ffmpeg / libavcodec / msmpeg4.c @ d2940155
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/*
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* MSMPEG4 backend for ffmpeg encoder and decoder
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* Copyright (c) 2001 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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*
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* msmpeg4v1 & v2 stuff by Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* MSMPEG4 backend for ffmpeg encoder and decoder.
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*/
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#include "avcodec.h" |
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#include "dsputil.h" |
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#include "mpegvideo.h" |
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#include "msmpeg4.h" |
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#include "libavutil/x86_cpu.h" |
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#include "h263.h" |
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#include "mpeg4video.h" |
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|
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/*
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* You can also call this codec : MPEG4 with a twist !
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*
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* TODO:
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* - (encoding) select best mv table (two choices)
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* - (encoding) select best vlc/dc table
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*/
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//#define DEBUG
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#define DC_VLC_BITS 9 |
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#define V2_INTRA_CBPC_VLC_BITS 3 |
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#define V2_MB_TYPE_VLC_BITS 7 |
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#define MV_VLC_BITS 9 |
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#define V2_MV_VLC_BITS 9 |
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#define TEX_VLC_BITS 9 |
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|
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#define II_BITRATE 128*1024 |
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#define MBAC_BITRATE 50*1024 |
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|
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#define DEFAULT_INTER_INDEX 3 |
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|
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static uint32_t v2_dc_lum_table[512][2]; |
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static uint32_t v2_dc_chroma_table[512][2]; |
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|
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/* vc1 externs */
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extern const uint8_t wmv3_dc_scale_table[32]; |
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#ifdef DEBUG
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int frame_count = 0; |
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#endif
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#include "msmpeg4data.h" |
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#if CONFIG_ENCODERS //strangely gcc includes this even if it is not referenced |
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static uint8_t rl_length[NB_RL_TABLES][MAX_LEVEL+1][MAX_RUN+1][2]; |
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#endif //CONFIG_ENCODERS |
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|
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static uint8_t static_rl_table_store[NB_RL_TABLES][2][2*MAX_RUN + MAX_LEVEL + 3]; |
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/* This table is practically identical to the one from h263
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* except that it is inverted. */
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static av_cold void init_h263_dc_for_msmpeg4(void) |
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{
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int level, uni_code, uni_len;
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for(level=-256; level<256; level++){ |
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int size, v, l;
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/* find number of bits */
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size = 0;
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v = abs(level); |
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while (v) {
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v >>= 1;
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size++; |
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} |
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|
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if (level < 0) |
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l= (-level) ^ ((1 << size) - 1); |
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else
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l= level; |
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/* luminance h263 */
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uni_code= ff_mpeg4_DCtab_lum[size][0];
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uni_len = ff_mpeg4_DCtab_lum[size][1];
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uni_code ^= (1<<uni_len)-1; //M$ does not like compatibility |
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|
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if (size > 0) { |
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uni_code<<=size; uni_code|=l; |
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uni_len+=size; |
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if (size > 8){ |
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uni_code<<=1; uni_code|=1; |
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uni_len++; |
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} |
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} |
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v2_dc_lum_table[level+256][0]= uni_code; |
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v2_dc_lum_table[level+256][1]= uni_len; |
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/* chrominance h263 */
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uni_code= ff_mpeg4_DCtab_chrom[size][0];
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uni_len = ff_mpeg4_DCtab_chrom[size][1];
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uni_code ^= (1<<uni_len)-1; //M$ does not like compatibility |
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if (size > 0) { |
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uni_code<<=size; uni_code|=l; |
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uni_len+=size; |
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if (size > 8){ |
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uni_code<<=1; uni_code|=1; |
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uni_len++; |
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} |
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} |
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v2_dc_chroma_table[level+256][0]= uni_code; |
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v2_dc_chroma_table[level+256][1]= uni_len; |
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|
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} |
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} |
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static av_cold void common_init(MpegEncContext * s) |
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{
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static int initialized=0; |
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switch(s->msmpeg4_version){
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case 1: |
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case 2: |
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s->y_dc_scale_table= |
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s->c_dc_scale_table= ff_mpeg1_dc_scale_table; |
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break;
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case 3: |
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if(s->workaround_bugs){
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s->y_dc_scale_table= old_ff_y_dc_scale_table; |
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s->c_dc_scale_table= wmv1_c_dc_scale_table; |
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} else{
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s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; |
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s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table; |
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} |
