diff options
Diffstat (limited to 'media/libcubeb/src/cubeb_pulse.c')
| -rw-r--r-- | media/libcubeb/src/cubeb_pulse.c | 1385 |
1 files changed, 1385 insertions, 0 deletions
diff --git a/media/libcubeb/src/cubeb_pulse.c b/media/libcubeb/src/cubeb_pulse.c new file mode 100644 index 000000000..4f474452d --- /dev/null +++ b/media/libcubeb/src/cubeb_pulse.c @@ -0,0 +1,1385 @@ +/* + * Copyright © 2011 Mozilla Foundation + * + * This program is made available under an ISC-style license. See the + * accompanying file LICENSE for details. + */ +#undef NDEBUG +#include <assert.h> +#include <dlfcn.h> +#include <stdlib.h> +#include <pulse/pulseaudio.h> +#include <string.h> +#include "cubeb/cubeb.h" +#include "cubeb-internal.h" +#include <stdio.h> + +#ifdef DISABLE_LIBPULSE_DLOPEN +#define WRAP(x) x +#else +#define WRAP(x) cubeb_##x +#define LIBPULSE_API_VISIT(X) \ + X(pa_channel_map_can_balance) \ + X(pa_channel_map_init_auto) \ + X(pa_context_connect) \ + X(pa_context_disconnect) \ + X(pa_context_drain) \ + X(pa_context_get_server_info) \ + X(pa_context_get_sink_info_by_name) \ + X(pa_context_get_sink_info_list) \ + X(pa_context_get_source_info_list) \ + X(pa_context_get_state) \ + X(pa_context_new) \ + X(pa_context_rttime_new) \ + X(pa_context_set_sink_input_volume) \ + X(pa_context_set_state_callback) \ + X(pa_context_unref) \ + X(pa_cvolume_set) \ + X(pa_cvolume_set_balance) \ + X(pa_frame_size) \ + X(pa_operation_get_state) \ + X(pa_operation_unref) \ + X(pa_proplist_gets) \ + X(pa_rtclock_now) \ + X(pa_stream_begin_write) \ + X(pa_stream_cancel_write) \ + X(pa_stream_connect_playback) \ + X(pa_stream_cork) \ + X(pa_stream_disconnect) \ + X(pa_stream_get_channel_map) \ + X(pa_stream_get_index) \ + X(pa_stream_get_latency) \ + X(pa_stream_get_sample_spec) \ + X(pa_stream_get_state) \ + X(pa_stream_get_time) \ + X(pa_stream_new) \ + X(pa_stream_set_state_callback) \ + X(pa_stream_set_write_callback) \ + X(pa_stream_unref) \ + X(pa_stream_update_timing_info) \ + X(pa_stream_write) \ + X(pa_sw_volume_from_linear) \ + X(pa_threaded_mainloop_free) \ + X(pa_threaded_mainloop_get_api) \ + X(pa_threaded_mainloop_in_thread) \ + X(pa_threaded_mainloop_lock) \ + X(pa_threaded_mainloop_new) \ + X(pa_threaded_mainloop_signal) \ + X(pa_threaded_mainloop_start) \ + X(pa_threaded_mainloop_stop) \ + X(pa_threaded_mainloop_unlock) \ + X(pa_threaded_mainloop_wait) \ + X(pa_usec_to_bytes) \ + X(pa_stream_set_read_callback) \ + X(pa_stream_connect_record) \ + X(pa_stream_readable_size) \ + X(pa_stream_writable_size) \ + X(pa_stream_peek) \ + X(pa_stream_drop) \ + X(pa_stream_get_buffer_attr) \ + X(pa_stream_get_device_name) \ + X(pa_context_set_subscribe_callback) \ + X(pa_context_subscribe) \ + X(pa_mainloop_api_once) \ + +#define MAKE_TYPEDEF(x) static typeof(x) * cubeb_##x; +LIBPULSE_API_VISIT(MAKE_TYPEDEF); +#undef MAKE_TYPEDEF +#endif + +static struct cubeb_ops const pulse_ops; + +struct cubeb { + struct cubeb_ops const * ops; + void * libpulse; + pa_threaded_mainloop * mainloop; + pa_context * context; + pa_sink_info * default_sink_info; + char * context_name; + int error; + cubeb_device_collection_changed_callback collection_changed_callback; + void * collection_changed_user_ptr; +}; + +struct cubeb_stream { + cubeb * context; + pa_stream * output_stream; + pa_stream * input_stream; + cubeb_data_callback data_callback; + cubeb_state_callback state_callback; + void * user_ptr; + pa_time_event * drain_timer; + pa_sample_spec output_sample_spec; + pa_sample_spec input_sample_spec; + int shutdown; + float volume; + cubeb_state state; +}; + +static const float PULSE_NO_GAIN = -1.0; + +enum cork_state { + UNCORK = 0, + CORK = 1 << 0, + NOTIFY = 1 << 1 +}; + +static void +sink_info_callback(pa_context * context, const pa_sink_info * info, int eol, void * u) +{ + (void)context; + cubeb * ctx = u; + if (!eol) { + free(ctx->default_sink_info); + ctx->default_sink_info = malloc(sizeof(pa_sink_info)); + memcpy(ctx->default_sink_info, info, sizeof(pa_sink_info)); + } + WRAP(pa_threaded_mainloop_signal)(ctx->mainloop, 0); +} + +static void +server_info_callback(pa_context * context, const pa_server_info * info, void * u) +{ + WRAP(pa_context_get_sink_info_by_name)(context, info->default_sink_name, sink_info_callback, u); +} + +static void +context_state_callback(pa_context * c, void * u) +{ + cubeb * ctx = u; + if (!PA_CONTEXT_IS_GOOD(WRAP(pa_context_get_state)(c))) { + ctx->error = 1; + } + WRAP(pa_threaded_mainloop_signal)(ctx->mainloop, 0); +} + +static void +context_notify_callback(pa_context * c, void * u) +{ + (void)c; + cubeb * ctx = u; + WRAP(pa_threaded_mainloop_signal)(ctx->mainloop, 0); +} + +static void +stream_success_callback(pa_stream * s, int success, void * u) +{ + (void)s; + (void)success; + cubeb_stream * stm = u; + WRAP(pa_threaded_mainloop_signal)(stm->context->mainloop, 0); +} + +static void +stream_state_change_callback(cubeb_stream * stm, cubeb_state s) +{ + stm->state = s; + stm->state_callback(stm, stm->user_ptr, s); +} + +static void +stream_drain_callback(pa_mainloop_api * a, pa_time_event * e, struct timeval const * tv, void * u) +{ + (void)a; + (void)tv; + cubeb_stream * stm = u; + assert(stm->drain_timer == e); + stream_state_change_callback(stm, CUBEB_STATE_DRAINED); + /* there's no pa_rttime_free, so use this instead. */ + a->time_free(stm->drain_timer); + stm->drain_timer = NULL; + WRAP(pa_threaded_mainloop_signal)(stm->context->mainloop, 0); +} + +static void +stream_state_callback(pa_stream * s, void * u) +{ + cubeb_stream * stm = u; + if (!PA_STREAM_IS_GOOD(WRAP(pa_stream_get_state)(s))) { + stream_state_change_callback(stm, CUBEB_STATE_ERROR); + } + WRAP(pa_threaded_mainloop_signal)(stm->context->mainloop, 0); +} + +static void +trigger_user_callback(pa_stream * s, void const * input_data, size_t nbytes, cubeb_stream * stm) +{ + void * buffer; + size_t size; + int r; + long got; + size_t towrite, read_offset; + size_t frame_size; + + frame_size = WRAP(pa_frame_size)(&stm->output_sample_spec); + assert(nbytes % frame_size == 0); + + towrite = nbytes; + read_offset = 0; + while (towrite) { + size = towrite; + r = WRAP(pa_stream_begin_write)(s, &buffer, &size); + // Note: this has failed running under rr on occassion - needs investigation. + assert(r == 0); + assert(size > 0); + assert(size % frame_size == 0); + + LOGV("Trigger user callback with output buffer size=%zd, read_offset=%zd", size, read_offset); + got = stm->data_callback(stm, stm->user_ptr, (uint8_t const *)input_data + read_offset, buffer, size / frame_size); + if (got < 0) { + WRAP(pa_stream_cancel_write)(s); + stm->shutdown = 1; + return; + } + // If more iterations move offset of read buffer + if (input_data) { + size_t in_frame_size = WRAP(pa_frame_size)(&stm->input_sample_spec); + read_offset += (size / frame_size) * in_frame_size; + } + + if (stm->volume != PULSE_NO_GAIN) { + uint32_t samples = size * stm->output_sample_spec.channels / frame_size ; + + if (stm->output_sample_spec.format == PA_SAMPLE_S16BE || + stm->output_sample_spec.format == PA_SAMPLE_S16LE) { + short * b = buffer; + for (uint32_t i = 0; i < samples; i++) { + b[i] *= stm->volume; + } + } else { + float * b = buffer; + for (uint32_t i = 0; i < samples; i++) { + b[i] *= stm->volume; + } + } + } + + r = WRAP(pa_stream_write)(s, buffer, got * frame_size, NULL, 0, PA_SEEK_RELATIVE); + assert(r == 0); + + if ((size_t) got < size / frame_size) { + pa_usec_t latency = 0; + r = WRAP(pa_stream_get_latency)(s, &latency, NULL); + if (r == -PA_ERR_NODATA) { + /* this needs a better guess. */ + latency = 100 * PA_USEC_PER_MSEC; + } + assert(r == 0 || r == -PA_ERR_NODATA); + /* pa_stream_drain is useless, see PA bug# 866. this is a workaround. */ + /* arbitrary safety margin: double the current latency. */ + assert(!stm->drain_timer); + stm->drain_timer = WRAP(pa_context_rttime_new)(stm->context->context, WRAP(pa_rtclock_now)() + 2 * latency, stream_drain_callback, stm); + stm->shutdown = 1; + return; + } + + towrite -= size; + } + + assert(towrite == 0); +} + +static int +read_from_input(pa_stream * s, void const ** buffer, size_t * size) +{ + size_t readable_size = WRAP(pa_stream_readable_size)(s); + if (readable_size > 0) { + if (WRAP(pa_stream_peek)(s, buffer, size) < 0) { + return -1; + } + } + return readable_size; +} + +static void +stream_write_callback(pa_stream * s, size_t nbytes, void * u) +{ + LOGV("Output callback to be written buffer size %zd", nbytes); + cubeb_stream * stm = u; + if (stm->shutdown || + stm->state != CUBEB_STATE_STARTED) { + return; + } + + if (!stm->input_stream){ + // Output/playback only operation. + // Write directly to output + assert(!stm->input_stream && stm->output_stream); + trigger_user_callback(s, NULL, nbytes, stm); + } +} + +static void +stream_read_callback(pa_stream * s, size_t nbytes, void * u) +{ + LOGV("Input callback buffer size %zd", nbytes); + cubeb_stream * stm = u; + if (stm->shutdown) { + return; + } + + void const * read_data = NULL; + size_t read_size; + while (read_from_input(s, &read_data, &read_size) > 0) { + /* read_data can be NULL in case of a hole. */ + if (read_data) { + size_t in_frame_size = WRAP(pa_frame_size)(&stm->input_sample_spec); + size_t read_frames = read_size / in_frame_size; + + if (stm->output_stream) { + // input/capture + output/playback operation + size_t out_frame_size = WRAP(pa_frame_size)(&stm->output_sample_spec); + size_t write_size = read_frames * out_frame_size; + // Offer full duplex data for