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;
}
