diff options
Diffstat (limited to 'media/libcubeb/src/cubeb_jack.cpp')
| -rw-r--r-- | media/libcubeb/src/cubeb_jack.cpp | 1183 |
1 files changed, 1183 insertions, 0 deletions
diff --git a/media/libcubeb/src/cubeb_jack.cpp b/media/libcubeb/src/cubeb_jack.cpp new file mode 100644 index 0000000000..b417078fc3 --- /dev/null +++ b/media/libcubeb/src/cubeb_jack.cpp @@ -0,0 +1,1183 @@ +/* + * Copyright © 2012 David Richards + * Copyright © 2013 Sebastien Alaiwan + * Copyright © 2016 Damien Zammit + * + * This program is made available under an ISC-style license. See the + * accompanying file LICENSE for details. + */ +#define _DEFAULT_SOURCE +#define _BSD_SOURCE +#if !defined(__FreeBSD__) && !defined(__NetBSD__) +#define _POSIX_SOURCE +#endif +#include "cubeb-internal.h" +#include "cubeb/cubeb.h" +#include "cubeb_resampler.h" +#include "cubeb_utils.h" +#include <dlfcn.h> +#include <limits.h> +#include <math.h> +#include <pthread.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <jack/jack.h> +#include <jack/statistics.h> + +#ifdef DISABLE_LIBJACK_DLOPEN +#define WRAP(x) x +#else +#define WRAP(x) (*api_##x) +#define JACK_API_VISIT(X) \ + X(jack_activate) \ + X(jack_client_close) \ + X(jack_client_open) \ + X(jack_connect) \ + X(jack_free) \ + X(jack_get_ports) \ + X(jack_get_sample_rate) \ + X(jack_get_xrun_delayed_usecs) \ + X(jack_get_buffer_size) \ + X(jack_port_get_buffer) \ + X(jack_port_name) \ + X(jack_port_register) \ + X(jack_port_unregister) \ + X(jack_port_get_latency_range) \ + X(jack_set_process_callback) \ + X(jack_set_xrun_callback) \ + X(jack_set_graph_order_callback) \ + X(jack_set_error_function) \ + X(jack_set_info_function) + +#define IMPORT_FUNC(x) static decltype(x) * api_##x; +JACK_API_VISIT(IMPORT_FUNC); +#undef IMPORT_FUNC +#endif + +#define JACK_DEFAULT_IN "JACK capture" +#define JACK_DEFAULT_OUT "JACK playback" + +static const int MAX_STREAMS = 16; +static const int MAX_CHANNELS = 8; +static const int FIFO_SIZE = 4096 * sizeof(float); + +enum devstream { + NONE = 0, + IN_ONLY, + OUT_ONLY, + DUPLEX, +}; + +enum cbjack_connect_ports_options { + CBJACK_CP_OPTIONS_NONE = 0x0, + CBJACK_CP_OPTIONS_SKIP_OUTPUT = 0x1, + CBJACK_CP_OPTIONS_SKIP_INPUT = 0x2, +}; + +static void +s16ne_to_float(float * dst, const int16_t * src, size_t n) +{ + for (size_t i = 0; i < n; i++) + *(dst++) = (float)((float)*(src++) / 32767.0f); +} + +static void +float_to_s16ne(int16_t * dst, float * src, size_t n) +{ + for (size_t i = 0; i < n; i++) { + if (*src > 1.f) + *src = 1.f; + if (*src < -1.f) + *src = -1.f; + *(dst++) = (int16_t)((int16_t)(*(src++) * 32767)); + } +} + +extern "C" { +/*static*/ int +jack_init(cubeb ** context, char const * context_name); +} +static char const * +cbjack_get_backend_id(cubeb * context); +static int +cbjack_get_max_channel_count(cubeb * ctx, uint32_t * max_channels); +static int +cbjack_get_min_latency(cubeb * ctx, cubeb_stream_params params, + uint32_t * latency_frames); +static int +cbjack_get_latency(cubeb_stream * stm, unsigned int * latency_frames); +static int +cbjack_get_preferred_sample_rate(cubeb * ctx, uint32_t * rate); +static void +cbjack_destroy(cubeb * context); +static void +cbjack_interleave_capture(cubeb_stream * stream, float ** in, + jack_nframes_t nframes, bool format_mismatch); +static void +cbjack_deinterleave_playback_refill_s16ne(cubeb_stream * stream, + short ** bufs_in, float ** bufs_out, + jack_nframes_t nframes); +static void +cbjack_deinterleave_playback_refill_float(cubeb_stream * stream, + float ** bufs_in, float ** bufs_out, + jack_nframes_t nframes); +static int +cbjack_stream_device_destroy(cubeb_stream * stream, cubeb_device * device); +static int +cbjack_stream_get_current_device(cubeb_stream * stm, + cubeb_device ** const device); +static int +cbjack_enumerate_devices(cubeb * context, cubeb_device_type type, + cubeb_device_collection * collection); +static int +cbjack_device_collection_destroy(cubeb * context, + cubeb_device_collection * collection); +static int +cbjack_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); +static