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ffmpeg/libavcodec/vc1.c

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/*
* VC-1 and WMV3 decoder common code
* Copyright (c) 2006-2007 Konstantin Shishkov
* Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* VC-1 and WMV3 decoder common code
*
*/
#include "internal.h"
#include "dsputil.h"
#include "avcodec.h"
#include "mpegvideo.h"
#include "vc1.h"
#include "vc1data.h"
#include "msmpeg4data.h"
#include "unary.h"
#include "simple_idct.h"
#undef NDEBUG
#include <assert.h>
/***********************************************************************/
/**
* @defgroup vc1bitplane VC-1 Bitplane decoding
* @see 8.7, p56
* @{
*/
/**
* Imode types
* @{
*/
enum Imode {
IMODE_RAW,
IMODE_NORM2,
IMODE_DIFF2,
IMODE_NORM6,
IMODE_DIFF6,
IMODE_ROWSKIP,
IMODE_COLSKIP
};
/** @} */ //imode defines
/** Decode rows by checking if they are skipped
* @param plane Buffer to store decoded bits
* @param[in] width Width of this buffer
* @param[in] height Height of this buffer
* @param[in] stride of this buffer
*/
static void decode_rowskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
int x, y;
for (y=0; y<height; y++){
if (!get_bits1(gb)) //rowskip
memset(plane, 0, width);
else
for (x=0; x<width; x++)
plane[x] = get_bits1(gb);
plane += stride;
}
}
/** Decode columns by checking if they are skipped
* @param plane Buffer to store decoded bits
* @param[in] width Width of this buffer
* @param[in] height Height of this buffer
* @param[in] stride of this buffer
* @todo FIXME: Optimize
*/
static void decode_colskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
int x, y;
for (x=0; x<width; x++){
if (!get_bits1(gb)) //colskip
for (y=0; y<height; y++)
plane[y*stride] = 0;
else
for (y=0; y<height; y++)
plane[y*stride] = get_bits1(gb);
plane ++;
}
}
/** Decode a bitplane's bits
* @param data bitplane where to store the decode bits
* @param[out] raw_flag pointer to the flag indicating that this bitplane is not coded explicitly
* @param v VC-1 context for bit reading and logging
* @return Status
* @todo FIXME: Optimize
*/
static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
{
GetBitContext *gb = &v->s.gb;
int imode, x, y, code, offset;
uint8_t invert, *planep = data;
int width, height, stride;
width = v->s.mb_width;
height = v->s.mb_height;
stride = v->s.mb_stride;
invert = get_bits1(gb);
imode = get_vlc2(gb, ff_vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1);
*raw_flag = 0;
switch (imode)
{
case IMODE_RAW:
//Data is actually read in the MB layer (same for all tests == "raw")
*raw_flag = 1; //invert ignored
return invert;
case IMODE_DIFF2:
case IMODE_NORM2:
if ((height * width) & 1)
{
*planep++ = get_bits1(gb);
offset = 1;
}
else offset = 0;
// decode bitplane as one long line
for (y = offset; y < height * width; y += 2) {
code = get_vlc2(gb, ff_vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1);
*planep++ = code & 1;
offset++;
if(offset == width) {
offset = 0;
planep += stride - width;
}
*planep++ = code >> 1;
offset++;
if(offset == width) {
offset = 0;
planep += stride - width;
}
}
break;
case IMODE_DIFF6:
case IMODE_NORM6:
if(!(height % 3) && (width % 3)) { // use 2x3 decoding
for(y = 0; y < height; y+= 3) {
for(x = width & 1; x < width; x += 2) {
code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
if(code < 0){
av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
return -1;
}
planep[x + 0] = (code >> 0) & 1;
planep[x + 1] = (code >> 1) & 1;
planep[x + 0 + stride] = (code >> 2) & 1;
planep[x + 1 + stride] = (code >> 3) & 1;
planep[x + 0 + stride * 2] = (code >> 4) & 1;
planep[x + 1 + stride * 2] = (code >> 5) & 1;
