av_cold int ff_h263_decode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
s->avctx = avctx;
s->out_format = FMT_H263;
s->width = avctx->coded_width;
s->height = avctx->coded_height;
s->workaround_bugs= avctx->workaround_bugs;
// set defaults
MPV_decode_defaults(s);
s->quant_precision=5;
s->decode_mb= ff_h263_decode_mb;
s->low_delay= 1;
avctx->pix_fmt= avctx->get_format(avctx, avctx->codec->pix_fmts);
s->unrestricted_mv= 1;
/* select sub codec */
switch(avctx->codec->id) {
case CODEC_ID_H263:
s->unrestricted_mv= 0;
avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
break;
case CODEC_ID_MPEG4:
break;
case CODEC_ID_MSMPEG4V1:
s->h263_pred = 1;
s->msmpeg4_version=1;
break;
case CODEC_ID_MSMPEG4V2:
s->h263_pred = 1;
s->msmpeg4_version=2;
break;
case CODEC_ID_MSMPEG4V3:
s->h263_pred = 1;
s->msmpeg4_version=3;
break;
case CODEC_ID_WMV1:
s->h263_pred = 1;
s->msmpeg4_version=4;
break;
case CODEC_ID_WMV2:
s->h263_pred = 1;
s->msmpeg4_version=5;
break;
case CODEC_ID_VC1:
case CODEC_ID_WMV3:
case CODEC_ID_VC1IMAGE:
case CODEC_ID_WMV3IMAGE:
s->h263_pred = 1;
s->msmpeg4_version=6;
avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
break;
case CODEC_ID_H263I:
break;
case CODEC_ID_FLV1:
s->h263_flv = 1;
break;
default:
return -1;
}
s->codec_id= avctx->codec->id;
avctx->hwaccel= ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
/* for h263, we allocate the images after having read the header */
if (avctx->codec->id != CODEC_ID_H263 && avctx->codec->id != CODEC_ID_MPEG4)
if (MPV_common_init(s) < 0)
return -1;
h263_decode_init_vlc(s);
return 0;
}
av_cold int ff_h263_decode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
int ret;
s->avctx = avctx;
s->out_format = FMT_H263;
s->width = avctx->coded_width;
s->height = avctx->coded_height;
s->workaround_bugs = avctx->workaround_bugs;
// set defaults
ff_MPV_decode_defaults(s);
s->quant_precision = 5;
s->decode_mb = ff_h263_decode_mb;
s->low_delay = 1;
if (avctx->codec->id == AV_CODEC_ID_MSS2)
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
else
avctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts);
s->unrestricted_mv = 1;
/* select sub codec */
switch (avctx->codec->id) {
case AV_CODEC_ID_H263:
s->unrestricted_mv = 0;
avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
break;
case AV_CODEC_ID_MPEG4:
break;
case AV_CODEC_ID_MSMPEG4V1:
s->h263_pred = 1;
s->msmpeg4_version = 1;
break;
case AV_CODEC_ID_MSMPEG4V2:
s->h263_pred = 1;
s->msmpeg4_version = 2;
break;
case AV_CODEC_ID_MSMPEG4V3:
s->h263_pred = 1;
s->msmpeg4_version = 3;
break;
case AV_CODEC_ID_WMV1:
s->h263_pred = 1;
s->msmpeg4_version = 4;
break;
case AV_CODEC_ID_WMV2:
s->h263_pred = 1;
s->msmpeg4_version = 5;
break;
case AV_CODEC_ID_VC1:
case AV_CODEC_ID_WMV3:
case AV_CODEC_ID_VC1IMAGE:
case AV_CODEC_ID_WMV3IMAGE:
case AV_CODEC_ID_MSS2:
s->h263_pred = 1;
s->msmpeg4_version = 6;
avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
break;
case AV_CODEC_ID_H263I:
break;
case AV_CODEC_ID_FLV1:
s->h263_flv = 1;
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unsupported codec %d\n",
avctx->codec->id);
return AVERROR(ENOSYS);
}
s->codec_id = avctx->codec->id;
avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
/* for h263, we allocate the images after having read the header */
if (avctx->codec->id != AV_CODEC_ID_H263 &&
avctx->codec->id != AV_CODEC_ID_MPEG4)
if ((ret = ff_MPV_common_init(s)) < 0)
return ret;
ff_h263dsp_init(&s->h263dsp);
ff_h263_decode_init_vlc();
return 0;
}