void +cbjack_stream_destroy(cubeb_stream * stream); +static int +cbjack_stream_start(cubeb_stream * stream); +static int +cbjack_stream_stop(cubeb_stream * stream); +static int +cbjack_stream_get_position(cubeb_stream * stream, uint64_t * position); +static int +cbjack_stream_set_volume(cubeb_stream * stm, float volume); + +static struct cubeb_ops const cbjack_ops = { + .init = jack_init, + .get_backend_id = cbjack_get_backend_id, + .get_max_channel_count = cbjack_get_max_channel_count, + .get_min_latency = cbjack_get_min_latency, + .get_preferred_sample_rate = cbjack_get_preferred_sample_rate, + .get_supported_input_processing_params = NULL, + .enumerate_devices = cbjack_enumerate_devices, + .device_collection_destroy = cbjack_device_collection_destroy, + .destroy = cbjack_destroy, + .stream_init = cbjack_stream_init, + .stream_destroy = cbjack_stream_destroy, + .stream_start = cbjack_stream_start, + .stream_stop = cbjack_stream_stop, + .stream_get_position = cbjack_stream_get_position, + .stream_get_latency = cbjack_get_latency, + .stream_get_input_latency = NULL, + .stream_set_volume = cbjack_stream_set_volume, + .stream_set_name = NULL, + .stream_get_current_device = cbjack_stream_get_current_device, + .stream_set_input_mute = NULL, + .stream_set_input_processing_params = NULL, + .stream_device_destroy = cbjack_stream_device_destroy, + .stream_register_device_changed_callback = NULL, + .register_device_collection_changed = NULL}; + +struct cubeb_stream { + /* Note: Must match cubeb_stream layout in cubeb.c. */ + cubeb * context; + void * user_ptr; + /**/ + + /**< Mutex for each stream */ + pthread_mutex_t mutex; + + bool in_use; /**< Set to false iff the stream is free */ + bool ports_ready; /**< Set to true iff the JACK ports are ready */ + + cubeb_data_callback data_callback; + cubeb_state_callback state_callback; + cubeb_stream_params in_params; + cubeb_stream_params out_params; + + cubeb_resampler * resampler; + + uint64_t position; + bool pause; + float ratio; + enum devstream devs; + char stream_name[256]; + jack_port_t * output_ports[MAX_CHANNELS]; + jack_port_t * input_ports[MAX_CHANNELS]; + float volume; +}; + +struct cubeb { + struct cubeb_ops const * ops; + void * libjack; + + /**< Mutex for whole context */ + pthread_mutex_t mutex; + + /**< Audio buffers, converted to float */ + float in_float_interleaved_buffer[FIFO_SIZE * MAX_CHANNELS]; + float out_float_interleaved_buffer[FIFO_SIZE * MAX_CHANNELS]; + + /**< Audio buffer, at the sampling rate of the output */ + float in_resampled_interleaved_buffer_float[FIFO_SIZE * MAX_CHANNELS * 3]; + int16_t in_resampled_interleaved_buffer_s16ne[FIFO_SIZE * MAX_CHANNELS * 3]; + float out_resampled_interleaved_buffer_float[FIFO_SIZE * MAX_CHANNELS * 3]; + int16_t out_resampled_interleaved_buffer_s16ne[FIFO_SIZE * MAX_CHANNELS * 3]; + + cubeb_stream streams[MAX_STREAMS]; + unsigned int active_streams; + + cubeb_device_collection_changed_callback collection_changed_callback; + + bool active; + unsigned int jack_sample_rate; + unsigned int jack_latency; + unsigned int jack_xruns; + unsigned int jack_buffer_size; + unsigned int fragment_size; + unsigned int output_bytes_per_frame; + jack_client_t * jack_client; +}; + +static int +load_jack_lib(cubeb * context) +{ +#ifndef DISABLE_LIBJACK_DLOPEN +#ifdef __APPLE__ + context->libjack = dlopen("libjack.0.dylib", RTLD_LAZY); + context->libjack = dlopen("/usr/local/lib/libjack.0.dylib", RTLD_LAZY); +#elif defined(__WIN32__) +#ifdef _WIN64 + context->libjack = LoadLibrary("libjack64.dll"); +#else + context->libjack = LoadLibrary("libjack.dll"); +#endif +#else + context->libjack = dlopen("libjack.so.0", RTLD_LAZY); + if (!context->libjack) { + context->libjack = dlopen("libjack.so", RTLD_LAZY); + } +#endif + if (!context->libjack) { + return CUBEB_ERROR; + } + +#define LOAD(x) \ + { \ + api_##x = (decltype(x) *)dlsym(context->libjack, #x); \ + if (!api_##x) { \ + dlclose(context->libjack); \ + return CUBEB_ERROR; \ + } \ + } + + JACK_API_VISIT(LOAD); +#undef LOAD +#endif + return