static void obs_source_destroy(obs_source_t source)
{
size_t i;
if (source->filter_parent)
obs_source_filter_remove(source->filter_parent, source);
for (i = 0; i < source->filters.num; i++)
obs_source_release(source->filters.array[i]);
for (i = 0; i < source->audio_wait_buffer.num; i++)
audiobuf_free(source->audio_wait_buffer.array+i);
for (i = 0; i < source->video_frames.num; i++)
source_frame_destroy(source->video_frames.array[i]);
gs_entercontext(obs->video.graphics);
texture_destroy(source->output_texture);
gs_leavecontext();
if (source->data)
source->callbacks.destroy(source->data);
bfree(source->audio_data.data);
audio_line_destroy(source->audio_line);
audio_resampler_destroy(source->resampler);
da_free(source->video_frames);
da_free(source->audio_wait_buffer);
da_free(source->filters);
pthread_mutex_destroy(&source->filter_mutex);
pthread_mutex_destroy(&source->audio_mutex);
pthread_mutex_destroy(&source->video_mutex);
dstr_free(&source->settings);
bfree(source);
}
void obs_source_releaseframe(obs_source_t source, struct source_frame *frame)
{
if (frame) {
source_frame_destroy(frame);
obs_source_release(source);
}
}
/*
* Ensures that cached frames are displayed on time. If multiple frames
* were cached between renders, then releases the unnecessary frames and uses
* the frame with the closest timing to ensure sync.
*/
struct source_frame *obs_source_getframe(obs_source_t source)
{
uint64_t last_frame_time = source->last_frame_timestamp;
struct source_frame *frame = NULL;
struct source_frame *next_frame;
uint64_t sys_time, frame_time;
pthread_mutex_lock(&source->video_mutex);
if (!source->video_frames.num)
goto unlock;
next_frame = source->video_frames.array[0];
sys_time = os_gettime_ns();
frame_time = next_frame->timestamp;
if (!source->last_frame_timestamp) {
frame = next_frame;
da_erase(source->video_frames, 0);
source->last_frame_timestamp = frame_time;
} else {
uint64_t sys_offset, frame_offset;
sys_offset = sys_time - source->last_sys_timestamp;
frame_offset = frame_time - last_frame_time;
source->last_frame_timestamp += sys_offset;
while (frame_offset <= sys_offset) {
if (frame)
source_frame_destroy(frame);
frame = next_frame;
da_erase(source->video_frames, 0);
if (!source->video_frames.num)
break;
next_frame = source->video_frames.array[0];
frame_time = next_frame->timestamp;
frame_offset = frame_time - last_frame_time;
}
}
source->last_sys_timestamp = sys_time;
unlock:
pthread_mutex_unlock(&source->video_mutex);
if (frame != NULL)
obs_source_addref(source);
return frame;
}
void obs_source_destroy(struct obs_source *source)
{
size_t i;
if (!source)
return;
obs_context_data_remove(&source->context);
obs_source_dosignal(source, "source_destroy", "destroy");
if (source->context.data)
source->info.destroy(source->context.data);
if (source->filter_parent)
obs_source_filter_remove(source->filter_parent, source);
for (i = 0; i < source->filters.num; i++)
obs_source_release(source->filters.array[i]);
for (i = 0; i < source->video_frames.num; i++)
source_frame_destroy(source->video_frames.array[i]);
gs_entercontext(obs->video.graphics);
texrender_destroy(source->async_convert_texrender);
texture_destroy(source->async_texture);
gs_leavecontext();
for (i = 0; i < MAX_AV_PLANES; i++)
bfree(source->audio_data.data[i]);
audio_line_destroy(source->audio_line);
audio_resampler_destroy(source->resampler);
texrender_destroy(source->filter_texrender);
da_free(source->video_frames);
da_free(source->filters);
pthread_mutex_destroy(&source->filter_mutex);
pthread_mutex_destroy(&source->audio_mutex);
pthread_mutex_destroy(&source->video_mutex);
obs_context_data_free(&source->context);
bfree(source);
}
static inline struct source_frame *get_closest_frame(obs_source_t source,
uint64_t sys_time, int *audio_time_refs)
{
struct source_frame *next_frame = source->video_frames.array[0];
struct source_frame *frame = NULL;
uint64_t sys_offset = sys_time - source->last_sys_timestamp;
uint64_t frame_time = next_frame->timestamp;
uint64_t frame_offset = 0;
/* account for timestamp invalidation */
if (frame_out_of_bounds(source, frame_time)) {
source->last_frame_ts = next_frame->timestamp;
(*audio_time_refs)++;
} else {
frame_offset = frame_time - source->last_frame_ts;
source->last_frame_ts += sys_offset;
}
while (frame_offset <= sys_offset) {
source_frame_destroy(frame);
frame = next_frame;
da_erase(source->video_frames, 0);
if (!source->video_frames.num)
break;
next_frame = source->video_frames.array[0];
/* more timestamp checking and compensating */
if ((next_frame->timestamp - frame_time) > MAX_TIMESTAMP_JUMP) {
source->last_frame_ts =
next_frame->timestamp - frame_offset;
(*audio_time_refs)++;
}
frame_time = next_frame->timestamp;
frame_offset = frame_time - source->last_frame_ts;
}
return frame;
}
static bool new_frame_ready(obs_source_t source, uint64_t sys_time)
{
struct source_frame *next_frame = source->video_frames.array[0];
struct source_frame *frame = NULL;
uint64_t sys_offset = sys_time - source->last_sys_timestamp;
uint64_t frame_time = next_frame->timestamp;
uint64_t frame_offset = 0;
/* account for timestamp invalidation */
if (frame_out_of_bounds(source, frame_time)) {
source->last_frame_ts = next_frame->timestamp;
os_atomic_inc_long(&source->av_sync_ref);
} else {
frame_offset = frame_time - source->last_frame_ts;
source->last_frame_ts += frame_offset;
}
while (frame_offset <= sys_offset) {
source_frame_destroy(frame);
if (source->video_frames.num == 1)
return true;
frame = next_frame;
da_erase(source->video_frames, 0);
next_frame = source->video_frames.array[0];
/* more timestamp checking and compensating */
if ((next_frame->timestamp - frame_time) > MAX_TIMESTAMP_JUMP) {
source->last_frame_ts =
next_frame->timestamp - frame_offset;
os_atomic_inc_long(&source->av_sync_ref);
}
frame_time = next_frame->timestamp;
frame_offset = frame_time - source->last_frame_ts;
}
return frame != NULL;
}
static void obs_source_destroy(obs_source_t source)
{
size_t i;
obs_source_dosignal(source, "source-destroy");
if (source->filter_parent)
obs_source_filter_remove(source->filter_parent, source);
for (i = 0; i < source->filters.num; i++)
obs_source_release(source->filters.array[i]);
for (i = 0; i < source->video_frames.num; i++)
source_frame_destroy(source->video_frames.array[i]);
gs_entercontext(obs->video.graphics);
texture_destroy(source->output_texture);
gs_leavecontext();
if (source->data)
source->callbacks.destroy(source->data);
bfree(source->audio_data.data);
audio_line_destroy(source->audio_line);
audio_resampler_destroy(source->resampler);
proc_handler_destroy(source->procs);
signal_handler_destroy(source->signals);
da_free(source->video_frames);
da_free(source->filters);
pthread_mutex_destroy(&source->filter_mutex);
pthread_mutex_destroy(&source->audio_mutex);
pthread_mutex_destroy(&source->video_mutex);
obs_data_release(source->settings);
bfree(source->name);
bfree(source);
}
