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Code Issues Releases Activity

Fix interlaced vc-3 decoding, issue #1753

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Originally committed as revision 22362 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2010-03-09 00:37:13 +00:00
parent ff65969fd8
commit 1307463d52
1 changed files with 15 additions and 3 deletions
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18
libavcodec/dnxhddec.c
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@ -126,12 +126,17 @@ static int dnxhd_decode_header(DNXHDContext *ctx, const uint8_t *buf, int buf_si
ctx->mb_width = ctx->width>>4;
ctx->mb_height = buf[0x16d];
if (ctx->mb_height > 68) {
av_log(ctx->avctx, AV_LOG_ERROR, "mb height too big\n");
dprintf(ctx->avctx, "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height);
if ((ctx->height+15)>>4 == ctx->mb_height && ctx->picture.interlaced_frame)
ctx->height <<= 1;
if (ctx->mb_height > 68 ||
(ctx->mb_height<<ctx->picture.interlaced_frame) > (ctx->height+15)>>4) {
av_log(ctx->avctx, AV_LOG_ERROR, "mb height too big: %d\n", ctx->mb_height);
return -1;
}
dprintf(ctx->avctx, "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height);
for (i = 0; i < ctx->mb_height; i++) {
ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i<<2));
dprintf(ctx->avctx, "mb scan index %d\n", ctx->mb_scan_index[i]);
@ -292,6 +297,13 @@ static int dnxhd_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
if (dnxhd_decode_header(ctx, buf, buf_size, first_field) < 0)
return -1;
if ((avctx->width || avctx->height) &&
(ctx->width != avctx->width || ctx->height != avctx->height)) {
av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %dx%d\n",
avctx->width, avctx->height, ctx->width, ctx->height);
first_field = 1;
}
avctx->pix_fmt = PIX_FMT_YUV422P;
if (avcodec_check_dimensions(avctx, ctx->width, ctx->height))
return -1;