diff options
Diffstat (limited to 'pipewire-alsa/alsa-plugins/pcm_pipewire.c')
| -rw-r--r-- | pipewire-alsa/alsa-plugins/pcm_pipewire.c | 1333 |
1 files changed, 1333 insertions, 0 deletions
diff --git a/pipewire-alsa/alsa-plugins/pcm_pipewire.c b/pipewire-alsa/alsa-plugins/pcm_pipewire.c new file mode 100644 index 0000000..dc0cd81 --- /dev/null +++ b/pipewire-alsa/alsa-plugins/pcm_pipewire.c @@ -0,0 +1,1333 @@ +/* PCM - PipeWire plugin + * + * Copyright © 2017 Wim Taymans + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#define __USE_GNU + +#include <limits.h> +#if !defined(__FreeBSD__) && !defined(__MidnightBSD__) +#include <byteswap.h> +#endif +#include <sys/shm.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/mman.h> + +#include <alsa/asoundlib.h> +#include <alsa/pcm_external.h> + +#include <spa/param/audio/format-utils.h> +#include <spa/debug/types.h> +#include <spa/param/props.h> +#include <spa/utils/result.h> +#include <spa/utils/string.h> + +#include <pipewire/pipewire.h> + +#define ATOMIC_INC(s) __atomic_add_fetch(&(s), 1, __ATOMIC_SEQ_CST) +#define ATOMIC_LOAD(s) __atomic_load_n(&(s), __ATOMIC_SEQ_CST) + +#define SEQ_WRITE(s) ATOMIC_INC(s) +#define SEQ_WRITE_SUCCESS(s1,s2) ((s1) + 1 == (s2) && ((s2) & 1) == 0) + +#define SEQ_READ(s) ATOMIC_LOAD(s) +#define SEQ_READ_SUCCESS(s1,s2) ((s1) == (s2) && ((s2) & 1) == 0) + +PW_LOG_TOPIC_STATIC(alsa_log_topic, "alsa.pcm"); +#define PW_LOG_TOPIC_DEFAULT alsa_log_topic + +#define MIN_BUFFERS 2u +#define MAX_BUFFERS 64u + +#define MAX_CHANNELS 64 +#define MAX_RATE (48000*8) + +#define MIN_PERIOD 64 + +#define MIN_PERIOD_BYTES (128) +#define MAX_PERIOD_BYTES (2*1024*1024) + +#define MIN_BUFFER_BYTES (2*MIN_PERIOD_BYTES) +#define MAX_BUFFER_BYTES (2*MAX_PERIOD_BYTES) + +typedef struct { + snd_pcm_ioplug_t io; + + snd_output_t *output; + FILE *log_file; + + int fd; + int error; + unsigned int activated:1; /* PipeWire is activated? */ + unsigned int drained:1; + unsigned int draining:1; + unsigned int xrun_detected:1; + unsigned int hw_params_changed:1; + unsigned int active:1; + + snd_pcm_uframes_t hw_ptr; + snd_pcm_uframes_t boundary; + snd_pcm_uframes_t min_avail; + unsigned int sample_bits; + uint32_t blocks; + uint32_t stride; + + struct spa_system *system; + struct pw_thread_loop *main_loop; + + struct pw_properties *props; + struct pw_context *context; + + struct pw_core *core; + struct spa_hook core_listener; + + struct pw_stream *stream; + struct spa_hook stream_listener; + + int64_t delay; + uint64_t transfered; + uint64_t buffered; + int64_t now; + uintptr_t seq; + + struct spa_audio_info_raw format; +} snd_pcm_pipewire_t; + +static int snd_pcm_pipewire_stop(snd_pcm_ioplug_t *io); + +static int check_active(snd_pcm_ioplug_t *io) +{ + snd_pcm_pipewire_t *pw = io->private_data; + snd_pcm_sframes_t avail; + bool active; + + avail = snd_pcm_ioplug_avail(io, pw->hw_ptr, io->appl_ptr); + + if (io->state == SND_PCM_STATE_DRAINING) { + active = pw->drained; + } + else if (avail >= 0 && avail < (snd_pcm_sframes_t)pw->min_avail) { + active = false; + } + else if (avail >= (snd_pcm_sframes_t)pw->min_avail) { + active = true; + } else { + active = false; + } + if (pw->active != active) { + pw_log_trace("%p: avail:%lu min-avail:%lu state:%s hw:%lu appl:%lu active:%d->%d state:%s", + pw, avail, pw->min_avail, snd_pcm_state_name(io->state), + pw->hw_ptr, io->appl_ptr, pw->active, active, + snd_pcm_state_name(io->state)); + } + return active; +} + + +static int update_active(snd_pcm_ioplug_t *io) +{ + snd_pcm_pipewire_t *pw = io->private_data; + pw->active = check_active(io); + uint64_t val; + + if (pw->active || pw->error < 0) + spa_system_eventfd_write(pw->system, io->poll_fd, 1); + else + spa_system_eventfd_read(pw->system, io->poll_fd, &val); + + return