writing + trigger_user_callback(stm->output_stream, read_data, write_size, stm); + } else { + // input/capture only operation. Call callback directly + long got = stm->data_callback(stm, stm->user_ptr, read_data, NULL, read_frames); + if (got < 0 || (size_t) got != read_frames) { + WRAP(pa_stream_cancel_write)(s); + stm->shutdown = 1; + break; + } + } + } + if (read_size > 0) { + WRAP(pa_stream_drop)(s); + } + + if (stm->shutdown) { + return; + } + } +} + +static int +wait_until_context_ready(cubeb * ctx) +{ + for (;;) { + pa_context_state_t state = WRAP(pa_context_get_state)(ctx->context); + if (!PA_CONTEXT_IS_GOOD(state)) + return -1; + if (state == PA_CONTEXT_READY) + break; + WRAP(pa_threaded_mainloop_wait)(ctx->mainloop); + } + return 0; +} + +static int +wait_until_io_stream_ready(pa_stream * stream, pa_threaded_mainloop * mainloop) +{ + if (!stream || !mainloop){ + return -1; + } + for (;;) { + pa_stream_state_t state = WRAP(pa_stream_get_state)(stream); + if (!PA_STREAM_IS_GOOD(state)) + return -1; + if (state == PA_STREAM_READY) + break; + WRAP(pa_threaded_mainloop_wait)(mainloop); + } + return 0; +} + +static int +wait_until_stream_ready(cubeb_stream * stm) +{ + if (stm->output_stream && + wait_until_io_stream_ready(stm->output_stream, stm->context->mainloop) == -1) { + return -1; + } + if(stm->input_stream && + wait_until_io_stream_ready(stm->input_stream, stm->context->mainloop) == -1) { + return -1; + } + return 0; +} + +static int +operation_wait(cubeb * ctx, pa_stream * stream, pa_operation * o) +{ + while (WRAP(pa_operation_get_state)(o) == PA_OPERATION_RUNNING) { + WRAP(pa_threaded_mainloop_wait)(ctx->mainloop); + if (!PA_CONTEXT_IS_GOOD(WRAP(pa_context_get_state)(ctx->context))) { + return -1; + } + if (stream && !PA_STREAM_IS_GOOD(WRAP(pa_stream_get_state)(stream))) { + return -1; + } + } + return 0; +} + +static void +cork_io_stream(cubeb_stream * stm, pa_stream * io_stream, enum cork_state state) +{ + pa_operation * o; + if (!io_stream) { + return; + } + o = WRAP(pa_stream_cork)(io_stream, state & CORK, stream_success_callback, stm); + if (o) { + operation_wait(stm->context, io_stream, o); + WRAP(pa_operation_unref)(o); + } +} + +static void +stream_cork(cubeb_stream * stm, enum cork_state state) +{ + WRAP(pa_threaded_mainloop_lock)(stm->context->mainloop); + cork_io_stream(stm, stm->output_stream, state); + cork_io_stream(stm, stm->input_stream, state); + WRAP(pa_threaded_mainloop_unlock)(stm->context->mainloop); + + if (state & NOTIFY) { + stream_state_change_callback(stm, state & CORK ? CUBEB_STATE_STOPPED + : CUBEB_STATE_STARTED); + } +} + +static int +stream_update_timing_info(cubeb_stream * stm) +{ + int r = -1; + pa_operation * o = NULL; + if (stm->output_stream) { + o = WRAP(pa_stream_update_timing_info)(stm->output_stream, stream_success_callback, stm); + if (o) { + r = operation_wait(stm->context, stm->output_stream, o); + WRAP(pa_operation_unref)(o); + } + if (r != 0) { + return r; + } + } + + if (stm->input_stream) { + o = WRAP(pa_stream_update_timing_info)(stm->input_stream, stream_success_callback, stm); + if (o) { + r = operation_wait(stm->context, stm->input_stream, o); + WRAP(pa_operation_unref)(o); + } + } + + return r; +} + +static void pulse_context_destroy(cubeb * ctx); +static void pulse_destroy(cubeb * ctx); + +static int +pulse_context_init(cubeb * ctx) +{ + if (ctx->context) { + assert(ctx->error == 1); + pulse_context_destroy(ctx); + } + + ctx->context = WRAP(pa_context_new)(WRAP(pa_threaded_mainloop_get_api)(ctx->mainloop), + ctx->context_name); + if (!ctx->context) { + return -1; + } + WRAP(pa_context_set_state_callback)(ctx->context, context_state_callback, ctx); + + WRAP(pa_threaded_mainloop_lock)(ctx->mainloop); + WRAP(pa_context_connect)(ctx->context, NULL, 0, NULL); + + if (wait_until_context_ready(ctx) != 0) { + WRAP(pa_threaded_mainloop_unlock)(ctx->mainloop); + pulse_context_destroy(ctx); + ctx->context = NULL; + return -1; + } + + WRAP(pa_threaded_mainloop_unlock)(ctx->mainloop); + + ctx->error = 0; + + return 0; +} + +/*static*/ int +pulse_init(cubeb ** context, char const * context_name) +{ + void * libpulse = NULL; + cubeb * ctx; + + *context = NULL; + +#ifndef DISABLE_LIBPULSE_DLOPEN + libpulse = dlopen("libpulse.so.0", RTLD_LAZY); + if (!libpulse) { + return CUBEB_ERROR; + } + +#define LOAD(x) { \ + cubeb_##x = dlsym(libpulse, #x); \ + if (!cubeb_##x) { \ + dlclose(libpulse); \ + return CUBEB_ERROR; \ + } \ + } + + LIBPULSE_API_VISIT(LOAD); +#undef LOAD +#endif + + ctx = calloc(1, sizeof(*ctx)); + assert(ctx); + + ctx->ops = &pulse_ops; + ctx->libpulse = libpulse; + + ctx->mainloop = WRAP(pa_threaded_mainloop_new)(); + ctx->default_sink_info = NULL; + + WRAP(pa_threaded_mainloop_start)(ctx->mainloop); + + ctx->context_name = context_name ? strdup(context_name) : NULL; + if (pulse_context_init(ctx) != 0) { + pulse_destroy(ctx); + return CUBEB_ERROR; + } + + WRAP(pa_threaded_mainloop_lock)(ctx->mainloop); + WRAP(pa_context_get_server_info)(ctx->context, server_info_callback, ctx); + WRAP(pa_threaded_mainloop_unlock)(ctx->mainloop); + + *context = ctx; + + return CUBEB_OK; +} + +static char const * +pulse_get_backend_id(cubeb * ctx) +{ + (void)ctx; + return "pulse"; +} + +static int +pulse_get_max_channel_count(cubeb * ctx, uint32_t * max_channels) +{ + (void)ctx; + assert(ctx && max_channels); + + WRAP(pa_threaded_mainloop_lock)(ctx->mainloop); + while (!ctx->default_sink_info) { + WRAP(pa_threaded_mainloop_wait)(ctx->mainloop); + } + WRAP(pa_threaded_mainloop_unlock)(ctx->mainloop); + + *max_channels = ctx->default_sink_info->channel_map.channels; + + return CUBEB_OK; +} + +static int +pulse_get_preferred_sample_rate(cubeb * ctx, uint32_t * rate) +{ + assert(ctx && rate); + (void)ctx; + + WRAP(pa_threaded_mainloop_lock)(ctx->mainloop); + while (!ctx->default_sink_info) { + WRAP(pa_threaded_mainloop_wait)(ctx->mainloop); + } + WRAP(pa_threaded_mainloop_unlock)(ctx->mainloop); + + *rate = ctx->default_sink_info->sample_spec.rate; + + return CUBEB_OK; +} + +static int +pulse_get_min_latency(cubeb * ctx, cubeb_stream_params params, uint32_t * latency_frames) +{ + (void)ctx; + // According to PulseAudio developers, this is a safe minimum. + *latency_frames = 25 * params.rate / 1000; + + return CUBEB_OK; +} + +static void +pulse_context_destroy(cubeb * ctx) +{ + pa_operation * o; + + WRAP(pa_threaded_mainloop_lock)(ctx->mainloop); + o = WRAP(pa_context_drain)(ctx->context, context_notify_callback, ctx); + if (o) { + operation_wait(ctx, NULL, o); + WRAP(pa_operation_unref)(o); + } + WRAP(pa_context_set_state_callback)(ctx->context, NULL, NULL); + WRAP(pa_context_disconnect)(ctx->context); + WRAP(pa_context_unref)(ctx->context); + WRAP(pa_threaded_mainloop_unlock)(ctx->mainloop); +} + +static void +pulse_destroy(cubeb * ctx) +{ + if (ctx->context_name) { + free(ctx->context_name); + } + if (ctx->context) { + pulse_context_destroy(ctx); + } + + if (ctx->mainloop) { + WRAP(pa_threaded_mainloop_stop)(ctx->mainloop); + WRAP(pa_threaded_mainloop_free)(ctx->mainloop); + } + + if (ctx->libpulse) { + dlclose(ctx->libpulse); + } + if (ctx->default_sink_info) { + free(ctx->default_sink_info); + } + free(ctx); +} + +static void pulse_stream_destroy(cubeb_stream * stm); + +static pa_sample_format_t +to_pulse_format(cubeb_sample_format format) +{ + switch (format) { + case CUBEB_SAMPLE_S16LE: + return PA_SAMPLE_S16LE; + case CUBEB_SAMPLE_S16BE: + return PA_SAMPLE_S16BE; + case CUBEB_SAMPLE_FLOAT32LE: + return PA_SAMPLE_FLOAT32LE; + case CUBEB_SAMPLE_FLOAT32BE: + return PA_SAMPLE_FLOAT32BE; + default: + return PA_SAMPLE_INVALID; + } +} + +static int +create_pa_stream(cubeb_stream * stm, + pa_stream ** pa_stm, + cubeb_stream_params * stream_params, + char const * stream_name) +{ + assert(stm && stream_params); + *pa_stm = NULL; + pa_sample_spec ss; + ss.format = to_pulse_format(stream_params->format); + if (ss.format == PA_SAMPLE_INVALID) + return CUBEB_ERROR_INVALID_FORMAT; + ss.rate = stream_params->rate; + ss.channels = stream_params->channels; + + *pa_stm = WRAP(pa_stream_new)(stm->context->context, stream_name, &ss, NULL); + return (*pa_stm == NULL) ? CUBEB_ERROR : CUBEB_OK; +} + +static pa_buffer_attr +set_buffering_attribute(unsigned int latency_frames, pa_sample_spec * sample_spec) +{ + pa_buffer_attr battr; + battr.maxlength = -1; + battr.prebuf = -1; + battr.tlength = latency_frames * WRAP(pa_frame_size)(sample_spec); + battr.minreq = battr.tlength / 4; + battr.fragsize = battr.minreq; + + LOG("Requested buffer attributes maxlength %u, tlength %u, prebuf %u, minreq %u, fragsize %u", + battr.maxlength, battr.tlength, battr.prebuf, battr.minreq, battr.fragsize); + + return battr; +} + +static int +pulse_stream_init(cubeb * context, + cubeb_stream ** stream, + char const * stream_name, + cubeb_devid input_device, + cubeb_stream_params * input_stream_params, + cubeb_devid output_device, + cubeb_stream_params * output_stream_params, + unsigned int latency_frames, + cubeb_data_callback data_callback, + cubeb_state_callback state_callback, + void * user_ptr) +{ + cubeb_stream * stm; + pa_buffer_attr battr; + int r; + + assert(context); + + // If the connection failed for some reason, try to reconnect + if (context->error == 1 && pulse_context_init(context) != 0) { + return CUBEB_ERROR; + } + + *stream = NULL; + + stm = calloc(1, sizeof(*stm)); + assert(stm); + + stm->context = context; + stm->data_callback = data_callback; + stm->state_callback = state_callback; + stm->user_ptr = user_ptr; + stm->volume = PULSE_NO_GAIN; + stm->state = -1; + assert(stm->shutdown == 0); + + WRAP(pa_threaded_mainloop_lock)(stm->context->mainloop); + if (output_stream_params) { + r = create_pa_stream(stm, &stm->output_stream, output_stream_params, stream_name); + if (r != CUBEB_OK) { + WRAP(pa_threaded_mainloop_unlock)(stm->context->mainloop); + pulse_stream_destroy(stm); + return r; + } + + stm->output_sample_spec = *(WRAP(pa_stream_get_sample_spec)(stm->output_stream)); + + WRAP(pa_stream_set_state_callback)(stm->output_stream, stream_state_callback, stm); + WRAP(pa_stream_set_write_callback)(stm->output_stream, stream_write_callback, stm); + + battr = set_buffering_attribute(latency_frames, &stm->output_sample_spec); + WRAP(pa_stream_connect_playback)(stm->output_stream, + output_device, + &battr, + PA_STREAM_AUTO_TIMING_UPDATE | PA_STREAM_INTERPOLATE_TIMING | + PA_STREAM_START_CORKED | PA_STREAM_ADJUST_LATENCY, + NULL, NULL); + } + + // Set up input stream + if (input_stream_params) { + r = create_pa_stream(stm, &stm->input_stream, input_stream_params, stream_name); + if (r != CUBEB_OK) { + WRAP(pa_threaded_mainloop_unlock)(stm->context->mainloop); + pulse_stream_destroy(stm); + return r; + } + + stm->input_sample_spec = *(WRAP(pa_stream_get_sample_spec)(stm->input_stream)); + + WRAP(pa_stream_set_state_callback)(stm->input_stream, stream_state_callback, stm); + WRAP(pa_stream_set_read_callback)(stm->input_stream, stream_read_callback, stm); + + battr = set_buffering_attribute(latency_frames, &stm->input_sample_spec); + WRAP(pa_stream_connect_record)(stm->input_stream, + input_device, + &battr, + PA_STREAM_AUTO_TIMING_UPDATE | PA_STREAM_INTERPOLATE_TIMING | + PA_STREAM_START_CORKED | PA_STREAM_ADJUST_LATENCY); + } + + r = wait_until_stream_ready(stm); + if (r == 0) { + /* force a timing update now, otherwise timing info does not become valid + until some point after initialization has completed. */ + r = stream_update_timing_info(stm); + } + + WRAP(pa_threaded_mainloop_unlock)(stm->context->mainloop); + + if (r != 0) { + pulse_stream_destroy(stm); + return CUBEB_ERROR; + } + + if (g_log_level) { + if (output_stream_params){ + const pa_buffer_attr * output_att; + output_att = WRAP(pa_stream_get_buffer_attr)(stm->output_stream); + LOG("Output buffer attributes maxlength %u, tlength %u, prebuf %u, minreq %u, fragsize %u",output_att->maxlength, output_att->tlength, + output_att->prebuf, output_att->minreq, output_att->fragsize); + } + + if (input_stream_params){ + const pa_buffer_attr * input_att; + input_att = WRAP(pa_stream_get_buffer_attr)(stm->input_stream); + LOG("Input buffer attributes maxlength %u, tlength %u, prebuf %u, minreq %u, fragsize %u",input_att->maxlength, input_att->tlength, + input_att->prebuf, input_att->minreq, input_att->fragsize); + } + } + + *stream = stm; + + return CUBEB_OK; +} + +static void +pulse_stream_destroy(cubeb_stream * stm) +{ + stream_cork(stm, CORK); + + WRAP(pa_threaded_mainloop_lock)(stm->context->mainloop); + if (stm->output_stream) { + + if (stm->drain_timer) { + /* there's no pa_rttime_free, so use this instead. */ + WRAP(pa_threaded_mainloop_get_api)(stm->context->mainloop)->time_free(stm->drain_timer); + } + + WRAP(pa_stream_set_state_callback)(stm->output_stream, NULL, NULL); + WRAP(pa_stream_set_write_callback)(stm->output_stream, NULL, NULL); + WRAP(pa_stream_disconnect)(stm->output_stream); + WRAP(pa_stream_unref)(stm->output_stream); + } + + if (stm->input_stream) { + WRAP(pa_stream_set_state_callback)(stm->input_stream, NULL, NULL); + WRAP(pa_stream_set_read_callback)(stm->input_stream, NULL, NULL); + WRAP(pa_stream_disconnect)(stm->input_stream); + WRAP(pa_stream_unref)(stm->input_stream); + } + WRAP(pa_threaded_mainloop_unlock)(stm->context->mainloop); + + free(stm); +} + +static void +pulse_defer_event_cb(pa_mainloop_api * a, void * userdata) +{ + (void)a; + cubeb_stream * stm = userdata; + if (stm->shutdown) { + return; + } + size_t writable_size = WRAP(pa_stream_writable_size)(stm->output_stream); + trigger_user_callback(stm->output_stream, NULL, writable_size, stm); +} + +static int +pulse_stream_start(cubeb_stream * stm) +{ + stm->shutdown = 0; + stream_cork(stm, UNCORK | NOTIFY); + + if (stm->output_stream && !stm->input_stream) { + /* On output only case need to manually call user cb once in order to make + * things roll. This is done via a defer event in order to execute it + * from PA server thread. */ + WRAP(pa_threaded_mainloop_lock)(stm->context->mainloop); + WRAP(pa_mainloop_api_once)(WRAP(pa_threaded_mainloop_get_api)(stm->context->mainloop), + pulse_defer_event_cb, stm); + WRAP(pa_threaded_mainloop_unlock)(stm->context->mainloop); + } + + return CUBEB_OK; +} + +static