MAX_BUFFERS 64u + +#define MAX_CHANNELS 32 +#define MAX_RATE (48000*8) + +#define MIN_PERIOD 64 + +typedef struct { + snd_pcm_ioplug_t io; + + char *node_name; + uint32_t target; + + int fd; + bool activated; /* PipeWire is activated? */ + bool error; + + unsigned int num_ports; + unsigned int hw_ptr; + unsigned int sample_bits; + snd_pcm_uframes_t min_avail; + + struct pw_loop *loop; + struct pw_thread_loop *main_loop; + + struct pw_core *core; + + struct pw_remote *remote; + struct spa_hook remote_listener; + + uint32_t flags; + struct pw_stream *stream; + struct spa_hook stream_listener; + + struct spa_audio_info_raw format; + +} snd_pcm_pipewire_t; + +static int snd_pcm_pipewire_stop(snd_pcm_ioplug_t *io); + +static int pcm_poll_block_check(snd_pcm_ioplug_t *io) +{ + uint64_t val; + snd_pcm_sframes_t avail; + snd_pcm_pipewire_t *pw = io->private_data; + + if (io->state == SND_PCM_STATE_RUNNING || + (io->state == SND_PCM_STATE_PREPARED && io->stream == SND_PCM_STREAM_CAPTURE)) { + avail = snd_pcm_avail_update(io->pcm); + if (avail >= 0 && avail < (snd_pcm_sframes_t)pw->min_avail) { + read(io->poll_fd, &val, sizeof(val)); + return 1; + } + } + + return 0; +} + +static inline int pcm_poll_unblock_check(snd_pcm_ioplug_t *io) +{ + uint64_t val = 1; + snd_pcm_pipewire_t *pw = io->private_data; + write(pw->fd, &val, sizeof(val)); + return 1; +} + +static void snd_pcm_pipewire_free(snd_pcm_pipewire_t *pw) +{ + if (pw) { + if (pw->main_loop) + pw_thread_loop_stop(pw->main_loop); + if (pw->core) + pw_core_destroy(pw->core); + if (pw->main_loop) + pw_thread_loop_destroy(pw->main_loop); + if (pw->loop) + pw_loop_destroy(pw->loop); + if (pw->fd >= 0) + close(pw->fd); + free(pw); + } +} + +static int snd_pcm_pipewire_close(snd_pcm_ioplug_t *io) +{ + snd_pcm_pipewire_t *pw = io->private_data; + snd_pcm_pipewire_free(pw); + return 0; +} + +static int snd_pcm_pipewire_poll_revents(snd_pcm_ioplug_t *io, + struct pollfd *pfds, unsigned int nfds, + unsigned short *revents) +{ + snd_pcm_pipewire_t *pw = io->private_data; + + assert(pfds && nfds == 1 && revents); + + if (pw->error) + return -EBADFD; + + *revents = pfds[0].revents & ~(POLLIN | POLLOUT); + if (pfds[0].revents & POLLIN && !pcm_poll_block_check(io)) + *revents |= (io->stream == SND_PCM_STREAM_PLAYBACK) ? POLLOUT : POLLIN; + + return 0; +} + +static snd_pcm_sframes_t snd_pcm_pipewire_pointer(snd_pcm_ioplug_t *io) +{ + snd_pcm_pipewire_t *pw = io->private_data; + + if (pw->error) + return -EBADFD; + + return pw->hw_ptr; +} + +static int +snd_pcm_pipewire_process_playback(snd_pcm_pipewire_t *pw, struct pw_buffer *b) +{ + snd_pcm_ioplug_t *io = &pw->io; + const snd_pcm_channel_area_t *areas; + snd_pcm_channel_area_t *pwareas; + snd_pcm_uframes_t xfer = 0; + unsigned int channel, bps, bpf; + snd_pcm_uframes_t nframes; + uint32_t offset, index = 0, nbytes, avail, maxsize; + int32_t filled; + void *ptr; + struct spa_data *d; + + bps = io->channels * pw->sample_bits; + bpf = bps / 8; + + pwareas = alloca(io->channels * sizeof(snd_pcm_channel_area_t)); + + d = b->buffer->datas; + + maxsize = d[0].maxsize; + + filled = 0; + index = 0; + avail = maxsize - filled; + avail = SPA_MIN(avail, pw->min_avail * bpf); + + do { + offset = index % maxsize; + nbytes = SPA_MIN(avail, maxsize - offset); + + ptr = SPA_MEMBER(d[0].data, offset, void); + + nframes = nbytes / bpf; + pw_log_trace("%d %d %lu %d %d %p %d", nbytes, avail, nframes, filled, offset, ptr, io->state); + + for (channel = 0; channel < io->channels; channel++) { + pwareas[channel].addr = ptr; + pwareas[channel].first = channel * pw->sample_bits; + pwareas[channel].step = bps; + } + + if (io->state != SND_PCM_STATE_RUNNING && io->state != SND_PCM_STATE_DRAINING) { + pw_log_trace("silence %lu frames %d", nframes, io->state); + for (channel = 0; channel < io->channels; channel++) + snd_pcm_area_silence(&pwareas[channel], 0, nframes, io->format); + goto done; + } + + areas = snd_pcm_ioplug_mmap_areas(io); + + xfer = 0; + while (xfer < nframes) { + snd_pcm_uframes_t frames = nframes - xfer; + snd_pcm_uframes_t offset = pw->hw_ptr; + snd_pcm_uframes_t cont = io->buffer_size - offset; + + if (cont < frames) + frames = cont; + + snd_pcm_areas_copy(pwareas, xfer, + areas, offset, + io->channels, frames, io->format); + + pw->hw_ptr += frames; + pw->hw_ptr %= io->buffer_size; + xfer += frames; + } + + pcm_poll_unblock_check(io); /* unblock socket for polling if needed */ + + done: + index += nbytes; + avail -= nbytes; + } while (avail > 0); + + d[0].chunk->offset = 0; + d[0].chunk->size = index; + d[0].chunk->stride = 0; + + return 0; +} + +static int +snd_pcm_pipewire_process_record(snd_pcm_pipewire_t *pw, struct pw_buffer *b) +{ + snd_pcm_ioplug_t *io = &pw->io; + const snd_pcm_channel_area_t *areas; + snd_pcm_channel_area_t *pwareas; + snd_pcm_uframes_t xfer = 0; + unsigned int channel, bps, bpf; + snd_pcm_uframes_t nframes; + uint32_t offset, index = 0, nbytes, avail, maxsize; + struct spa_data *d; + void *ptr; + + bps = io->channels * pw->sample_bits; + bpf = bps / 8; + + pwareas = alloca(io->channels * sizeof(snd_pcm_channel_area_t)); + + d = b->buffer->datas; + + maxsize = d[0].chunk->size; + avail = maxsize; + index = d[0].chunk->offset; + + do { + avail = SPA_MIN(avail, pw->min_avail * bpf); + offset = index % maxsize; + nbytes = SPA_MIN(avail, maxsize - offset); + ptr = SPA_MEMBER(d[0].data, offset, void); + + pw_log_trace("%d %d %d %p", nbytes, avail, offset, ptr); + nframes = nbytes / bpf; + + for (channel = 0; channel < io->channels; channel++) { + pwareas[channel].addr = ptr; + pwareas[channel].first = channel * pw->sample_bits; + pwareas[channel].step = bps; + } + + areas = snd_pcm_ioplug_mmap_areas(io); + + xfer = 0; + while (xfer < nframes) { + snd_pcm_uframes_t frames = nframes - xfer; + snd_pcm_uframes_t offset = pw->hw_ptr; + snd_pcm_uframes_t cont = io->buffer_size - offset; + + if (cont < frames) + frames = cont; + + snd_pcm_areas_copy(areas, offset, + pwareas, xfer, + io->channels, frames, io->format); + + pw->hw_ptr += frames; + pw->hw_ptr %= io->buffer_size; + xfer += frames; + } + + pcm_poll_unblock_check(io); /* unblock socket for polling if needed */ + + avail -= nbytes; + index += nbytes; + } while (avail > 0); + + return 0; +} + +static void on_stream_format_changed(void *data, const struct spa_pod *format) +{ + snd_pcm_pipewire_t *pw = data; + snd_pcm_ioplug_t *io = &pw->io; + const struct spa_pod *params[4]; + uint32_t n_params = 0; + uint8_t buffer[4096]; + struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer)); + uint32_t stride = (io->channels * pw->sample_bits) / 8; + uint32_t buffers; + uint32_t size; + + io->period_size = pw->min_avail; + buffers = SPA_CLAMP(io->buffer_size / io->period_size, MIN_BUFFERS, MAX_BUFFERS); + size = io->period_size * stride; + + pw_log_info("buffer_size:%lu period_size:%lu buffers:%u stride:%u size:%u min_avail:%lu", + io->buffer_size, io->period_size, buffers, stride, size, pw->min_avail); + + params[n_params++] = spa_pod_builder_add_object(&b, + SPA_TYPE_OBJECT_ParamBuffers, SPA_PARAM_Buffers, + SPA_PARAM_BUFFERS_buffers, SPA_POD_CHOICE_RANGE_Int(buffers, MIN_BUFFERS, MAX_BUFFERS), + SPA_PARAM_BUFFERS_blocks, SPA_POD_Int(1), + SPA_PARAM_BUFFERS_size, SPA_POD_CHOICE_RANGE_Int(size, size, INT_MAX), + SPA_PARAM_BUFFERS_stride, SPA_POD_Int(stride), + SPA_PARAM_BUFFERS_align, SPA_POD_Int(16)); + + pw_stream_finish_format(pw->stream, 0, params, n_params); +} + +static void on_stream_process(void *data) +{ + snd_pcm_pipewire_t *pw = data; + snd_pcm_ioplug_t *io = &pw->io; + struct pw_buffer *b; + + b = pw_stream_dequeue_buffer(pw->stream); + if (b == NULL) + return; + + if (io->stream == SND_PCM_STREAM_PLAYBACK) + snd_pcm_pipewire_process_playback(pw, b); + else + snd_pcm_pipewire_process_record(pw, b); + + pw_stream_queue_buffer(pw->stream, b); +} + +static const struct pw_stream_events stream_events = { + PW_VERSION_STREAM_EVENTS, + .format_changed = on_stream_format_changed, + .process = on_stream_process, +}; + +static int snd_pcm_pipewire_prepare(snd_pcm_ioplug_t *io) +{ + snd_pcm_pipewire_t *pw = io->private_data; + snd_pcm_sw_params_t *swparams; + const struct spa_pod *params[1]; + uint8_t buffer[1024]; + struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer)); + struct pw_properties *props; + int res; + uint32_t min_period; + + pw_thread_loop_lock(pw->main_loop); + + snd_pcm_sw_params_alloca(&swparams); + if ((res = snd_pcm_sw_params_current(io->pcm, swparams)) == 0) + snd_pcm_sw_params_get_avail_min(swparams, &pw->min_avail); + else + pw->min_avail = io->period_size; + + min_period = (MIN_PERIOD * io->rate / 48000); + pw->min_avail = SPA_MAX(pw->min_avail, min_period); + + pw_log_debug("prepare %d %p %lu %ld", pw->error, pw->stream, io->period_size, pw->min_avail); + if (!pw->error && pw->stream != NULL) + goto done; + + if (pw->stream != NULL) { + pw_stream_destroy(pw->stream); + pw->stream = NULL; + } + + props = pw_properties_new(PW_KEY_CLIENT_API, "alsa", NULL); + + pw_properties_setf(props, PW_KEY_NODE_LATENCY, "%lu/%u", pw->min_avail, io->rate); + pw_properties_set(props, PW_KEY_MEDIA_TYPE, "Audio"); + pw_properties_set(props, PW_KEY_MEDIA_CATEGORY, + io->stream == SND_PCM_STREAM_PLAYBACK ? + "Playback" : "Capture"); + pw_properties_set(props, PW_KEY_MEDIA_ROLE, "Music"); + + pw->stream = pw_stream_new(pw->remote, pw->node_name, props); + if (pw->stream == NULL) + goto error; + + pw_stream_add_listener(pw->stream, &pw->stream_listener, &stream_events, pw); + + params[0] = spa_format_audio_raw_build(&b, SPA_PARAM_EnumFormat, &pw->format); + pw->error = false; + + pw_stream_connect(pw->stream, + io->stream == SND_PCM_STREAM_PLAYBACK ? + PW_DIRECTION_OUTPUT : + PW_DIRECTION_INPUT, + pw->target, + pw->flags | + PW_STREAM_FLAG_AUTOCONNECT | + PW_STREAM_FLAG_MAP_BUFFERS | + PW_STREAM_FLAG_RT_PROCESS, + params, 1); + +done: + pw->hw_ptr = 