pw->active; +} + +static void snd_pcm_pipewire_free(snd_pcm_pipewire_t *pw) +{ + if (pw == NULL) + return; + + pw_log_debug("%p: free", pw); + if (pw->main_loop) + pw_thread_loop_stop(pw->main_loop); + if (pw->stream) + pw_stream_destroy(pw->stream); + if (pw->context) + pw_context_destroy(pw->context); + if (pw->fd >= 0) + spa_system_close(pw->system, pw->fd); + if (pw->main_loop) + pw_thread_loop_destroy(pw->main_loop); + pw_properties_free(pw->props); + snd_output_close(pw->output); + fclose(pw->log_file); + free(pw); +} + +static int snd_pcm_pipewire_close(snd_pcm_ioplug_t *io) +{ + snd_pcm_pipewire_t *pw = io->private_data; + pw_log_debug("%p: close", pw); + snd_pcm_pipewire_free(pw); + return 0; +} + +static int snd_pcm_pipewire_poll_descriptors(snd_pcm_ioplug_t *io, struct pollfd *pfds, unsigned int space) +{ + snd_pcm_pipewire_t *pw = io->private_data; + update_active(io); + pfds->fd = pw->fd; + pfds->events = POLLIN | POLLERR | POLLNVAL; + return 1; +} + +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 < 0) + return pw->error; + + *revents = pfds[0].revents & ~(POLLIN | POLLOUT); + if (pfds[0].revents & POLLIN && check_active(io)) { + *revents |= (io->stream == SND_PCM_STREAM_PLAYBACK) ? POLLOUT : POLLIN; + update_active(io); + } + + 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->xrun_detected) + return -EPIPE; + if (pw->error < 0) + return pw->error; + if (io->buffer_size == 0) + return 0; +#ifdef SND_PCM_IOPLUG_FLAG_BOUNDARY_WA + return pw->hw_ptr; +#else + return pw->hw_ptr % io->buffer_size; +#endif +} + +static int snd_pcm_pipewire_delay(snd_pcm_ioplug_t *io, snd_pcm_sframes_t *delayp) +{ + snd_pcm_pipewire_t *pw = io->private_data; + uintptr_t seq1, seq2; + int64_t elapsed = 0, delay, now, avail; + struct timespec ts; + int64_t diff; + + do { + seq1 = SEQ_READ(pw->seq); + + delay = pw->delay + pw->transfered; + now = pw->now; + if (io->stream == SND_PCM_STREAM_PLAYBACK) + avail = snd_pcm_ioplug_hw_avail(io, pw->hw_ptr, io->appl_ptr); + else + avail = snd_pcm_ioplug_avail(io, pw->hw_ptr, io->appl_ptr); + + seq2 = SEQ_READ(pw->seq); + } while (!SEQ_READ_SUCCESS(seq1, seq2)); + + if (now != 0 && (io->state == SND_PCM_STATE_RUNNING || + io->state == SND_PCM_STATE_DRAINING)) { + clock_gettime(CLOCK_MONOTONIC, &ts); + diff = SPA_TIMESPEC_TO_NSEC(&ts) - now; + elapsed = (io->rate * diff) / SPA_NSEC_PER_SEC; + + if (io->stream == SND_PCM_STREAM_PLAYBACK) + delay -= SPA_MIN(elapsed, delay); + else + delay += SPA_MIN(elapsed, (int64_t)io->buffer_size); + } + + *delayp = delay + avail; + + pw_log_trace("avail:%"PRIi64" filled %"PRIi64" elapsed:%"PRIi64" delay:%ld hw:%lu appl:%lu", + avail, delay, elapsed, *delayp, pw->hw_ptr, io->appl_ptr); + + return 0; +} + +static snd_pcm_uframes_t +snd_pcm_pipewire_process(snd_pcm_pipewire_t *pw, struct pw_buffer *b, + snd_pcm_uframes_t *hw_avail,snd_pcm_uframes_t want) +{ + snd_pcm_ioplug_t *io = &pw->io; + snd_pcm_channel_area_t *pwareas; + snd_pcm_uframes_t xfer = 0; + snd_pcm_uframes_t nframes; + unsigned int channel; + struct spa_data *d; + void *ptr; + uint32_t bl, offset, size; + + d = b->buffer->datas; + pwareas = alloca(io->channels * sizeof(snd_pcm_channel_area_t)); + + for (bl = 0; bl < pw->blocks; bl++) { + if (io->stream == SND_PCM_STREAM_PLAYBACK) { + size = SPA_MIN(d[bl].maxsize, pw->min_avail * pw->stride); + } else { + offset = SPA_MIN(d[bl].chunk->offset, d[bl].maxsize); + size = SPA_MIN(d[bl].chunk->size, d[bl].maxsize - offset); + } + want = SPA_MIN(want, size / pw->stride); + } + nframes = SPA_MIN(want, *hw_avail); + + if (pw->blocks == 1) { + if (io->stream == SND_PCM_STREAM_PLAYBACK) { + d[0].chunk->size = want * pw->stride; + d[0].chunk->offset = offset = 0; + } else { + offset = SPA_MIN(d[0].chunk->offset, d[0].maxsize); + } + ptr = SPA_PTROFF(d[0].data, offset, void); + for (channel = 0; channel < io->channels; channel++) { + pwareas[channel].addr = ptr; + pwareas[channel].first = channel * pw->sample_bits; + pwareas[channel].step = io->channels * pw->sample_bits; + } + } else { + for (channel = 0; channel < io->channels; channel++) { + if (io->stream == SND_PCM_STREAM_PLAYBACK) { + d[channel].chunk->size = want * pw->stride; + d[channel].chunk->offset = offset = 0; + } else { + offset = SPA_MIN(d[channel].chunk->offset, d[channel].maxsize); + } + ptr = SPA_PTROFF(d[channel].data, offset, void); + pwareas[channel].addr = ptr; + pwareas[channel].first = 0; + pwareas[channel].step = pw->sample_bits; + } + } + + if (io->state == SND_PCM_STATE_RUNNING || + io->state == SND_PCM_STATE_DRAINING) { + snd_pcm_uframes_t hw_ptr = pw->hw_ptr; + xfer = nframes; + if (xfer > 0) { + const snd_pcm_channel_area_t *areas = snd_pcm_ioplug_mmap_areas(io); + const snd_pcm_uframes_t offset = hw_ptr % io->buffer_size; + + if (io->stream == SND_PCM_STREAM_PLAYBACK) + snd_pcm_areas_copy_wrap(pwareas, 0, nframes, + areas, offset, + io->buffer_size, + io->channels, xfer, + io->format); + else + snd_pcm_areas_copy_wrap(areas, offset, + io->buffer_size, + pwareas, 0, nframes, + io->channels, xfer, + io->format); + + hw_ptr += xfer; + if (hw_ptr >= pw->boundary) + hw_ptr -= pw->boundary; + pw->hw_ptr = hw_ptr; + *hw_avail -= xfer; + } + } + /* check if requested frames were copied */ + if (xfer < want) { + /* always fill the not yet written PipeWire buffer with silence */ + if (io->stream == SND_PCM_STREAM_PLAYBACK) { + const snd_pcm_uframes_t frames = want - xfer; + + snd_pcm_areas_silence(pwareas, xfer, io->channels, + frames, io->format); + xfer += frames; + } + if (io->state == SND_PCM_STATE_RUNNING || + io->state == SND_PCM_STATE_DRAINING) { + /* report Xrun to user application */ + pw->xrun_detected = true; + } + } + return xfer; +} + +static void on_stream_param_changed(void *data, uint32_t id, const struct spa_pod *param) +{ + 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 buffers, size; + + if (param == NULL || id != SPA_PARAM_Format) + return; + + io->period_size = pw->min_avail; + + buffers = SPA_CLAMP(io->buffer_size / io->period_size, MIN_BUFFERS, MAX_BUFFERS); + size = io->period_size * pw->stride; + + pw_log_info("%p: buffer_size:%lu period_size:%lu buffers:%u size:%u min_avail:%lu", + pw, io->buffer_size, io->period_size, buffers, 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(pw->blocks), + SPA_PARAM_BUFFERS_size, SPA_POD_CHOICE_RANGE_Int(size, size, INT_MAX), + SPA_PARAM_BUFFERS_stride, SPA_POD_Int(pw->stride)); + + pw_stream_update_params(pw->stream, params, n_params); +} + +static void on_stream_drained(void *data) +{ + snd_pcm_pipewire_t *pw = data; + pw->drained = true; + pw->draining = false; + pw_log_debug("%p: drained", pw); + pw_thread_loop_signal(pw->main_loop, false); +} + +static void on_stream_process(void *data) +{ + snd_pcm_pipewire_t *pw = data; + snd_pcm_ioplug_t *io = &pw->io; + struct pw_buffer *b; + snd_pcm_uframes_t hw_avail, before, want, xfer; + struct pw_time pwt; + int64_t delay; + + pw_stream_get_time_n(pw->stream, &pwt, sizeof(pwt)); + + delay = pwt.delay; + if (pwt.rate.num != 0) + delay = delay * io->rate * pwt.rate.num / pwt.rate.denom; + + before = hw_avail = snd_pcm_ioplug_hw_avail(io, pw->hw_ptr, io->appl_ptr); + + if (pw->drained) + goto done; + + b = pw_stream_dequeue_buffer(pw->stream); + if (b == NULL) + return; + + want = b->requested ? b->requested : hw_avail; + + SEQ_WRITE(pw->seq); + + if (pw->now != pwt.now) { + pw->transfered = pw->buffered; + pw->buffered = 0; + } + + xfer = snd_pcm_pipewire_process(pw, b, &hw_avail, want); + + pw->delay = delay; + /* the buffer is now queued in the stream and consumed */ + if (io->stream == SND_PCM_STREAM_PLAYBACK) + pw->transfered += xfer; + + /* more then requested data transfered, use them in next iteration */ + pw->buffered = (want == 0 || pw->transfered < want) ? 