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break;
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case 4: |
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case 5: |
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s->y_dc_scale_table= wmv1_y_dc_scale_table; |
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s->c_dc_scale_table= wmv1_c_dc_scale_table; |
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break;
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#if CONFIG_VC1_DECODER
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case 6: |
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s->y_dc_scale_table= wmv3_dc_scale_table; |
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s->c_dc_scale_table= wmv3_dc_scale_table; |
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break;
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#endif
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} |
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if(s->msmpeg4_version>=4){ |
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ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , wmv1_scantable[1]);
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ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, wmv1_scantable[2]);
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ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, wmv1_scantable[3]);
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ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , wmv1_scantable[0]);
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} |
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//Note the default tables are set in common_init in mpegvideo.c
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if(!initialized){
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initialized=1;
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init_h263_dc_for_msmpeg4(); |
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} |
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} |
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#if CONFIG_ENCODERS
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/* build the table which associate a (x,y) motion vector to a vlc */
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static void init_mv_table(MVTable *tab) |
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{
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int i, x, y;
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tab->table_mv_index = av_malloc(sizeof(uint16_t) * 4096); |
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/* mark all entries as not used */
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for(i=0;i<4096;i++) |
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tab->table_mv_index[i] = tab->n; |
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for(i=0;i<tab->n;i++) { |
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x = tab->table_mvx[i]; |
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y = tab->table_mvy[i]; |
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tab->table_mv_index[(x << 6) | y] = i;
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} |
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} |
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void ff_msmpeg4_code012(PutBitContext *pb, int n) |
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{
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if (n == 0) { |
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put_bits(pb, 1, 0); |
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} else {
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put_bits(pb, 1, 1); |
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put_bits(pb, 1, (n >= 2)); |
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} |
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} |
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static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra){ |
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int size=0; |
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int code;
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int run_diff= intra ? 0 : 1; |
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code = get_rl_index(rl, last, run, level); |
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size+= rl->table_vlc[code][1];
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if (code == rl->n) {
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int level1, run1;
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level1 = level - rl->max_level[last][run]; |
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if (level1 < 1) |
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goto esc2;
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code = get_rl_index(rl, last, run, level1); |
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if (code == rl->n) {
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esc2:
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size++; |
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if (level > MAX_LEVEL)
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goto esc3;
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run1 = run - rl->max_run[last][level] - run_diff; |
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if (run1 < 0) |
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goto esc3;
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code = get_rl_index(rl, last, run1, level); |
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if (code == rl->n) {
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esc3:
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/* third escape */
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size+=1+1+6+8; |
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} else {
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/* second escape */
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size+= 1+1+ rl->table_vlc[code][1]; |
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} |
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} else {
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/* first escape */
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size+= 1+1+ rl->table_vlc[code][1]; |
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} |
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} else {
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size++; |
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} |
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return size;
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} |
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av_cold void ff_msmpeg4_encode_init(MpegEncContext *s)
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{
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static int init_done=0; |
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int i;
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common_init(s); |
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if(s->msmpeg4_version>=4){ |
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s->min_qcoeff= -255;
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s->max_qcoeff= 255;
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} |
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if (!init_done) {
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/* init various encoding tables */
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init_done = 1;
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init_mv_table(&mv_tables[0]);
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init_mv_table(&mv_tables[1]);
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for(i=0;i<NB_RL_TABLES;i++) |
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init_rl(&rl_table[i], static_rl_table_store[i]); |
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for(i=0; i<NB_RL_TABLES; i++){ |
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int level;
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for(level=0; level<=MAX_LEVEL; level++){ |
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int run;
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for(run=0; run<=MAX_RUN; run++){ |
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int last;
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for(last=0; last<2; last++){ |
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rl_length[i][level][run][last]= get_size_of_code(s, &rl_table[ i], last, run, level, 0);
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} |
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} |
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} |
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} |
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} |
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} |
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static void find_best_tables(MpegEncContext * s) |
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{
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int i;
