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Simplify AVUI decoding, one skip value is enough.

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This commit is contained in:
Carl Eugen Hoyos 2012-05-19 19:27:14 +02:00
parent 2596d7261d
commit d9b2410f75
1 changed files with 11 additions and 11 deletions
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22
libavcodec/avuidec.c
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@ -43,7 +43,7 @@ static int avui_decode_frame(AVCodecContext *avctx, void *data,
const uint8_t *src = avpkt->data;
const uint8_t *srca;
uint8_t *y, *u, *v, *a;
int transparent, interlaced = 1, skip[2], i, j, k;
int transparent, interlaced = 1, skip, i, j, k;
if (pic->data[0])
avctx->release_buffer(avctx, pic);
@ -51,20 +51,20 @@ static int avui_decode_frame(AVCodecContext *avctx, void *data,
if (!memcmp(&avctx->extradata[4], "APRGAPRG0001", 12) &&
avctx->extradata_size >= 24)
interlaced = avctx->extradata[19] != 1;
skip[0] = skip[1] = 16;
if (avctx->height == 486) {
skip[0] = 10;
skip[1] = 10;
skip = 10;
} else {
skip = 16;
}
if (avpkt->size < avctx->width * (2 * avctx->height + skip[0] + skip[1])
if (avpkt->size < 2 * avctx->width * (avctx->height + skip)
+ 4 * interlaced) {
av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
return AVERROR(EINVAL);
}
transparent = avctx->bits_per_coded_sample == 32 &&
avpkt->size >= (2 * avctx->height + skip[0] + skip[1]) *
avpkt->size >= 2 * (avctx->height + skip) *
2 * avctx->width + 4 + 8 * interlaced;
srca = src + (2 * avctx->height + skip[0] + skip[1]) * avctx->width
srca = src + 2 * (avctx->height + skip) * avctx->width
+ 5 + interlaced * 4;
pic->reference = 0;
@ -78,13 +78,13 @@ static int avui_decode_frame(AVCodecContext *avctx, void *data,
pic->pict_type = AV_PICTURE_TYPE_I;
if (!interlaced) {
src += avctx->width * skip[1];
srca += avctx->width * skip[1];
src += avctx->width * skip;
srca += avctx->width * skip;
}
for (i = 0; i < interlaced + 1; i++) {
src += avctx->width * skip[i];
srca += avctx->width * skip[i];
src += avctx->width * skip;
srca += avctx->width * skip;
if (interlaced && avctx->height == 486) {
y = pic->data[0] + (1 - i) * pic->linesize[0];
u = pic->data[1] + (1 - i) * pic->linesize[1];