0; + + pw_thread_loop_unlock(pw->main_loop); + + return 0; + + error: + pw_thread_loop_unlock(pw->main_loop); + return -ENOMEM; +} + +static int snd_pcm_pipewire_start(snd_pcm_ioplug_t *io) +{ + snd_pcm_pipewire_t *pw = io->private_data; + + pw_thread_loop_lock(pw->main_loop); + if (!pw->activated && pw->stream != NULL) { + pw_stream_set_active(pw->stream, true); + pw->activated = true; + } + pw_thread_loop_unlock(pw->main_loop); + return 0; +} + +static int snd_pcm_pipewire_stop(snd_pcm_ioplug_t *io) +{ + snd_pcm_pipewire_t *pw = io->private_data; + + pw_thread_loop_lock(pw->main_loop); + if (pw->activated && pw->stream != NULL) { + pw_stream_set_active(pw->stream, false); + pw->activated = false; + } + pw_thread_loop_unlock(pw->main_loop); + return 0; +} + +#if __BYTE_ORDER == __BIG_ENDIAN +#define _FORMAT_LE(p, fmt) p ? SPA_AUDIO_FORMAT_UNKNOWN : SPA_AUDIO_FORMAT_ ## fmt ## _OE +#define _FORMAT_BE(p, fmt) p ? SPA_AUDIO_FORMAT_ ## fmt ## P : SPA_AUDIO_FORMAT_ ## fmt +#elif __BYTE_ORDER == __LITTLE_ENDIAN +#define _FORMAT_LE(p, fmt) p ? SPA_AUDIO_FORMAT_ ## fmt ## P : SPA_AUDIO_FORMAT_ ## fmt +#define _FORMAT_BE(p, fmt) p ? SPA_AUDIO_FORMAT_UNKNOWN : SPA_AUDIO_FORMAT_ ## fmt ## _OE +#endif + +static int set_default_channels(struct spa_audio_info_raw *info) +{ + switch (info->channels) { + case 7: + info->position[5] = SPA_AUDIO_CHANNEL_SL; + info->position[6] = SPA_AUDIO_CHANNEL_SR; + /* Fall through */ + case 5: + info->position[3] = SPA_AUDIO_CHANNEL_RL; + info->position[4] = SPA_AUDIO_CHANNEL_RR; + info->position[2] = SPA_AUDIO_CHANNEL_FC; + info->position[0] = SPA_AUDIO_CHANNEL_FL; + info->position[1] = SPA_AUDIO_CHANNEL_FR; + return 1; + case 8: + info->position[6] = SPA_AUDIO_CHANNEL_SL; + info->position[7] = SPA_AUDIO_CHANNEL_SR; + /* Fall through */ + case 6: + info->position[4] = SPA_AUDIO_CHANNEL_RL; + info->position[5] = SPA_AUDIO_CHANNEL_RR; + /* Fall through */ + case 4: + info->position[3] = SPA_AUDIO_CHANNEL_LFE; + /* Fall through */ + case 3: + info->position[2] = SPA_AUDIO_CHANNEL_FC; + /* Fall through */ + case 2: + info->position[0] = SPA_AUDIO_CHANNEL_FL; + info->position[1] = SPA_AUDIO_CHANNEL_FR; + return 1; + case 1: + info->position[0] = SPA_AUDIO_CHANNEL_MONO; + return 1; + default: + return 0; + } +} + +static int snd_pcm_pipewire_hw_params(snd_pcm_ioplug_t * io, + snd_pcm_hw_params_t * params) +{ + snd_pcm_pipewire_t *pw = io->private_data; + bool planar; + + pw_log_debug("hw_params %lu %lu", io->buffer_size, io->period_size); + + switch(io->access) { + case SND_PCM_ACCESS_MMAP_INTERLEAVED: + case SND_PCM_ACCESS_RW_INTERLEAVED: + planar = false; + break; + case SND_PCM_ACCESS_MMAP_NONINTERLEAVED: + case SND_PCM_ACCESS_RW_NONINTERLEAVED: + planar = true; + break; + default: + SNDERR("PipeWire: invalid access: %d\n", io->access); + return -EINVAL; + } + + switch(io->format) { + case SND_PCM_FORMAT_U8: + pw->format.format = planar ? SPA_AUDIO_FORMAT_U8P : SPA_AUDIO_FORMAT_U8; + break; + case SND_PCM_FORMAT_S16_LE: + pw->format.format = _FORMAT_LE(planar, S16); + break; + case SND_PCM_FORMAT_S16_BE: + pw->format.format = _FORMAT_BE(planar, S16); + break; + case SND_PCM_FORMAT_S24_LE: + pw->format.format = _FORMAT_LE(planar, S24_32); + break; + case SND_PCM_FORMAT_S24_BE: + pw->format.format = _FORMAT_BE(planar, S24_32); + break; + case SND_PCM_FORMAT_S32_LE: + pw->format.format = _FORMAT_LE(planar, S32); + break; + case SND_PCM_FORMAT_S32_BE: + pw->format.format = _FORMAT_BE(planar, S32); + break; + case SND_PCM_FORMAT_S24_3LE: + pw->format.format = _FORMAT_LE(planar, S24); + break; + case SND_PCM_FORMAT_S24_3BE: + pw->format.format = _FORMAT_BE(planar, S24); + break; + case SND_PCM_FORMAT_FLOAT_LE: + pw->format.format = _FORMAT_LE(planar, F32); + break; + case SND_PCM_FORMAT_FLOAT_BE: + pw->format.format = _FORMAT_BE(planar, F32); + break; + default: + SNDERR("PipeWire: invalid format: %d\n", io->format); + return -EINVAL; + } + pw->format.channels = io->channels; + pw->format.rate = io->rate; + + set_default_channels(&pw->format); + + pw->sample_bits = snd_pcm_format_physical_width(io->format); + + return 0; +} + +struct chmap_info { + enum snd_pcm_chmap_position pos; + enum spa_audio_channel channel; +}; + +static const struct chmap_info chmap_info[] = { + [SND_CHMAP_UNKNOWN] = { SND_CHMAP_UNKNOWN, SPA_AUDIO_CHANNEL_UNKNOWN }, + [SND_CHMAP_NA] = { SND_CHMAP_NA, SPA_AUDIO_CHANNEL_NA }, + [SND_CHMAP_MONO] = { SND_CHMAP_MONO, SPA_AUDIO_CHANNEL_MONO }, + [SND_CHMAP_FL] = { SND_CHMAP_FL, SPA_AUDIO_CHANNEL_FL }, + [SND_CHMAP_FR] = { SND_CHMAP_FR, SPA_AUDIO_CHANNEL_FR }, + [SND_CHMAP_RL] = { SND_CHMAP_RL, SPA_AUDIO_CHANNEL_RL }, + [SND_CHMAP_RR] = { SND_CHMAP_RR, SPA_AUDIO_CHANNEL_RR }, + [SND_CHMAP_FC] = { SND_CHMAP_FC, SPA_AUDIO_CHANNEL_FC }, + [SND_CHMAP_LFE] = { SND_CHMAP_LFE, SPA_AUDIO_CHANNEL_LFE }, + [SND_CHMAP_SL] = { SND_CHMAP_SL, SPA_AUDIO_CHANNEL_SL }, + [SND_CHMAP_SR] = { SND_CHMAP_SR, SPA_AUDIO_CHANNEL_SR }, + [SND_CHMAP_RC] = { SND_CHMAP_RC, SPA_AUDIO_CHANNEL_RC }, + [SND_CHMAP_FLC] = { SND_CHMAP_FLC, SPA_AUDIO_CHANNEL_FLC }, + [SND_CHMAP_FRC] = { SND_CHMAP_FRC, SPA_AUDIO_CHANNEL_FRC }, + [SND_CHMAP_RLC] = { SND_CHMAP_RLC, SPA_AUDIO_CHANNEL_RLC }, + [SND_CHMAP_RRC] = { SND_CHMAP_RRC, SPA_AUDIO_CHANNEL_RRC }, + [SND_CHMAP_FLW] = { SND_CHMAP_FLW, SPA_AUDIO_CHANNEL_FLW }, + [SND_CHMAP_FRW] = { SND_CHMAP_FRW, SPA_AUDIO_CHANNEL_FRW }, + [SND_CHMAP_FLH] = { SND_CHMAP_FLH, SPA_AUDIO_CHANNEL_FLH }, + [SND_CHMAP_FCH] = { SND_CHMAP_FCH, SPA_AUDIO_CHANNEL_FCH }, + [SND_CHMAP_FRH] = { SND_CHMAP_FRH, SPA_AUDIO_CHANNEL_FRH }, + [SND_CHMAP_TC] = { SND_CHMAP_TC, SPA_AUDIO_CHANNEL_TC }, + [SND_CHMAP_TFL] = { SND_CHMAP_TFL, SPA_AUDIO_CHANNEL_TFL }, + [SND_CHMAP_TFR] = { SND_CHMAP_TFR, SPA_AUDIO_CHANNEL_TFR }, + [SND_CHMAP_TFC] = { SND_CHMAP_TFC, SPA_AUDIO_CHANNEL_TFC }, + [SND_CHMAP_TRL] = { SND_CHMAP_TRL, SPA_AUDIO_CHANNEL_TRL }, + [SND_CHMAP_TRR] = { SND_CHMAP_TRR, SPA_AUDIO_CHANNEL_TRR }, + [SND_CHMAP_TRC] = { SND_CHMAP_TRC, SPA_AUDIO_CHANNEL_TRC }, + [SND_CHMAP_TFLC] = { SND_CHMAP_TFLC, SPA_AUDIO_CHANNEL_TFLC }, + [SND_CHMAP_TFRC] = { SND_CHMAP_TFRC, SPA_AUDIO_CHANNEL_TFRC }, + [SND_CHMAP_TSL] = { SND_CHMAP_TSL, SPA_AUDIO_CHANNEL_TSL }, + [SND_CHMAP_TSR] = { SND_CHMAP_TSR, SPA_AUDIO_CHANNEL_TSR }, + [SND_CHMAP_LLFE] = { SND_CHMAP_LLFE, SPA_AUDIO_CHANNEL_LLFE }, + [SND_CHMAP_RLFE] = { SND_CHMAP_RLFE, SPA_AUDIO_CHANNEL_RLFE }, + [SND_CHMAP_BC] = { SND_CHMAP_BC, SPA_AUDIO_CHANNEL_BC }, + [SND_CHMAP_BLC] = { SND_CHMAP_BLC, SPA_AUDIO_CHANNEL_BLC }, + [SND_CHMAP_BRC] = { SND_CHMAP_BRC, SPA_AUDIO_CHANNEL_BRC }, +}; + +static enum snd_pcm_chmap_position