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int best =-1, best_size =9999999; |
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int chroma_best=-1, best_chroma_size=9999999; |
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for(i=0; i<3; i++){ |
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int level;
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int chroma_size=0; |
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int size=0; |
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if(i>0){// ;) |
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size++; |
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chroma_size++; |
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} |
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for(level=0; level<=MAX_LEVEL; level++){ |
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int run;
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for(run=0; run<=MAX_RUN; run++){ |
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int last;
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const int last_size= size + chroma_size; |
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for(last=0; last<2; last++){ |
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int inter_count = s->ac_stats[0][0][level][run][last] + s->ac_stats[0][1][level][run][last]; |
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int intra_luma_count = s->ac_stats[1][0][level][run][last]; |
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int intra_chroma_count= s->ac_stats[1][1][level][run][last]; |
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if(s->pict_type==FF_I_TYPE){
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size += intra_luma_count *rl_length[i ][level][run][last]; |
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chroma_size+= intra_chroma_count*rl_length[i+3][level][run][last];
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}else{
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size+= intra_luma_count *rl_length[i ][level][run][last] |
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+intra_chroma_count*rl_length[i+3][level][run][last]
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+inter_count *rl_length[i+3][level][run][last];
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} |
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} |
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if(last_size == size+chroma_size) break; |
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} |
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} |
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if(size<best_size){
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best_size= size; |
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best= i; |
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} |
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if(chroma_size<best_chroma_size){
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best_chroma_size= chroma_size; |
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chroma_best= i; |
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} |
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} |
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// printf("type:%d, best:%d, qp:%d, var:%d, mcvar:%d, size:%d //\n",
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// s->pict_type, best, s->qscale, s->mb_var_sum, s->mc_mb_var_sum, best_size);
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if(s->pict_type==FF_P_TYPE) chroma_best= best;
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memset(s->ac_stats, 0, sizeof(int)*(MAX_LEVEL+1)*(MAX_RUN+1)*2*2*2); |
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s->rl_table_index = best; |
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s->rl_chroma_table_index= chroma_best; |
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|
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if(s->pict_type != s->last_non_b_pict_type){
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s->rl_table_index= 2;
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if(s->pict_type==FF_I_TYPE)
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s->rl_chroma_table_index= 1;
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else
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s->rl_chroma_table_index= 2;
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} |
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|
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} |
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/* write MSMPEG4 compatible frame header */
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void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number) |
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{
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find_best_tables(s); |
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align_put_bits(&s->pb); |
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put_bits(&s->pb, 2, s->pict_type - 1); |
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put_bits(&s->pb, 5, s->qscale);
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if(s->msmpeg4_version<=2){ |
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s->rl_table_index = 2;
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s->rl_chroma_table_index = 2;
|
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} |
| 366 |
|
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s->dc_table_index = 1;
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s->mv_table_index = 1; /* only if P frame */ |
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s->use_skip_mb_code = 1; /* only if P frame */ |
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s->per_mb_rl_table = 0;
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if(s->msmpeg4_version==4) |
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s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE && s->pict_type==FF_P_TYPE); |
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//printf("%d %d %d %d %d\n", s->pict_type, s->bit_rate, s->inter_intra_pred, s->width, s->height);
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|
| 375 |
if (s->pict_type == FF_I_TYPE) {
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s->slice_height= s->mb_height/1;
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put_bits(&s->pb, 5, 0x16 + s->mb_height/s->slice_height); |
| 378 |
|
| 379 |
if(s->msmpeg4_version==4){ |
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msmpeg4_encode_ext_header(s); |
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if(s->bit_rate>MBAC_BITRATE)
|
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put_bits(&s->pb, 1, s->per_mb_rl_table);
|
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} |
| 384 |
|
| 385 |
if(s->msmpeg4_version>2){ |
| 386 |
if(!s->per_mb_rl_table){
|
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ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index); |
| 388 |
ff_msmpeg4_code012(&s->pb, s->rl_table_index); |
| 389 |
} |
| 390 |
|
| 391 |
put_bits(&s->pb, 1, s->dc_table_index);
|
| 392 |
} |
| 393 |
} else {
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put_bits(&s->pb, 1, s->use_skip_mb_code);
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| 395 |
|
| 396 |
if(s->msmpeg4_version==4 && s->bit_rate>MBAC_BITRATE) |
| 397 |
put_bits(&s->pb, 1, s->per_mb_rl_table);
|
| 398 |
|
| 399 |
if(s->msmpeg4_version>2){ |
| 400 |
if(!s->per_mb_rl_table)
|
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ff_msmpeg4_code012(&s->pb, s->rl_table_index); |
| 402 |
|
| 403 |
put_bits(&s->pb, 1, s->dc_table_index);
|
| 404 |
|
| 405 |
put_bits(&s->pb, 1, s->mv_table_index);
|
| 406 |
} |
| 407 |
} |
| 408 |
|
| 409 |
s->esc3_level_length= 0;
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| 410 |
s->esc3_run_length= 0;
|
| 411 |
} |
| 412 |
|
| 413 |
void msmpeg4_encode_ext_header(MpegEncContext * s)
|
| 414 |
{
|
| 415 |
put_bits(&s->pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29 |
| 416 |
|
| 417 |
put_bits(&s->pb, 11, FFMIN(s->bit_rate/1024, 2047)); |
| 418 |
|
| 419 |
if(s->msmpeg4_version>=3) |
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put_bits(&s->pb, 1, s->flipflop_rounding);
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else
|
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assert(s->flipflop_rounding==0);
|
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} |
| 424 |
|
| 425 |
#endif //CONFIG_ENCODERS |
| 426 |
|
| 427 |
/* predict coded block */
|
| 428 |
int ff_msmpeg4_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr) |
| 429 |
{
|
| 430 |
int xy, wrap, pred, a, b, c;
|
| 431 |
|
| 432 |
xy = s->block_index[n]; |
| 433 |
wrap = s->b8_stride; |
| 434 |
|
| 435 |
/* B C
|
| 436 |
* A X
|
| 437 |
*/
|
| 438 |
a = s->coded_block[xy - 1 ];
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| 439 |
b = s->coded_block[xy - 1 - wrap];
|
| 440 |
c = s->coded_block[xy - wrap]; |
| 441 |
|
| 442 |
if (b == c) {
|
| 443 |
pred = a; |
| 444 |
} else {
|
| 445 |
pred = c; |
