@@ -117,7 +117,7 @@ typedef struct BenchmarkTimeStamps {
static BenchmarkTimeStamps get_benchmark_time_stamps(void);
static int64_t getmaxrss(void);
-unsigned nb_output_dumped = 0;
+atomic_uint nb_output_dumped = 0;
static BenchmarkTimeStamps current_time;
AVIOContext *progress_avio = NULL;
@@ -496,7 +496,7 @@ static void print_report(int is_last_report, int64_t timer_start, int64_t cur_ti
last_time = cur_time;
}
if (((cur_time - last_time) < stats_period && !first_report) ||
- (first_report && nb_output_dumped < nb_output_files))
+ (first_report && atomic_load(&nb_output_dumped) < nb_output_files))
return;
last_time = cur_time;
}
@@ -750,28 +750,12 @@ int subtitle_wrap_frame(AVFrame *frame, AVSubtitle *subtitle, int copy)
static int process_input_packet(InputStream *ist, const AVPacket *pkt, int no_eof)
{
InputFile *f = input_files[ist->file_index];
- int64_t dts_est = AV_NOPTS_VALUE;
int ret = 0;
int eof_reached = 0;
if (ret == AVERROR_EOF || (!pkt && !ist->decoding_needed))
eof_reached = 1;
- if (pkt && pkt->opaque_ref) {
- DemuxPktData *pd = (DemuxPktData*)pkt->opaque_ref->data;
- dts_est = pd->dts_est;
- }
-
- for (int oidx = 0; oidx < ist->nb_outputs; oidx++) {
- OutputStream *ost = ist->outputs[oidx];
- if (ost->enc || (!pkt && no_eof))
- continue;
-
- ret = of_streamcopy(ost, pkt, dts_est);
- if (ret < 0)
- return ret;
- }
-
return !eof_reached;
}
@@ -995,16 +979,6 @@ static int process_input(int file_index, AVPacket *pkt)
else if (ret < 0)
return ret;
}
-
- /* mark all outputs that don't go through lavfi as finished */
- for (int oidx = 0; oidx < ist->nb_outputs; oidx++) {
- OutputStream *ost = ist->outputs[oidx];
- OutputFile *of = output_files[ost->file_index];
-
- ret = of_output_packet(of, ost, NULL);
- if (ret < 0)
- return ret;
- }
}
ifile->eof_reached = 1;
@@ -594,7 +594,6 @@ typedef struct OutputStream {
/* packet quality factor */
atomic_int quality;
- int sq_idx_encode;
int sq_idx_mux;
EncStats enc_stats_pre;
@@ -646,7 +645,6 @@ extern FilterGraph **filtergraphs;
extern int nb_filtergraphs;
extern char *vstats_filename;
-extern char *sdp_filename;
extern float dts_delta_threshold;
extern float dts_error_threshold;
@@ -679,7 +677,7 @@ extern const AVIOInterruptCB int_cb;
extern const OptionDef options[];
extern HWDevice *filter_hw_device;
-extern unsigned nb_output_dumped;
+extern atomic_uint nb_output_dumped;
extern int ignore_unknown_streams;
extern int copy_unknown_streams;
@@ -791,13 +789,6 @@ void of_free(OutputFile **pof);
void of_enc_stats_close(void);
-int of_output_packet(OutputFile *of, OutputStream *ost, AVPacket *pkt);
-
-/**
- * @param dts predicted packet dts in AV_TIME_BASE_Q
- */
-int of_streamcopy(OutputStream *ost, const AVPacket *pkt, int64_t dts);
-
int64_t of_filesize(OutputFile *of);
int ifile_open(const OptionsContext *o, const char *filename, Scheduler *sch);
@@ -23,16 +23,13 @@
#include "ffmpeg.h"
#include "ffmpeg_mux.h"
#include "ffmpeg_utils.h"
-#include "objpool.h"
#include "sync_queue.h"
-#include "thread_queue.h"
#include "libavutil/fifo.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/timestamp.h"
