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avcodec/mjpegdec: upgrade upscale_v to support multiple planes

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
pull/64/head
Michael Niedermayer 11 years ago
parent f9059ce794
commit 798490812a
1 changed files with 22 additions and 17 deletions
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  1. 27
      libavcodec/mjpegdec.c

27
libavcodec/mjpegdec.c
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@ -414,7 +414,7 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
else
goto unk_pixfmt;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
s->upscale_v = 2;
s->upscale_v = 4;
s->upscale_h = 2*(pix_fmt_id == 0x22122100);
s->chroma_height = s->height;
break;
@ -424,7 +424,7 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
else
goto unk_pixfmt;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
s->upscale_v = (pix_fmt_id == 0x22211200);
s->upscale_v = 2*(pix_fmt_id == 0x22211200);
s->upscale_h = 4;
s->chroma_height = s->height;
break;
@ -433,7 +433,7 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
else
goto unk_pixfmt;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
s->upscale_v = 2;
s->upscale_v = 4;
s->upscale_h = 4;
s->chroma_height = s->height / 2;
break;
@ -472,7 +472,7 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
else
goto unk_pixfmt;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
s->upscale_v = 2 << (pix_fmt_id == 0x22121100);
break;
case 0x22111100:
if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
@ -2052,24 +2052,29 @@ the_end:
}
}
if (s->upscale_v) {
uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
int w;
avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
w = s->width >> hshift;
int p;
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);
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]];
int w;
if (!(s->upscale_v & (1<<p)))
continue;
w = s->width >> hshift;
for (i = s->height - 1; i; i--) {
uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
if (src1 == src2) {
memcpy(dst, src1, w);
} else {
for (index = 0; index < w; index++)
dst[index] = (src1[index] + src2[index]) >> 1;
}
dst -= s->linesize[s->upscale_v];
dst -= s->linesize[p];
}
}
}
if (s->flipped) {

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