}
planep += stride * 3;
}
if(width & 1) decode_colskip(data, 1, height, stride, &v->s.gb);
} else { // 3x2
planep += (height & 1) * stride;
for(y = height & 1; y < height; y += 2) {
for(x = width % 3; x < width; x += 3) {
code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
if(code < 0){
av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
return -1;
}
planep[x + 0] = (code >> 0) & 1;
planep[x + 1] = (code >> 1) & 1;
planep[x + 2] = (code >> 2) & 1;
planep[x + 0 + stride] = (code >> 3) & 1;
planep[x + 1 + stride] = (code >> 4) & 1;
planep[x + 2 + stride] = (code >> 5) & 1;
}
planep += stride * 2;
}
x = width % 3;
if(x) decode_colskip(data , x, height , stride, &v->s.gb);
if(height & 1) decode_rowskip(data+x, width - x, 1, stride, &v->s.gb);
}
break;
case IMODE_ROWSKIP:
decode_rowskip(data, width, height, stride, &v->s.gb);
break;
case IMODE_COLSKIP:
decode_colskip(data, width, height, stride, &v->s.gb);
break;
default: break;
}
/* Applying diff operator */
if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6)
{
planep = data;
planep[0] ^= invert;
for (x=1; x<width; x++)
planep[x] ^= planep[x-1];
for (y=1; y<height; y++)
{
planep += stride;
planep[0] ^= planep[-stride];
for (x=1; x<width; x++)
{
if (planep[x-1] != planep[x-stride]) planep[x] ^= invert;
else planep[x] ^= planep[x-1];
}
}
}
else if (invert)
{
planep = data;
for (x=0; x<stride*height; x++) planep[x] = !planep[x]; //FIXME stride
}
return (imode<<1) + invert;
}
/** @} */ //Bitplane group
/***********************************************************************/
/** VOP Dquant decoding
* @param v VC-1 Context
*/
static int vop_dquant_decoding(VC1Context *v)
{
GetBitContext *gb = &v->s.gb;
int pqdiff;
//variable size
if (v->dquant == 2)
{
pqdiff = get_bits(gb, 3);
if (pqdiff == 7) v->altpq = get_bits(gb, 5);
else v->altpq = v->pq + pqdiff + 1;
}
else
{
v->dquantfrm = get_bits1(gb);
if ( v->dquantfrm )
{
v->dqprofile = get_bits(gb, 2);
switch (v->dqprofile)
{
case DQPROFILE_SINGLE_EDGE:
case DQPROFILE_DOUBLE_EDGES:
v->dqsbedge = get_bits(gb, 2);
break;
case DQPROFILE_ALL_MBS:
v->dqbilevel = get_bits1(gb);
if(!v->dqbilevel)
v->halfpq = 0;
default: break; //Forbidden ?
}
if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)
{
pqdiff = get_bits(gb, 3);
if (pqdiff == 7) v->altpq = get_bits(gb, 5);
else v->altpq = v->pq + pqdiff + 1;
}
}
}
return 0;
}
static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb);
/**
* Decode Simple/Main Profiles sequence header
* @see Figure 7-8, p16-17
* @param avctx Codec context
* @param gb GetBit context initialized from Codec context extra_data
* @return Status
*/
int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
{
av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));
v->profile = get_bits(gb, 2);
if (v->profile == PROFILE_COMPLEX)
{
av_log(avctx, AV_LOG_WARNING, "WMV3 Complex Profile is not fully supported\n");
}
if (v->profile == PROFILE_ADVANCED)
{
v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;
v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;
return decode_sequence_header_adv(v, gb);
}
else
{
v->zz_8x4 = wmv2_scantableA;
v->zz_4x8 = wmv2_scantableB;
v->res_y411 = get_bits1(gb);
v->res_sprite = get_bits1(gb);
if (v->res_y411)
{
av_log(avctx, AV_LOG_ERROR,
"Old interlaced mode is not supported\n");
return -1;
}
if (v->res_sprite) {
av_log(avctx, AV_LOG_ERROR, "WMVP is not fully supported\n");
}
}
// (fps-2)/4 (->30)
v->frmrtq_postproc = get_bits(gb, 3); //common
// (bitrate-32kbps)/64kbps
v->bitrtq_postproc = get_bits(gb, 5); //common
v->s.loop_filter = get_bits1(gb); //common
if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE)
