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author | Lukasz Marek <lukasz.m.luki@gmail.com> | 2014-02-25 04:03:56 +0400 |
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committer | Lukasz Marek <lukasz.m.luki@gmail.com> | 2014-03-29 12:48:56 +0400 |
commit | 85ed32d2ed15888052a4f55d878f7cfb192d0e0d (patch) | |
tree | 8382e6b14d5b90925b5f43f10ad2ca1b6093a43b /libavdevice/pulse_audio_common.c | |
parent | cd50a44beb01582093b8115287cb51a7feb83f77 (diff) |
lavd/pulse_audio_common: add device detecting code
Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>
Diffstat (limited to 'libavdevice/pulse_audio_common.c')
-rw-r--r-- | libavdevice/pulse_audio_common.c | 177 |
1 files changed, 176 insertions, 1 deletions
diff --git a/libavdevice/pulse_audio_common.c b/libavdevice/pulse_audio_common.c index f7227f6549..cfe97bc7cb 100644 --- a/libavdevice/pulse_audio_common.c +++ b/libavdevice/pulse_audio_common.c @@ -1,5 +1,6 @@ /* - * Pulseaudio input + * Pulseaudio common + * Copyright (c) 2014 Lukasz Marek * Copyright (c) 2011 Luca Barbato <lu_zero@gentoo.org> * * This file is part of FFmpeg. @@ -21,6 +22,8 @@ #include "pulse_audio_common.h" #include "libavutil/attributes.h" +#include "libavutil/avstring.h" +#include "libavutil/mem.h" pa_sample_format_t av_cold ff_codec_id_to_pulse_format(enum AVCodecID codec_id) { @@ -39,3 +42,175 @@ pa_sample_format_t av_cold ff_codec_id_to_pulse_format(enum AVCodecID codec_id) default: return PA_SAMPLE_INVALID; } } + +enum PulseAudioLoopState { + PA_LOOP_INITIALIZING, + PA_LOOP_READY, + PA_LOOP_FINISHED +}; + +typedef struct PulseAudioDeviceList { + AVDeviceInfoList *devices; + int error_code; + int output; + char *default_device; +} PulseAudioDeviceList; + +static void pa_state_cb(pa_context *c, void *userdata) +{ + enum PulseAudioLoopState *loop_status = userdata; + + switch (pa_context_get_state(c)) { + case PA_CONTEXT_FAILED: + case PA_CONTEXT_TERMINATED: + *loop_status = PA_LOOP_FINISHED; + break; + case PA_CONTEXT_READY: + *loop_status = PA_LOOP_READY; + break; + default: + break; + } +} + +static void pulse_add_detected_device(PulseAudioDeviceList *info, + const char *name, const char *description) +{ + int ret; + AVDeviceInfo *new_device = NULL; + + if (info->error_code) + return; + + new_device = av_mallocz(sizeof(AVDeviceInfo)); + if (!new_device) { + info->error_code = AVERROR(ENOMEM); + return; + } + + new_device->device_description = av_strdup(description); + new_device->device_name = av_strdup(name); + + if (!new_device->device_description || !new_device->device_name) { + info->error_code = AVERROR(ENOMEM); + goto fail; + } + + if ((ret = av_dynarray_add_nofree(&info->devices->devices, + &info->devices->nb_devices, new_device)) < 0) { + info->error_code = ret; + goto fail; + } + return; + + fail: + av_free(new_device->device_description); + av_free(new_device->device_name); + av_free(new_device); + +} + +static void pulse_audio_source_device_cb(pa_context *c, const pa_source_info *dev, + int eol, void *userdata) +{ + if (!eol) + pulse_add_detected_device(userdata, dev->name, dev->description); +} + +static void pulse_audio_sink_device_cb(pa_context *c, const pa_sink_info *dev, + int eol, void *userdata) +{ + if (!eol) + pulse_add_detected_device(userdata, dev->name, dev->description); +} + +static void pulse_server_info_cb(pa_context *c, const pa_server_info *i, void *userdata) +{ + PulseAudioDeviceList *info = userdata; + if (info->output) + info->default_device = av_strdup(i->default_sink_name); + else + info->default_device = av_strdup(i->default_source_name); + if (!info->default_device) + info->error_code = AVERROR(ENOMEM); +} + +int ff_pulse_audio_get_devices(AVDeviceInfoList *devices, const char *server, int output) +{ + pa_mainloop *pa_ml = NULL; + pa_mainloop_api *pa_mlapi = NULL; + pa_operation *pa_op = NULL; + pa_context *pa_ctx = NULL; + enum pa_operation_state op_state; + enum PulseAudioLoopState loop_state = PA_LOOP_INITIALIZING; + PulseAudioDeviceList dev_list = { 0 }; + int i; + + dev_list.output = output; + dev_list.devices = devices; + devices->nb_devices = 0; + devices->devices = NULL; + if (!devices) + return AVERROR(EINVAL); + if (!(pa_ml = pa_mainloop_new())) + return AVERROR(ENOMEM); + if (!(pa_mlapi = pa_mainloop_get_api(pa_ml))) { + dev_list.error_code = AVERROR_EXTERNAL; + goto fail; + } + if (!(pa_ctx = pa_context_new(pa_mlapi, "Query devices"))) { + dev_list.error_code = AVERROR(ENOMEM); + goto fail; + } + pa_context_set_state_callback(pa_ctx, pa_state_cb, &loop_state); + if (pa_context_connect(pa_ctx, server, 0, NULL) < 0) { + dev_list.error_code = AVERROR_EXTERNAL; + goto fail; + } + + while (loop_state == PA_LOOP_INITIALIZING) + pa_mainloop_iterate(pa_ml, 1, NULL); + if (loop_state == PA_LOOP_FINISHED) { + dev_list.error_code = AVERROR_EXTERNAL; + goto fail; + } + + if (output) + pa_op = pa_context_get_sink_info_list(pa_ctx, pulse_audio_sink_device_cb, &dev_list); + else + pa_op = pa_context_get_source_info_list(pa_ctx, pulse_audio_source_device_cb, &dev_list); + while ((op_state = pa_operation_get_state(pa_op)) == PA_OPERATION_RUNNING) + pa_mainloop_iterate(pa_ml, 1, NULL); + if (op_state != PA_OPERATION_DONE) + dev_list.error_code = AVERROR_EXTERNAL; + pa_operation_unref(pa_op); + if (dev_list.error_code < 0) + goto fail; + + pa_op = pa_context_get_server_info(pa_ctx, pulse_server_info_cb, &dev_list); + while ((op_state = pa_operation_get_state(pa_op)) == PA_OPERATION_RUNNING) + pa_mainloop_iterate(pa_ml, 1, NULL); + if (op_state != PA_OPERATION_DONE) + dev_list.error_code = AVERROR_EXTERNAL; + pa_operation_unref(pa_op); + if (dev_list.error_code < 0) + goto fail; + + devices->default_device = -1; + for (i = 0; i < devices->nb_devices; i++) { + if (!strcmp(devices->devices[i]->device_name, dev_list.default_device)) { + devices->default_device = i; + break; + } + } + + fail: + av_free(dev_list.default_device); + if(pa_ctx) + pa_context_disconnect(pa_ctx); + if (pa_ctx) + pa_context_unref(pa_ctx); + if (pa_ml) + pa_mainloop_free(pa_ml); + return dev_list.error_code; +} |