lavfi/src_movie: switch to new decoding API
This commit is contained in:
Anton Khirnov
parent
ce0f5397a8
commit
8918a3dfa2
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@ -51,7 +51,6 @@
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typedef struct MovieStream {
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AVStream *st;
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AVCodecContext *codec_ctx;
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int done;
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int64_t discontinuity_threshold;
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int64_t last_pts;
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} MovieStream;
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@ -70,8 +69,6 @@ typedef struct MovieContext {
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int64_t ts_offset;
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AVFormatContext *format_ctx;
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int eof;
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AVPacket pkt;
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int max_stream_index; /**< max stream # actually used for output */
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MovieStream *st; /**< array of all streams, one per output */
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@ -172,7 +169,6 @@ static int open_stream(AVFilterContext *ctx, MovieStream *st)
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if (ret < 0)
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return ret;
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st->codec_ctx->refcounted_frames = 1;
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st->codec_ctx->thread_count = ff_filter_get_nb_threads(ctx);
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if ((ret = avcodec_open2(st->codec_ctx, codec, NULL)) < 0) {
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@ -344,7 +340,6 @@ static av_cold void movie_uninit(AVFilterContext *ctx)
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}
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av_freep(&movie->st);
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av_freep(&movie->out_index);
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av_packet_unref(&movie->pkt);
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if (movie->format_ctx)
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avformat_close_input(&movie->format_ctx);
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}
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@ -451,103 +446,69 @@ static int rewind_file(AVFilterContext *ctx)
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for (i = 0; i < ctx->nb_outputs; i++) {
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avcodec_flush_buffers(movie->st[i].codec_ctx);
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movie->st[i].done = 0;
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}
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movie->eof = 0;
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return 0;
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}
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static int movie_decode_packet(AVFilterContext *ctx)
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{
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MovieContext *movie = ctx->priv;
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AVPacket pkt = { 0 };
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int pkt_out_id, ret;
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/* read a new packet from input stream */
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ret = av_read_frame(movie->format_ctx, &pkt);
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if (ret == AVERROR_EOF) {
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/* EOF -> set all decoders for flushing */
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for (int i = 0; i < ctx->nb_outputs; i++) {
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ret = avcodec_send_packet(movie->st[i].codec_ctx, NULL);
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if (ret < 0 && ret != AVERROR_EOF)
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return ret;
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}
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return 0;
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} else if (ret < 0)
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return ret;
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/* send the packet to its decoder, if any */
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pkt_out_id = pkt.stream_index > movie->max_stream_index ? -1 :
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movie->out_index[pkt.stream_index];
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if (pkt_out_id >= 0)
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ret = avcodec_send_packet(movie->st[pkt_out_id].codec_ctx, &pkt);
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av_packet_unref(&pkt);
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return ret;
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}
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/**
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* Try to push a frame to the requested output.
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*
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* @param ctx filter context
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* @param out_id number of output where a frame is wanted;
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* if the frame is read from file, used to set the return value;
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* if the codec is being flushed, flush the corresponding stream
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* @return 1 if a frame was pushed on the requested output,
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* 0 if another attempt is possible,
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* <0 AVERROR code
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* @return 0 if a frame was pushed on the requested output,
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* AVERROR(EAGAIN) if the decoder requires more input
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* AVERROR(EOF) if the decoder has been completely flushed
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* <0 AVERROR code
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*/
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static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
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{
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MovieContext *movie = ctx->priv;
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AVPacket *pkt = &movie->pkt;
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enum AVMediaType frame_type;
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MovieStream *st;
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int ret, got_frame = 0, pkt_out_id;
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AVFilterLink *outlink;
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MovieContext *movie = ctx->priv;
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MovieStream *st = &movie->st[out_id];
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AVFilterLink *outlink = ctx->outputs[out_id];
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AVFrame *frame;
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if (!pkt->size) {
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if (movie->eof) {
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if (movie->st[out_id].done) {
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if (movie->loop_count != 1) {
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ret = rewind_file(ctx);
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if (ret < 0)
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return ret;
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movie->loop_count -= movie->loop_count > 1;
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av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
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return 0; /* retry */
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}
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return AVERROR_EOF;
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}
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pkt->stream_index = movie->st[out_id].st->index;
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/* packet is already ready for flushing */
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} else {
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ret = av_read_frame(movie->format_ctx, pkt);
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if (ret < 0) {
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if (ret == AVERROR_EOF) {
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movie->eof = 1;
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return 0; /* start flushing */
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}
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return ret;
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}
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}
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}
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pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