| 446 |
} |
| 447 |
|
| 448 |
/* store value */
|
| 449 |
*coded_block_ptr = &s->coded_block[xy]; |
| 450 |
|
| 451 |
return pred;
|
| 452 |
} |
| 453 |
|
| 454 |
#if CONFIG_ENCODERS
|
| 455 |
|
| 456 |
void ff_msmpeg4_encode_motion(MpegEncContext * s,
|
| 457 |
int mx, int my) |
| 458 |
{
|
| 459 |
int code;
|
| 460 |
MVTable *mv; |
| 461 |
|
| 462 |
/* modulo encoding */
|
| 463 |
/* WARNING : you cannot reach all the MVs even with the modulo
|
| 464 |
encoding. This is a somewhat strange compromise they took !!! */
|
| 465 |
if (mx <= -64) |
| 466 |
mx += 64;
|
| 467 |
else if (mx >= 64) |
| 468 |
mx -= 64;
|
| 469 |
if (my <= -64) |
| 470 |
my += 64;
|
| 471 |
else if (my >= 64) |
| 472 |
my -= 64;
|
| 473 |
|
| 474 |
mx += 32;
|
| 475 |
my += 32;
|
| 476 |
#if 0
|
| 477 |
if ((unsigned)mx >= 64 ||
|
| 478 |
(unsigned)my >= 64)
|
| 479 |
av_log(s->avctx, AV_LOG_ERROR, "error mx=%d my=%d\n", mx, my);
|
| 480 |
#endif
|
| 481 |
mv = &mv_tables[s->mv_table_index]; |
| 482 |
|
| 483 |
code = mv->table_mv_index[(mx << 6) | my];
|
| 484 |
put_bits(&s->pb, |
| 485 |
mv->table_mv_bits[code], |
| 486 |
mv->table_mv_code[code]); |
| 487 |
if (code == mv->n) {
|
| 488 |
/* escape : code literally */
|
| 489 |
put_bits(&s->pb, 6, mx);
|
| 490 |
put_bits(&s->pb, 6, my);
|
| 491 |
} |
| 492 |
} |
| 493 |
|
| 494 |
void ff_msmpeg4_handle_slices(MpegEncContext *s){
|
| 495 |
if (s->mb_x == 0) { |
| 496 |
if (s->slice_height && (s->mb_y % s->slice_height) == 0) { |
| 497 |
if(s->msmpeg4_version < 4){ |
| 498 |
ff_mpeg4_clean_buffers(s); |
| 499 |
} |
| 500 |
s->first_slice_line = 1;
|
| 501 |
} else {
|
| 502 |
s->first_slice_line = 0;
|
| 503 |
} |
| 504 |
} |
| 505 |
} |
| 506 |
|
| 507 |
static void msmpeg4v2_encode_motion(MpegEncContext * s, int val) |
| 508 |
{
|
| 509 |
int range, bit_size, sign, code, bits;
|
| 510 |
|
| 511 |
if (val == 0) { |
| 512 |
/* zero vector */
|
| 513 |
code = 0;
|
| 514 |
put_bits(&s->pb, mvtab[code][1], mvtab[code][0]); |
| 515 |
} else {
|
| 516 |
bit_size = s->f_code - 1;
|
| 517 |
range = 1 << bit_size;
|
| 518 |
if (val <= -64) |
| 519 |
val += 64;
|
| 520 |
else if (val >= 64) |
| 521 |
val -= 64;
|
| 522 |
|
| 523 |
if (val >= 0) { |
| 524 |
sign = 0;
|
| 525 |
} else {
|
| 526 |
val = -val; |
| 527 |
sign = 1;
|
| 528 |
} |
| 529 |
val--; |
| 530 |
code = (val >> bit_size) + 1;
|
| 531 |
bits = val & (range - 1);
|
| 532 |
|
| 533 |
put_bits(&s->pb, mvtab[code][1] + 1, (mvtab[code][0] << 1) | sign); |
| 534 |
if (bit_size > 0) { |
| 535 |
put_bits(&s->pb, bit_size, bits); |
| 536 |
} |
| 537 |
} |
| 538 |
} |
| 539 |
|
| 540 |
void msmpeg4_encode_mb(MpegEncContext * s,
|
| 541 |
DCTELEM block[6][64], |
| 542 |
int motion_x, int motion_y) |
| 543 |
{
|
| 544 |
int cbp, coded_cbp, i;
|
| 545 |
int pred_x, pred_y;
|
| 546 |
uint8_t *coded_block; |
| 547 |
|
| 548 |
ff_msmpeg4_handle_slices(s); |
| 549 |
|
| 550 |
if (!s->mb_intra) {
|
| 551 |
/* compute cbp */
|
| 552 |
cbp = 0;
|
| 553 |
for (i = 0; i < 6; i++) { |
| 554 |
if (s->block_last_index[i] >= 0) |
| 555 |
cbp |= 1 << (5 - i); |
| 556 |
} |
| 557 |
if (s->use_skip_mb_code && (cbp | motion_x | motion_y) == 0) { |
| 558 |
/* skip macroblock */
|
| 559 |
put_bits(&s->pb, 1, 1); |
| 560 |
s->last_bits++; |
| 561 |
s->misc_bits++; |
| 562 |
s->skip_count++; |
| 563 |
|
| 564 |
return;
|
| 565 |
} |
| 566 |
if (s->use_skip_mb_code)
|
| 567 |
put_bits(&s->pb, 1, 0); /* mb coded */ |
| 568 |
|
| 569 |
if(s->msmpeg4_version<=2){ |
| 570 |
put_bits(&s->pb, |
| 571 |
v2_mb_type[cbp&3][1], |
| 572 |
v2_mb_type[cbp&3][0]); |
| 573 |
if((cbp&3) != 3) coded_cbp= cbp ^ 0x3C; |
| 574 |
else coded_cbp= cbp;
|
| 575 |
|
| 576 |
put_bits(&s->pb, |
| 577 |
ff_h263_cbpy_tab[coded_cbp>>2][1], |
| 578 |
ff_h263_cbpy_tab[coded_cbp>>2][0]); |
| 579 |
|
| 580 |
s->misc_bits += get_bits_diff(s); |
| 581 |
|
| 582 |
h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
| 583 |
msmpeg4v2_encode_motion(s, motion_x - pred_x); |
| 584 |
msmpeg4v2_encode_motion(s, motion_y - pred_y); |
| 585 |
}else{
|
| 586 |
put_bits(&s->pb, |
| 587 |
table_mb_non_intra[cbp + 64][1], |
| 588 |
table_mb_non_intra[cbp + 64][0]); |
| 589 |
|
| 590 |
s->misc_bits += get_bits_diff(s); |
| 591 |
|
| 592 |
/* motion vector */
|
| 593 |
h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
| 594 |
ff_msmpeg4_encode_motion(s, motion_x - pred_x, |
| 595 |
motion_y - pred_y); |
| 596 |
} |
| 597 |
|
| 598 |
s->mv_bits += get_bits_diff(s); |
| 599 |
|
| 600 |
for (i = 0; i < 6; i++) { |
| 601 |
ff_msmpeg4_encode_block(s, block[i], i); |
| 602 |
} |
| 603 |
s->p_tex_bits += get_bits_diff(s); |
| 604 |
} else {
|
| 605 |
/* compute cbp */
|
| 606 |
cbp = 0;
|
| 607 |
coded_cbp = 0;
|
| 608 |
for (i = 0; i < 6; i++) { |
| 609 |
int val, pred;
|
| 610 |
val = (s->block_last_index[i] >= 1);
|
| 611 |
cbp |= val << (5 - i);
|
| 612 |
if (i < 4) { |
| 613 |
/* predict value for close blocks only for luma */
|
| 614 |
pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block); |
| 615 |
*coded_block = val; |
| 616 |
val = val ^ pred; |
| 617 |
} |
| 618 |
coded_cbp |= val << (5 - i);
|
| 619 |
} |
| 620 |
#if 0
|
| 621 |
if (coded_cbp)
|
| 622 |
printf("cbp=%x %x\n", cbp, coded_cbp);
|
| 623 |
#endif
|
| 624 |
|
| 625 |
if(s->msmpeg4_version<=2){ |
| 626 |
if (s->pict_type == FF_I_TYPE) {
|
| 627 |
put_bits(&s->pb, |
| 628 |
v2_intra_cbpc[cbp&3][1], v2_intra_cbpc[cbp&3][0]); |
| 629 |
} else {
|
| 630 |
if (s->use_skip_mb_code)
|
| 631 |
put_bits(&s->pb, 1, 0); /* mb coded */ |
| 632 |
put_bits(&s->pb, |
| 633 |
v2_mb_type[(cbp&3) + 4][1], |
| 634 |
v2_mb_type[(cbp&3) + 4][0]); |
| 635 |
} |
| 636 |
put_bits(&s->pb, 1, 0); /* no AC prediction yet */ |
| 637 |
put_bits(&s->pb, |
| 638 |
ff_h263_cbpy_tab[cbp>>2][1], |
| 639 |
ff_h263_cbpy_tab[cbp>>2][0]); |
| 640 |
}else{
|
| 641 |
if (s->pict_type == FF_I_TYPE) {
|
| 642 |
put_bits(&s->pb, |
| 643 |
ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]); |
| 644 |
} else {
|
| 645 |
if (s->use_skip_mb_code)
|
| 646 |
put_bits(&s->pb, 1, 0); /* mb coded */ |
| 647 |
put_bits(&s->pb, |
| 648 |
table_mb_non_intra[cbp][1],
|
| 649 |
table_mb_non_intra[cbp][0]);
|
| 650 |
} |
| 651 |
put_bits(&s->pb, 1, 0); /* no AC prediction yet */ |
| 652 |
if(s->inter_intra_pred){
|
| 653 |
s->h263_aic_dir=0;
|
| 654 |
put_bits(&s->pb, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]); |
| 655 |
} |
| 656 |
} |
| 657 |
s->misc_bits += get_bits_diff(s); |
| 658 |
|
| 659 |
for (i = 0; i < 6; i++) { |
| 660 |
ff_msmpeg4_encode_block(s, block[i], i); |
| 661 |
} |
| 662 |
s->i_tex_bits += get_bits_diff(s); |
| 663 |
s->i_count++; |
| 664 |
} |
| 665 |
} |
| 666 |
|
| 667 |
#endif //CONFIG_ENCODERS |
| 668 |
|
| 669 |
static inline int msmpeg4v1_pred_dc(MpegEncContext * s, int n, |
| 670 |
int32_t **dc_val_ptr) |
| 671 |
{
|
| 672 |
int i;
|
| 673 |
|
| 674 |
if (n < 4) { |
| 675 |
i= 0;
|
| 676 |
} else {
|
| 677 |
i= n-3;
|
| 678 |
} |
| 679 |
|
| 680 |
*dc_val_ptr= &s->last_dc[i]; |
| 681 |
return s->last_dc[i];
|
| 682 |
} |
| 683 |
|
| 684 |
static int get_dc(uint8_t *src, int stride, int scale) |
| 685 |
{
|
| 686 |
int y;
|
| 687 |
int sum=0; |
| 688 |
for(y=0; y<8; y++){ |
| 689 |
int x;
|
| 690 |
for(x=0; x<8; x++){ |
| 691 |
sum+=src[x + y*stride]; |
| 692 |
} |
| 693 |
} |
| 694 |
return FASTDIV((sum + (scale>>1)), scale); |
| 695 |
} |
| 696 |
|
| 697 |
/* dir = 0: left, dir = 1: top prediction */
|
| 698 |
static inline int msmpeg4_pred_dc(MpegEncContext * s, int n, |
| 699 |
int16_t **dc_val_ptr, int *dir_ptr)
|
| 700 |
{
|
| 701 |
int a, b, c, wrap, pred, scale;
|
| 702 |
int16_t *dc_val; |
| 703 |
|
| 704 |
/* find prediction */
|
| 705 |
if (n < 4) { |
| 706 |
scale = s->y_dc_scale; |
| 707 |
} else {
|
| 708 |
scale = s->c_dc_scale; |
| 709 |
} |
| 710 |
|
| 711 |
wrap = s->block_wrap[n]; |
| 712 |
dc_val= s->dc_val[0] + s->block_index[n];
|
| 713 |
|
| 714 |
/* B C
|
| 715 |
* A X
|
| 716 |
*/
|
| 717 |
a = dc_val[ - 1];
|
| 718 |
b = dc_val[ - 1 - wrap];
|
| 719 |
c = dc_val[ - wrap]; |
| 720 |
|
| 721 |
if(s->first_slice_line && (n&2)==0 && s->msmpeg4_version<4){ |
| 722 |
b=c=1024;
|
| 723 |
} |
| 724 |
|
| 725 |
/* XXX: the following solution consumes divisions, but it does not
|
| 726 |
necessitate to modify mpegvideo.c. The problem comes from the
|
| 727 |
fact they decided to store the quantized DC (which would lead
|
| 728 |
to problems if Q could vary !) */
|
| 729 |
#if ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE
|
| 730 |
__asm__ volatile(
|
| 731 |
"movl %3, %%eax \n\t"
|
| 732 |
"shrl $1, %%eax \n\t"
|
| 733 |
"addl %%eax, %2 \n\t"
|
| 734 |
"addl %%eax, %1 \n\t"
|
| 735 |
"addl %0, %%eax \n\t"
|
| 736 |
"mull %4 \n\t"
|
| 737 |
"movl %%edx, %0 \n\t"
|
| 738 |
"movl %1, %%eax \n\t"
|
| 739 |
"mull %4 \n\t"
|
| 740 |
"movl %%edx, %1 \n\t"
|
| 741 |
"movl %2, %%eax \n\t"
|
| 742 |
"mull %4 \n\t"
|
| 743 |
"movl %%edx, %2 \n\t"
|
| 744 |
: "+b" (a), "+c" (b), "+D" (c) |
| 745 |
: "g" (scale), "S" (ff_inverse[scale]) |
| 746 |
: "%eax", "%edx" |
| 747 |
); |
| 748 |
#else
|
| 749 |
/* #elif ARCH_ALPHA */
|
| 750 |
/* Divisions are extremely costly on Alpha; optimize the most
|
| 751 |
common case. But they are costly everywhere...