0 : (pw->transfered % want); + + pw->now = pwt.now; + SEQ_WRITE(pw->seq); + + pw_log_trace("%p: avail-before:%lu avail:%lu want:%lu xfer:%lu hw:%lu appl:%lu", + pw, before, hw_avail, want, xfer, pw->hw_ptr, io->appl_ptr); + + pw_stream_queue_buffer(pw->stream, b); + + if (io->state == SND_PCM_STATE_DRAINING && !pw->draining && hw_avail == 0) { + if (io->stream == SND_PCM_STREAM_CAPTURE) { + on_stream_drained (pw); /* since pw_stream does not call drained() for capture */ + } else { + pw_stream_flush(pw->stream, true); + pw->draining = true; + pw->drained = false; + } + } +done: + update_active(io); +} + +static const struct pw_stream_events stream_events = { + PW_VERSION_STREAM_EVENTS, + .param_changed = on_stream_param_changed, + .process = on_stream_process, + .drained = on_stream_drained, +}; + +static int pipewire_start(snd_pcm_pipewire_t *pw) +{ + if (!pw->activated && pw->stream != NULL) { + pw_stream_set_active(pw->stream, true); + pw->activated = true; + } + return 0; +} + +static int snd_pcm_pipewire_drain(snd_pcm_ioplug_t *io) +{ + int res; + snd_pcm_pipewire_t *pw = io->private_data; + + pw_thread_loop_lock(pw->main_loop); + pw_log_debug("%p: drain", pw); + pw->drained = false; + pw->draining = false; + pipewire_start(pw); + while (!pw->drained && pw->error >= 0 && pw->activated) { + pw_thread_loop_wait(pw->main_loop); + } + res = pw->error; + pw_thread_loop_unlock(pw->main_loop); + return res; +} + +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)); + uint32_t min_period; + + pw_thread_loop_lock(pw->main_loop); + + snd_pcm_sw_params_alloca(&swparams); + if (snd_pcm_sw_params_current(io->pcm, swparams) == 0) { + snd_pcm_sw_params_get_avail_min(swparams, &pw->min_avail); + snd_pcm_sw_params_get_boundary(swparams, &pw->boundary); + snd_pcm_sw_params_dump(swparams, pw->output); + fflush(pw->log_file); + } else { + pw->min_avail = io->period_size; + pw->boundary = io->buffer_size; + } + + min_period = (MIN_PERIOD * io->rate / 48000); + pw->min_avail = SPA_MAX(pw->min_avail, min_period); + + pw_log_debug("%p: prepare error:%d stream:%p buffer-size:%lu " + "period-size:%lu min-avail:%ld", pw, pw->error, + pw->stream, io->buffer_size, io->period_size, pw->min_avail); + + if (pw->error >= 0 && pw->stream != NULL && !pw->hw_params_changed) + goto done; + pw->hw_params_changed = false; + + pw_properties_setf(pw->props, PW_KEY_NODE_LATENCY, "%lu/%u", pw->min_avail, io->rate); + pw_properties_setf(pw->props, PW_KEY_NODE_RATE, "1/%u", io->rate); + + params[0] = spa_format_audio_raw_build(&b, SPA_PARAM_EnumFormat, &pw->format); + + if (pw->stream != NULL) { + pw_stream_update_properties(pw->stream, &pw->props->dict); + pw_stream_update_params(pw->stream, params, 1); + goto done; + } + + pw->stream = pw_stream_new(pw->core, NULL, pw_properties_copy(pw->props)); + if (pw->stream == NULL) + goto error; + + pw_stream_add_listener(pw->stream, &pw->stream_listener, &stream_events, pw); + + pw->error = 0; + + pw_stream_connect(pw->stream, + io->stream == SND_PCM_STREAM_PLAYBACK ? + PW_DIRECTION_OUTPUT : + PW_DIRECTION_INPUT, + PW_ID_ANY, + PW_STREAM_FLAG_AUTOCONNECT | + PW_STREAM_FLAG_MAP_BUFFERS | + PW_STREAM_FLAG_RT_PROCESS, + params, 1); + +done: + pw->hw_ptr = 0; + pw->now = 0; + pw->xrun_detected = false; + pw->drained = false; + pw->draining = false; + + 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); + pw_log_debug("%p: start", pw); + pipewire_start(pw); + 