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xvid: switch to xvid mmx idct as soon as possible

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The idct implementation cannot be changed after the quantization matrices
are read since it use a different permutaion.

Bug-Id: videolan/7411
pull/57/head
Janne Grunau 11 years ago
parent 78987a88a8
commit 7716dd9fbb
1 changed files with 29 additions and 29 deletions
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  1. 58
      libavcodec/mpeg4videodec.c

58
libavcodec/mpeg4videodec.c
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@ -2044,6 +2044,35 @@ static int decode_user_data(Mpeg4DecContext *ctx, GetBitContext *gb)
if (e == 1)
ctx->xvid_build = build;
if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1) {
if (s->stream_codec_tag == AV_RL32("XVID") ||
s->codec_tag == AV_RL32("XVID") ||
s->codec_tag == AV_RL32("XVIX") ||
s->codec_tag == AV_RL32("RMP4") ||
s->codec_tag == AV_RL32("ZMP4") ||
s->codec_tag == AV_RL32("SIPP"))
ctx->xvid_build = 0;
}
if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1)
if (s->codec_tag == AV_RL32("DIVX") && s->vo_type == 0 &&
s->vol_control_parameters == 0)
ctx->divx_version = 400; // divx 4
if (ctx->xvid_build >= 0 && ctx->divx_version >= 0) {
ctx->divx_version =
ctx->divx_build = -1;
}
#if HAVE_MMX
if (ctx->xvid_build >= 0 &&
s->avctx->idct_algo == FF_IDCT_AUTO &&
(av_get_cpu_flags() & AV_CPU_FLAG_MMX)) {
s->avctx->idct_algo = FF_IDCT_XVIDMMX;
ff_dct_common_init(s);
}
#endif
return 0;
}
@ -2405,26 +2434,6 @@ end:
s->low_delay = 1;
s->avctx->has_b_frames = !s->low_delay;
if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1) {
if (s->stream_codec_tag == AV_RL32("XVID") ||
s->codec_tag == AV_RL32("XVID") ||
s->codec_tag == AV_RL32("XVIX") ||
s->codec_tag == AV_RL32("RMP4") ||
s->codec_tag == AV_RL32("ZMP4") ||
s->codec_tag == AV_RL32("SIPP"))
ctx->xvid_build = 0;
}
if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1)
if (s->codec_tag == AV_RL32("DIVX") && s->vo_type == 0 &&
s->vol_control_parameters == 0)
ctx->divx_version = 400; // divx 4
if (ctx->xvid_build >= 0 && ctx->divx_version >= 0) {
ctx->divx_version =
ctx->divx_build = -1;
}
if (s->workaround_bugs & FF_BUG_AUTODETECT) {
if (s->codec_tag == AV_RL32("XVIX"))
s->workaround_bugs |= FF_BUG_XVID_ILACE;
@ -2475,15 +2484,6 @@ end:
s->workaround_bugs |= FF_BUG_HPEL_CHROMA;
}
#if HAVE_MMX
if (s->codec_id == AV_CODEC_ID_MPEG4 && ctx->xvid_build >= 0 &&
s->avctx->idct_algo == FF_IDCT_AUTO &&
(av_get_cpu_flags() & AV_CPU_FLAG_MMX)) {
s->avctx->idct_algo = FF_IDCT_XVIDMMX;
ff_dct_common_init(s);
s->picture_number = 0;
}
#endif
if (s->avctx->debug & FF_DEBUG_BUGS)
av_log(s->avctx, AV_LOG_DEBUG,

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