CUBEB_OK; +} + +static void +cbjack_connect_port_out(cubeb_stream * stream, const size_t out_port, + const char * const phys_in_port) +{ + const char * src_port = WRAP(jack_port_name)(stream->output_ports[out_port]); + + WRAP(jack_connect)(stream->context->jack_client, src_port, phys_in_port); +} + +static void +cbjack_connect_port_in(cubeb_stream * stream, const char * const phys_out_port, + size_t in_port) +{ + const char * src_port = WRAP(jack_port_name)(stream->input_ports[in_port]); + + WRAP(jack_connect)(stream->context->jack_client, phys_out_port, src_port); +} + +static int +cbjack_connect_ports(cubeb_stream * stream, + enum cbjack_connect_ports_options options) +{ + int r = CUBEB_ERROR; + const char ** phys_in_ports = + WRAP(jack_get_ports)(stream->context->jack_client, NULL, NULL, + JackPortIsInput | JackPortIsPhysical); + const char ** phys_out_ports = + WRAP(jack_get_ports)(stream->context->jack_client, NULL, NULL, + JackPortIsOutput | JackPortIsPhysical); + + if (phys_in_ports == NULL || *phys_in_ports == NULL || + options & CBJACK_CP_OPTIONS_SKIP_OUTPUT) { + goto skipplayback; + } + + // Connect outputs to playback + for (unsigned int c = 0; + c < stream->out_params.channels && phys_in_ports[c] != NULL; c++) { + cbjack_connect_port_out(stream, c, phys_in_ports[c]); + } + + // Special case playing mono source in stereo + if (stream->out_params.channels == 1 && phys_in_ports[1] != NULL) { + cbjack_connect_port_out(stream, 0, phys_in_ports[1]); + } + + r = CUBEB_OK; + +skipplayback: + if (phys_out_ports == NULL || *phys_out_ports == NULL || + options & CBJACK_CP_OPTIONS_SKIP_INPUT) { + goto end; + } + // Connect inputs to capture + for (unsigned int c = 0; + c < stream->in_params.channels && phys_out_ports[c] != NULL; c++) { + cbjack_connect_port_in(stream, phys_out_ports[c], c); + } + r = CUBEB_OK; +end: + if (phys_out_ports) { + WRAP(jack_free)(phys_out_ports); + } + if (phys_in_ports) { + WRAP(jack_free)(phys_in_ports); + } + return r; +} + +static int +cbjack_xrun_callback(void * arg) +{ + cubeb * ctx = (cubeb *)arg; + + float delay = WRAP(jack_get_xrun_delayed_usecs)(ctx->jack_client); + float fragments = ceilf(((delay / 1000000.0) * ctx->jack_sample_rate) / + ctx->jack_buffer_size); + + ctx->jack_xruns += (unsigned int)fragments; + return 0; +} + +static int +cbjack_graph_order_callback(void * arg) +{ + cubeb * ctx = (cubeb *)arg; + int i; + jack_latency_range_t latency_range; + jack_nframes_t port_latency, max_latency = 0; + + for (int j = 0; j < MAX_STREAMS; j++) { + cubeb_stream * stm = &ctx->streams[j]; + + if (!stm->in_use) + continue; + if (!stm->ports_ready) + continue; + + for (i = 0; i < (int)stm->out_params.channels; ++i) { + WRAP(jack_port_get_latency_range) + (stm->output_ports[i], JackPlaybackLatency, &latency_range); + port_latency = latency_range.max; + if (port_latency > max_latency) + max_latency = port_latency; + } + /* Cap minimum latency to 128 frames */ + if (max_latency < 128) + max_latency = 128; + } + + ctx->jack_latency = max_latency; + + return 0; +} + +static int +cbjack_process(jack_nframes_t nframes, void * arg) +{ + cubeb * ctx = (cubeb *)arg; + unsigned int t_jack_xruns = ctx->jack_xruns; + int i; + + ctx->jack_xruns = 0; + + for (int j = 0; j < MAX_STREAMS; j++) { + cubeb_stream * stm = &ctx->streams[j]; + float * bufs_out[stm->out_params.channels]; + float * bufs_in[stm->in_params.channels]; + + if (!stm->in_use) + continue; + + // handle xruns by skipping audio that should have been played + stm->position += t_jack_xruns * ctx->fragment_size * stm->ratio; + + if (!stm->ports_ready) + continue; + + if (stm->devs & OUT_ONLY) { + // get jack output buffers + for (i = 0; i < (int)stm->out_params.channels; i++) + bufs_out[i] = + (float *)WRAP(jack_port_get_buffer)(stm->output_ports[i], nframes); + } + if (stm->devs & IN_ONLY) { + // get jack input buffers + for (i = 0; i < (int)stm->in_params.channels; i++) + bufs_in[i] = + (float *)WRAP(jack_port_get_buffer)(stm->input_ports[i], nframes); + } + if (stm->pause) { + // paused, play