{
av_log(avctx, AV_LOG_ERROR,
"LOOPFILTER shall not be enabled in Simple Profile\n");
}
if(v->s.avctx->skip_loop_filter >= AVDISCARD_ALL)
v->s.loop_filter = 0;
v->res_x8 = get_bits1(gb); //reserved
v->multires = get_bits1(gb);
v->res_fasttx = get_bits1(gb);
if (!v->res_fasttx)
{
v->vc1dsp.vc1_inv_trans_8x8 = ff_simple_idct;
v->vc1dsp.vc1_inv_trans_8x4 = ff_simple_idct84_add;
v->vc1dsp.vc1_inv_trans_4x8 = ff_simple_idct48_add;
v->vc1dsp.vc1_inv_trans_4x4 = ff_simple_idct44_add;
v->vc1dsp.vc1_inv_trans_8x8_dc = ff_simple_idct_add;
v->vc1dsp.vc1_inv_trans_8x4_dc = ff_simple_idct84_add;
v->vc1dsp.vc1_inv_trans_4x8_dc = ff_simple_idct48_add;
v->vc1dsp.vc1_inv_trans_4x4_dc = ff_simple_idct44_add;
}
v->fastuvmc = get_bits1(gb); //common
if (!v->profile && !v->fastuvmc)
{
av_log(avctx, AV_LOG_ERROR,
"FASTUVMC unavailable in Simple Profile\n");
return -1;
}
v->extended_mv = get_bits1(gb); //common
if (!v->profile && v->extended_mv)
{
av_log(avctx, AV_LOG_ERROR,
"Extended MVs unavailable in Simple Profile\n");
return -1;
}
v->dquant = get_bits(gb, 2); //common
v->vstransform = get_bits1(gb); //common
v->res_transtab = get_bits1(gb);
if (v->res_transtab)
{
av_log(avctx, AV_LOG_ERROR,
"1 for reserved RES_TRANSTAB is forbidden\n");
return -1;
}
v->overlap = get_bits1(gb); //common
v->s.resync_marker = get_bits1(gb);
v->rangered = get_bits1(gb);
if (v->rangered && v->profile == PROFILE_SIMPLE)
{
av_log(avctx, AV_LOG_INFO,
"RANGERED should be set to 0 in Simple Profile\n");
}
v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common
v->quantizer_mode = get_bits(gb, 2); //common
v->finterpflag = get_bits1(gb); //common
if (v->res_sprite) {
v->s.avctx->width = v->s.avctx->coded_width = get_bits(gb, 11);
v->s.avctx->height = v->s.avctx->coded_height = get_bits(gb, 11);
skip_bits(gb, 5); //frame rate
v->res_x8 = get_bits1(gb);
if (get_bits1(gb)) { // something to do with DC VLC selection
av_log(avctx, AV_LOG_ERROR, "Unsupported sprite feature\n");
return -1;
}
skip_bits(gb, 3); //slice code
v->res_rtm_flag = 0;
} else {
v->res_rtm_flag = get_bits1(gb); //reserved
}
if (!v->res_rtm_flag)
{
// av_log(avctx, AV_LOG_ERROR,
// "0 for reserved RES_RTM_FLAG is forbidden\n");
av_log(avctx, AV_LOG_ERROR,
"Old WMV3 version detected, some frames may be decoded incorrectly\n");
//return -1;
}
//TODO: figure out what they mean (always 0x402F)
if(!v->res_fasttx) skip_bits(gb, 16);
av_log(avctx, AV_LOG_DEBUG,
"Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
"LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
"Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
"DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
v->dquant, v->quantizer_mode, avctx->max_b_frames
);
return 0;
}
static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
{
v->res_rtm_flag = 1;
v->level = get_bits(gb, 3);
if(v->level >= 5)
{
av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
}
v->chromaformat = get_bits(gb, 2);
if (v->chromaformat != 1)
{
av_log(v->s.avctx, AV_LOG_ERROR,
"Only 4:2:0 chroma format supported\n");
return -1;
}
// (fps-2)/4 (->30)
v->frmrtq_postproc = get_bits(gb, 3); //common
// (bitrate-32kbps)/64kbps
v->bitrtq_postproc = get_bits(gb, 5); //common
v->postprocflag = get_bits1(gb); //common
v->s.avctx->coded_width = (get_bits(gb, 12) + 1) << 1;
v->s.avctx->coded_height = (get_bits(gb, 12) + 1) << 1;
v->s.avctx->width = v->s.avctx->coded_width;
v->s.avctx->height = v->s.avctx->coded_height;
v->broadcast = get_bits1(gb);
v->interlace = get_bits1(gb);
v->tfcntrflag = get_bits1(gb);
v->finterpflag = get_bits1(gb);
skip_bits1(gb); // reserved
v->s.h_edge_pos = v->s.avctx->coded_width;