|
| 752 |
*/
|
| 753 |
if (scale == 8) { |
| 754 |
a = (a + (8 >> 1)) / 8; |
| 755 |
b = (b + (8 >> 1)) / 8; |
| 756 |
c = (c + (8 >> 1)) / 8; |
| 757 |
} else {
|
| 758 |
a = FASTDIV((a + (scale >> 1)), scale);
|
| 759 |
b = FASTDIV((b + (scale >> 1)), scale);
|
| 760 |
c = FASTDIV((c + (scale >> 1)), scale);
|
| 761 |
} |
| 762 |
#endif
|
| 763 |
/* XXX: WARNING: they did not choose the same test as MPEG4. This
|
| 764 |
is very important ! */
|
| 765 |
if(s->msmpeg4_version>3){ |
| 766 |
if(s->inter_intra_pred){
|
| 767 |
uint8_t *dest; |
| 768 |
int wrap;
|
| 769 |
|
| 770 |
if(n==1){ |
| 771 |
pred=a; |
| 772 |
*dir_ptr = 0;
|
| 773 |
}else if(n==2){ |
| 774 |
pred=c; |
| 775 |
*dir_ptr = 1;
|
| 776 |
}else if(n==3){ |
| 777 |
if (abs(a - b) < abs(b - c)) {
|
| 778 |
pred = c; |
| 779 |
*dir_ptr = 1;
|
| 780 |
} else {
|
| 781 |
pred = a; |
| 782 |
*dir_ptr = 0;
|
| 783 |
} |
| 784 |
}else{
|
| 785 |
if(n<4){ |
| 786 |
wrap= s->linesize; |
| 787 |
dest= s->current_picture.data[0] + (((n>>1) + 2*s->mb_y) * 8* wrap ) + ((n&1) + 2*s->mb_x) * 8; |
| 788 |
}else{
|
| 789 |
wrap= s->uvlinesize; |
| 790 |
dest= s->current_picture.data[n-3] + (s->mb_y * 8 * wrap) + s->mb_x * 8; |
| 791 |
} |
| 792 |
if(s->mb_x==0) a= (1024 + (scale>>1))/scale; |
| 793 |
else a= get_dc(dest-8, wrap, scale*8); |
| 794 |
if(s->mb_y==0) c= (1024 + (scale>>1))/scale; |
| 795 |
else c= get_dc(dest-8*wrap, wrap, scale*8); |
| 796 |
|
| 797 |
if (s->h263_aic_dir==0) { |
| 798 |
pred= a; |
| 799 |
*dir_ptr = 0;
|
| 800 |
}else if (s->h263_aic_dir==1) { |
| 801 |
if(n==0){ |
| 802 |
pred= c; |
| 803 |
*dir_ptr = 1;
|
| 804 |
}else{
|
| 805 |
pred= a; |
| 806 |
*dir_ptr = 0;
|
| 807 |
} |
| 808 |
}else if (s->h263_aic_dir==2) { |
| 809 |
if(n==0){ |
| 810 |
pred= a; |
| 811 |
*dir_ptr = 0;
|
| 812 |
}else{
|
| 813 |
pred= c; |
| 814 |
*dir_ptr = 1;
|
| 815 |
} |
| 816 |
} else {
|
| 817 |
pred= c; |
| 818 |
*dir_ptr = 1;
|
| 819 |
} |
| 820 |
} |
| 821 |
}else{
|
| 822 |
if (abs(a - b) < abs(b - c)) {
|
| 823 |
pred = c; |
| 824 |
*dir_ptr = 1;
|
| 825 |
} else {
|
| 826 |
pred = a; |
| 827 |
*dir_ptr = 0;
|
| 828 |
} |
| 829 |
} |
| 830 |
}else{
|
| 831 |
if (abs(a - b) <= abs(b - c)) {
|
| 832 |
pred = c; |
| 833 |
*dir_ptr = 1;
|
| 834 |
} else {
|
| 835 |
pred = a; |
| 836 |
*dir_ptr = 0;
|
| 837 |
} |
| 838 |
} |
| 839 |
|
| 840 |
/* update predictor */
|
| 841 |
*dc_val_ptr = &dc_val[0];
|
| 842 |
return pred;
|
| 843 |
} |
| 844 |
|
| 845 |
#define DC_MAX 119 |
| 846 |
|
| 847 |
static void msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr) |
| 848 |
{
|
| 849 |
int sign, code;
|
| 850 |
int pred, extquant;
|
| 851 |
int extrabits = 0; |
| 852 |
|
| 853 |
if(s->msmpeg4_version==1){ |
| 854 |
int32_t *dc_val; |
| 855 |
pred = msmpeg4v1_pred_dc(s, n, &dc_val); |
| 856 |
|
| 857 |
/* update predictor */
|
| 858 |
*dc_val= level; |
| 859 |
}else{
|
| 860 |
int16_t *dc_val; |
| 861 |
pred = msmpeg4_pred_dc(s, n, &dc_val, dir_ptr); |
| 862 |
|
| 863 |
/* update predictor */
|
| 864 |
if (n < 4) { |
| 865 |
*dc_val = level * s->y_dc_scale; |
| 866 |
} else {
|
| 867 |
*dc_val = level * s->c_dc_scale; |
| 868 |
} |
| 869 |
} |
| 870 |
|
| 871 |
/* do the prediction */
|
| 872 |
level -= pred; |
| 873 |
|
| 874 |
if(s->msmpeg4_version<=2){ |
| 875 |
if (n < 4) { |
| 876 |
put_bits(&s->pb, |
| 877 |
v2_dc_lum_table[level+256][1], |
| 878 |
v2_dc_lum_table[level+256][0]); |
| 879 |
}else{
|
| 880 |
put_bits(&s->pb, |
| 881 |
v2_dc_chroma_table[level+256][1], |
| 882 |
v2_dc_chroma_table[level+256][0]); |
| 883 |
} |
| 884 |
}else{
|
| 885 |
sign = 0;
|
| 886 |
if (level < 0) { |
| 887 |
level = -level; |
| 888 |
sign = 1;
|
| 889 |
} |
| 890 |
code = level; |
| 891 |
if (code > DC_MAX)
|
| 892 |
code = DC_MAX; |
| 893 |
else if( s->msmpeg4_version>=6 ) { |
| 894 |
if( s->qscale == 1 ) { |
| 895 |
extquant = (level + 3) & 0x3; |
| 896 |
code = ((level+3)>>2); |
| 897 |
} else if( s->qscale == 2 ) { |
| 898 |
extquant = (level + 1) & 0x1; |
| 899 |
code = ((level+1)>>1); |
| 900 |
} |
| 901 |
} |
| 902 |
|
| 903 |
if (s->dc_table_index == 0) { |
| 904 |
if (n < 4) { |
| 905 |
put_bits(&s->pb, ff_table0_dc_lum[code][1], ff_table0_dc_lum[code][0]); |
| 906 |
} else {
|
| 907 |
put_bits(&s->pb, ff_table0_dc_chroma[code][1], ff_table0_dc_chroma[code][0]); |
| 908 |
} |
| 909 |
} else {
|
| 910 |
if (n < 4) { |
| 911 |
put_bits(&s->pb, ff_table1_dc_lum[code][1], ff_table1_dc_lum[code][0]); |
| 912 |
} else {
|
| 913 |
put_bits(&s->pb, ff_table1_dc_chroma[code][1], ff_table1_dc_chroma[code][0]); |
| 914 |
} |
| 915 |
} |
| 916 |
|
| 917 |
if(s->msmpeg4_version>=6 && s->qscale<=2) |
| 918 |
extrabits = 3 - s->qscale;
|
| 919 |
|
| 920 |
if (code == DC_MAX)
|
| 921 |
put_bits(&s->pb, 8 + extrabits, level);
|
| 922 |
else if(extrabits > 0)//== VC1 && s->qscale<=2 |
| 923 |
put_bits(&s->pb, extrabits, extquant); |
| 924 |
|
| 925 |
if (level != 0) { |
| 926 |
put_bits(&s->pb, 1, sign);
|
| 927 |
} |
| 928 |
} |
| 929 |
} |
| 930 |
|
| 931 |
/* Encoding of a block. Very similar to MPEG4 except for a different
|
| 932 |
escape coding (same as H263) and more vlc tables.