channel_to_chmap(enum spa_audio_channel channel) +{ + uint32_t i; + for (i = 0; i < SPA_N_ELEMENTS(chmap_info); i++) + if (chmap_info[i].channel == channel) + return chmap_info[i].pos; + return SND_CHMAP_UNKNOWN; +} + +static int snd_pcm_pipewire_set_chmap(snd_pcm_ioplug_t * io, + const snd_pcm_chmap_t * map) +{ + return 1; +} + +static snd_pcm_chmap_t * snd_pcm_pipewire_get_chmap(snd_pcm_ioplug_t * io) +{ + snd_pcm_pipewire_t *pw = io->private_data; + snd_pcm_chmap_t *map; + uint32_t i; + + map = calloc(1, sizeof(snd_pcm_chmap_t) + + pw->format.channels * sizeof(unsigned int)); + map->channels = pw->format.channels; + for (i = 0; i < pw->format.channels; i++) + map->pos[i] = channel_to_chmap(pw->format.position[i]); + + return map; +} + +static void make_map(snd_pcm_chmap_query_t **maps, int index, int channels, ...) +{ + va_list args; + int i; + + maps[index] = malloc(sizeof(snd_pcm_chmap_query_t) + (channels * sizeof(unsigned int))); + maps[index]->type = SND_CHMAP_TYPE_FIXED; + maps[index]->map.channels = channels; + va_start(args, channels); + for (i = 0; i < channels; i++) + maps[index]->map.pos[i] = va_arg(args, int); + va_end(args); +} + +static snd_pcm_chmap_query_t **snd_pcm_pipewire_query_chmaps(snd_pcm_ioplug_t *io) +{ + snd_pcm_chmap_query_t **maps; + + maps = calloc(9, sizeof(*maps)); + make_map(maps, 0, 1, SND_CHMAP_MONO); + make_map(maps, 1, 2, SND_CHMAP_FL, SND_CHMAP_FR); + make_map(maps, 2, 3, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_FC); + make_map(maps, 3, 4, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_FC, SND_CHMAP_LFE); + make_map(maps, 4, 5, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_FC, SND_CHMAP_RL, SND_CHMAP_RR); + make_map(maps, 5, 6, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_FC, SND_CHMAP_LFE, SND_CHMAP_RL, SND_CHMAP_RR); + make_map(maps, 6, 7, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_FC, + SND_CHMAP_SL, SND_CHMAP_SR, SND_CHMAP_RL, SND_CHMAP_RR); + make_map(maps, 7, 8, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_FC, SND_CHMAP_LFE, + SND_CHMAP_SL, SND_CHMAP_SR, SND_CHMAP_RL, SND_CHMAP_RR); + + return maps; +} + +static snd_pcm_ioplug_callback_t pipewire_pcm_callback = { + .close = snd_pcm_pipewire_close, + .start = snd_pcm_pipewire_start, + .stop = snd_pcm_pipewire_stop, + .pointer = snd_pcm_pipewire_pointer, + .prepare = snd_pcm_pipewire_prepare, + .poll_revents = snd_pcm_pipewire_poll_revents, + .hw_params = snd_pcm_pipewire_hw_params, + .set_chmap = snd_pcm_pipewire_set_chmap, + .get_chmap = snd_pcm_pipewire_get_chmap, + .query_chmaps = snd_pcm_pipewire_query_chmaps, +}; + +static int pipewire_set_hw_constraint(snd_pcm_pipewire_t *pw) +{ + unsigned int access_list[] = { + SND_PCM_ACCESS_MMAP_INTERLEAVED, + SND_PCM_ACCESS_MMAP_NONINTERLEAVED, + SND_PCM_ACCESS_RW_INTERLEAVED, + SND_PCM_ACCESS_RW_NONINTERLEAVED + }; + unsigned int format_list[] = { + SND_PCM_FORMAT_FLOAT_LE, + SND_PCM_FORMAT_FLOAT_BE, + SND_PCM_FORMAT_S32_LE, + SND_PCM_FORMAT_S32_BE, + SND_PCM_FORMAT_S16_LE, + SND_PCM_FORMAT_S16_BE, + SND_PCM_FORMAT_S24_LE, + SND_PCM_FORMAT_S24_BE, + SND_PCM_FORMAT_S24_3LE, + SND_PCM_FORMAT_S24_3BE, + SND_PCM_FORMAT_U8, + }; + + int err; + + if ((err = snd_pcm_ioplug_set_param_list(&pw->io, SND_PCM_IOPLUG_HW_ACCESS, + SPA_N_ELEMENTS(access_list), access_list)) < 