-#include "libavutil/thread.h"
#include "libavcodec/packet.h"
@@ -43,8 +40,6 @@ typedef struct MuxThreadContext {
AVPacket *pkt;
} MuxThreadContext;
-int want_sdp = 1;
-
static Muxer *mux_from_of(OutputFile *of)
{
return (Muxer*)of;
@@ -207,6 +202,8 @@ static int sync_queue_process(Muxer *mux, OutputStream *ost, AVPacket *pkt, int
return 0;
}
+static int of_streamcopy(OutputStream *ost, AVPacket *pkt);
+
/* apply the output bitstream filters */
static int mux_packet_filter(Muxer *mux, OutputStream *ost,
AVPacket *pkt, int *stream_eof)
@@ -215,6 +212,18 @@ static int mux_packet_filter(Muxer *mux, OutputStream *ost,
const char *err_msg;
int ret = 0;
+ if (pkt && !ost->enc) {
+ ret = of_streamcopy(ost, pkt);
+ if (ret == AVERROR(EAGAIN))
+ return 0;
+ else if (ret == AVERROR_EOF) {
+ av_packet_unref(pkt);
+ pkt = NULL;
+ ret = 0;
+ } else if (ret < 0)
+ goto fail;
+ }
+
if (ms->bsf_ctx) {
int bsf_eof = 0;
@@ -316,19 +325,22 @@ void *muxer_thread(void *arg)
OutputStream *ost;
int stream_idx, stream_eof = 0;
- ret = tq_receive(mux->tq, &stream_idx, mt.pkt);
+ ret = sch_mux_receive(mux->sch, of->index, mt.pkt);
+ stream_idx = mt.pkt->stream_index;
if (stream_idx < 0) {
av_log(mux, AV_LOG_VERBOSE, "All streams finished\n");
ret = 0;
break;
}
- ost = of->streams[stream_idx];
+ ost = of->streams[mux->sch_stream_idx[stream_idx]];
+ mt.pkt->stream_index = ost->index;
+
ret = mux_packet_filter(mux, ost, ret < 0 ? NULL : mt.pkt, &stream_eof);
av_packet_unref(mt.pkt);
if (ret == AVERROR_EOF) {
if (stream_eof) {
- tq_receive_finish(mux->tq, stream_idx);
+ sch_mux_receive_finish(mux->sch, of->index, stream_idx);
} else {
av_log(mux, AV_LOG_VERBOSE, "Muxer returned EOF\n");
ret = 0;
@@ -343,233 +355,54 @@ void *muxer_thread(void *arg)
finish:
mux_thread_uninit(&mt);
- for (unsigned int i = 0; i < mux->fc->nb_streams; i++)
- tq_receive_finish(mux->tq, i);
-
- av_log(mux, AV_LOG_VERBOSE, "Terminating muxer thread\n");
-
return (void*)(intptr_t)ret;
}
-static int thread_submit_packet(Muxer *mux, OutputStream *ost, AVPacket *pkt)
-{
- int ret = 0;
-
- if (!pkt || ost->finished & MUXER_FINISHED)
- goto finish;
-
- ret = tq_send(mux->tq, ost->index, pkt);
- if (ret < 0)
- goto finish;
-
- return 0;
-
-finish:
- if (pkt)
- av_packet_unref(pkt);
-
- ost->finished |= MUXER_FINISHED;
- tq_send_finish(mux->tq, ost->index);
- return ret == AVERROR_EOF ? 0 : ret;
-}
-
-static int queue_packet(OutputStream *ost, AVPacket *pkt)
-{
- MuxStream *ms = ms_from_ost(ost);
- AVPacket *tmp_pkt = NULL;
- int ret;
-
- if (!av_fifo_can_write(ms->muxing_queue)) {
- size_t cur_size = av_fifo_can_read(ms->muxing_queue);
- size_t pkt_size = pkt ? pkt->size : 0;
- unsigned int are_we_over_size =
- (ms->muxing_queue_data_size + pkt_size) > ms->muxing_queue_data_threshold;
- size_t limit = are_we_over_size ? ms->max_muxing_queue_size : SIZE_MAX;
- size_t new_size = FFMIN(2 * cur_size, limit);
-
- if (new_size <= cur_size) {
- av_log(ost, AV_LOG_ERROR,
- "Too many packets buffered for output stream %d:%d.\n",
- ost->file_index, ost->st->index);
- return AVERROR(ENOSPC);
- }