|
| 933 |
*/
|
| 934 |
void ff_msmpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n) |
| 935 |
{
|
| 936 |
int level, run, last, i, j, last_index;
|
| 937 |
int last_non_zero, sign, slevel;
|
| 938 |
int code, run_diff, dc_pred_dir;
|
| 939 |
const RLTable *rl;
|
| 940 |
const uint8_t *scantable;
|
| 941 |
|
| 942 |
if (s->mb_intra) {
|
| 943 |
msmpeg4_encode_dc(s, block[0], n, &dc_pred_dir);
|
| 944 |
i = 1;
|
| 945 |
if (n < 4) { |
| 946 |
rl = &rl_table[s->rl_table_index]; |
| 947 |
} else {
|
| 948 |
rl = &rl_table[3 + s->rl_chroma_table_index];
|
| 949 |
} |
| 950 |
run_diff = s->msmpeg4_version>=4;
|
| 951 |
scantable= s->intra_scantable.permutated; |
| 952 |
} else {
|
| 953 |
i = 0;
|
| 954 |
rl = &rl_table[3 + s->rl_table_index];
|
| 955 |
if(s->msmpeg4_version<=2) |
| 956 |
run_diff = 0;
|
| 957 |
else
|
| 958 |
run_diff = 1;
|
| 959 |
scantable= s->inter_scantable.permutated; |
| 960 |
} |
| 961 |
|
| 962 |
/* recalculate block_last_index for M$ wmv1 */
|
| 963 |
if(s->msmpeg4_version>=4 && s->msmpeg4_version<6 && s->block_last_index[n]>0){ |
| 964 |
for(last_index=63; last_index>=0; last_index--){ |
| 965 |
if(block[scantable[last_index]]) break; |
| 966 |
} |
| 967 |
s->block_last_index[n]= last_index; |
| 968 |
}else
|
| 969 |
last_index = s->block_last_index[n]; |
| 970 |
/* AC coefs */
|
| 971 |
last_non_zero = i - 1;
|
| 972 |
for (; i <= last_index; i++) {
|
| 973 |
j = scantable[i]; |
| 974 |
level = block[j]; |
| 975 |
if (level) {
|
| 976 |
run = i - last_non_zero - 1;
|
| 977 |
last = (i == last_index); |
| 978 |
sign = 0;
|
| 979 |
slevel = level; |
| 980 |
if (level < 0) { |
| 981 |
sign = 1;
|
| 982 |
level = -level; |
| 983 |
} |
| 984 |
|
| 985 |
if(level<=MAX_LEVEL && run<=MAX_RUN){
|
| 986 |
s->ac_stats[s->mb_intra][n>3][level][run][last]++;
|
| 987 |
} |
| 988 |
#if 0
|
| 989 |
else
|
| 990 |
s->ac_stats[s->mb_intra][n>3][40][63][0]++; //esc3 like
|
| 991 |
#endif
|
| 992 |
code = get_rl_index(rl, last, run, level); |
| 993 |
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); |
| 994 |
if (code == rl->n) {
|
| 995 |
int level1, run1;
|
| 996 |
|
| 997 |
level1 = level - rl->max_level[last][run]; |
| 998 |
if (level1 < 1) |
| 999 |
goto esc2;
|
| 1000 |
code = get_rl_index(rl, last, run, level1); |
| 1001 |
if (code == rl->n) {
|
| 1002 |
esc2:
|
| 1003 |
put_bits(&s->pb, 1, 0); |
| 1004 |
if (level > MAX_LEVEL)
|
| 1005 |
goto esc3;
|
| 1006 |
run1 = run - rl->max_run[last][level] - run_diff; |
| 1007 |
if (run1 < 0) |
| 1008 |
goto esc3;
|
| 1009 |
code = get_rl_index(rl, last, run1+1, level);
|
| 1010 |
if (s->msmpeg4_version == 4 && code == rl->n) |
| 1011 |
goto esc3;
|
| 1012 |
code = get_rl_index(rl, last, run1, level); |
| 1013 |
if (code == rl->n) {
|
| 1014 |
esc3:
|
| 1015 |
/* third escape */
|
| 1016 |
put_bits(&s->pb, 1, 0); |
| 1017 |
put_bits(&s->pb, 1, last);
|
| 1018 |
if(s->msmpeg4_version>=4){ |
| 1019 |
if(s->esc3_level_length==0){ |
| 1020 |
s->esc3_level_length=8;
|
| 1021 |
s->esc3_run_length= 6;
|
| 1022 |
//ESCLVLSZ + ESCRUNSZ
|
| 1023 |
if(s->qscale<8) |
| 1024 |
put_bits(&s->pb, 6 + (s->msmpeg4_version>=6), 3); |
| 1025 |
else
|
| 1026 |
put_bits(&s->pb, 8, 3); |
| 1027 |
} |
| 1028 |
put_bits(&s->pb, s->esc3_run_length, run); |
| 1029 |
put_bits(&s->pb, 1, sign);
|
| 1030 |
put_bits(&s->pb, s->esc3_level_length, level); |
| 1031 |
}else{
|
| 1032 |
put_bits(&s->pb, 6, run);
|
| 1033 |
put_sbits(&s->pb, 8, slevel);
|
| 1034 |
} |
| 1035 |
} else {
|
| 1036 |
/* second escape */
|
| 1037 |
put_bits(&s->pb, 1, 1); |
| 1038 |
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); |
| 1039 |
put_bits(&s->pb, 1, sign);
|
| 1040 |
} |
| 1041 |
} else {
|
| 1042 |
/* first escape */
|
| 1043 |
put_bits(&s->pb, 1, 1); |
| 1044 |
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); |
| 1045 |
put_bits(&s->pb, 1, sign);
|
| 1046 |
} |
| 1047 |
} else {
|
| 1048 |
put_bits(&s->pb, 1, sign);
|
| 1049 |
} |
| 1050 |
last_non_zero = i; |
| 1051 |
} |
| 1052 |
} |
| 1053 |
} |
| 1054 |
|
| 1055 |
/****************************************/
|
| 1056 |
/* decoding stuff */
|
| 1057 |
|
| 1058 |
VLC ff_mb_non_intra_vlc[4];
|
| 1059 |
static VLC v2_dc_lum_vlc;
|
| 1060 |
static VLC v2_dc_chroma_vlc;
|
| 1061 |
static VLC v2_intra_cbpc_vlc;
|
| 1062 |
static VLC v2_mb_type_vlc;
|
| 1063 |
static VLC v2_mv_vlc;
|
| 1064 |
VLC ff_inter_intra_vlc; |
| 1065 |
|
| 1066 |
/* This is identical to h263 except that its range is multiplied by 2. */
|
| 1067 |
static int msmpeg4v2_decode_motion(MpegEncContext * s, int pred, int f_code) |
| 1068 |
{
|
| 1069 |
int code, val, sign, shift;
|
| 1070 |
|
| 1071 |
code = get_vlc2(&s->gb, v2_mv_vlc.table, V2_MV_VLC_BITS, 2);
|
| 1072 |
// printf("MV code %d at %d %d pred: %d\n", code, s->mb_x,s->mb_y, pred);
|
| 1073 |
if (code < 0) |
| 1074 |
return 0xffff; |
| 1075 |
|
| 1076 |
if (code == 0) |
| 1077 |
return pred;
|
| 1078 |
sign = get_bits1(&s->gb); |
| 1079 |
shift = f_code - 1;
|
| 1080 |
val = code; |
| 1081 |
if (shift) {
|
| 1082 |
val = (val - 1) << shift;
|
| 1083 |
