89 static int start_output_stream(struct alsa_stream_out *out)  in start_output_stream()  argument
91     struct alsa_audio_device *adev = out->dev;  in start_output_stream()
93     if (out->unavailable)  in start_output_stream()
99     out->write_threshold = PLAYBACK_PERIOD_COUNT * PERIOD_SIZE;  in start_output_stream()
100     out->config.start_threshold = PLAYBACK_PERIOD_START_THRESHOLD * PERIOD_SIZE;  in start_output_stream()
101     out->config.avail_min = PERIOD_SIZE;  in start_output_stream()
103 …out->pcm = pcm_open(CARD_OUT, PORT_CODEC, PCM_OUT | PCM_MMAP | PCM_NOIRQ | PCM_MONOTONIC, &out->co…  in start_output_stream()
105     if (!pcm_is_ready(out->pcm)) {  in start_output_stream()
106         ALOGE("cannot open pcm_out driver: %s", pcm_get_error(out->pcm));  in start_output_stream()
107         pcm_close(out->pcm);  in start_output_stream()
109         out->unavailable = true;  in start_output_stream()
113     adev->active_output = out;  in start_output_stream()
119     struct alsa_stream_out *out = (struct alsa_stream_out *)stream;  in out_get_sample_rate()  local
120     return out->config.rate;  in out_get_sample_rate()
143     struct alsa_stream_out *out = (struct alsa_stream_out *)stream;  in out_get_channels()  local
144     return audio_channel_out_mask_from_count(out->config.channels);  in out_get_channels()
150     struct alsa_stream_out *out = (struct alsa_stream_out *)stream;  in out_get_format()  local
151     return audio_format_from_pcm_format(out->config.format);  in out_get_format()
160 static int do_output_standby(struct alsa_stream_out *out)  in do_output_standby()  argument
162     struct alsa_audio_device *adev = out->dev;  in do_output_standby()
164     if (!out->standby) {  in do_output_standby()
165         pcm_close(out->pcm);  in do_output_standby()
166         out->pcm = NULL;  in do_output_standby()
168         out->standby = 1;  in do_output_standby()
176     struct alsa_stream_out *out = (struct alsa_stream_out *)stream;  in out_standby()  local
179     pthread_mutex_lock(&out->dev->lock);  in out_standby()
180     pthread_mutex_lock(&out->lock);  in out_standby()
181     status = do_output_standby(out);  in out_standby()
182     pthread_mutex_unlock(&out->lock);  in out_standby()
183     pthread_mutex_unlock(&out->dev->lock);  in out_standby()
196     struct alsa_stream_out *out = (struct alsa_stream_out *)stream;  in out_set_parameters()  local
197     struct alsa_audio_device *adev = out->dev;  in out_set_parameters()
208         pthread_mutex_lock(&out->lock);  in out_set_parameters()
213         pthread_mutex_unlock(&out->lock);  in out_set_parameters()
230     struct alsa_stream_out *out = (struct alsa_stream_out *)stream;  in out_get_latency()  local
231     return (PERIOD_SIZE * PLAYBACK_PERIOD_COUNT * 1000) / out->config.rate;  in out_get_latency()
245     struct alsa_stream_out *out = (struct alsa_stream_out *)stream;  in out_write()  local
246     struct alsa_audio_device *adev = out->dev;  in out_write()
255     pthread_mutex_lock(&out->lock);  in out_write()
256     if (out->standby) {  in out_write()
257         ret = start_output_stream(out);  in out_write()
262         out->standby = 0;  in out_write()
267     ret = pcm_mmap_write(out->pcm, buffer, out_frames * frame_size);  in out_write()
269         out->written += out_frames;  in out_write()
272     pthread_mutex_unlock(&out->lock);  in out_write()
293     struct alsa_stream_out *out = (struct alsa_stream_out *)stream;  in out_get_presentation_position()  local
296         if (out->pcm) {  in out_get_presentation_position()
298             if (pcm_get_htimestamp(out->pcm, &avail, timestamp) == 0) {  in out_get_presentation_position()
299                 size_t kernel_buffer_size = out->config.period_size * out->config.period_count;  in out_get_presentation_position()
300                 int64_t signed_frames = out->written - kernel_buffer_size + avail;  in out_get_presentation_position()
430     struct alsa_stream_out *out;  in adev_open_output_stream()  local
438     out = (struct alsa_stream_out *)calloc(1, sizeof(struct alsa_stream_out));  in adev_open_output_stream()
439     if (!out)  in adev_open_output_stream()
442     out->stream.common.get_sample_rate = out_get_sample_rate;  in adev_open_output_stream()
443     out->stream.common.set_sample_rate = out_set_sample_rate;  in adev_open_output_stream()
444     out->stream.common.get_buffer_size = out_get_buffer_size;  in adev_open_output_stream()
445     out->stream.common.get_channels = out_get_channels;  in adev_open_output_stream()
446     out->stream.common.get_format = out_get_format;  in adev_open_output_stream()
447     out->stream.common.set_format = out_set_format;  in adev_open_output_stream()
448     out->stream.common.standby = out_standby;  in adev_open_output_stream()
449     out->stream.common.dump = out_dump;  in adev_open_output_stream()
450     out->stream.common.set_parameters = out_set_parameters;  in adev_open_output_stream()
451     out->stream.common.get_parameters = out_get_parameters;  in adev_open_output_stream()
452     out->stream.common.add_audio_effect = out_add_audio_effect;  in adev_open_output_stream()
453     out->stream.common.remove_audio_effect = out_remove_audio_effect;  in adev_open_output_stream()
454     out->stream.get_latency = out_get_latency;  in adev_open_output_stream()
455     out->stream.set_volume = out_set_volume;  in adev_open_output_stream()
456     out->stream.write = out_write;  in adev_open_output_stream()
457     out->stream.get_render_position = out_get_render_position;  in adev_open_output_stream()
458     out->stream.get_next_write_timestamp = out_get_next_write_timestamp;  in adev_open_output_stream()
459     out->stream.get_presentation_position = out_get_presentation_position;  in adev_open_output_stream()
461     out->config.channels = CHANNEL_STEREO;  in adev_open_output_stream()
462     out->config.rate = CODEC_SAMPLING_RATE;  in adev_open_output_stream()
463     out->config.format = PCM_FORMAT_S16_LE;  in adev_open_output_stream()
464     out->config.period_size = PERIOD_SIZE;  in adev_open_output_stream()
465     out->config.period_count = PLAYBACK_PERIOD_COUNT;  in adev_open_output_stream()
467     if (out->config.rate != config->sample_rate ||  in adev_open_output_stream()
469                out->config.format !=  pcm_format_from_audio_format(config->format) ) {  in adev_open_output_stream()
470         config->sample_rate = out->config.rate;  in adev_open_output_stream()
471         config->format = audio_format_from_pcm_format(out->config.format);  in adev_open_output_stream()
477                 out->config.channels, out->config.rate, out->config.format);  in adev_open_output_stream()
479     out->dev = ladev;  in adev_open_output_stream()
480     out->standby = 1;  in adev_open_output_stream()
481     out->unavailable = false;  in adev_open_output_stream()
483     config->format = out_get_format(&out->stream.common);  in adev_open_output_stream()
484     config->channel_mask = out_get_channels(&out->stream.common);  in adev_open_output_stream()
485     config->sample_rate = out_get_sample_rate(&out->stream.common);  in adev_open_output_stream()
487     *stream_out = &out->stream;  in adev_open_output_stream()