int +pulse_stream_stop(cubeb_stream * stm) +{ + WRAP(pa_threaded_mainloop_lock)(stm->context->mainloop); + stm->shutdown = 1; + // If draining is taking place wait to finish + while (stm->drain_timer) { + WRAP(pa_threaded_mainloop_wait)(stm->context->mainloop); + } + WRAP(pa_threaded_mainloop_unlock)(stm->context->mainloop); + + stream_cork(stm, CORK | NOTIFY); + return CUBEB_OK; +} + +static int +pulse_stream_get_position(cubeb_stream * stm, uint64_t * position) +{ + int r, in_thread; + pa_usec_t r_usec; + uint64_t bytes; + + if (!stm || !stm->output_stream) { + return CUBEB_ERROR; + } + + in_thread = WRAP(pa_threaded_mainloop_in_thread)(stm->context->mainloop); + + if (!in_thread) { + WRAP(pa_threaded_mainloop_lock)(stm->context->mainloop); + } + r = WRAP(pa_stream_get_time)(stm->output_stream, &r_usec); + if (!in_thread) { + WRAP(pa_threaded_mainloop_unlock)(stm->context->mainloop); + } + + if (r != 0) { + return CUBEB_ERROR; + } + + bytes = WRAP(pa_usec_to_bytes)(r_usec, &stm->output_sample_spec); + *position = bytes / WRAP(pa_frame_size)(&stm->output_sample_spec); + + return CUBEB_OK; +} + +static int +pulse_stream_get_latency(cubeb_stream * stm, uint32_t * latency) +{ + pa_usec_t r_usec; + int negative, r; + + if (!stm || !stm->output_stream) { + return CUBEB_ERROR; + } + + r = WRAP(pa_stream_get_latency)(stm->output_stream, &r_usec, &negative); + assert(!negative); + if (r) { + return CUBEB_ERROR; + } + + *latency = r_usec * stm->output_sample_spec.rate / PA_USEC_PER_SEC; + return CUBEB_OK; +} + +static void +volume_success(pa_context *c, int success, void *userdata) +{ + (void)success; + (void)c; + cubeb_stream * stream = userdata; + assert(success); + WRAP(pa_threaded_mainloop_signal)(stream->context->mainloop, 0); +} + +static int +pulse_stream_set_volume(cubeb_stream * stm, float volume) +{ + uint32_t index; + pa_operation * op; + pa_volume_t vol; + pa_cvolume cvol; + const pa_sample_spec * ss; + + if (!stm->output_stream) { + return CUBEB_ERROR; + } + + WRAP(pa_threaded_mainloop_lock)(stm->context->mainloop); + + while (!stm->context->default_sink_info) { + WRAP(pa_threaded_mainloop_wait)(stm->context->mainloop); + } + + /* if the pulse daemon is configured to use flat volumes, + * apply our own gain instead of changing the input volume on the sink. */ + if (stm->context->default_sink_info->flags & PA_SINK_FLAT_VOLUME) { + stm->volume = volume; + } else { + ss = WRAP(pa_stream_get_sample_spec)(stm->output_stream); + + vol = WRAP(pa_sw_volume_from_linear)(volume); + WRAP(pa_cvolume_set)(&cvol, ss->channels, vol); + + index = WRAP(pa_stream_get_index)(stm->output_stream); + + op = WRAP(pa_context_set_sink_input_volume)(stm->context->context, + index, &cvol, volume_success, + stm); + if (op) { + operation_wait(stm->context, stm->output_stream, op); + WRAP(pa_operation_unref)(op); + } + } + + WRAP(pa_threaded_mainloop_unlock)(stm->context->mainloop); + + return CUBEB_OK; +} + +static int +pulse_stream_set_panning(cubeb_stream * stream, float panning) +{ + const pa_channel_map * map; + pa_cvolume vol; + + if (!stream->output_stream) { + return CUBEB_ERROR; + } + + map = WRAP(pa_stream_get_channel_map)(stream->output_stream); + + if (!WRAP(pa_channel_map_can_balance)(map)) { + return CUBEB_ERROR; + } + + WRAP(pa_cvolume_set_balance)(&vol, map, panning); + + return CUBEB_OK; +} + +typedef struct { + char * default_sink_name; + char * default_source_name; + + cubeb_device_info ** devinfo; + uint32_t max; + uint32_t count; + cubeb * context; +} pulse_dev_list_data; + +static cubeb_device_fmt +pulse_format_to_cubeb_format(pa_sample_format_t format) +{ + switch (format) { + case PA_SAMPLE_S16LE: + return CUBEB_DEVICE_FMT_S16LE; + case PA_SAMPLE_S16BE: + return CUBEB_DEVICE_FMT_S16BE; + case PA_SAMPLE_FLOAT32LE: + return CUBEB_DEVICE_FMT_F32LE; + case PA_SAMPLE_FLOAT32BE: + return CUBEB_DEVICE_FMT_F32BE; + default: + return CUBEB_DEVICE_FMT_F32NE; + } +} + +static void +pulse_ensure_dev_list_data_list_size (pulse_dev_list_data * list_data) +{ + if (list_data->count == list_data->max) { + list_data->max += 8; + list_data->devinfo = realloc(list_data->devinfo, + sizeof(cubeb_device_info *) * list_data->max); + } +} + +static cubeb_device_state +pulse_get_state_from_sink_port(pa_sink_port_info * info) +{ + if (info != NULL) { +#if PA_CHECK_VERSION(2, 0, 0) + if (info->available == PA_PORT_AVAILABLE_NO) + return CUBEB_DEVICE_STATE_UNPLUGGED; + else /*if (info->available == PA_PORT_AVAILABLE_YES) + UNKNOWN */ +#endif + return CUBEB_DEVICE_STATE_ENABLED; + } + + return CUBEB_DEVICE_STATE_DISABLED; +} + +static void +pulse_sink_info_cb(pa_context * context, const pa_sink_info * info, + int eol, void * user_data) +{ + pulse_dev_list_data * list_data = user_data; + cubeb_device_info * devinfo; + const char * prop; + + (void)context; + + if (eol || info == NULL) + return; + + devinfo = calloc(1, sizeof(cubeb_device_info)); + + devinfo->device_id = strdup(info->name); + devinfo->devid = devinfo->device_id; + devinfo->friendly_name = strdup(info->description); + prop = WRAP(pa_proplist_gets)(info->proplist, "sysfs.path"); + if (prop) + devinfo->group_id = strdup(prop); + prop = WRAP(pa_proplist_gets)(info->proplist, "device.vendor.name"); + if (prop) + devinfo->vendor_name = strdup(prop); + + devinfo->type = CUBEB_DEVICE_TYPE_OUTPUT; + devinfo->state = pulse_get_state_from_sink_port(info->active_port); + devinfo->preferred = strcmp(info->name, list_data->default_sink_name) == 0; + + devinfo->format = CUBEB_DEVICE_FMT_ALL; + devinfo->default_format = pulse_format_to_cubeb_format(info->sample_spec.format); + devinfo->max_channels = info->channel_map.channels; + devinfo->min_rate = 1; + devinfo->max_rate = PA_RATE_MAX; + devinfo->default_rate = info->sample_spec.rate; + + devinfo->latency_lo = 0; + devinfo->latency_hi = 0; + + pulse_ensure_dev_list_data_list_size (list_data); + list_data->devinfo[list_data->count++] = devinfo; + + WRAP(pa_threaded_mainloop_signal)(list_data->context->mainloop, 0); +} + +static cubeb_device_state +pulse_get_state_from_source_port(pa_source_port_info * info) +{ + if (info != NULL) { +#if PA_CHECK_VERSION(2, 0, 0) + if (info->available == PA_PORT_AVAILABLE_NO) + return CUBEB_DEVICE_STATE_UNPLUGGED; + else /*if (info->available == PA_PORT_AVAILABLE_YES) + UNKNOWN */ +#endif + return CUBEB_DEVICE_STATE_ENABLED; + } + + return CUBEB_DEVICE_STATE_DISABLED; +} + +static void +pulse_source_info_cb(pa_context * context, const pa_source_info * info, + int eol, void * user_data) +{ + pulse_dev_list_data * list_data = user_data; + cubeb_device_info * devinfo; + const char * prop; + + (void)context; + + if (eol) + return; + + devinfo = calloc(1, sizeof(cubeb_device_info)); + + devinfo->device_id = strdup(info->name); + devinfo->devid = devinfo->device_id; + devinfo->friendly_name = strdup(info->description); + prop = WRAP(pa_proplist_gets)(info->proplist, "sysfs.path"); + if (prop) + devinfo->group_id = strdup(prop); + prop = WRAP(pa_proplist_gets)(info->proplist, "device.vendor.name"); + if (prop) + devinfo->vendor_name = strdup(prop); + + devinfo->type = CUBEB_DEVICE_TYPE_INPUT; + devinfo->state = pulse_get_state_from_source_port(info->active_port); + devinfo->preferred = strcmp(info->name, list_data->default_source_name) == 0; + + devinfo->format = CUBEB_DEVICE_FMT_ALL; + devinfo->default_format = pulse_format_to_cubeb_format(info->sample_spec.format); + devinfo->max_channels = info->channel_map.channels; + devinfo->min_rate = 1; + devinfo->max_rate = PA_RATE_MAX; + devinfo->default_rate = info->sample_spec.rate; + + devinfo->latency_lo = 0; + devinfo->latency_hi = 0; + + pulse_ensure_dev_list_data_list_size (list_data); + list_data->devinfo[list_data->count++] = devinfo; + + WRAP(pa_threaded_mainloop_signal)(list_data->context->mainloop, 0); +} + +static void +pulse_server_info_cb(pa_context * c, const pa_server_info * i, void * userdata) +{ + pulse_dev_list_data * list_data = userdata; + + (void)c; + + free(list_data->default_sink_name); + free(list_data->default_source_name); + list_data->default_sink_name = strdup(i->default_sink_name); + list_data->default_source_name = strdup(i->default_source_name); + + WRAP(pa_threaded_mainloop_signal)(list_data->context->mainloop, 0); +} + +static int +pulse_enumerate_devices(cubeb * context, cubeb_device_type type, + cubeb_device_collection ** collection) +{ + pulse_dev_list_data user_data = { NULL, NULL, NULL, 0, 0, context }; + pa_operation * o; + uint32_t i; + + WRAP(pa_threaded_mainloop_lock)(context->mainloop); + + o = WRAP(pa_context_get_server_info)(context->context, + pulse_server_info_cb, &user_data); + if (o) { + operation_wait(context, NULL, o); + WRAP(pa_operation_unref)(o); + } + + if (type & CUBEB_DEVICE_TYPE_OUTPUT) { + o = WRAP(pa_context_get_sink_info_list)(context->context, + pulse_sink_info_cb, &user_data); + if (o) { + operation_wait(context, NULL, o); + WRAP(pa_operation_unref)(o); + } + } + + if (type & CUBEB_DEVICE_TYPE_INPUT) { + o = WRAP(pa_context_get_source_info_list)(context->context, + pulse_source_info_cb, &user_data); + if (o) { + operation_wait(context, NULL, o); + WRAP(pa_operation_unref)(o); + } + } + + WRAP(pa_threaded_mainloop_unlock)(context->mainloop); + + *collection = malloc(sizeof(cubeb_device_collection) + + sizeof(cubeb_device_info *) * (user_data.count > 0 ? user_data.count - 1 : 0)); + (*collection)->count = user_data.count; + for (i = 0; i < user_data.count; i++) + (*collection)->device[i] = user_data.devinfo[i]; + + free(user_data.default_sink_name); + free(user_data.default_source_name); + free(user_data.devinfo); + return CUBEB_OK; +} + +static int +pulse_stream_get_current_device(cubeb_stream * stm, cubeb_device ** const device) +{ +#if PA_CHECK_VERSION(0, 9, 8) + *device = calloc(1, sizeof(cubeb_device)); + if (*device == NULL) + return CUBEB_ERROR; + + if (stm->input_stream) { + const char * name = WRAP(pa_stream_get_device_name)(stm->input_stream); + (*device)->input_name = (name == NULL) ? NULL : strdup(name); + } + + if (stm->output_stream) { + const char * name = WRAP(pa_stream_get_device_name)(stm->output_stream); + (*device)->output_name = (name == NULL) ? NULL : strdup(name); + } + + return CUBEB_OK; +#else + return CUBEB_ERROR_NOT_SUPPORTED; +#endif +} + +static int +pulse_stream_device_destroy(cubeb_stream * stream, + cubeb_device * device) +{ + (void)stream; + free(device->input_name); + free(device->output_name); + free(device); + return CUBEB_OK; +} + +static void +pulse_subscribe_callback(pa_context * ctx, + pa_subscription_event_type_t t, + uint32_t index, void * userdata) +{ + (void)ctx; + cubeb * context = userdata; + + switch (t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) { + case PA_SUBSCRIPTION_EVENT_SOURCE: + case PA_SUBSCRIPTION_EVENT_SINK: + + if (g_log_level) { + if ((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SOURCE && + (t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_REMOVE) { + LOG("Removing sink index %d", index); + } else if ((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SOURCE && + (t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_NEW) { + LOG("Adding sink index %d", index); + } + if ((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SINK && + (t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_REMOVE) { + LOG("Removing source index %d", index); + } else if ((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SINK && + (t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_NEW) { + LOG("Adding source index %d", index); + } + } + + if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_REMOVE || + (t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_NEW) { + context->collection_changed_callback(context, context->collection_changed_user_ptr); + } + break; + } +} + +static void +subscribe_success(pa_context *c, int success, void *userdata) +{ + (void)c; + cubeb * context = userdata; + assert(success); + WRAP(pa_threaded_mainloop_signal)(context->mainloop, 0); +} + +static int +pulse_register_device_collection_changed(cubeb * context, + cubeb_device_type devtype, + cubeb_device_collection_changed_callback collection_changed_callback, + void * user_ptr) +{ + context->collection_changed_callback = collection_changed_callback; + context->collection_changed_user_ptr = user_ptr; + + WRAP(pa_threaded_mainloop_lock)(context->mainloop); + + pa_subscription_mask_t mask; + if (context->collection_changed_callback == NULL) { + // Unregister subscription + WRAP(pa_context_set_subscribe_callback)(context->context, NULL, NULL); + mask = PA_SUBSCRIPTION_MASK_NULL; + } else { + WRAP(pa_context_set_subscribe_callback)(context->context, pulse_subscribe_callback, context); + if (devtype == CUBEB_DEVICE_TYPE_INPUT) + mask = PA_SUBSCRIPTION_MASK_SOURCE; + else if (devtype == CUBEB_DEVICE_TYPE_OUTPUT) + mask = PA_SUBSCRIPTION_MASK_SINK; + else + mask = PA_SUBSCRIPTION_MASK_SINK | PA_SUBSCRIPTION_MASK_SOURCE; + } + + pa_operation * o; + o = WRAP(pa_context_subscribe)(context->context, mask, subscribe_success, context); + if (o == NULL) { + LOG("Context subscribe failed"); + return CUBEB_ERROR; + } + operation_wait(context, NULL, o); + WRAP(pa_operation_unref)(o); + + WRAP(pa_threaded_mainloop_unlock)(context->mainloop); + + return CUBEB_OK; +} + +static struct cubeb_ops const pulse_ops = { + .init = pulse_init, + .get_backend_id = pulse_get_backend_id, + .get_max_channel_count = pulse_get_max_channel_count, + .get_min_latency = pulse_get_min_latency, + .get_preferred_sample_rate = pulse_get_preferred_sample_rate, + .enumerate_devices = pulse_enumerate_devices, + .destroy = pulse_destroy, + .stream_init = pulse_stream_init, + .stream_destroy = pulse_stream_destroy, + .stream_start = pulse_stream_start, + .stream_stop = pulse_stream_stop, + .stream_get_position = pulse_stream_get_position, + .stream_get_latency = pulse_stream_get_latency, + .stream_set_volume = pulse_stream_set_volume, + .stream_set_panning = pulse_stream_set_panning, + .stream_get_current_device = pulse_stream_get_current_device, + .stream_device_destroy = pulse_stream_device_destroy, + .stream_register_device_changed_callback = NULL, + .register_device_collection_changed = pulse_register_device_collection_changed +}; |