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lavfi/src_movie: switch to new decoding API

tags/n4.4
Anton Khirnov 5 years ago
parent
ce0f5397a8
commit
8918a3dfa2
1 changed files with 81 additions and 90 deletions
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  1. +81
    -90
      libavfilter/src_movie.c

+ 81
- 90
libavfilter/src_movie.c View File

@@ -51,7 +51,6 @@
typedef struct MovieStream {
AVStream *st;
AVCodecContext *codec_ctx;
int done;
int64_t discontinuity_threshold;
int64_t last_pts;
} MovieStream;
@@ -70,8 +69,6 @@ typedef struct MovieContext {
int64_t ts_offset;

AVFormatContext *format_ctx;
int eof;
AVPacket pkt;

int max_stream_index; /**< max stream # actually used for output */
MovieStream *st; /**< array of all streams, one per output */
@@ -172,7 +169,6 @@ static int open_stream(AVFilterContext *ctx, MovieStream *st)
if (ret < 0)
return ret;

st->codec_ctx->refcounted_frames = 1;
st->codec_ctx->thread_count = ff_filter_get_nb_threads(ctx);

if ((ret = avcodec_open2(st->codec_ctx, codec, NULL)) < 0) {
@@ -344,7 +340,6 @@ static av_cold void movie_uninit(AVFilterContext *ctx)
}
av_freep(&movie->st);
av_freep(&movie->out_index);
av_packet_unref(&movie->pkt);
if (movie->format_ctx)
avformat_close_input(&movie->format_ctx);
}
@@ -451,103 +446,69 @@ static int rewind_file(AVFilterContext *ctx)

for (i = 0; i < ctx->nb_outputs; i++) {
avcodec_flush_buffers(movie->st[i].codec_ctx);
movie->st[i].done = 0;
}
movie->eof = 0;
return 0;
}

static int movie_decode_packet(AVFilterContext *ctx)
{
MovieContext *movie = ctx->priv;
AVPacket pkt = { 0 };
int pkt_out_id, ret;

/* read a new packet from input stream */
ret = av_read_frame(movie->format_ctx, &pkt);
if (ret == AVERROR_EOF) {
/* EOF -> set all decoders for flushing */
for (int i = 0; i < ctx->nb_outputs; i++) {
ret = avcodec_send_packet(movie->st[i].codec_ctx, NULL);
if (ret < 0 && ret != AVERROR_EOF)
return ret;
}

return 0;
} else if (ret < 0)
return ret;

/* send the packet to its decoder, if any */
pkt_out_id = pkt.stream_index > movie->max_stream_index ? -1 :
movie->out_index[pkt.stream_index];
if (pkt_out_id >= 0)
ret = avcodec_send_packet(movie->st[pkt_out_id].codec_ctx, &pkt);
av_packet_unref(&pkt);

return ret;
}

/**
* Try to push a frame to the requested output.
*
* @param ctx filter context
* @param out_id number of output where a frame is wanted;
* if the frame is read from file, used to set the return value;
* if the codec is being flushed, flush the corresponding stream
* @return 1 if a frame was pushed on the requested output,
* 0 if another attempt is possible,
* <0 AVERROR code
* @return 0 if a frame was pushed on the requested output,
* AVERROR(EAGAIN) if the decoder requires more input
* AVERROR(EOF) if the decoder has been completely flushed
* <0 AVERROR code
*/
static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
{
MovieContext *movie = ctx->priv;
AVPacket *pkt = &movie->pkt;
enum AVMediaType frame_type;
MovieStream *st;
int ret, got_frame = 0, pkt_out_id;
AVFilterLink *outlink;
MovieContext *movie = ctx->priv;
MovieStream *st = &movie->st[out_id];
AVFilterLink *outlink = ctx->outputs[out_id];
AVFrame *frame;

if (!pkt->size) {
if (movie->eof) {
if (movie->st[out_id].done) {
if (movie->loop_count != 1) {
ret = rewind_file(ctx);
if (ret < 0)
return ret;
movie->loop_count -= movie->loop_count > 1;
av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
return 0; /* retry */
}
return AVERROR_EOF;
}
pkt->stream_index = movie->st[out_id].st->index;
/* packet is already ready for flushing */
} else {
ret = av_read_frame(movie->format_ctx, pkt);
if (ret < 0) {
if (ret == AVERROR_EOF) {
movie->eof = 1;
return 0; /* start flushing */
}
return ret;
}
}
}

pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
movie->out_index[pkt->stream_index];
if (pkt_out_id < 0) {
av_packet_unref(pkt);
return 0;
}
st = &movie->st[pkt_out_id];
outlink = ctx->outputs[pkt_out_id];
int ret;

frame = av_frame_alloc();
if (!frame)
return AVERROR(ENOMEM);

frame_type = st->st->codecpar->codec_type;
switch (frame_type) {
case AVMEDIA_TYPE_VIDEO:
ret = avcodec_decode_video2(st->codec_ctx, frame, &got_frame, pkt);
break;
case AVMEDIA_TYPE_AUDIO:
ret = avcodec_decode_audio4(st->codec_ctx, frame, &got_frame, pkt);
break;
default:
ret = AVERROR(ENOSYS);
break;
}
ret = avcodec_receive_frame(st->codec_ctx, frame);
if (ret < 0) {
av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
av_frame_free(&frame);
av_packet_unref(pkt);
return 0;
}
if (!ret || st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
ret = pkt->size;

pkt->data += ret;
pkt->size -= ret;
if (pkt->size <= 0)
av_packet_unref(pkt);
if (!got_frame) {
if (!ret)
st->done = 1;
if (ret != AVERROR_EOF && ret != AVERROR(EAGAIN))
av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));

av_frame_free(&frame);
return 0;
return ret;
}

frame->pts = frame->best_effort_timestamp;
@@ -558,7 +519,7 @@ static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
if (st->last_pts != AV_NOPTS_VALUE) {
int64_t diff = frame->pts - st->last_pts;
if (diff < 0 || diff > st->discontinuity_threshold) {
av_log(ctx, AV_LOG_VERBOSE, "Discontinuity in stream:%d diff:%"PRId64"\n", pkt_out_id, diff);
av_log(ctx, AV_LOG_VERBOSE, "Discontinuity in stream:%d diff:%"PRId64"\n", out_id, diff);
movie->ts_offset += av_rescale_q_rnd(-diff, outlink->time_base, AV_TIME_BASE_Q, AV_ROUND_UP);
frame->pts -= diff;
}
@@ -567,7 +528,8 @@ static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
st->last_pts = frame->pts;
}
ff_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
describe_frame_to_str((char[1024]){0}, 1024, frame, frame_type, outlink));
describe_frame_to_str((char[1024]){0}, 1024, frame,
st->st->codecpar->codec_type, outlink));

if (st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
if (frame->format != outlink->format) {
@@ -583,19 +545,49 @@ static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)

if (ret < 0)
return ret;
return pkt_out_id == out_id;
return 0;
}

static int movie_request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
MovieContext *movie = ctx->priv;
unsigned out_id = FF_OUTLINK_IDX(outlink);
int ret;

while (1) {
ret = movie_push_frame(ctx, out_id);
if (ret)
return FFMIN(ret, 0);
int got_eagain = 0, got_eof = 0;
int ret = 0;

/* check all decoders for available output */
for (int i = 0; i < ctx->nb_outputs; i++) {
ret = movie_push_frame(ctx, i);
if (ret == AVERROR(EAGAIN))
got_eagain++;
else if (ret == AVERROR_EOF)
got_eof++;
else if (ret < 0)
return ret;
else if (i == out_id)
return 0;
}

if (got_eagain) {
/* all decoders require more input -> read a new packet */
ret = movie_decode_packet(ctx);
if (ret < 0)
return ret;
} else if (got_eof) {
/* all decoders flushed */
if (movie->loop_count != 1) {
ret = rewind_file(ctx);
if (ret < 0)
return ret;
movie->loop_count -= movie->loop_count > 1;
av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
continue;
}
return AVERROR_EOF;
}
}
}

@@ -619,7 +611,6 @@ static int process_command(AVFilterContext *ctx, const char *cmd, const char *ar

for (i = 0; i < ctx->nb_outputs; i++) {
avcodec_flush_buffers(movie->st[i].codec_ctx);
movie->st[i].done = 0;
}
return ret;
} else if (!strcmp(cmd, "get_duration")) {


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