0 || + (err = snd_pcm_ioplug_set_param_list(&pw->io, SND_PCM_IOPLUG_HW_FORMAT, + SPA_N_ELEMENTS(format_list), format_list)) < 0 || + (err = snd_pcm_ioplug_set_param_minmax(&pw->io, SND_PCM_IOPLUG_HW_CHANNELS, + 1, MAX_CHANNELS)) < 0 || + (err = snd_pcm_ioplug_set_param_minmax(&pw->io, SND_PCM_IOPLUG_HW_RATE, + 1, MAX_RATE)) < 0 || + (err = snd_pcm_ioplug_set_param_minmax(&pw->io, SND_PCM_IOPLUG_HW_BUFFER_BYTES, + 16*1024, 4*1024*1024)) < 0 || + (err = snd_pcm_ioplug_set_param_minmax(&pw->io, SND_PCM_IOPLUG_HW_PERIOD_BYTES, + 128, 2*1024*1024)) < 0 || + (err = snd_pcm_ioplug_set_param_minmax(&pw->io, SND_PCM_IOPLUG_HW_PERIODS, + 3, 64)) < 0) + return err; + + return 0; +} + +static void on_remote_state_changed(void *data, enum pw_remote_state old, + enum pw_remote_state state, const char *error) +{ + snd_pcm_pipewire_t *pw = data; + + switch (state) { + case PW_REMOTE_STATE_ERROR: + pw_log_error("error %s", error); + /* fallthrough */ + case PW_REMOTE_STATE_UNCONNECTED: + pw->error = true; + if (pw->fd != -1) + pcm_poll_unblock_check(&pw->io); + /* fallthrough */ + case PW_REMOTE_STATE_CONNECTED: + pw_thread_loop_signal(pw->main_loop, false); + break; + default: + break; + } +} + +static const struct pw_remote_events remote_events = { + PW_VERSION_REMOTE_EVENTS, + .state_changed = on_remote_state_changed, +}; + +static int remote_connect_sync(snd_pcm_pipewire_t *pw) +{ + const char *error = NULL; + enum pw_remote_state state; + int res; + + pw_thread_loop_lock(pw->main_loop); + + if ((res = pw_remote_connect(pw->remote)) < 0) { + error = spa_strerror(res); + goto error; + } + + while (true) { + state = pw_remote_get_state(pw->remote, &error); + if (state == PW_REMOTE_STATE_ERROR) + goto error; + + if (state == PW_REMOTE_STATE_CONNECTED) + break; + + pw_thread_loop_wait(pw->main_loop); + } + exit: + pw_thread_loop_unlock(pw->main_loop); + + return res; + + error: + SNDERR("PipeWire: Unable to connect: %s\n", error); + goto exit; +} + +static int snd_pcm_pipewire_open(snd_pcm_t **pcmp, const char *name, + const char *node_name, + const char *playback_node, + const char *capture_node, + snd_pcm_stream_t stream, + int mode, + uint32_t flags) +{ + snd_pcm_pipewire_t *pw; + int err; + const char *str; + struct pw_properties *props; + + assert(pcmp); + pw = calloc(1, sizeof(*pw)); + if (!pw) + return -ENOMEM; + + str = getenv("PIPEWIRE_NODE"); + + pw_log_debug("open %s %d %d %08x '%s'", name, stream, mode, flags, str); + + pw->fd = -1; + pw->io.poll_fd = -1; + pw->flags = flags; + + if (node_name == NULL) + err = asprintf(&pw->node_name, "ALSA %s", + stream == SND_PCM_STREAM_PLAYBACK ? "Playback" : "Capture"); + else + pw->node_name = strdup(node_name); + + pw->target = SPA_ID_INVALID; + if (str != NULL) + pw->target = atoi(str); + else { + if (stream == SND_PCM_STREAM_PLAYBACK) + pw->target = playback_node ? (uint32_t)atoi(playback_node) : SPA_ID_INVALID; + else + pw->target = capture_node ? (uint32_t)atoi(capture_node) : SPA_ID_INVALID; + } + + pw->loop = pw_loop_new(NULL); + pw->main_loop = pw_thread_loop_new(pw->loop, "alsa-pipewire"); + pw->core = pw_core_new(pw->loop, NULL, 0); + + props = pw_properties_new(NULL, NULL); + str = pw_get_prgname(); + if (str) + pw_properties_setf(props, PW_KEY_APP_NAME, "ALSA plug-in [%s]", str); + else + pw_properties_set(props, PW_KEY_APP_NAME, "ALSA plug-in"); + + pw->remote = pw_remote_new(pw->core, props, 0); + pw_remote_add_listener(pw->remote, &pw->remote_listener, &remote_events, pw); + + if ((err = pw_thread_loop_start(pw->main_loop)) < 0) + goto error; + + if ((err = remote_connect_sync(pw)) < 0) + goto error; + + pw->fd = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK); + + pw->io.version = SND_PCM_IOPLUG_VERSION; + pw->io.name = "ALSA <-> PipeWire PCM I/O Plugin"; + pw->io.callback = &pipewire_pcm_callback; + pw->io.private_data = pw; + pw->io.poll_fd = pw->fd; + pw->io.poll_events = POLLIN; + pw->io.mmap_rw = 1; + + if ((err = snd_pcm_ioplug_create(&pw->io, name, stream, mode)) < 0) + goto error; + + pw_log_debug("open %s %d %d", name, pw->io.stream, mode); + + if ((err = pipewire_set_hw_constraint(pw)) < 0) + goto error; + + *pcmp = pw->io.pcm; + + return 0; + + error: + snd_pcm_pipewire_free(pw); + return err; +} + + +SPA_EXPORT +SND_PCM_PLUGIN_DEFINE_FUNC(pipewire) +{ + snd_config_iterator_t i, next; + const char *node_name = NULL; + const char *server_name = NULL; + const char *playback_node = NULL; + const char *capture_node = NULL; + uint32_t flags = 0; + int err; + + pw_init(NULL, NULL); + + snd_config_for_each(i, next, conf) { + snd_config_t *n = snd_config_iterator_entry(i); + const char *id; + if (snd_config_get_id(n, &id) < 0) + continue; + if (strcmp(id, "comment") == 0 || strcmp(id, "type") == 0 || strcmp(id, "hint") == 0) + continue; + if (strcmp(id, "name") == 0) { + snd_config_get_string(n, &node_name); + continue; + } + if (strcmp(id, "server") == 0) { + snd_config_get_string(n, &server_name); + continue; + } + if (strcmp(id, "playback_node") == 0) { + snd_config_get_string(n, &playback_node); + continue; + } + if (strcmp(id, "capture_node") == 0) { + snd_config_get_string(n, &capture_node); + continue; + } + if (strcmp(id, "exclusive") == 0) { + if (snd_config_get_bool(n)) + flags |= PW_STREAM_FLAG_EXCLUSIVE; + continue; + } + SNDERR("Unknown field %s", id); + return -EINVAL; + } + + err = snd_pcm_pipewire_open(pcmp, name, node_name, playback_node, capture_node, stream, mode, flags); + + return err; +} + +SPA_EXPORT +SND_PCM_PLUGIN_SYMBOL(pipewire); diff --git a/pipewire-alsa/conf/50-pipewire.conf b/pipewire-alsa/conf/50-pipewire.conf new file mode 100644 index 000000000..e96d9a792 --- /dev/null +++ b/pipewire-alsa/conf/50-pipewire.conf @@ -0,0 +1,52 @@ +# Add a specific named PipeWire pcm + +defaults.pipewire.server "pipewire-0" +defaults.pipewire.node "-1" +defaults.pipewire.exclusive false + +pcm.pipewire { + @args [ SERVER NODE EXCLUSIVE ] + @args.SERVER { + type string + default { + @func refer + name defaults.pipewire.server + } + } + @args.NODE { + type string + default { + @func refer + name defaults.pipewire.node + } + } + @args.EXCLUSIVE { + type integer + default { + @func refer + name defaults.pipewire.exclusive + } + } + + + type pipewire + server $SERVER + playback_node $NODE + capture_node $NODE + exclusive $EXCLUSIVE + hint { + show on + description "PipeWire Sound Server" + } +} + +pcm.!default { + type pipewire + playback_node "-1" + capture_node "-1" + hint { + show on + description "Default ALSA Output (currently PipeWire Media Server)" + } + #fallback "sysdefault" +}