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_log_debug("%p: stop", pw); + update_active(io); + + 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; +} + +static int snd_pcm_pipewire_pause(snd_pcm_ioplug_t * io, int enable) +{ + pw_log_debug("%p: pause", io); + + if (enable) + snd_pcm_pipewire_stop(io); + else + snd_pcm_pipewire_start(io); + + 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 8: + info->position[6] = SPA_AUDIO_CHANNEL_SL; + info->position[7] = SPA_AUDIO_CHANNEL_SR; + SPA_FALLTHROUGH + case 6: + info->position[5] = SPA_AUDIO_CHANNEL_LFE; + SPA_FALLTHROUGH + case 5: + info->position[4] = SPA_AUDIO_CHANNEL_FC; + SPA_FALLTHROUGH + case 4: + info->position[2] = SPA_AUDIO_CHANNEL_RL; + info->position[3] = SPA_AUDIO_CHANNEL_RR; + SPA_FALLTHROUGH + 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; + + snd_pcm_hw_params_dump(params, pw->output); + fflush(pw->log_file); + + pw_log_debug("%p: hw_params buffer_size:%lu period_size:%lu", pw, 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); + if (planar) { + pw->blocks = io->channels; + pw->stride = pw->sample_bits / 8; + } else { + pw->blocks = 1; + pw->stride = (io->channels * pw->sample_bits) / 8; + } + pw->hw_params_changed = true; + pw_log_info("%p: format:%s channels:%d rate:%d stride:%d blocks:%d", pw, + spa_debug_type_find_name(spa_type_audio_format, pw->format.format), + io->channels, io->rate, pw->stride, pw->blocks); + + return 0; +} + +static int snd_pcm_pipewire_sw_params(snd_pcm_ioplug_t * io, + snd_pcm_sw_params_t * sw_params) +{ + snd_pcm_pipewire_t *pw = io->private_data; + + pw_thread_loop_lock(pw->main_loop); + if (pw->stream) { + snd_pcm_uframes_t min_avail; + snd_pcm_sw_params_get_avail_min( sw_params, &min_avail); + snd_pcm_sw_params_get_boundary(sw_params, &pw->boundary); + if (min_avail != pw->min_avail) { + char latency[64]; + struct spa_dict_item item[1]; + uint32_t min_period = (MIN_PERIOD * io->rate / 48000); + + pw->min_avail = SPA_MAX(min_avail, min_period); + + spa_scnprintf(latency, sizeof(latency), "%lu/%u", pw->min_avail, io->rate); + item[0] = SPA_DICT_ITEM_INIT(PW_KEY_NODE_LATENCY, latency); + + pw_log_debug("%p: sw_params update props %p %ld", pw, pw->stream, pw->min_avail); + pw_stream_update_properties(pw->stream, &SPA_DICT_INIT(item, 1)); + } + } else { + pw_log_debug("%p: sw_params pre-prepare noop", pw); + } + pw_thread_loop_unlock(pw->main_loop); + + 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) +{ + SPA_FOR_EACH_ELEMENT_VAR(chmap_info, info) + if (info->channel == channel) + return info->pos; + return SND_CHMAP_UNKNOWN; +} + +static enum spa_audio_channel chmap_to_channel(enum snd_pcm_chmap_position pos) +{ + if (pos >= SPA_N_ELEMENTS(chmap_info)) + return SPA_AUDIO_CHANNEL_UNKNOWN; + return chmap_info[pos].channel; +} + +static int snd_pcm_pipewire_set_chmap(snd_pcm_ioplug_t * io, + const snd_pcm_chmap_t * map) +{ + snd_pcm_pipewire_t *pw = io->private_data; + unsigned int i; + + pw->format.channels = map->channels; + for (i = 0; i < map->channels; i++) { + pw->format.position[i] = chmap_to_channel(map->pos[i]); + pw_log_debug("map %d: %s / %s", i, + snd_pcm_chmap_name(map->pos[i]), + spa_debug_type_find_short_name(spa_type_audio_channel, + pw->format.position[i])); + } + 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(7, 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, 4, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_RL, SND_CHMAP_RR); + make_map(maps, 3, 5, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_RL, SND_CHMAP_RR, + SND_CHMAP_FC); + make_map(maps, 4, 6, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_RL, SND_CHMAP_RR, + SND_CHMAP_FC, SND_CHMAP_LFE); + make_map(maps, 5, 8, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_RL, SND_CHMAP_RR, + SND_CHMAP_FC, SND_CHMAP_LFE, SND_CHMAP_SL, SND_CHMAP_SR); + + 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, + .pause = snd_pcm_pipewire_pause, + .pointer = snd_pcm_pipewire_pointer, + .delay = snd_pcm_pipewire_delay, + .drain = snd_pcm_pipewire_drain, + .prepare = snd_pcm_pipewire_prepare, + .poll_descriptors = snd_pcm_pipewire_poll_descriptors, + .poll_revents = snd_pcm_pipewire_poll_revents, + .hw_params = snd_pcm_pipewire_hw_params, + .sw_params = snd_pcm_pipewire_sw_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[] = { +#if __BYTE_ORDER == __LITTLE_ENDIAN + SND_PCM_FORMAT_FLOAT_LE, + SND_PCM_FORMAT_S32_LE, + SND_PCM_FORMAT_S24_LE, + SND_PCM_FORMAT_S24_3LE, + SND_PCM_FORMAT_S24_3BE, + SND_PCM_FORMAT_S16_LE, +#elif __BYTE_ORDER == __BIG_ENDIAN + SND_PCM_FORMAT_FLOAT_BE, + SND_PCM_FORMAT_S32_BE, + SND_PCM_FORMAT_S24_BE, + SND_PCM_FORMAT_S24_3LE, + SND_PCM_FORMAT_S24_3BE, + SND_PCM_FORMAT_S16_BE, +#endif + SND_PCM_FORMAT_U8, + }; + int val; + int min_rate; + int max_rate; + int min_channels; + int max_channels; + int min_period_bytes; + int max_period_bytes; + int min_buffer_bytes; + int max_buffer_bytes; + const char *str; + snd_pcm_format_t format; + int err; + + val = pw_properties_get_uint32(pw->props, "alsa.rate", 0); + if (val > 0) { + min_rate = max_rate = SPA_CLAMP(val, 1, MAX_RATE); + } else { + min_rate = 1; + max_rate = MAX_RATE; + } + val = pw_properties_get_uint32(pw->props, "alsa.channels", 0); + if (val > 0) { + min_channels = max_channels = SPA_CLAMP(val, 1, MAX_CHANNELS); + } else { + min_channels = 1; + max_channels = MAX_CHANNELS; + } + val = pw_properties_get_uint32(pw->props, "alsa.period-bytes", 0); + if (val > 0) { + min_period_bytes = max_period_bytes = SPA_CLAMP(val, + MIN_PERIOD_BYTES, MAX_PERIOD_BYTES); + } else { + min_period_bytes = MIN_PERIOD_BYTES; + max_period_bytes = MAX_PERIOD_BYTES; + } + val = pw_properties_get_uint32(pw->props, "alsa.buffer-bytes", 0); + if (val > 0) { + min_buffer_bytes = max_buffer_bytes = SPA_CLAMP(val, + MIN_BUFFER_BYTES, MAX_BUFFER_BYTES); + } else { + min_buffer_bytes = MIN_BUFFER_BYTES; + max_buffer_bytes = MAX_BUFFER_BYTES; + } + if (min_period_bytes * 2 > max_buffer_bytes) + min_period_bytes = max_period_bytes = max_buffer_bytes / 2; + + 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_minmax(&pw->io, SND_PCM_IOPLUG_HW_CHANNELS, + min_channels, max_channels)) < 0 || + (err = snd_pcm_ioplug_set_param_minmax(&pw->io, SND_PCM_IOPLUG_HW_RATE, + min_rate, max_rate)) < 0 || + (err = snd_pcm_ioplug_set_param_minmax(&pw->io, SND_PCM_IOPLUG_HW_BUFFER_BYTES, + min_buffer_bytes, + max_buffer_bytes)) < 0 || + (err = snd_pcm_ioplug_set_param_minmax(&pw->io, + SND_PCM_IOPLUG_HW_PERIOD_BYTES, + min_period_bytes, + max_period_bytes)) < 0 || + (err = snd_pcm_ioplug_set_param_minmax(&pw->io, SND_PCM_IOPLUG_HW_PERIODS, + MIN_BUFFERS, 1024)) < 0) { + pw_log_warn("Can't set param list: %s", snd_strerror(err)); + return err; + } + format = SND_PCM_FORMAT_UNKNOWN; + if ((str = pw_properties_get(pw->props, "alsa.format"))) + format = snd_pcm_format_value(str); + + if (format != SND_PCM_FORMAT_UNKNOWN) { + err = snd_pcm_ioplug_set_param_list(&pw->io, + SND_PCM_IOPLUG_HW_FORMAT, + 1, (unsigned int *)&format); + if (err < 0) { + pw_log_warn("Can't set param list: %s", snd_strerror(err)); + return err; + } + } else { + err = snd_pcm_ioplug_set_param_list(&pw->io, + SND_PCM_IOPLUG_HW_FORMAT, + SPA_N_ELEMENTS(format_list), + format_list); + if (err < 0) { + pw_log_warn("Can't set param list: %s", snd_strerror(err)); + return err; + } + } + return 0; +} + +static void on_core_error(void *data, uint32_t id, int seq, int res, const char *message) +{ + snd_pcm_pipewire_t *pw = data; + + pw_log_warn("%p: error id:%u seq:%d res:%d (%s): %s", pw, + id, seq, res, spa_strerror(res), message); + + if (id == PW_ID_CORE) { + pw->error = res; + if (pw->fd != -1) + update_active(&pw->io); + } + pw_thread_loop_signal(pw->main_loop, false); +} + +static const struct pw_core_events core_events = { + PW_VERSION_CORE_EVENTS, + .error = on_core_error, +}; + + +static ssize_t log_write(void *cookie, const char *buf, size_t size) +{ + int len; + + while (size > 0) { + len = strcspn(buf, "\n"); + if (len > 0) + pw_log_debug("%.