- ret = av_fifo_grow2(ms->muxing_queue, new_size - cur_size);
- if (ret < 0)
- return ret;
- }
-
- if (pkt) {
- ret = av_packet_make_refcounted(pkt);
- if (ret < 0)
- return ret;
-
- tmp_pkt = av_packet_alloc();
- if (!tmp_pkt)
- return AVERROR(ENOMEM);
-
- av_packet_move_ref(tmp_pkt, pkt);
- ms->muxing_queue_data_size += tmp_pkt->size;
- }
- av_fifo_write(ms->muxing_queue, &tmp_pkt, 1);
-
- return 0;
-}
-
-static int submit_packet(Muxer *mux, AVPacket *pkt, OutputStream *ost)
-{
- int ret;
-
- if (mux->tq) {
- return thread_submit_packet(mux, ost, pkt);
- } else {
- /* the muxer is not initialized yet, buffer the packet */
- ret = queue_packet(ost, pkt);
- if (ret < 0) {
- if (pkt)
- av_packet_unref(pkt);
- return ret;
- }
- }
-
- return 0;
-}
-
-int of_output_packet(OutputFile *of, OutputStream *ost, AVPacket *pkt)
-{
- Muxer *mux = mux_from_of(of);
- int ret = 0;
-
- if (pkt && pkt->dts != AV_NOPTS_VALUE)
- ost->last_mux_dts = av_rescale_q(pkt->dts, pkt->time_base, AV_TIME_BASE_Q);
-
- ret = submit_packet(mux, pkt, ost);
- if (ret < 0) {
- av_log(ost, AV_LOG_ERROR, "Error submitting a packet to the muxer: %s",
- av_err2str(ret));
- return ret;
- }
-
- return 0;
-}
-
-int of_streamcopy(OutputStream *ost, const AVPacket *pkt, int64_t dts)
+static int of_streamcopy(OutputStream *ost, AVPacket *pkt)
{
OutputFile *of = output_files[ost->file_index];
MuxStream *ms = ms_from_ost(ost);
+ DemuxPktData *pd = pkt->opaque_ref ? (DemuxPktData*)pkt->opaque_ref->data : NULL;
+ int64_t dts = pd ? pd->dts_est : AV_NOPTS_VALUE;
int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
int64_t ts_offset;
- AVPacket *opkt = ms->pkt;
- int ret;
-
- av_packet_unref(opkt);
if (of->recording_time != INT64_MAX &&
dts >= of->recording_time + start_time)
- pkt = NULL;
-
- // EOF: flush output bitstream filters.
- if (!pkt)
- return of_output_packet(of, ost, NULL);
+ return AVERROR_EOF;
if (!ms->streamcopy_started && !(pkt->flags & AV_PKT_FLAG_KEY) &&
!ms->copy_initial_nonkeyframes)
- return 0;
+ return AVERROR(EAGAIN);
if (!ms->streamcopy_started) {
if (!ms->copy_prior_start &&
(pkt->pts == AV_NOPTS_VALUE ?
dts < ms->ts_copy_start :
pkt->pts < av_rescale_q(ms->ts_copy_start, AV_TIME_BASE_Q, pkt->time_base)))
- return 0;
+ return AVERROR(EAGAIN);
if (of->start_time != AV_NOPTS_VALUE && dts < of->start_time)
- return 0;
+ return AVERROR(EAGAIN);
}
- ret = av_packet_ref(opkt, pkt);
- if (ret < 0)
- return ret;
-
- ts_offset = av_rescale_q(start_time, AV_TIME_BASE_Q, opkt->time_base);
+ ts_offset = av_rescale_q(start_time, AV_TIME_BASE_Q, pkt->time_base);
if (pkt->pts != AV_NOPTS_VALUE)
- opkt->pts -= ts_offset;
+ pkt->pts -= ts_offset;
if (pkt->dts == AV_NOPTS_VALUE) {
- opkt->dts = av_rescale_q(dts, AV_TIME_BASE_Q, opkt->time_base);
+ pkt->dts = av_rescale_q(dts, AV_TIME_BASE_Q, pkt->time_base);
} else if (ost->st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
- opkt->pts = opkt->dts - ts_offset;
+ pkt->pts = pkt->dts - ts_offset;
}
- opkt->dts -= ts_offset;
-
- ret = of_output_packet(of, ost, opkt);
- if (ret < 0)
- return ret;
+ pkt->dts -= ts_offset;
ms->streamcopy_started = 1;
