static uint64_t mix_and_output(struct audio_output *audio, uint64_t audio_time, uint64_t prev_time) { struct audio_line *line = audio->first_line; uint32_t frames = (uint32_t)ts_diff_frames(audio, audio_time, prev_time); size_t bytes = frames * audio->block_size; #ifdef DEBUG_AUDIO blog(LOG_DEBUG, "audio_time: %llu, prev_time: %llu, bytes: %lu", audio_time, prev_time, bytes); #endif /* return an adjusted audio_time according to the amount * of data that was sampled to ensure seamless transmission */ audio_time = prev_time + conv_frames_to_time(audio, frames); /* resize and clear mix buffers */ for (size_t i = 0; i < audio->planes; i++) { da_resize(audio->mix_buffers[i], bytes); memset(audio->mix_buffers[i].array, 0, bytes); } /* mix audio lines */ while (line) { struct audio_line *next = line->next; /* if line marked for removal, destroy and move to the next */ if (!line->buffers[0].size) { if (!line->alive) { audio_output_removeline(audio, line); line = next; continue; } } pthread_mutex_lock(&line->mutex); if (line->buffers[0].size && line->base_timestamp < prev_time) { clear_excess_audio_data(line, prev_time); line->base_timestamp = prev_time; } if (mix_audio_line(audio, line, bytes, prev_time)) line->base_timestamp = audio_time; pthread_mutex_unlock(&line->mutex); line = next; } /* output */ do_audio_output(audio, prev_time, frames); return audio_time; }
static uint64_t mix_and_output(struct audio_output *audio, uint64_t audio_time, uint64_t prev_time) { struct audio_line *line = audio->first_line; uint32_t frames = (uint32_t)ts_diff_frames(audio, audio_time, prev_time); size_t bytes = frames * audio->block_size; #ifdef DEBUG_AUDIO blog(LOG_DEBUG, "audio_time: %llu, prev_time: %llu, bytes: %lu", audio_time, prev_time, bytes); #endif /* return an adjusted audio_time according to the amount * of data that was sampled to ensure seamless transmission */ audio_time = prev_time + conv_frames_to_time(audio, frames); /* resize and clear mix buffers */ for (size_t mix_idx = 0; mix_idx < MAX_AUDIO_MIXES; mix_idx++) { struct audio_mix *mix = &audio->mixes[mix_idx]; for (size_t i = 0; i < audio->planes; i++) { da_resize(mix->mix_buffers[i], bytes); memset(mix->mix_buffers[i].array, 0, bytes); } } /* mix audio lines */ while (line) { struct audio_line *next = line->next; /* if line marked for removal, destroy and move to the next */ if (!line->buffers[0].size) { if (!line->alive) { audio_output_removeline(audio, line); line = next; continue; } } pthread_mutex_lock(&line->mutex); if (line->buffers[0].size && line->base_timestamp < prev_time) { clear_excess_audio_data(line, prev_time); line->base_timestamp = prev_time; } else if (line->audio_getting_cut_off) { line->audio_getting_cut_off = false; blog(LOG_WARNING, "Audio line '%s' audio data no " "longer getting cut off.", line->name); } if (mix_audio_line(audio, line, bytes, prev_time)) line->base_timestamp = audio_time; pthread_mutex_unlock(&line->mutex); line = next; } /* clamps audio data to -1.0..1.0 */ clamp_audio_output(audio, bytes); /* output */ for (size_t i = 0; i < MAX_AUDIO_MIXES; i++) do_audio_output(audio, i, prev_time, frames); return audio_time; }