val |= get_bits(&s->gb, shift); |
| 1084 |
val++; |
| 1085 |
} |
| 1086 |
if (sign)
|
| 1087 |
val = -val; |
| 1088 |
|
| 1089 |
val += pred; |
| 1090 |
if (val <= -64) |
| 1091 |
val += 64;
|
| 1092 |
else if (val >= 64) |
| 1093 |
val -= 64;
|
| 1094 |
|
| 1095 |
return val;
|
| 1096 |
} |
| 1097 |
|
| 1098 |
static int msmpeg4v12_decode_mb(MpegEncContext *s, DCTELEM block[6][64]) |
| 1099 |
{
|
| 1100 |
int cbp, code, i;
|
| 1101 |
|
| 1102 |
if (s->pict_type == FF_P_TYPE) {
|
| 1103 |
if (s->use_skip_mb_code) {
|
| 1104 |
if (get_bits1(&s->gb)) {
|
| 1105 |
/* skip mb */
|
| 1106 |
s->mb_intra = 0;
|
| 1107 |
for(i=0;i<6;i++) |
| 1108 |
s->block_last_index[i] = -1;
|
| 1109 |
s->mv_dir = MV_DIR_FORWARD; |
| 1110 |
s->mv_type = MV_TYPE_16X16; |
| 1111 |
s->mv[0][0][0] = 0; |
| 1112 |
s->mv[0][0][1] = 0; |
| 1113 |
s->mb_skipped = 1;
|
| 1114 |
return 0; |
| 1115 |
} |
| 1116 |
} |
| 1117 |
|
| 1118 |
if(s->msmpeg4_version==2) |
| 1119 |
code = get_vlc2(&s->gb, v2_mb_type_vlc.table, V2_MB_TYPE_VLC_BITS, 1);
|
| 1120 |
else
|
| 1121 |
code = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
|
| 1122 |
if(code<0 || code>7){ |
| 1123 |
av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", code, s->mb_x, s->mb_y);
|
| 1124 |
return -1; |
| 1125 |
} |
| 1126 |
|
| 1127 |
s->mb_intra = code >>2;
|
| 1128 |
|
| 1129 |
cbp = code & 0x3;
|
| 1130 |
} else {
|
| 1131 |
s->mb_intra = 1;
|
| 1132 |
if(s->msmpeg4_version==2) |
| 1133 |
cbp= get_vlc2(&s->gb, v2_intra_cbpc_vlc.table, V2_INTRA_CBPC_VLC_BITS, 1);
|
| 1134 |
else
|
| 1135 |
cbp= get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 1);
|
| 1136 |
if(cbp<0 || cbp>3){ |
| 1137 |
av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y);
|
| 1138 |
return -1; |
| 1139 |
} |
| 1140 |
} |
| 1141 |
|
| 1142 |
if (!s->mb_intra) {
|
| 1143 |
int mx, my, cbpy;
|
| 1144 |
|
| 1145 |
cbpy= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
|
| 1146 |
if(cbpy<0){ |
| 1147 |
av_log(s->avctx, AV_LOG_ERROR, "cbpy %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y);
|
| 1148 |
return -1; |
| 1149 |
} |
| 1150 |
|
| 1151 |
cbp|= cbpy<<2;
|
| 1152 |
if(s->msmpeg4_version==1 || (cbp&3) != 3) cbp^= 0x3C; |
| 1153 |
|
| 1154 |
h263_pred_motion(s, 0, 0, &mx, &my); |
| 1155 |
mx= msmpeg4v2_decode_motion(s, mx, 1);
|
| 1156 |
my= msmpeg4v2_decode_motion(s, my, 1);
|
| 1157 |
|
| 1158 |
s->mv_dir = MV_DIR_FORWARD; |
| 1159 |
s->mv_type = MV_TYPE_16X16; |
| 1160 |
s->mv[0][0][0] = mx; |
| 1161 |
s->mv[0][0][1] = my; |
| 1162 |
} else {
|
| 1163 |
if(s->msmpeg4_version==2){ |
| 1164 |
s->ac_pred = get_bits1(&s->gb); |
| 1165 |
cbp|= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors |
| 1166 |
} else{
|
| 1167 |
s->ac_pred = 0;
|
| 1168 |
cbp|= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors |
| 1169 |
if(s->pict_type==FF_P_TYPE) cbp^=0x3C; |
| 1170 |
} |
| 1171 |
} |
| 1172 |
|
| 1173 |
s->dsp.clear_blocks(s->block[0]);
|
| 1174 |
for (i = 0; i < 6; i++) { |
| 1175 |
if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) |
| 1176 |
{
|
| 1177 |
av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
|
| 1178 |
return -1; |
| 1179 |
} |
| 1180 |
} |
| 1181 |
return 0; |
| 1182 |
} |
| 1183 |
|
| 1184 |
static int msmpeg4v34_decode_mb(MpegEncContext *s, DCTELEM block[6][64]) |
| 1185 |
{
|
| 1186 |
int cbp, code, i;
|
| 1187 |
uint8_t *coded_val; |
| 1188 |
uint32_t * const mb_type_ptr= &s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ];
|
| 1189 |
|
| 1190 |
if (s->pict_type == FF_P_TYPE) {
|
| 1191 |
if (s->use_skip_mb_code) {
|
| 1192 |
if (get_bits1(&s->gb)) {
|
| 1193 |
/* skip mb */
|
| 1194 |
s->mb_intra = 0;
|
| 1195 |
for(i=0;i<6;i++) |
| 1196 |
s->block_last_index[i] = -1;
|
| 1197 |
s->mv_dir = MV_DIR_FORWARD; |
| 1198 |
s->mv_type = MV_TYPE_16X16; |
| 1199 |
s->mv[0][0][0] = 0; |
| 1200 |
s->mv[0][0][1] = 0; |
| 1201 |
s->mb_skipped = 1;
|
| 1202 |
*mb_type_ptr = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; |
| 1203 |
|
| 1204 |
return 0; |
| 1205 |
} |
| 1206 |
} |
| 1207 |
|
| 1208 |
code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[DEFAULT_INTER_INDEX].table, MB_NON_INTRA_VLC_BITS, 3);
|
| 1209 |
if (code < 0) |
| 1210 |
return -1; |
| 1211 |
//s->mb_intra = (code & 0x40) ? 0 : 1;
|
| 1212 |
s->mb_intra = (~code & 0x40) >> 6; |
| 1213 |
|
| 1214 |
cbp = code & 0x3f;
|
| 1215 |
} else {
|
| 1216 |
s->mb_intra = 1;
|
| 1217 |
code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
|
| 1218 |
if (code < 0) |
| 1219 |
return -1; |
| 1220 |
/* predict coded block pattern */
|
| 1221 |
cbp = 0;
|
| 1222 |
for(i=0;i<6;i++) { |
| 1223 |
int val = ((code >> (5 - i)) & 1); |
| 1224 |
if (i < 4) { |
| 1225 |
int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
|
| 1226 |
val = val ^ pred; |
| 1227 |
*coded_val = val; |
| 1228 |
} |
| 1229 |
cbp |= val << (5 - i);
|
| 1230 |
} |
| 1231 |
} |
| 1232 |
|
| 1233 |
if (!s->mb_intra) {
|
| 1234 |
int mx, my;
|
| 1235 |
//printf("P at %d %d\n", s->mb_x, s->mb_y);
|
| 1236 |
if(s->per_mb_rl_table && cbp){
|
| 1237 |