return 0;
}
-static int thread_stop(Muxer *mux)
-{
- void *ret;
-
- if (!mux || !mux->tq)
- return 0;
-
- for (unsigned int i = 0; i < mux->fc->nb_streams; i++)
- tq_send_finish(mux->tq, i);
-
- pthread_join(mux->thread, &ret);
-
- tq_free(&mux->tq);
-
- return (int)(intptr_t)ret;
-}
-
-static int thread_start(Muxer *mux)
-{
- AVFormatContext *fc = mux->fc;
- ObjPool *op;
- int ret;
-
- op = objpool_alloc_packets();
- if (!op)
- return AVERROR(ENOMEM);
-
- mux->tq = tq_alloc(fc->nb_streams, mux->thread_queue_size, op, pkt_move);
- if (!mux->tq) {
- objpool_free(&op);
- return AVERROR(ENOMEM);
- }
-
- ret = pthread_create(&mux->thread, NULL, muxer_thread, (void*)mux);
- if (ret) {
- tq_free(&mux->tq);
- return AVERROR(ret);
- }
-
- /* flush the muxing queues */
- for (int i = 0; i < fc->nb_streams; i++) {
- OutputStream *ost = mux->of.streams[i];
- MuxStream *ms = ms_from_ost(ost);
- AVPacket *pkt;
-
- while (av_fifo_read(ms->muxing_queue, &pkt, 1) >= 0) {
- ret = thread_submit_packet(mux, ost, pkt);
- if (pkt) {
- ms->muxing_queue_data_size -= pkt->size;
- av_packet_free(&pkt);
- }
- if (ret < 0)
- return ret;
- }
- }
-
- return 0;
-}
-
int print_sdp(const char *filename);
int print_sdp(const char *filename)
@@ -580,11 +413,6 @@ int print_sdp(const char *filename)
AVIOContext *sdp_pb;
AVFormatContext **avc;
- for (i = 0; i < nb_output_files; i++) {
- if (!mux_from_of(output_files[i])->header_written)
- return 0;
- }
-
avc = av_malloc_array(nb_output_files, sizeof(*avc));
if (!avc)
return AVERROR(ENOMEM);
@@ -619,25 +447,17 @@ int print_sdp(const char *filename)
avio_closep(&sdp_pb);
}
- // SDP successfully written, allow muxer threads to start
- ret = 1;
-
fail:
av_freep(&avc);
return ret;
}
-int mux_check_init(Muxer *mux)
+int mux_check_init(void *arg)
{
+ Muxer *mux = arg;
OutputFile *of = &mux->of;
AVFormatContext *fc = mux->fc;
- int ret, i;
-
- for (i = 0; i < fc->nb_streams; i++) {
- OutputStream *ost = of->streams[i];
- if (!ost->initialized)
- return 0;
- }
+ int ret;
ret = avformat_write_header(fc, &mux->opts);
if (ret < 0) {
@@ -649,27 +469,7 @@ int mux_check_init(Muxer *mux)
mux->header_written = 1;
av_dump_format(fc, of->index, fc->url, 1);
- nb_output_dumped++;
-
- if (sdp_filename || want_sdp) {
- ret = print_sdp(sdp_filename);
- if (ret < 0) {
- av_log(NULL, AV_LOG_ERROR, "Error writing the SDP.\n");
- return ret;
- } else if (ret == 1) {
- /* SDP is written only after all the muxers are ready, so now we
- * start ALL the threads */
- for (i = 0; i < nb_output_files; i++) {
- ret = thread_start(mux_from_of(output_files[i]));
- if (ret < 0)
- return ret;
- }
- }
- } else {
- ret = thread_start(mux_from_of(of));
- if (ret < 0)
- return ret;
- }
+ atomic_fetch_add(&nb_output_dumped, 1);
return 0;
}
@@ -726,9 +526,10 @@ int of_stream_init(OutputFile *of, OutputStream *ost)
ost->st->time_base);
}
- ost->initialized = 1;
+ if (ms->sch_idx >= 0)
+ return sch_mux_stream_ready(mux->sch, of->index, ms->sch_idx);
- return mux_check_init(mux);
+ return 0;
}
static int check_written(OutputFile *of)
@@ -842,15 +643,13 @@ int of_write_trailer(OutputFile *of)
