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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-06-10 23:09:09 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-10 17:32:38 +0200 |
| commit | 9783749c66bf6ca2ce7a6db4c74957fe77cbe803 (patch) | |
| tree | 5bf85de8e695aec8a0fe1205fc3332d784408363 | |
| parent | c92edd969aaf8b12434ff4bd731aa4bc5548fbbf (diff) | |
| download | ffmpeg-9783749c66bf6ca2ce7a6db4c74957fe77cbe803.tar.gz | |
avcodec/fmvc: Move frame allocation to a later stage
This way more things are checked before allocation
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/fmvc.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/libavcodec/fmvc.c b/libavcodec/fmvc.c index 863c65c351..3ee915cc4c 100644 --- a/libavcodec/fmvc.c +++ b/libavcodec/fmvc.c @@ -400,20 +400,17 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *frame, GetByteContext *gb = &s->gb; PutByteContext *pb = &s->pb; int ret, y, x; + int key_frame; if (avpkt->size < 8) return AVERROR_INVALIDDATA; - if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) - return ret; - bytestream2_init(gb, avpkt->data, avpkt->size); bytestream2_skip(gb, 2); - frame->key_frame = !!bytestream2_get_le16(gb); - frame->pict_type = frame->key_frame ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P; + key_frame = !!bytestream2_get_le16(gb); - if (frame->key_frame) { + if (key_frame) { const uint8_t *src; unsigned type, size; uint8_t *dst; @@ -433,6 +430,12 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *frame, return AVERROR_PATCHWELCOME; } + if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) + return ret; + + frame->key_frame = 1; + frame->pict_type = AV_PICTURE_TYPE_I; + src = s->buffer; dst = frame->data[0] + (avctx->height - 1) * frame->linesize[0]; for (y = 0; y < avctx->height; y++) { @@ -513,6 +516,12 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *frame, dst = &rect[block_h * s->stride]; } + if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) + return ret; + + frame->key_frame = 0; + frame->pict_type = AV_PICTURE_TYPE_P; + ssrc = s->buffer; ddst = frame->data[0] + (avctx->height - 1) * frame->linesize[0]; for (y = 0; y < avctx->height; y++) { |