generic-library/ffmpeg
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ffprobe: refactor frames decoding.

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This commit is contained in:
Nicolas George 2012-07-24 15:13:02 +02:00
parent 610c67df37
commit d74ade7d5f
1 changed files with 22 additions and 27 deletions
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47
ffprobe.c
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@ -1665,34 +1665,44 @@ static void show_frame(WriterContext *w, AVFrame *frame, AVStream *stream,
fflush(stdout);
}
static av_always_inline int get_decoded_frame(AVFormatContext *fmt_ctx,
AVFrame *frame, int *got_frame,
AVPacket *pkt)
static av_always_inline int process_frame(WriterContext *w,
AVFormatContext *fmt_ctx,
AVFrame *frame, AVPacket *pkt)
{
AVCodecContext *dec_ctx = fmt_ctx->streams[pkt->stream_index]->codec;
int ret = 0;
int ret = 0, got_frame = 0;
*got_frame = 0;
avcodec_get_frame_defaults(frame);
if (dec_ctx->codec) {
switch (dec_ctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
ret = avcodec_decode_video2(dec_ctx, frame, got_frame, pkt);
ret = avcodec_decode_video2(dec_ctx, frame, &got_frame, pkt);
break;
case AVMEDIA_TYPE_AUDIO:
ret = avcodec_decode_audio4(dec_ctx, frame, got_frame, pkt);
ret = avcodec_decode_audio4(dec_ctx, frame, &got_frame, pkt);
break;
}
}
if (ret < 0)
return ret;
ret = FFMIN(ret, pkt->size); /* guard against bogus return values */
pkt->data += ret;
pkt->size -= ret;
if (got_frame) {
nb_streams_frames[pkt->stream_index]++;
if (do_show_frames)
show_frame(w, frame, fmt_ctx->streams[pkt->stream_index], fmt_ctx);
}
return got_frame;
}
static void read_packets(WriterContext *w, AVFormatContext *fmt_ctx)
{
AVPacket pkt, pkt1;
AVFrame frame;
int i = 0, ret, got_frame;
int i = 0;
av_init_packet(&pkt);
@ -1704,17 +1714,7 @@ static void read_packets(WriterContext *w, AVFormatContext *fmt_ctx)
}
if (do_read_frames) {
pkt1 = pkt;
while (pkt1.size) {
avcodec_get_frame_defaults(&frame);
ret = get_decoded_frame(fmt_ctx, &frame, &got_frame, &pkt1);
if (ret < 0 || !got_frame)
break;
if (do_show_frames)
show_frame(w, &frame, fmt_ctx->streams[pkt.stream_index], fmt_ctx);
pkt1.data += ret;
pkt1.size -= ret;
nb_streams_frames[pkt.stream_index]++;
}
while (pkt1.size && process_frame(w, fmt_ctx, &frame, &pkt1) > 0);
}
av_free_packet(&pkt);
}
@ -1724,13 +1724,8 @@ static void read_packets(WriterContext *w, AVFormatContext *fmt_ctx)
//Flush remaining frames that are cached in the decoder
for (i = 0; i < fmt_ctx->nb_streams; i++) {
pkt.stream_index = i;
while (get_decoded_frame(fmt_ctx, &frame, &got_frame, &pkt) >= 0 && got_frame) {
if (do_read_frames) {
if (do_show_frames)
show_frame(w, &frame, fmt_ctx->streams[pkt.stream_index], fmt_ctx);
nb_streams_frames[pkt.stream_index]++;
}
}
if (do_read_frames)
while (process_frame(w, fmt_ctx, &frame, &pkt) > 0);
}
}