AVFormatContext *fc = mux->fc;
int ret, mux_result = 0;
- if (!mux->tq) {
+ if (!mux->header_written) {
av_log(mux, AV_LOG_ERROR,
"Nothing was written into output file, because "
"at least one of its streams received no packets.\n");
return AVERROR(EINVAL);
}
- mux_result = thread_stop(mux);
-
ret = av_write_trailer(fc);
if (ret < 0) {
av_log(mux, AV_LOG_ERROR, "Error writing trailer: %s\n", av_err2str(ret));
@@ -895,13 +694,6 @@ static void ost_free(OutputStream **post)
ost->logfile = NULL;
}
- if (ms->muxing_queue) {
- AVPacket *pkt;
- while (av_fifo_read(ms->muxing_queue, &pkt, 1) >= 0)
- av_packet_free(&pkt);
- av_fifo_freep2(&ms->muxing_queue);
- }
-
avcodec_parameters_free(&ost->par_in);
av_bsf_free(&ms->bsf_ctx);
@@ -966,8 +758,6 @@ void of_free(OutputFile **pof)
return;
mux = mux_from_of(of);
- thread_stop(mux);
-
sq_free(&of->sq_encode);
sq_free(&mux->sq_mux);
@@ -25,7 +25,6 @@
#include <stdint.h>
#include "ffmpeg_sched.h"
-#include "thread_queue.h"
#include "libavformat/avformat.h"
@@ -33,7 +32,6 @@
#include "libavutil/dict.h"
#include "libavutil/fifo.h"
-#include "libavutil/thread.h"
typedef struct MuxStream {
OutputStream ost;
@@ -41,9 +39,6 @@ typedef struct MuxStream {
// name used for logging
char log_name[32];
- /* the packets are buffered here until the muxer is ready to be initialized */
- AVFifo *muxing_queue;
-
AVBSFContext *bsf_ctx;
AVPacket *bsf_pkt;
@@ -56,17 +51,6 @@ typedef struct MuxStream {
int64_t max_frames;
- /*
- * The size of the AVPackets' buffers in queue.
- * Updated when a packet is either pushed or pulled from the queue.
- */
- size_t muxing_queue_data_size;
-
- int max_muxing_queue_size;
-
- /* Threshold after which max_muxing_queue_size will be in effect */
- size_t muxing_queue_data_threshold;
-
// timestamp from which the streamcopied streams should start,
// in AV_TIME_BASE_Q;
// everything before it should be discarded
@@ -105,9 +89,6 @@ typedef struct Muxer {
int *sch_stream_idx;
int nb_sch_stream_idx;
- pthread_t thread;
- ThreadQueue *tq;
-
AVDictionary *opts;
int thread_queue_size;
@@ -121,10 +102,7 @@ typedef struct Muxer {
AVPacket *sq_pkt;
} Muxer;
-/* whether we want to print an SDP, set in of_open() */
-extern int want_sdp;
-
-int mux_check_init(Muxer *mux);
+int mux_check_init(void *arg);
static MuxStream *ms_from_ost(OutputStream *ost)
{
@@ -923,13 +923,6 @@ static int new_stream_audio(Muxer *mux, const OptionsContext *o,
return 0;
}
-static int new_stream_attachment(Muxer *mux, const OptionsContext *o,
- OutputStream *ost)
-{
- ost->finished = 1;
- return 0;
-}
-
static int new_stream_subtitle(Muxer *mux, const OptionsContext *o,
OutputStream *ost)
{
@@ -1167,9 +1160,6 @@ static int ost_add(Muxer *mux, const OptionsContext *o, enum AVMediaType type,
if (!ost->par_in)
return AVERROR(ENOMEM);
- ms->muxing_queue = av_fifo_alloc2(8, sizeof(AVPacket*), 0);
- if (!ms->muxing_queue)
- return AVERROR(ENOMEM);
ms->last_mux_dts = AV_NOPTS_VALUE;
ost->st = st;
@@ -1437,7 +1427,6 @@ static int ost_add(Muxer *mux, const OptionsContext *o, enum AVMediaType type,
