2018-10-17 17:51 GMT+02:00, Michael Niedermayer <mich...@niedermayer.cc>: > On Wed, Oct 17, 2018 at 12:22:51AM +0200, Carl Eugen Hoyos wrote: >> Hi! >> >> Attached patch allows decoding the sample from ticket #7495. >> >> Please review, Carl Eugen > >> mjpegdec.c | 17 ++++++++++++++--- >> 1 file changed, 14 insertions(+), 3 deletions(-) >> 8f0d03a533b42c35f2bd8d5bdae4dabd24b18f4c >> 0001-lavc-mjpegdec-Support-2-3-subsampling.patch >> From 0e9d2ec4e0cba36ba03a6b7470a707c0a3f88b8c Mon Sep 17 00:00:00 2001 >> From: Carl Eugen Hoyos <ceffm...@gmail.com> >> Date: Wed, 17 Oct 2018 00:21:26 +0200 >> Subject: [PATCH] lavc/mjpegdec: Support 2:3 subsampling. >> >> Fixes ticket #7495. >> --- >> libavcodec/mjpegdec.c | 17 ++++++++++++++--- >> 1 file changed, 14 insertions(+), 3 deletions(-) > > breaks > make -j12 fate-tdsc
New patch attached, please review. Thank you, Carl Eugen
From 2a8917ad5f82184c10e41be776bf3d138b676a85 Mon Sep 17 00:00:00 2001 From: Carl Eugen Hoyos <ceffm...@gmail.com> Date: Wed, 17 Oct 2018 21:00:37 +0200 Subject: [PATCH] lavc/mjpegdec: Support 2:3 subsampling. Fixes ticket #7495. --- libavcodec/mjpegdec.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c index 35ee10d..cfc5de8 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: @@ -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++) -- 1.7.10.4
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