silence on output + if (stm->devs & OUT_ONLY) { + for (unsigned int c = 0; c < stm->out_params.channels; c++) { + float * buffer_out = bufs_out[c]; + if (buffer_out) { + for (long f = 0; f < nframes; f++) { + buffer_out[f] = 0.f; + } + } + } + } + if (stm->devs & IN_ONLY) { + // paused, capture silence + for (unsigned int c = 0; c < stm->in_params.channels; c++) { + float * buffer_in = bufs_in[c]; + if (buffer_in) { + for (long f = 0; f < nframes; f++) { + buffer_in[f] = 0.f; + } + } + } + } + } else { + + // try to lock stream mutex + if (pthread_mutex_trylock(&stm->mutex) == 0) { + + int16_t * in_s16ne = + stm->context->in_resampled_interleaved_buffer_s16ne; + float * in_float = stm->context->in_resampled_interleaved_buffer_float; + + // unpaused, play audio + if (stm->devs == DUPLEX) { + if (stm->out_params.format == CUBEB_SAMPLE_S16NE) { + cbjack_interleave_capture(stm, bufs_in, nframes, true); + cbjack_deinterleave_playback_refill_s16ne(stm, &in_s16ne, bufs_out, + nframes); + } else if (stm->out_params.format == CUBEB_SAMPLE_FLOAT32NE) { + cbjack_interleave_capture(stm, bufs_in, nframes, false); + cbjack_deinterleave_playback_refill_float(stm, &in_float, bufs_out, + nframes); + } + } else if (stm->devs == IN_ONLY) { + if (stm->in_params.format == CUBEB_SAMPLE_S16NE) { + cbjack_interleave_capture(stm, bufs_in, nframes, true); + cbjack_deinterleave_playback_refill_s16ne(stm, &in_s16ne, nullptr, + nframes); + } else if (stm->in_params.format == CUBEB_SAMPLE_FLOAT32NE) { + cbjack_interleave_capture(stm, bufs_in, nframes, false); + cbjack_deinterleave_playback_refill_float(stm, &in_float, nullptr, + nframes); + } + } else if (stm->devs == OUT_ONLY) { + if (stm->out_params.format == CUBEB_SAMPLE_S16NE) { + cbjack_deinterleave_playback_refill_s16ne(stm, nullptr, bufs_out, + nframes); + } else if (stm->out_params.format == CUBEB_SAMPLE_FLOAT32NE) { + cbjack_deinterleave_playback_refill_float(stm, nullptr, bufs_out, + nframes); + } + } + // unlock stream mutex + pthread_mutex_unlock(&stm->mutex); + + } else { + // could not lock mutex + // output silence + if (stm->devs & OUT_ONLY) { + for (unsigned int c = 0; c < stm->out_params.channels; c++) { + float * buffer_out = bufs_out[c]; + if (buffer_out) { + for (long f = 0; f < nframes; f++) { + buffer_out[f] = 0.f; + } + } + } + } + if (stm->devs & IN_ONLY) { + // capture silence + for (unsigned int c = 0; c < stm->in_params.channels; c++) { + float * buffer_in = bufs_in[c]; + if (buffer_in) { + for (long f = 0; f < nframes; f++) { + buffer_in[f] = 0.f; + } + } + } + } + } + } + } + return 0; +} + +static void +cbjack_deinterleave_playback_refill_float(cubeb_stream * stream, float ** in, + float ** bufs_out, + jack_nframes_t nframes) +{ + float * out_interleaved_buffer = nullptr; + + float * inptr = (in != NULL) ? *in : nullptr; + float * outptr = (bufs_out != NULL) ? *bufs_out : nullptr; + + long needed_frames = (bufs_out != NULL) ? nframes : 0; + long done_frames = 0; + long input_frames_count = (in != NULL) ? nframes : 0; + + done_frames = cubeb_resampler_fill( + stream->resampler, inptr, &input_frames_count, + (bufs_out != NULL) + ? stream->context->out_resampled_interleaved_buffer_float + : NULL, + needed_frames); + + out_interleaved_buffer = + stream->context->out_resampled_interleaved_buffer_float; + + if (outptr) { + // convert interleaved output buffers to contiguous buffers + for (unsigned int c = 0; c < stream->out_params.channels; c++) { + float * buffer = bufs_out[c]; + for (long f = 0; f < done_frames; f++) { + if (buffer) { + buffer[f] = + out_interleaved_buffer[(f * stream->out_params.channels) + c] * + stream->volume; + } + } + if (done_frames < needed_frames) { + // draining + for (long f = done_frames; f < needed_frames; f++) { + if (buffer) { + buffer[f] = 0.f; + } + } + } + if (done_frames == 0) { + // stop, but first zero out the existing buffer + for (long f = 0; f < needed_frames; f++) { + if (buffer) { + buffer[f] = 0.f; + } + } + } + } + } + + if (done_frames >= 0 && done_frames < needed_frames) { + // set drained + stream->state_callback(stream, stream->user_ptr, CUBEB_STATE_DRAINED); + // stop stream + cbjack_stream_stop(stream); + } + if (done_frames > 0 && done_frames <= needed_frames) { + // advance stream position + stream->position += done_frames * stream->ratio; + } + if (done_frames < 0 || done_frames > needed_frames) { + // stream error + stream->state_callback(stream, stream->user_ptr, CUBEB_STATE_ERROR); + } +} + +static void +cbjack_deinterleave_playback_refill_s16ne(cubeb_stream * stream, short ** in, + float ** bufs_out, + jack_nframes_t nframes) +{ + float * out_interleaved_buffer = nullptr; + + short * inptr = (in != NULL) ? *in : nullptr; + float * outptr = (bufs_out != NULL) ? *bufs_out : nullptr; + + long needed_frames = (bufs_out != NULL) ? nframes : 0; + long done_frames = 0; + long input_frames_count = (in != NULL) ? nframes : 0; + + done_frames = cubeb_resampler_fill( + stream->resampler, inptr, &input_frames_count, + (bufs_out != NULL) + ? stream->context->out_resampled_interleaved_buffer_s16ne + : NULL, + needed_frames); + + s16ne_to_float(stream->context->out_resampled_interleaved_buffer_float, + stream->context->out_resampled_interleaved_buffer_s16ne, + done_frames * stream->out_params.channels); + + out_interleaved_buffer = + stream->context->out_resampled_interleaved_buffer_float; + + if (outptr) { + // convert interleaved output buffers to contiguous buffers + for (unsigned int c = 0; c < stream->out_params.channels; c++) { + float * buffer = bufs_out[c]; + for (long f = 0; f < done_frames; f++) { + buffer[f] = + out_interleaved_buffer[(f * stream->out_params.channels) + c] * + stream->volume; + } + if (done_frames < needed_frames) { + // draining + for (long f = done_frames; f < needed_frames; f++) { + buffer[f] = 0.f; + } + } + if (done_frames == 0) { + // stop, but first zero out the existing buffer + for (long f = 0; f < needed_frames; f++) { + buffer[f] = 0.f; + } + } + } + } + + if (done_frames >= 0 && done_frames < needed_frames) { + // set drained + stream->state_callback(stream, stream->user_ptr, CUBEB_STATE_DRAINED); + // stop stream + cbjack_stream_stop(stream); + } + if (done_frames > 0 && done_frames <= needed_frames) { + // advance stream position + stream->position += done_frames * stream->ratio; + } + if (done_frames < 0 || done_frames > needed_frames) { + // stream error + stream->state_callback(stream, stream->user_ptr, CUBEB_STATE_ERROR); + } +} + +static void +cbjack_interleave_capture(cubeb_stream * stream, float ** in, + jack_nframes_t nframes, bool format_mismatch) +{ + float * in_buffer = stream->context->in_float_interleaved_buffer; + + for (unsigned int c = 0; c < stream->in_params.channels; c++) { + for (long f = 0; f < nframes; f++) { + in_buffer[(f * stream->in_params.channels) + c] = + in[c][f] * stream->volume; + } + } + if (format_mismatch) { + float_to_s16ne(stream->context->in_resampled_interleaved_buffer_s16ne, + in_buffer, nframes * stream->in_params.channels); + } else { + memset(stream->context->in_resampled_interleaved_buffer_float, 0, + (FIFO_SIZE * MAX_CHANNELS * 3) * sizeof(float)); + memcpy(stream->context->in_resampled_interleaved_buffer_float, in_buffer, + (FIFO_SIZE * MAX_CHANNELS * 2) * sizeof(float)); + } +} + +static void +silent_jack_error_callback(char const * /*msg*/) +{ +} + +/*static*/ int +jack_init(cubeb ** context, char const * context_name) +{ + int r; + + *context = NULL; + + cubeb * ctx = (cubeb *)calloc(1, sizeof(*ctx)); + if (ctx == NULL) { + return CUBEB_ERROR; + } + + r = load_jack_lib(ctx); + if (r != 0) { + cbjack_destroy(ctx); + return CUBEB_ERROR; + } + + WRAP(jack_set_error_function)(silent_jack_error_callback); + WRAP(jack_set_info_function)(silent_jack_error_callback); + + ctx->ops = &cbjack_ops; + + ctx->mutex = PTHREAD_MUTEX_INITIALIZER; + for (r = 0; r < MAX_STREAMS; r++) { + ctx->streams[r].mutex = PTHREAD_MUTEX_INITIALIZER; + } + + const char * jack_client_name = "cubeb"; + if (context_name) + jack_client_name = context_name; + + ctx->jack_client = + WRAP(jack_client_open)(jack_client_name, JackNoStartServer, NULL); + + if (ctx->jack_client == NULL) { + cbjack_destroy(ctx); + return CUBEB_ERROR; + } + + ctx->jack_xruns = 0; + + WRAP(jack_set_process_callback)(ctx->jack_client, cbjack_process, ctx); + WRAP(jack_set_xrun_callback)(ctx->jack_client, cbjack_xrun_callback, ctx); + WRAP(jack_set_graph_order_callback) + (ctx->jack_client, cbjack_graph_order_callback, ctx); + + if (WRAP(jack_activate)(ctx->jack_client)) { + cbjack_destroy(ctx); + return CUBEB_ERROR; + } + + ctx->jack_sample_rate = WRAP(jack_get_sample_rate)(ctx->jack_client); + ctx->jack_latency = 128 * 1000 / ctx->jack_sample_rate; + + ctx->active = true; + *context = ctx; + + return CUBEB_OK; +} + +static char const * +cbjack_get_backend_id(cubeb * /*context*/) +{ + return "jack"; +} + +static int +cbjack_get_max_channel_count(cubeb * /*ctx*/, uint32_t * max_channels) +{ + *max_channels = MAX_CHANNELS; + return CUBEB_OK; +} + +static int +cbjack_get_latency(cubeb_stream * stm, unsigned int * latency_ms) +{ + *latency_ms = stm->context->jack_latency; + return CUBEB_OK; +} + +static int +cbjack_get_min_latency(cubeb * ctx, cubeb_stream_params /*params*/, + uint32_t * latency_ms) +{ + *latency_ms = ctx->jack_latency; + return CUBEB_OK; +} + +static int +cbjack_get_preferred_sample_rate(cubeb * ctx, uint32_t * rate) +{ + if (!ctx->jack_client) { + jack_client_t * testclient = + WRAP(jack_client_open)("test-samplerate", JackNoStartServer, NULL); + if (!testclient) { + return CUBEB_ERROR; + } + + *rate = WRAP(jack_get_sample_rate)(testclient); + WRAP(jack_client_close)(testclient); + + } else { + *rate = WRAP(jack_get_sample_rate)(ctx->jack_client); + } + return CUBEB_OK; +} + +static void +cbjack_destroy(cubeb * context) +{ + context->active = false; + + if (context->jack_client != NULL) + WRAP(jack_client_close)(context->jack_client); +#ifndef DISABLE_LIBJACK_DLOPEN + if (context->libjack) + dlclose(context->libjack); +#endif + free(context); +} + +static cubeb_stream * +context_alloc_stream(cubeb * context, char const * stream_name) +{ + for (int i = 0; i < MAX_STREAMS; i++) { + if (!context->streams[i].in_use) { + cubeb_stream * stm = &context->streams[i]; + stm->in_use = true; + snprintf(stm->stream_name, 255, "%s_%u", stream_name, i); + return stm; + } + } + return NULL; +} + +static int +cbjack_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) +{ + int stream_actual_rate = 0; + int jack_rate = WRAP(jack_get_sample_rate)(context->jack_client); + + if (output_stream_params && + (output_stream_params->format != CUBEB_SAMPLE_FLOAT32NE && + output_stream_params->format != CUBEB_SAMPLE_S16NE)) { + return CUBEB_ERROR_INVALID_FORMAT; + } + + if (input_stream_params && + (input_stream_params->format != CUBEB_SAMPLE_FLOAT32NE && + input_stream_params->format != CUBEB_SAMPLE_S16NE)) { + return CUBEB_ERROR_INVALID_FORMAT; + } + + if ((input_device && input_device != JACK_DEFAULT_IN) || + (output_device && output_device != JACK_DEFAULT_OUT)) { + return CUBEB_ERROR_NOT_SUPPORTED; + } + + // Loopback is unsupported + if ((input_stream_params && + (input_stream_params->prefs & CUBEB_STREAM_PREF_LOOPBACK)) || + (output_stream_params && + (output_stream_params->prefs & CUBEB_STREAM_PREF_LOOPBACK))) { + return CUBEB_ERROR_NOT_SUPPORTED; + } + + *stream = NULL; + + // Find a free stream. + pthread_mutex_lock(&context->mutex); + cubeb_stream * stm = context_alloc_stream(context, stream_name); + + // No free stream? + if (stm == NULL) { + pthread_mutex_unlock(&context->mutex); + return CUBEB_ERROR; + } + + // unlock context mutex + pthread_mutex_unlock(&context->mutex); + + // Lock active stream + pthread_mutex_lock(&stm->mutex); + + stm->ports_ready = false; + stm->user_ptr = user_ptr; + stm->context = context; + stm->devs = NONE; + if (output_stream_params && !input_stream_params) { + stm->out_params = *output_stream_params; + stream_actual_rate = stm->out_params.rate; + stm->out_params.rate = jack_rate; + stm->devs = OUT_ONLY; + if (stm->out_params.format == CUBEB_SAMPLE_FLOAT32NE) { + context->output_bytes_per_frame = sizeof(float); + } else { + context->output_bytes_per_frame = sizeof(short); + } + } + if (input_stream_params && output_stream_params) { + stm->in_params = *input_stream_params; + stm->out_params = *output_stream_params; + stream_actual_rate = stm->out_params.rate; + stm->in_params.rate = jack_rate; + stm->out_params.rate = jack_rate; + stm->devs = DUPLEX; + if (stm->out_params.format == CUBEB_SAMPLE_FLOAT32NE) { + context->output_bytes_per_frame = sizeof(float); + stm->in_params.format = CUBEB_SAMPLE_FLOAT32NE; + } else { + context->output_bytes_per_frame = sizeof(short); + stm->in_params.format = CUBEB_SAMPLE_S16NE; + } + } else if (input_stream_params && !output_stream_params) { + stm->in_params = *input_stream_params; + stream_actual_rate = stm->in_params.rate; + stm->in_params.rate = jack_rate; + stm->devs = IN_ONLY; + if (stm->in_params.format == CUBEB_SAMPLE_FLOAT32NE) { + context->output_bytes_per_frame = sizeof(float); + } else { + context->output_bytes_per_frame = sizeof(short); + } + } + + stm->ratio = (float)stream_actual_rate / (float)jack_rate; + + stm->data_callback = data_callback; + stm->state_callback = state_callback; + stm->position = 0; + stm->volume = 1.0f; + context->jack_buffer_size = WRAP(jack_get_buffer_size)(context->jack_client); + context->fragment_size = context->jack_buffer_size; + + if (stm->devs == NONE) { + pthread_mutex_unlock(&stm->mutex); + return CUBEB_ERROR; + } + + stm->resampler = NULL; + + if (stm->devs == DUPLEX) { + stm->resampler = cubeb_resampler_create( + stm, &stm->in_params, &stm->out_params, stream_actual_rate, + stm->data_callback, stm->user_ptr, CUBEB_RESAMPLER_QUALITY_DESKTOP, + CUBEB_RESAMPLER_RECLOCK_NONE); + } else if (stm->devs == IN_ONLY) { + stm->resampler = cubeb_resampler_create( + stm, &stm->in_params, nullptr, stream_actual_rate, stm->data_callback, + stm->user_ptr, CUBEB_RESAMPLER_QUALITY_DESKTOP, + CUBEB_RESAMPLER_RECLOCK_NONE); + } else if (stm->devs == OUT_ONLY) { + stm->resampler = cubeb_resampler_create( + stm, nullptr, &stm->out_params, stream_actual_rate, stm->data_callback, + stm->user_ptr, CUBEB_RESAMPLER_QUALITY_DESKTOP, + CUBEB_RESAMPLER_RECLOCK_NONE); + } + + if (!stm->resampler) { + stm->in_use = false; + pthread_mutex_unlock(&stm->mutex); + return CUBEB_ERROR; + } + + if (stm->devs == DUPLEX || stm->devs == OUT_ONLY) { + for (unsigned int c = 0; c < stm->out_params.channels; c++) { + char portname[256]; + snprintf(portname, 255, "%s_out_%d", stm->stream_name, c); + stm->output_ports[c] = WRAP(jack_port_register)( + stm->context->jack_client, portname, JACK_DEFAULT_AUDIO_TYPE, + JackPortIsOutput, 0); + if (!(output_stream_params->prefs & + CUBEB_STREAM_PREF_JACK_NO_AUTO_CONNECT)) { + if (cbjack_connect_ports(stm, CBJACK_CP_OPTIONS_SKIP_INPUT) != + CUBEB_OK) { + pthread_mutex_unlock(&stm->mutex); + cbjack_stream_destroy(stm); + return CUBEB_ERROR; + } + } + } + } + + if (stm->devs == DUPLEX || stm->devs == IN_ONLY) { + for (unsigned int c = 0; c < stm->in_params.channels; c++) { + char portname[256]; + snprintf(portname, 255, "%s_in_%d", stm->stream_name, c); + stm->input_ports[c] = + WRAP(jack_port_register)(stm->context->jack_client, portname, + JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0); + if (!(input_stream_params->prefs & + CUBEB_STREAM_PREF_JACK_NO_AUTO_CONNECT)) { + if (cbjack_connect_ports(stm, CBJACK_CP_OPTIONS_SKIP_OUTPUT) != + CUBEB_OK) { + pthread_mutex_unlock(&stm->mutex); + cbjack_stream_destroy(stm); + return CUBEB_ERROR; + } + } + } + } + + *stream = stm; + + stm->ports_ready = true; + stm->pause = true; + pthread_mutex_unlock(&stm->mutex); + + return CUBEB_OK; +} + +static void +cbjack_stream_destroy(cubeb_stream * stream) +{ + pthread_mutex_lock(&stream->mutex); + stream->ports_ready = false; + + if (stream->devs == DUPLEX || stream->devs == OUT_ONLY) { + for (unsigned int c = 0; c < stream->out_params.channels; c++) { + if (stream->output_ports[c]) { + WRAP(jack_port_unregister) + (stream->context->jack_client, stream->output_ports[c]); + stream->output_ports[c] = NULL; + } + } + } + + if (stream->devs == DUPLEX || stream->devs == IN_ONLY) { + for (unsigned int c = 0; c < stream->in_params.channels; c++) { + if (stream->input_ports[c]) { + WRAP(jack_port_unregister) + (stream->context->jack_client, stream->input_ports[c]); + stream->input_ports[c] = NULL; + } + } + } + + if (stream->resampler) { + cubeb_resampler_destroy(stream->resampler); + stream->resampler = NULL; + } + stream->in_use = false; + pthread_mutex_unlock(&stream->mutex); +} + +static int +cbjack_stream_start(cubeb_stream * stream) +{ + stream->pause = false; + stream->state_callback(stream, stream->user_ptr, CUBEB_STATE_STARTED); + return CUBEB_OK; +} + +static int +cbjack_stream_stop(cubeb_stream * stream) +{ + stream->pause = true; + stream->state_callback(stream, stream->user_ptr, CUBEB_STATE_STOPPED); + return CUBEB_OK; +} + +static int +cbjack_stream_get_position(cubeb_stream * stream, uint64_t * position) +{ + *position = stream->position; + return CUBEB_OK; +} + +static int +cbjack_stream_set_volume(cubeb_stream * stm, float volume) +{ + stm->volume = volume; + return CUBEB_OK; +} + +static int +cbjack_stream_get_current_device(cubeb_stream * stm, + cubeb_device ** const device) +{ + *device = (cubeb_device *)calloc(1, sizeof(cubeb_device)); + if (*device == NULL) + return CUBEB_ERROR; + + const char * j_in = JACK_DEFAULT_IN; + const char * j_out = JACK_DEFAULT_OUT; + const char * empty = ""; + + if (stm->devs == DUPLEX) { + (*device)->input_name = strdup(j_in); + (*device)->output_name = strdup(j_out); + } else if (stm->devs == IN_ONLY) { + (*device)->input_name = strdup(j_in); + (*device)->output_name = strdup(empty); + } else if (stm->devs == OUT_ONLY) { + (*device)->input_name = strdup(empty); + (*device)->output_name = strdup(j_out); + } + + return CUBEB_OK; +} + +static int +cbjack_stream_device_destroy(cubeb_stream * /*stream*/, cubeb_device * device) +{ + if (device->input_name) + free(device->input_name); + if (device->output_name) + free(device->output_name); + free(device); + return CUBEB_OK; +} + +static int +cbjack_enumerate_devices(cubeb * context, cubeb_device_type type, + cubeb_device_collection * collection) +{ + if (!context) + return CUBEB_ERROR; + + uint32_t rate; + cbjack_get_preferred_sample_rate(context, &rate); + + cubeb_device_info * devices = new cubeb_device_info[2]; + if (!devices) + return CUBEB_ERROR; + PodZero(devices, 2); + collection->count = 0; + + if (type & CUBEB_DEVICE_TYPE_OUTPUT) { + cubeb_device_info * cur = &devices[collection->count]; + cur->device_id = JACK_DEFAULT_OUT; + cur->devid = (cubeb_devid)cur->device_id; + cur->friendly_name = JACK_DEFAULT_OUT; + cur->group_id = JACK_DEFAULT_OUT; + cur->vendor_name = JACK_DEFAULT_OUT; + cur->type = CUBEB_DEVICE_TYPE_OUTPUT; + cur->state = CUBEB_DEVICE_STATE_ENABLED; + cur->preferred = CUBEB_DEVICE_PREF_ALL; + cur->format = CUBEB_DEVICE_FMT_F32NE; + cur->default_format = CUBEB_DEVICE_FMT_F32NE; + cur->max_channels = MAX_CHANNELS; + cur->min_rate = rate; + cur->max_rate = rate; + cur->default_rate = rate; + cur->latency_lo = 0; + cur->latency_hi = 0; + collection->count += 1; + } + + if (type & CUBEB_DEVICE_TYPE_INPUT) { + cubeb_device_info * cur = &devices[collection->count]; + cur->device_id = JACK_DEFAULT_IN; + cur->devid = (cubeb_devid)cur->device_id; + cur->friendly_name = JACK_DEFAULT_IN; + cur->group_id = JACK_DEFAULT_IN; + cur->vendor_name = JACK_DEFAULT_IN; + cur->type = CUBEB_DEVICE_TYPE_INPUT; + cur->state = CUBEB_DEVICE_STATE_ENABLED; + cur->preferred = CUBEB_DEVICE_PREF_ALL; + cur->format = CUBEB_DEVICE_FMT_F32NE; + cur->default_format = CUBEB_DEVICE_FMT_F32NE; + cur->max_channels = MAX_CHANNELS; + cur->min_rate = rate; + cur->max_rate = rate; + cur->default_rate = rate; + cur->latency_lo = 0; + cur->latency_hi = 0; + collection->count += 1; + } + + collection->device = devices; + + return CUBEB_OK; +} + +static int +cbjack_device_collection_destroy(cubeb * /*ctx*/, + cubeb_device_collection * collection) +{ + XASSERT(collection); + delete[] collection->device; + return CUBEB_OK; +} |