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Code Issues Releases Activity

avcodec/mpeg12dec: Recalculate SAR unconditionally

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Fixes Ticket4161

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-01-02 02:33:34 +01:00
parent aeb36fd207
commit 1010b36d86
1 changed files with 44 additions and 40 deletions
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84
libavcodec/mpeg12dec.c
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@ -1273,6 +1273,50 @@ static int mpeg_decode_postinit(AVCodecContext *avctx)
uint8_t old_permutation[64];
int ret;
if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
// MPEG-1 aspect
avctx->sample_aspect_ratio = av_d2q(1.0 / ff_mpeg1_aspect[s->aspect_ratio_info], 255);
} else { // MPEG-2
// MPEG-2 aspect
if (s->aspect_ratio_info > 1) {
AVRational dar =
av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
(AVRational) { s1->pan_scan.width,
s1->pan_scan.height }),
(AVRational) { s->width, s->height });
/* We ignore the spec here and guess a bit as reality does not
* match the spec, see for example res_change_ffmpeg_aspect.ts
* and sequence-display-aspect.mpg.
* issue1613, 621, 562 */
if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
(av_cmp_q(dar, (AVRational) { 4, 3 }) &&
av_cmp_q(dar, (AVRational) { 16, 9 }))) {
s->avctx->sample_aspect_ratio =
av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
(AVRational) { s->width, s->height });
} else {
s->avctx->sample_aspect_ratio =
av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
(AVRational) { s1->pan_scan.width, s1->pan_scan.height });
// issue1613 4/3 16/9 -> 16/9
// res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
// widescreen-issue562.mpg 4/3 16/9 -> 16/9
// s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
av_dlog(avctx, "A %d/%d\n",
ff_mpeg2_aspect[s->aspect_ratio_info].num,
ff_mpeg2_aspect[s->aspect_ratio_info].den);
av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
s->avctx->sample_aspect_ratio.den);
}
} else {
s->avctx->sample_aspect_ratio =
ff_mpeg2_aspect[s->aspect_ratio_info];
}
} // MPEG-2
ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
if ((s1->mpeg_enc_ctx_allocated == 0) ||
avctx->coded_width != s->width ||
avctx->coded_height != s->height ||
@ -1311,8 +1355,6 @@ static int mpeg_decode_postinit(AVCodecContext *avctx)
if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
// MPEG-1 fps
avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
// MPEG-1 aspect
avctx->sample_aspect_ratio = av_d2q(1.0 / ff_mpeg1_aspect[s->aspect_ratio_info], 255);
avctx->ticks_per_frame = 1;
} else { // MPEG-2
// MPEG-2 fps
@ -1322,46 +1364,8 @@ static int mpeg_decode_postinit(AVCodecContext *avctx)
ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1 << 30);
avctx->ticks_per_frame = 2;
// MPEG-2 aspect
if (s->aspect_ratio_info > 1) {
AVRational dar =
av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
(AVRational) { s1->pan_scan.width,
s1->pan_scan.height }),
(AVRational) { s->width, s->height });
/* We ignore the spec here and guess a bit as reality does not
* match the spec, see for example res_change_ffmpeg_aspect.ts
* and sequence-display-aspect.mpg.
* issue1613, 621, 562 */
if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
(av_cmp_q(dar, (AVRational) { 4, 3 }) &&
av_cmp_q(dar, (AVRational) { 16, 9 }))) {
s->avctx->sample_aspect_ratio =
av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
(AVRational) { s->width, s->height });
} else {
s->avctx->sample_aspect_ratio =
av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
(AVRational) { s1->pan_scan.width, s1->pan_scan.height });
// issue1613 4/3 16/9 -> 16/9
// res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
// widescreen-issue562.mpg 4/3 16/9 -> 16/9
// s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
av_dlog(avctx, "A %d/%d\n",
ff_mpeg2_aspect[s->aspect_ratio_info].num,
ff_mpeg2_aspect[s->aspect_ratio_info].den);
av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
s->avctx->sample_aspect_ratio.den);
}
} else {
s->avctx->sample_aspect_ratio =
ff_mpeg2_aspect[s->aspect_ratio_info];
}
} // MPEG-2
ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
avctx->pix_fmt = mpeg_get_pixelformat(avctx);
setup_hwaccel_for_pixfmt(avctx);