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avcodec/mjpegdec: support subsampled 420 CMYK

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-03-31 17:04:38 +02:00
parent 798490812a
commit 559c8b9ee9
1 changed files with 19 additions and 2 deletions
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21
libavcodec/mjpegdec.c
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@ -408,6 +408,19 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
}
av_assert0(s->nb_components == 4);
break;
case 0x22111122:
if (s->adobe_transform == 0 && s->bits <= 8) {
s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
s->upscale_v = 6;
s->upscale_h = 6;
s->chroma_height = s->height;
} else {
if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
}
av_assert0(s->nb_components == 4);
break;
case 0x12121100:
case 0x22122100:
if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
@ -2039,7 +2052,9 @@ the_end:
av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
avctx->pix_fmt == AV_PIX_FMT_YUV440P);
avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
avctx->pix_fmt == AV_PIX_FMT_GBRAP
);
for (p = 1; p<4; p++) {
uint8_t *line = s->picture_ptr->data[p];
if (!(s->upscale_h & (1<<p)))
@ -2056,7 +2071,9 @@ the_end:
av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
avctx->pix_fmt == AV_PIX_FMT_YUV422P);
avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
avctx->pix_fmt == AV_PIX_FMT_GBRAP
);
avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
for (p = 1; p < 4; p++) {
uint8_t *dst = &((uint8_t *)s->picture_ptr->data[p])[(s->height - 1) * s->linesize[p]];