[FFmpeg-cvslog] avcodec/lcldec: Support 4:1:1 and 4:2:2 with odd width
Michael Niedermayer
git at videolan.org
Thu Oct 19 14:31:21 EEST 2023
ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Thu Mar 9 13:57:15 2023 +0100| [5e2e0254b0fd40a0d4b11eb508b887dabee66d81] | committer: Michael Niedermayer
avcodec/lcldec: Support 4:1:1 and 4:2:2 with odd width
Fixes: Ticket10240
Fixes: zlib_306_306_yuv422.avi
Fixes: zlib_306_306_yuv411.avi
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 0cf1ac905d2d97355a389c3baa4e132824b29f21)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5e2e0254b0fd40a0d4b11eb508b887dabee66d81
---
libavcodec/lcldec.c | 22 +++++++++++++++-------
1 file changed, 15 insertions(+), 7 deletions(-)
diff --git a/libavcodec/lcldec.c b/libavcodec/lcldec.c
index 0b7f5df045..fc96151a98 100644
--- a/libavcodec/lcldec.c
+++ b/libavcodec/lcldec.c
@@ -406,6 +406,11 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPac
v_out[ col >> 1 ] = *encoded++ + 128;
v_out[(col >> 1) + 1] = *encoded++ + 128;
}
+ if (col && col < width) {
+ u_out[ col >> 1 ] = u_out[(col>>1) - 1];
+ v_out[ col >> 1 ] = v_out[(col>>1) - 1];
+ }
+
y_out -= frame->linesize[0];
u_out -= frame->linesize[1];
v_out -= frame->linesize[2];
@@ -427,6 +432,10 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPac
u_out[col >> 2] = *encoded++ + 128;
v_out[col >> 2] = *encoded++ + 128;
}
+ if (col && col < width) {
+ u_out[col >> 2] = u_out[(col>>2) - 1];
+ v_out[col >> 2] = v_out[(col>>2) - 1];
+ }
y_out -= frame->linesize[0];
u_out -= frame->linesize[1];
v_out -= frame->linesize[2];
@@ -486,6 +495,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
FFALIGN(avctx->height, 4);
unsigned int max_decomp_size;
int subsample_h, subsample_v;
+ int partial_h_supported = 0;
if (avctx->extradata_size < 8) {
av_log(avctx, AV_LOG_ERROR, "Extradata size too small.\n");
@@ -507,14 +517,11 @@ static av_cold int decode_init(AVCodecContext *avctx)
av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 1:1:1.\n");
break;
case IMGTYPE_YUV422:
- c->decomp_size = basesize * 2;
+ c->decomp_size = (avctx->width & ~3) * avctx->height * 2;
max_decomp_size = max_basesize * 2;
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 4:2:2.\n");
- if (avctx->width % 4) {
- avpriv_request_sample(avctx, "Unsupported dimensions");
- return AVERROR_INVALIDDATA;
- }
+ partial_h_supported = 1;
break;
case IMGTYPE_RGB24:
c->decomp_size = basesize * 3;
@@ -523,10 +530,11 @@ static av_cold int decode_init(AVCodecContext *avctx)
av_log(avctx, AV_LOG_DEBUG, "Image type is RGB 24.\n");
break;
case IMGTYPE_YUV411:
- c->decomp_size = basesize / 2 * 3;
+ c->decomp_size = (avctx->width & ~3) * avctx->height / 2 * 3;
max_decomp_size = max_basesize / 2 * 3;
avctx->pix_fmt = AV_PIX_FMT_YUV411P;
av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 4:1:1.\n");
+ partial_h_supported = 1;
break;
case IMGTYPE_YUV211:
c->decomp_size = basesize * 2;
@@ -546,7 +554,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
}
av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &subsample_h, &subsample_v);
- if (avctx->width % (1<<subsample_h) || avctx->height % (1<<subsample_v)) {
+ if ((avctx->width % (1<<subsample_h) && !partial_h_supported) || avctx->height % (1<<subsample_v)) {
avpriv_request_sample(avctx, "Unsupported dimensions");
return AVERROR_INVALIDDATA;
}
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