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Code Issues Releases Activity

Support more Avid Meridien / AVUI samples.

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Fixes ticket #1288.
This commit is contained in:
Carl Eugen Hoyos 2012-05-16 08:29:56 +02:00
parent 88d5cfe7c8
commit 183596fa08
1 changed files with 31 additions and 14 deletions
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45
libavcodec/avuidec.c
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@ -41,19 +41,31 @@ static int avui_decode_frame(AVCodecContext *avctx, void *data,
{
AVFrame *pic = avctx->coded_frame;
const uint8_t *src = avpkt->data;
const uint8_t *srca = src + 2 * (avctx->height + 16) * avctx->width + 9;
const uint8_t *srca;
uint8_t *y, *u, *v, *a;
int transparent = 0, i, j, k;
int transparent, interlaced = 1, skip[2], i, j, k;
if (pic->data[0])
avctx->release_buffer(avctx, pic);
if (avpkt->size < 2 * avctx->width * (avctx->height + 16) + 4) {
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] = 8;
skip[1] = 12;
}
if (avpkt->size < avctx->width * (2 * avctx->height + skip[0] + skip[1])
+ 4 * interlaced) {
av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
return AVERROR(EINVAL);
}
if (avpkt->size >= 4 * avctx->width * (avctx->height + 16) + 13)
transparent = 1;
transparent = avctx->bits_per_coded_sample == 32 &&
avpkt->size >= (2 * avctx->height + skip[0] + skip[1]) *
2 * avctx->width + 4 + 8 * interlaced;
srca = src + (2 * avctx->height + skip[0] + skip[1]) * avctx->width
+ 5 + interlaced * 4;
pic->reference = 0;
@ -65,16 +77,21 @@ static int avui_decode_frame(AVCodecContext *avctx, void *data,
pic->key_frame = 1;
pic->pict_type = AV_PICTURE_TYPE_I;
for (i = 0; i < 2; i++) {
src += avctx->width * 16;
srca += avctx->width * 16;
if (!interlaced) {
src += avctx->width * skip[1];
srca += avctx->width * skip[1];
}
for (i = 0; i < interlaced + 1; i++) {
src += avctx->width * skip[i];
srca += avctx->width * skip[i];
y = pic->data[0] + i * pic->linesize[0];
u = pic->data[1] + i * pic->linesize[1];
v = pic->data[2] + i * pic->linesize[2];
a = pic->data[3] + i * pic->linesize[3];
for (j = 0; j < (avctx->height + 1) >> 1; j++) {
for (k = 0; k < (avctx->width + 1) >> 1; k++) {
for (j = 0; j < avctx->height >> interlaced; j++) {
for (k = 0; k < avctx->width >> 1; k++) {
u[ k ] = *src++;
y[2 * k ] = *src++;
a[2 * k ] = 0xFF - (transparent ? *srca++ : 0);
@ -85,10 +102,10 @@ static int avui_decode_frame(AVCodecContext *avctx, void *data,
srca++;
}
y += 2 * pic->linesize[0];
u += 2 * pic->linesize[1];
v += 2 * pic->linesize[2];
a += 2 * pic->linesize[3];
y += (interlaced + 1) * pic->linesize[0];
u += (interlaced + 1) * pic->linesize[1];
v += (interlaced + 1) * pic->linesize[2];
a += (interlaced + 1) * pic->linesize[3];
}
src += 4;
srca += 4;