v->s.v_edge_pos = v->s.avctx->coded_height;
av_log(v->s.avctx, AV_LOG_DEBUG,
"Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
"LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"
"TFCTRflag=%i, FINTERPflag=%i\n",
v->level, v->frmrtq_postproc, v->bitrtq_postproc,
v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,
v->tfcntrflag, v->finterpflag
);
v->psf = get_bits1(gb);
if(v->psf) { //PsF, 6.1.13
av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");
return -1;
}
v->s.max_b_frames = v->s.avctx->max_b_frames = 7;
if(get_bits1(gb)) { //Display Info - decoding is not affected by it
int w, h, ar = 0;
av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");
v->s.avctx->width = w = get_bits(gb, 14) + 1;
v->s.avctx->height = h = get_bits(gb, 14) + 1;
av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);
if(get_bits1(gb))
ar = get_bits(gb, 4);
if(ar && ar < 14){
v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];
}else if(ar == 15){
w = get_bits(gb, 8);
h = get_bits(gb, 8);
v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
}
av_log(v->s.avctx, AV_LOG_DEBUG, "Aspect: %i:%i\n", v->s.avctx->sample_aspect_ratio.num, v->s.avctx->sample_aspect_ratio.den);
if(get_bits1(gb)){ //framerate stuff
if(get_bits1(gb)) {
v->s.avctx->time_base.num = 32;
v->s.avctx->time_base.den = get_bits(gb, 16) + 1;
} else {
int nr, dr;
nr = get_bits(gb, 8);
dr = get_bits(gb, 4);
if(nr && nr < 8 && dr && dr < 3){
v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];
v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;
}
}
}
if(get_bits1(gb)){
v->color_prim = get_bits(gb, 8);
v->transfer_char = get_bits(gb, 8);
v->matrix_coef = get_bits(gb, 8);
}
}
v->hrd_param_flag = get_bits1(gb);
if(v->hrd_param_flag) {
int i;
v->hrd_num_leaky_buckets = get_bits(gb, 5);
skip_bits(gb, 4); //bitrate exponent
skip_bits(gb, 4); //buffer size exponent
for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
skip_bits(gb, 16); //hrd_rate[n]
skip_bits(gb, 16); //hrd_buffer[n]
}
}
return 0;
}
int vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
{
int i;
av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
v->broken_link = get_bits1(gb);
v->closed_entry = get_bits1(gb);
v->panscanflag = get_bits1(gb);
v->refdist_flag = get_bits1(gb);
v->s.loop_filter = get_bits1(gb);
v->fastuvmc = get_bits1(gb);
v->extended_mv = get_bits1(gb);
v->dquant = get_bits(gb, 2);
v->vstransform = get_bits1(gb);
v->overlap = get_bits1(gb);
v->quantizer_mode = get_bits(gb, 2);
if(v->hrd_param_flag){
for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
skip_bits(gb, 8); //hrd_full[n]
}
}
if(get_bits1(gb)){
avctx->coded_width = (get_bits(gb, 12)+1)<<1;
avctx->coded_height = (get_bits(gb, 12)+1)<<1;
}
if(v->extended_mv)
v->extended_dmv = get_bits1(gb);
if((v->range_mapy_flag = get_bits1(gb))) {
av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");
v->range_mapy = get_bits(gb, 3);
}
if((v->range_mapuv_flag = get_bits1(gb))) {
av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");
v->range_mapuv = get_bits(gb, 3);
}
av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"
"BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
"RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
"DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,
v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
return 0;
}
int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
{
int pqindex, lowquant, status;
if(v->finterpflag) v->interpfrm = get_bits1(gb);
skip_bits(gb, 2); //framecnt unused
v->rangeredfrm = 0;
if (v->rangered) v->rangeredfrm = get_bits1(gb);
v->s.pict_type = get_bits1(gb);
if (v->s.avctx->max_b_frames) {
