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avcodec/ffv1enc: Tighter maxsize 

This allows using smaller buffers

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-10-26 01:17:03 +02:00
parent 2d81eaa37b
commit ebffb8b68e
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GPG Key ID: B18E8928B3948D64
1 changed files with 13 additions and 4 deletions
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17
libavcodec/ffv1enc.c
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@ -1143,8 +1143,7 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
uint8_t keystate = 128;
uint8_t *buf_p;
int i, ret;
int64_t maxsize = FF_INPUT_BUFFER_MIN_SIZE
+ avctx->width*avctx->height*37LL*4;
int64_t maxsize;
if(!pict) {
if (avctx->flags & AV_CODEC_FLAG_PASS1) {
@ -1192,8 +1191,18 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
return 0;
}
if (f->version > 3)
maxsize = FF_INPUT_BUFFER_MIN_SIZE + avctx->width*avctx->height*3LL*4;
maxsize = avctx->width*avctx->height * (1 + f->transparency);
if (f->chroma_planes)
maxsize += AV_CEIL_RSHIFT(avctx->width, f->chroma_h_shift) * AV_CEIL_RSHIFT(f->height, f->chroma_v_shift) * 2;
maxsize += f->slice_count * 800; //for slice header
if (f->version > 3) {
maxsize *= f->bits_per_raw_sample + 1;
} else {
maxsize += f->slice_count * 2 * (avctx->width + avctx->height); //for bug with slices that code some pixels more than once
maxsize *= 8*(2*f->bits_per_raw_sample + 5);
}
maxsize >>= 3;
maxsize += FF_INPUT_BUFFER_MIN_SIZE;
if (maxsize > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE - 32) {
av_log(avctx, AV_LOG_WARNING, "Cannot allocate worst case packet size, the encoding could fail\n");