*s", (int)len, buf); + buf += len + 1; + size -= len + 1; + } + return size; +} + +static cookie_io_functions_t io_funcs = { + .write = log_write, +}; + +static int execute_match(void *data, const char *location, const char *action, + const char *val, size_t len) +{ + snd_pcm_pipewire_t *pw = data; + if (spa_streq(action, "update-props")) + pw_properties_update_string(pw->props, val, len); + return 1; +} + +static int snd_pcm_pipewire_open(snd_pcm_t **pcmp, + struct pw_properties *props, snd_pcm_stream_t stream, int mode) +{ + snd_pcm_pipewire_t *pw; + int err; + const char *str, *node_name = NULL; + struct pw_loop *loop; + + assert(pcmp); + pw = calloc(1, sizeof(*pw)); + if (!pw) + return -ENOMEM; + + pw->props = props; + pw->fd = -1; + pw->io.poll_fd = -1; + pw->log_file = fopencookie(pw, "w", io_funcs); + if (pw->log_file == NULL) { + pw_log_error("can't create log file: %m"); + err = -errno; + goto error; + } + if ((err = snd_output_stdio_attach(&pw->output, pw->log_file, 0)) < 0) { + pw_log_error("can't attach log file: %s", snd_strerror(err)); + goto error; + } + + pw->main_loop = pw_thread_loop_new("alsa-pipewire", NULL); + if (pw->main_loop == NULL) { + err = -errno; + goto error; + } + loop = pw_thread_loop_get_loop(pw->main_loop); + pw->system = loop->system; + if ((pw->context = pw_context_new(loop, + pw_properties_new( + PW_KEY_CONFIG_NAME, "client-rt.conf", + PW_KEY_CLIENT_API, "alsa", + NULL), + 0)) == NULL) { + err = -errno; + goto error; + } + + pw_context_conf_update_props(pw->context, "alsa.properties", pw->props); + + pw_context_conf_section_match_rules(pw->context, "alsa.rules", + &pw_context_get_properties(pw->context)->dict, execute_match, pw); + + if (pw_properties_get(pw->props, PW_KEY_APP_NAME) == NULL) + pw_properties_setf(pw->props, PW_KEY_APP_NAME, "PipeWire ALSA [%s]", + pw_get_prgname()); + if (pw_properties_get(pw->props, PW_KEY_NODE_NAME) == NULL) + pw_properties_setf(pw->props, PW_KEY_NODE_NAME, "ALSA %s", + stream == SND_PCM_STREAM_PLAYBACK ? "Playback" : "Capture"); + if (pw_properties_get(pw->props, PW_KEY_MEDIA_TYPE) == NULL) + pw_properties_set(pw->props, PW_KEY_MEDIA_TYPE, "Audio"); + if (pw_properties_get(pw->props, PW_KEY_MEDIA_CATEGORY) == NULL) + pw_properties_set(pw->props, PW_KEY_MEDIA_CATEGORY, + stream == SND_PCM_STREAM_PLAYBACK ? + "Playback" : "Capture"); + + str = getenv("PIPEWIRE_ALSA"); + if (str != NULL) + pw_properties_update_string(pw->props, str, strlen(str)); + + str = getenv("PIPEWIRE_NODE"); + if (str != NULL && str[0]) + pw_properties_set(pw->props, PW_KEY_TARGET_OBJECT, str); + + node_name = pw_properties_get(pw->props, PW_KEY_NODE_NAME); + if (pw_properties_get(pw->props, PW_KEY_MEDIA_NAME) == NULL) + pw_properties_set(pw->props, PW_KEY_MEDIA_NAME, node_name); + + if ((err = pw_thread_loop_start(pw->main_loop)) < 0) + goto error; + + pw_thread_loop_lock(pw->main_loop); + pw->core = pw_context_connect(pw->context, pw_properties_copy(pw->props), 0); + if (pw->core == NULL) { + err = -errno; + pw_thread_loop_unlock(pw->main_loop); + goto error; + } + pw_core_add_listener(pw->core, &pw->core_listener, &core_events, pw); + pw_thread_loop_unlock(pw->main_loop); + + pw->fd = spa_system_eventfd_create(pw->system, SPA_FD_CLOEXEC | SPA_FD_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; +#ifdef SND_PCM_IOPLUG_FLAG_BOUNDARY_WA + pw->io.flags = SND_PCM_IOPLUG_FLAG_BOUNDARY_WA; +#else +#warning hw_ptr updates of buffer_size will not be recognized by the ALSA library. Consider to update your ALSA library. +#endif + pw->io.flags |= SND_PCM_IOPLUG_FLAG_MONOTONIC; + + if ((err = snd_pcm_ioplug_create(&pw->io, node_name, stream, mode)) < 0) + goto error; + + if ((err = pipewire_set_hw_constraint(pw)) < 0) + goto error; + + pw_log_debug("%p: opened name:%s stream:%s mode:%d", pw, node_name, + snd_pcm_stream_name(pw->io.stream), mode); + + *pcmp = pw->io.pcm; + + return 0; + +error: + pw_log_debug("%p: failed to open %s :%s", pw, node_name, spa_strerror(err)); + snd_pcm_pipewire_free(pw); + return err; +} + + +SPA_EXPORT +SND_PCM_PLUGIN_DEFINE_FUNC(pipewire) +{ + snd_config_iterator_t i, next; + struct pw_properties *props; + const char *str; + long val; + int err; + + pw_init(NULL, NULL); + if (strstr(pw_get_library_version(), "0.2") != NULL) + return -ENOTSUP; + + props = pw_properties_new(NULL, NULL); + if (props == NULL) + return -errno; + + PW_LOG_TOPIC_INIT(alsa_log_topic); + + 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 (spa_streq(id, "comment") || spa_streq(id, "type") || spa_streq(id, "hint")) + continue; + if (spa_streq(id, "name")) { + if (snd_config_get_string(n, &str) == 0) + pw_properties_set(props, PW_KEY_NODE_NAME, str); + continue; + } + if (spa_streq(id, "server")) { + if (snd_config_get_string(n, &str) == 0) + pw_properties_set(props, PW_KEY_REMOTE_NAME, str); + continue; + } + if (spa_streq(id, "playback_node")) { + if (stream == SND_PCM_STREAM_PLAYBACK && + snd_config_get_string(n, &str) == 0) + if (str != NULL && !spa_streq(str, "-1")) + pw_properties_set(props, PW_KEY_TARGET_OBJECT, str); + continue; + } + if (spa_streq(id, "capture_node")) { + if (stream == SND_PCM_STREAM_CAPTURE && + snd_config_get_string(n, &str) == 0) + if (str != NULL && !spa_streq(str, "-1")) + pw_properties_set(props, PW_KEY_TARGET_OBJECT, str); + continue; + } + if (spa_streq(id, "role")) { + if (snd_config_get_string(n, &str) == 0) + if (str != NULL && *str) + pw_properties_set(props, PW_KEY_MEDIA_ROLE, str); + continue; + } + if (spa_streq(id, "exclusive")) { + if (snd_config_get_bool(n)) + pw_properties_set(props, PW_KEY_NODE_EXCLUSIVE, "true"); + continue; + } + if (spa_streq(id, "rate")) { + if (snd_config_get_integer(n, &val) == 0) { + if (val != 0) + pw_properties_setf(props, "alsa.rate", "%ld", val); + } else { + SNDERR("%s: invalid type", id); + } + continue; + } + if (spa_streq(id, "format")) { + if (snd_config_get_string(n, &str) == 0) { + if (str != NULL && *str) + pw_properties_set(props, "alsa.format", str); + } else { + SNDERR("%s: invalid type", id); + } + continue; + } + if (spa_streq(id, "channels")) { + if (snd_config_get_integer(n, &val) == 0) { + if (val != 0) + pw_properties_setf(props, "alsa.channels", "%ld", val); + } else { + SNDERR("%s: invalid type", id); + } + continue; + } + if (spa_streq(id, "period_bytes")) { + if (snd_config_get_integer(n, &val) == 0) { + if (val != 0) + pw_properties_setf(props, "alsa.period-bytes", "%ld", val); + } else { + SNDERR("%s: invalid type", id); + } + continue; + } + if (spa_streq(id, "buffer_bytes")) { + long val; + + if (snd_config_get_integer(n, &val) == 0) { + if (val != 0) + pw_properties_setf(props, "alsa.buffer-bytes", "%ld", val); + } else { + SNDERR("%s: invalid type", id); + } + continue; + } + SNDERR("Unknown field %s", id); + pw_properties_free(props); + return -EINVAL; + } + + err = snd_pcm_pipewire_open(pcmp, props, stream, mode); + + return err; +} + +SPA_EXPORT +SND_PCM_PLUGIN_SYMBOL(pipewire); |