if (!v->s.pict_type) {
if (get_bits1(gb)) v->s.pict_type = AV_PICTURE_TYPE_I;
else v->s.pict_type = AV_PICTURE_TYPE_B;
} else v->s.pict_type = AV_PICTURE_TYPE_P;
} else v->s.pict_type = v->s.pict_type ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
v->bi_type = 0;
if(v->s.pict_type == AV_PICTURE_TYPE_B) {
v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
if(v->bfraction == 0) {
v->s.pict_type = AV_PICTURE_TYPE_BI;
}
}
if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
skip_bits(gb, 7); // skip buffer fullness
if(v->parse_only)
return 0;
/* calculate RND */
if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
v->rnd = 1;
if(v->s.pict_type == AV_PICTURE_TYPE_P)
v->rnd ^= 1;
/* Quantizer stuff */
pqindex = get_bits(gb, 5);
if(!pqindex) return -1;
if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
v->pq = ff_vc1_pquant_table[0][pqindex];
else
v->pq = ff_vc1_pquant_table[1][pqindex];
v->pquantizer = 1;
if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
v->pquantizer = pqindex < 9;
if (v->quantizer_mode == QUANT_NON_UNIFORM)
v->pquantizer = 0;
v->pqindex = pqindex;
if (pqindex < 9) v->halfpq = get_bits1(gb);
else v->halfpq = 0;
if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
v->pquantizer = get_bits1(gb);
v->dquantfrm = 0;
if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3);
v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
v->range_x = 1 << (v->k_x - 1);
v->range_y = 1 << (v->k_y - 1);
if (v->multires && v->s.pict_type != AV_PICTURE_TYPE_B) v->respic = get_bits(gb, 2);
if(v->res_x8 && (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)){
v->x8_type = get_bits1(gb);
}else v->x8_type = 0;
//av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",
// (v->s.pict_type == AV_PICTURE_TYPE_P) ? 'P' : ((v->s.pict_type == AV_PICTURE_TYPE_I) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);
if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P) v->use_ic = 0;
switch(v->s.pict_type) {
case AV_PICTURE_TYPE_P:
if (v->pq < 5) v->tt_index = 0;
else if(v->pq < 13) v->tt_index = 1;
else v->tt_index = 2;
lowquant = (v->pq > 12) ? 0 : 1;
v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
{
int scale, shift, i;
v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
v->lumscale = get_bits(gb, 6);
v->lumshift = get_bits(gb, 6);
v->use_ic = 1;
/* fill lookup tables for intensity compensation */
if(!v->lumscale) {
scale = -64;
shift = (255 - v->lumshift * 2) << 6;
if(v->lumshift > 31)
shift += 128 << 6;
} else {
scale = v->lumscale + 32;
if(v->lumshift > 31)
shift = (v->lumshift - 64) << 6;
else
shift = v->lumshift << 6;
}
for(i = 0; i < 256; i++) {
v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
}
}
if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
v->s.quarter_sample = 0;
else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
v->s.quarter_sample = 0;
else
v->s.quarter_sample = 1;
} else
v->s.quarter_sample = 1;
v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || (v->mv_mode == MV_PMODE_INTENSITY_COMP && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));
if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
v->mv_mode2 == MV_PMODE_MIXED_MV)
|| v->mv_mode == MV_PMODE_MIXED_MV)
{
status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
} else {
v->mv_type_is_raw = 0;
memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
}
status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
/* Hopefully this is correct for P frames */
v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
if (v->dquant)
{
av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
vop_dquant_decoding(v);
}
v->ttfrm = 0; //FIXME Is that so ?