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movie->out_index[pkt->stream_index];
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if (pkt_out_id < 0) {
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av_packet_unref(pkt);
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return 0;
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}
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st = &movie->st[pkt_out_id];
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outlink = ctx->outputs[pkt_out_id];
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int ret;
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frame = av_frame_alloc();
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if (!frame)
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return AVERROR(ENOMEM);
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frame_type = st->st->codecpar->codec_type;
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switch (frame_type) {
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case AVMEDIA_TYPE_VIDEO:
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ret = avcodec_decode_video2(st->codec_ctx, frame, &got_frame, pkt);
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break;
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case AVMEDIA_TYPE_AUDIO:
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ret = avcodec_decode_audio4(st->codec_ctx, frame, &got_frame, pkt);
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break;
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default:
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ret = AVERROR(ENOSYS);
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break;
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}
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ret = avcodec_receive_frame(st->codec_ctx, frame);
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if (ret < 0) {
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av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
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av_frame_free(&frame);
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av_packet_unref(pkt);
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return 0;
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}
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if (!ret || st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
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ret = pkt->size;
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if (ret != AVERROR_EOF && ret != AVERROR(EAGAIN))
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av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
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pkt->data += ret;
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pkt->size -= ret;
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if (pkt->size <= 0)
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av_packet_unref(pkt);
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if (!got_frame) {
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if (!ret)
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st->done = 1;
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av_frame_free(&frame);
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return 0;
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return ret;
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}
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frame->pts = frame->best_effort_timestamp;
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@ -558,7 +519,7 @@ static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
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if (st->last_pts != AV_NOPTS_VALUE) {
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int64_t diff = frame->pts - st->last_pts;
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if (diff < 0 || diff > st->discontinuity_threshold) {
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av_log(ctx, AV_LOG_VERBOSE, "Discontinuity in stream:%d diff:%"PRId64"\n", pkt_out_id, diff);
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av_log(ctx, AV_LOG_VERBOSE, "Discontinuity in stream:%d diff:%"PRId64"\n", out_id, diff);
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movie->ts_offset += av_rescale_q_rnd(-diff, outlink->time_base, AV_TIME_BASE_Q, AV_ROUND_UP);
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frame->pts -= diff;
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}
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@ -567,7 +528,8 @@ static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
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st->last_pts = frame->pts;
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}
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ff_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
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describe_frame_to_str((char[1024]){0}, 1024, frame, frame_type, outlink));
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describe_frame_to_str((char[1024]){0}, 1024, frame,
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st->st->codecpar->codec_type, outlink));
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if (st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
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if (frame->format != outlink->format) {
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@ -583,19 +545,49 @@ static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
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if (ret < 0)
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return ret;
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return pkt_out_id == out_id;
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return 0;
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}
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static int movie_request_frame(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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MovieContext *movie = ctx->priv;
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unsigned out_id = FF_OUTLINK_IDX(outlink);
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int ret;
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while (1) {
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ret = movie_push_frame(ctx, out_id);
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if (ret)
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return FFMIN(ret, 0);
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int got_eagain = 0, got_eof = 0;
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int ret = 0;
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/* check all decoders for available output */
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for (int i = 0; i < ctx->nb_outputs; i++) {
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ret = movie_push_frame(ctx, i);
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if (ret == AVERROR(EAGAIN))
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got_eagain++;
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else if (ret == AVERROR_EOF)
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got_eof++;
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else if (ret < 0)
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return ret;
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else if (i == out_id)
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return 0;
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}
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if (got_eagain) {
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/* all decoders require more input -> read a new packet */
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ret = movie_decode_packet(ctx);
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if (ret < 0)
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return ret;
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} else if (got_eof) {
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/* all decoders flushed */
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if (movie->loop_count != 1) {
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ret = rewind_file(ctx);
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if (ret < 0)
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return ret;
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movie->loop_count -= movie->loop_count > 1;
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av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
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continue;
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}
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return AVERROR_EOF;
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}
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}
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}
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@ -619,7 +611,6 @@ static int process_command(AVFilterContext *ctx, const char *cmd, const char *ar
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for (i = 0; i < ctx->nb_outputs; i++) {
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avcodec_flush_buffers(movie->st[i].codec_ctx);
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movie->st[i].done = 0;
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}
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return ret;
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} else if (!strcmp(cmd, "get_duration")) {
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