case AVMEDIA_TYPE_VIDEO: ret = new_stream_video (mux, o, ost); break;
case AVMEDIA_TYPE_AUDIO: ret = new_stream_audio (mux, o, ost); break;
case AVMEDIA_TYPE_SUBTITLE: ret = new_stream_subtitle (mux, o, ost); break;
- case AVMEDIA_TYPE_ATTACHMENT: ret = new_stream_attachment(mux, o, ost); break;
}
if (ret < 0)
return ret;
@@ -1911,7 +1900,6 @@ static int setup_sync_queues(Muxer *mux, AVFormatContext *oc, int64_t buf_size_u
MuxStream *ms = ms_from_ost(ost);
enum AVMediaType type = ost->type;
- ost->sq_idx_encode = -1;
ost->sq_idx_mux = -1;
nb_interleaved += IS_INTERLEAVED(type);
@@ -1934,11 +1922,17 @@ static int setup_sync_queues(Muxer *mux, AVFormatContext *oc, int64_t buf_size_u
* - at least one encoded audio/video stream is frame-limited, since
* that has similar semantics to 'shortest'
* - at least one audio encoder requires constant frame sizes
+ *
+ * Note that encoding sync queues are handled in the scheduler, because
+ * different encoders run in different threads and need external
+ * synchronization, while muxer sync queues can be handled inside the muxer
*/
if ((of->shortest && nb_av_enc > 1) || limit_frames_av_enc || nb_audio_fs) {
- of->sq_encode = sq_alloc(SYNC_QUEUE_FRAMES, buf_size_us, mux);
- if (!of->sq_encode)
- return AVERROR(ENOMEM);
+ int sq_idx, ret;
+
+ sq_idx = sch_add_sq_enc(mux->sch, buf_size_us, mux);
+ if (sq_idx < 0)
+ return sq_idx;
for (int i = 0; i < oc->nb_streams; i++) {
OutputStream *ost = of->streams[i];
@@ -1948,13 +1942,11 @@ static int setup_sync_queues(Muxer *mux, AVFormatContext *oc, int64_t buf_size_u
if (!IS_AV_ENC(ost, type))
continue;
- ost->sq_idx_encode = sq_add_stream(of->sq_encode,
- of->shortest || ms->max_frames < INT64_MAX);
- if (ost->sq_idx_encode < 0)
- return ost->sq_idx_encode;
-
- if (ms->max_frames != INT64_MAX)
- sq_limit_frames(of->sq_encode, ost->sq_idx_encode, ms->max_frames);
+ ret = sch_sq_add_enc(mux->sch, sq_idx, ms->sch_idx_enc,
+ of->shortest || ms->max_frames < INT64_MAX,
+ ms->max_frames);
+ if (ret < 0)
+ return ret;
}
}
@@ -2707,8 +2699,6 @@ int of_open(const OptionsContext *o, const char *filename, Scheduler *sch)
av_strlcat(mux->log_name, "/", sizeof(mux->log_name));
av_strlcat(mux->log_name, oc->oformat->name, sizeof(mux->log_name));
- if (strcmp(oc->oformat->name, "rtp"))
- want_sdp = 0;
of->format = oc->oformat;
if (recording_time != INT64_MAX)
@@ -2724,7 +2714,7 @@ int of_open(const OptionsContext *o, const char *filename, Scheduler *sch)
AVFMT_FLAG_BITEXACT);
}
- err = sch_add_mux(sch, muxer_thread, NULL, mux,
+ err = sch_add_mux(sch, muxer_thread, mux_check_init, mux,
!strcmp(oc->oformat->name, "rtp"));
if (err < 0)
return err;
@@ -64,7 +64,6 @@ const char *const opt_name_top_field_first[] = {"top", NULL};
HWDevice *filter_hw_device;
char *vstats_filename;
-char *sdp_filename;
float audio_drift_threshold = 0.1;
float dts_delta_threshold = 10;
@@ -580,9 +579,8 @@ fail:
static int opt_sdp_file(void *optctx, const char *opt, const char *arg)
{
- av_free(sdp_filename);
- sdp_filename = av_strdup(arg);
- return 0;
+ Scheduler *sch = optctx;
+ return sch_sdp_filename(sch, arg);
}
#if CONFIG_VAAPI