if (v->vstransform)
{
v->ttmbf = get_bits1(gb);
if (v->ttmbf)
{
v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
}
} else {
v->ttmbf = 1;
v->ttfrm = TT_8X8;
}
break;
case AV_PICTURE_TYPE_B:
if (v->pq < 5) v->tt_index = 0;
else if(v->pq < 13) v->tt_index = 1;
else v->tt_index = 2;
v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
v->s.mspel = v->s.quarter_sample;
status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
v->s.mv_table_index = get_bits(gb, 2);
v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
if (v->dquant)
{
av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
vop_dquant_decoding(v);
}
v->ttfrm = 0;
if (v->vstransform)
{
v->ttmbf = get_bits1(gb);
if (v->ttmbf)
{
v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
}
} else {
v->ttmbf = 1;
v->ttfrm = TT_8X8;
}
break;
}
if(!v->x8_type)
{
/* AC Syntax */
v->c_ac_table_index = decode012(gb);
if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
{
v->y_ac_table_index = decode012(gb);
}
/* DC Syntax */
v->s.dc_table_index = get_bits1(gb);
}
if(v->s.pict_type == AV_PICTURE_TYPE_BI) {
v->s.pict_type = AV_PICTURE_TYPE_B;
v->bi_type = 1;
}
return 0;
}
int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
{
int pqindex, lowquant;
int status;
v->p_frame_skipped = 0;
if(v->interlace){
v->fcm = decode012(gb);
if(v->fcm){
if(!v->warn_interlaced++)
av_log(v->s.avctx, AV_LOG_ERROR, "Interlaced frames/fields support is not implemented\n");
return -1;
}
}
switch(get_unary(gb, 0, 4)) {
case 0:
v->s.pict_type = AV_PICTURE_TYPE_P;
break;
case 1:
v->s.pict_type = AV_PICTURE_TYPE_B;
break;
case 2:
v->s.pict_type = AV_PICTURE_TYPE_I;
break;
case 3:
v->s.pict_type = AV_PICTURE_TYPE_BI;
break;
case 4:
v->s.pict_type = AV_PICTURE_TYPE_P; // skipped pic
v->p_frame_skipped = 1;
return 0;
}
if(v->tfcntrflag)
skip_bits(gb, 8);
if(v->broadcast) {
if(!v->interlace || v->psf) {
v->rptfrm = get_bits(gb, 2);
} else {
v->tff = get_bits1(gb);
v->rptfrm = get_bits1(gb);
}
}
if(v->panscanflag) {
av_log_missing_feature(v->s.avctx, "Pan-scan", 0);
//...
