static av_cold int decode_init(AVCodecContext *avctx)
{
HYuvContext *s = avctx->priv_data;
ff_huffyuv_common_init(avctx);
memset(s->vlc, 0, 3 * sizeof(VLC));
avctx->coded_frame = &s->picture;
s->interlaced = s->height > 288;
s->bgr32 = 1;
if (avctx->extradata_size) {
if ((avctx->bits_per_coded_sample & 7) &&
avctx->bits_per_coded_sample != 12)
s->version = 1; // do such files exist at all?
else
s->version = 2;
} else
s->version = 0;
if (s->version == 2) {
int method, interlace;
if (avctx->extradata_size < 4)
return -1;
method = ((uint8_t*)avctx->extradata)[0];
s->decorrelate = method & 64 ? 1 : 0;
s->predictor = method & 63;
s->bitstream_bpp = ((uint8_t*)avctx->extradata)[1];
if (s->bitstream_bpp == 0)
s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
interlace = (((uint8_t*)avctx->extradata)[2] & 0x30) >> 4;
s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
s->context = ((uint8_t*)avctx->extradata)[2] & 0x40 ? 1 : 0;
if ( read_huffman_tables(s, ((uint8_t*)avctx->extradata) + 4,
avctx->extradata_size - 4) < 0)
return -1;
}else{
static av_cold int decode_init(AVCodecContext *avctx)
{
HYuvContext *s = avctx->priv_data;
int ret;
ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
if (ret < 0)
return ret;
ff_huffyuvdsp_init(&s->hdsp, avctx->pix_fmt);
ff_llviddsp_init(&s->llviddsp);
memset(s->vlc, 0, 4 * sizeof(VLC));
s->interlaced = avctx->height > 288;
s->bgr32 = 1;
if (avctx->extradata_size) {
if ((avctx->bits_per_coded_sample & 7) &&
avctx->bits_per_coded_sample != 12)
s->version = 1; // do such files exist at all?
else if (avctx->extradata_size > 3 && avctx->extradata[3] == 0)
s->version = 2;
else
s->version = 3;
} else
s->version = 0;
s->bps = 8;
s->n = 1<<s->bps;
s->vlc_n = FFMIN(s->n, MAX_VLC_N);
s->chroma = 1;
if (s->version >= 2) {
int method, interlace;
if (avctx->extradata_size < 4)
return AVERROR_INVALIDDATA;
method = avctx->extradata[0];
s->decorrelate = method & 64 ? 1 : 0;
s->predictor = method & 63;
if (s->version == 2) {
s->bitstream_bpp = avctx->extradata[1];
if (s->bitstream_bpp == 0)
s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
} else {
s->bps = (avctx->extradata[1] >> 4) + 1;
s->n = 1<<s->bps;
s->vlc_n = FFMIN(s->n, MAX_VLC_N);
s->chroma_h_shift = avctx->extradata[1] & 3;
s->chroma_v_shift = (avctx->extradata[1] >> 2) & 3;
s->yuv = !!(avctx->extradata[2] & 1);
s->chroma= !!(avctx->extradata[2] & 3);
s->alpha = !!(avctx->extradata[2] & 4);
}
interlace = (avctx->extradata[2] & 0x30) >> 4;
s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
s->context = avctx->extradata[2] & 0x40 ? 1 : 0;
if ((ret = read_huffman_tables(s, avctx->extradata + 4,
avctx->extradata_size - 4)) < 0)
goto error;
} else {
static int decode_init(AVCodecContext *avctx)
{
HYuvContext *s = avctx->priv_data;
int width, height;
s->avctx= avctx;
s->flags= avctx->flags;
dsputil_init(&s->dsp, avctx);
width= s->width= avctx->width;
height= s->height= avctx->height;
avctx->coded_frame= &s->picture;
s->bgr32=1;
assert(width && height);
//if(avctx->extradata)
// printf("extradata:%X, extradata_size:%d\n", *(uint32_t*)avctx->extradata, avctx->extradata_size);
if(avctx->extradata_size){
if((avctx->bits_per_sample&7) && avctx->bits_per_sample != 12)
s->version=1; // do such files exist at all?
else
s->version=2;
}else
s->version=0;
if(s->version==2){
int method;
method= ((uint8_t*)avctx->extradata)[0];
s->decorrelate= method&64 ? 1 : 0;
s->predictor= method&63;
s->bitstream_bpp= ((uint8_t*)avctx->extradata)[1];
if(s->bitstream_bpp==0)
s->bitstream_bpp= avctx->bits_per_sample&~7;
if(read_huffman_tables(s, ((uint8_t*)avctx->extradata)+4, avctx->extradata_size) < 0)
return -1;
}else{
switch(avctx->bits_per_sample&7){
case 1:
s->predictor= LEFT;
s->decorrelate= 0;
break;
case 2:
s->predictor= LEFT;
s->decorrelate= 1;
break;
case 3:
s->predictor= PLANE;
s->decorrelate= avctx->bits_per_sample >= 24;
break;
case 4:
s->predictor= MEDIAN;
s->decorrelate= 0;
break;
default:
s->predictor= LEFT; //OLD
s->decorrelate= 0;
break;
}
s->bitstream_bpp= avctx->bits_per_sample & ~7;
if(read_old_huffman_tables(s) < 0)
return -1;
}
s->interlaced= height > 288;
switch(s->bitstream_bpp){
case 12:
avctx->pix_fmt = PIX_FMT_YUV420P;
break;
case 16:
if(s->yuy2){
avctx->pix_fmt = PIX_FMT_YUV422;
}else{
avctx->pix_fmt = PIX_FMT_YUV422P;
}
break;
case 24:
case 32:
if(s->bgr32){
avctx->pix_fmt = PIX_FMT_RGBA32;
}else{
avctx->pix_fmt = PIX_FMT_BGR24;
}
break;
default:
assert(0);
}
// printf("pred:%d bpp:%d hbpp:%d il:%d\n", s->predictor, s->bitstream_bpp, avctx->bits_per_sample, s->interlaced);
return 0;
}
