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| author | Carl Eugen Hoyos <ceffmpeg@gmail.com> | 2018-10-18 00:25:16 +0200 |
|---|---|---|
| committer | Carl Eugen Hoyos <ceffmpeg@gmail.com> | 2018-10-18 00:25:16 +0200 |
| commit | e90d4e92729c519e2267fce51e37713e879ef59d (patch) | |
| tree | 1359dd82cfb00c0319a20e0af2c83b2d7433bb05 | |
| parent | b9136c1b90031fdd96bf217d898e3dd521fccde9 (diff) | |
| download | ffmpeg-e90d4e92729c519e2267fce51e37713e879ef59d.tar.gz | |
lavc/mjpegdec: Support 2:3 subsampling.
Fixes ticket #7495.
| -rw-r--r-- | libavcodec/mjpegdec.c | 13 | ||||
| -rw-r--r-- | libavcodec/version.h | 2 |
2 files changed, 10 insertions, 5 deletions
diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c index 35ee10d987..b0cb3ffc83 100644 --- a/libavcodec/mjpegdec.c +++ b/libavcodec/mjpegdec.c @@ -594,6 +594,7 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s) s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; break; case 0x22111100: + case 0x23111100: case 0x42111100: case 0x24111100: if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P; @@ -607,6 +608,10 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s) if (s->bits > 8) goto unk_pixfmt; s->upscale_v[1] = s->upscale_v[2] = 1; + } else if (pix_fmt_id == 0x23111100) { + if (s->bits > 8) + goto unk_pixfmt; + s->upscale_v[1] = s->upscale_v[2] = 2; } break; case 0x41111100: @@ -2528,7 +2533,7 @@ the_end: w = AV_CEIL_RSHIFT(w, hshift); h = AV_CEIL_RSHIFT(h, vshift); } - if (s->upscale_v[p]) + if (s->upscale_v[p] == 1) h = (h+1)>>1; av_assert0(w > 0); for (i = 0; i < h; i++) { @@ -2592,9 +2597,9 @@ the_end: } dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]]; for (i = h - 1; i; i--) { - 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 || i == h - 1) { + uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i * s->upscale_v[p] / (s->upscale_v[p] + 1) * s->linesize[p]]; + uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) * s->upscale_v[p] / (s->upscale_v[p] + 1) * s->linesize[p]]; + if (s->upscale_v[p] != 2 && (src1 == src2 || i == h - 1)) { memcpy(dst, src1, w); } else { for (index = 0; index < w; index++) diff --git a/libavcodec/version.h b/libavcodec/version.h index 7e51585661..0d9a28f432 100644 --- a/libavcodec/version.h +++ b/libavcodec/version.h @@ -29,7 +29,7 @@ #define LIBAVCODEC_VERSION_MAJOR 58 #define LIBAVCODEC_VERSION_MINOR 33 -#define LIBAVCODEC_VERSION_MICRO 100 +#define LIBAVCODEC_VERSION_MICRO 101 #define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \ LIBAVCODEC_VERSION_MINOR, \ |