}
v->rnd = get_bits1(gb);
if(v->interlace)
v->uvsamp = get_bits1(gb);
if(v->finterpflag) v->interpfrm = get_bits1(gb);
if(v->s.pict_type == AV_PICTURE_TYPE_B) {
v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
if(v->bfraction == 0) {
v->s.pict_type = AV_PICTURE_TYPE_BI; /* XXX: should not happen here */
}
}
pqindex = get_bits(gb, 5);
if(!pqindex) return -1;
v->pqindex = pqindex;
if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
v->pq = ff_vc1_pquant_table[0][pqindex];
else
v->pq = ff_vc1_pquant_table[1][pqindex];
v->pquantizer = 1;
if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
v->pquantizer = pqindex < 9;
if (v->quantizer_mode == QUANT_NON_UNIFORM)
v->pquantizer = 0;
v->pqindex = pqindex;
if (pqindex < 9) v->halfpq = get_bits1(gb);
else v->halfpq = 0;
if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
v->pquantizer = get_bits1(gb);
if(v->postprocflag)
v->postproc = get_bits(gb, 2);
if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P) v->use_ic = 0;
if(v->parse_only)
return 0;
switch(v->s.pict_type) {
case AV_PICTURE_TYPE_I:
case AV_PICTURE_TYPE_BI:
status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
v->condover = CONDOVER_NONE;
if(v->overlap && v->pq <= 8) {
v->condover = decode012(gb);
if(v->condover == CONDOVER_SELECT) {
status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
}
}
break;
case AV_PICTURE_TYPE_P:
if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);
else v->mvrange = 0;
v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
v->range_x = 1 << (v->k_x - 1);
v->range_y = 1 << (v->k_y - 1);
if (v->pq < 5) v->tt_index = 0;
else if(v->pq < 13) v->tt_index = 1;
else v->tt_index = 2;
lowquant = (v->pq > 12) ? 0 : 1;
v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
{
int scale, shift, i;
v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
v->lumscale = get_bits(gb, 6);
v->lumshift = get_bits(gb, 6);
/* fill lookup tables for intensity compensation */
if(!v->lumscale) {
scale = -64;
shift = (255 - v->lumshift * 2) << 6;
if(v->lumshift > 31)
shift += 128 << 6;
} else {
scale = v->lumscale + 32;
if(v->lumshift > 31)
shift = (v->lumshift - 64) << 6;
else
shift = v->lumshift << 6;
}
for(i = 0; i < 256; i++) {
v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
}
v->use_ic = 1;
}
if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
v->s.quarter_sample = 0;
else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
v->s.quarter_sample = 0;
else
v->s.quarter_sample = 1;
} else
v->s.quarter_sample = 1;
v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || (v->mv_mode == MV_PMODE_INTENSITY_COMP && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));
if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
v->mv_mode2 == MV_PMODE_MIXED_MV)
|| v->mv_mode == MV_PMODE_MIXED_MV)
{
status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
} else {
v->mv_type_is_raw = 0;
memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
}
status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
/* Hopefully this is correct for P frames */
v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
if (v->dquant)
{
av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
vop_dquant_decoding(v);
}
v->ttfrm = 0; //FIXME Is that so ?
if (v->vstransform)
{
v->ttmbf = get_bits1(gb);
if (v->ttmbf)
{
v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
}
} else {
v->ttmbf = 1;
v->ttfrm = TT_8X8;
}
break;
case AV_PICTURE_TYPE_B:
if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);
else v->mvrange = 0;
v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
v->range_x = 1 << (v->k_x - 1);
v->range_y = 1 << (v->k_y - 1);
if (v->pq < 5) v->tt_index = 0;
else if(v->pq < 13) v->tt_index = 1;
else v->tt_index = 2;
v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
v->s.mspel = v->s.quarter_sample;
status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
v->s.mv_table_index = get_bits(gb, 2);
v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
if (v->dquant)
{
av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
vop_dquant_decoding(v);
}
v->ttfrm = 0;
if (v->vstransform)
{
v->ttmbf = get_bits1(gb);
if (v->ttmbf)
{
v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
}
} else {
v->ttmbf = 1;
v->ttfrm = TT_8X8;
}
break;
}
/* AC Syntax */
v->c_ac_table_index = decode012(gb);
if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
{
v->y_ac_table_index = decode012(gb);
}
/* DC Syntax */
v->s.dc_table_index = get_bits1(gb);
if ((v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) && v->dquant) {
av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
vop_dquant_decoding(v);
}
v->bi_type = 0;
if(v->s.pict_type == AV_PICTURE_TYPE_BI) {
v->s.pict_type = AV_PICTURE_TYPE_B;
v->bi_type = 1;
}
return 0;
}
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