s->rl_table_index = decode012(&s->gb); |
| 1238 |
s->rl_chroma_table_index = s->rl_table_index; |
| 1239 |
} |
| 1240 |
h263_pred_motion(s, 0, 0, &mx, &my); |
| 1241 |
if (ff_msmpeg4_decode_motion(s, &mx, &my) < 0) |
| 1242 |
return -1; |
| 1243 |
s->mv_dir = MV_DIR_FORWARD; |
| 1244 |
s->mv_type = MV_TYPE_16X16; |
| 1245 |
s->mv[0][0][0] = mx; |
| 1246 |
s->mv[0][0][1] = my; |
| 1247 |
*mb_type_ptr = MB_TYPE_L0 | MB_TYPE_16x16; |
| 1248 |
} else {
|
| 1249 |
//printf("I at %d %d %d %06X\n", s->mb_x, s->mb_y, ((cbp&3)? 1 : 0) +((cbp&0x3C)? 2 : 0), show_bits(&s->gb, 24));
|
| 1250 |
s->ac_pred = get_bits1(&s->gb); |
| 1251 |
*mb_type_ptr = MB_TYPE_INTRA; |
| 1252 |
if(s->inter_intra_pred){
|
| 1253 |
s->h263_aic_dir= get_vlc2(&s->gb, ff_inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
|
| 1254 |
// printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
|
| 1255 |
} |
| 1256 |
if(s->per_mb_rl_table && cbp){
|
| 1257 |
s->rl_table_index = decode012(&s->gb); |
| 1258 |
s->rl_chroma_table_index = s->rl_table_index; |
| 1259 |
} |
| 1260 |
} |
| 1261 |
|
| 1262 |
s->dsp.clear_blocks(s->block[0]);
|
| 1263 |
for (i = 0; i < 6; i++) { |
| 1264 |
if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) |
| 1265 |
{
|
| 1266 |
av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
|
| 1267 |
return -1; |
| 1268 |
} |
| 1269 |
} |
| 1270 |
|
| 1271 |
return 0; |
| 1272 |
} |
| 1273 |
|
| 1274 |
/* init all vlc decoding tables */
|
| 1275 |
av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx)
|
| 1276 |
{
|
| 1277 |
MpegEncContext *s = avctx->priv_data; |
| 1278 |
static int done = 0; |
| 1279 |
int i;
|
| 1280 |
MVTable *mv; |
| 1281 |
|
| 1282 |
if (ff_h263_decode_init(avctx) < 0) |
| 1283 |
return -1; |
| 1284 |
|
| 1285 |
common_init(s); |
| 1286 |
|
| 1287 |
if (!done) {
|
| 1288 |
done = 1;
|
| 1289 |
|
| 1290 |
for(i=0;i<NB_RL_TABLES;i++) { |
| 1291 |
init_rl(&rl_table[i], static_rl_table_store[i]); |
| 1292 |
} |
| 1293 |
INIT_VLC_RL(rl_table[0], 642); |
| 1294 |
INIT_VLC_RL(rl_table[1], 1104); |
| 1295 |
INIT_VLC_RL(rl_table[2], 554); |
| 1296 |
INIT_VLC_RL(rl_table[3], 940); |
| 1297 |
INIT_VLC_RL(rl_table[4], 962); |
| 1298 |
INIT_VLC_RL(rl_table[5], 554); |
| 1299 |
|
| 1300 |
mv = &mv_tables[0];
|
| 1301 |
INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, mv->n + 1,
|
| 1302 |
mv->table_mv_bits, 1, 1, |
| 1303 |
mv->table_mv_code, 2, 2, 3714); |
| 1304 |
mv = &mv_tables[1];
|
| 1305 |
INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, mv->n + 1,
|
| 1306 |
mv->table_mv_bits, 1, 1, |
| 1307 |
mv->table_mv_code, 2, 2, 2694); |
| 1308 |
|
| 1309 |
INIT_VLC_STATIC(&ff_msmp4_dc_luma_vlc[0], DC_VLC_BITS, 120, |
| 1310 |
&ff_table0_dc_lum[0][1], 8, 4, |
| 1311 |
&ff_table0_dc_lum[0][0], 8, 4, 1158); |
| 1312 |
INIT_VLC_STATIC(&ff_msmp4_dc_chroma_vlc[0], DC_VLC_BITS, 120, |
| 1313 |
&ff_table0_dc_chroma[0][1], 8, 4, |
| 1314 |
&ff_table0_dc_chroma[0][0], 8, 4, 1118); |
| 1315 |
INIT_VLC_STATIC(&ff_msmp4_dc_luma_vlc[1], DC_VLC_BITS, 120, |
| 1316 |
&ff_table1_dc_lum[0][1], 8, 4, |
| 1317 |
&ff_table1_dc_lum[0][0], 8, 4, 1476); |
| 1318 |
INIT_VLC_STATIC(&ff_msmp4_dc_chroma_vlc[1], DC_VLC_BITS, 120, |
| 1319 |
&ff_table1_dc_chroma[0][1], 8, 4, |
| 1320 |
&ff_table1_dc_chroma[0][0], 8, 4, 1216); |
| 1321 |
|
| 1322 |
INIT_VLC_STATIC(&v2_dc_lum_vlc, DC_VLC_BITS, 512,
|
| 1323 |
&v2_dc_lum_table[0][1], 8, 4, |
| 1324 |
&v2_dc_lum_table[0][0], 8, 4, 1472); |
| 1325 |
INIT_VLC_STATIC(&v2_dc_chroma_vlc, DC_VLC_BITS, 512,
|
| 1326 |
&v2_dc_chroma_table[0][1], 8, 4, |
| 1327 |
&v2_dc_chroma_table[0][0], 8, 4, 1506); |
| 1328 |
|
| 1329 |
INIT_VLC_STATIC(&v2_intra_cbpc_vlc, V2_INTRA_CBPC_VLC_BITS, 4,
|
| 1330 |
&v2_intra_cbpc[0][1], 2, 1, |
| 1331 |
&v2_intra_cbpc[0][0], 2, 1, 8); |
| 1332 |
INIT_VLC_STATIC(&v2_mb_type_vlc, V2_MB_TYPE_VLC_BITS, 8,
|
| 1333 |
&v2_mb_type[0][1], 2, 1, |
| 1334 |
&v2_mb_type[0][0], 2, 1, 128); |
| 1335 |
INIT_VLC_STATIC(&v2_mv_vlc, V2_MV_VLC_BITS, 33,
|
| 1336 |
&mvtab[0][1], 2, 1, |
| 1337 |
&mvtab[0][0], 2, 1, 538); |
| 1338 |
|
| 1339 |
INIT_VLC_STATIC(&ff_mb_non_intra_vlc[0], MB_NON_INTRA_VLC_BITS, 128, |
| 1340 |
&wmv2_inter_table[0][0][1], 8, 4, |
| 1341 |
&wmv2_inter_table[0][0][0], 8, 4, 1636); |
| 1342 |
INIT_VLC_STATIC(&ff_mb_non_intra_vlc[1], MB_NON_INTRA_VLC_BITS, 128, |
| 1343 |
&wmv2_inter_table[1][0][1], 8, 4, |
| 1344 |
&wmv2_inter_table[1][0][0], 8, 4, 2648); |
| 1345 |
INIT_VLC_STATIC(&ff_mb_non_intra_vlc[2], MB_NON_INTRA_VLC_BITS, 128, |
| 1346 |
&wmv2_inter_table[2][0][1], 8, 4, |
| 1347 |
&wmv2_inter_table[2][0][0], 8, 4, 1532); |
| 1348 |
INIT_VLC_STATIC(&ff_mb_non_intra_vlc[3], MB_NON_INTRA_VLC_BITS, 128, |
| 1349 |
&wmv2_inter_table[3][0][1], 8, 4, |
| 1350 |
&wmv2_inter_table[3][0][0], 8, 4, 2488); |
| 1351 |
|
| 1352 |
INIT_VLC_STATIC(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,
|
| 1353 |
&ff_msmp4_mb_i_table[0][1], 4, 2, |
| 1354 |
&ff_msmp4_mb_i_table[0][0], 4, 2, 536); |
| 1355 |
|
| 1356 |
INIT_VLC_STATIC(&ff_inter_intra_vlc, INTER_INTRA_VLC_BITS, 4,
|
| 1357 |
&table_inter_intra[0][1], 2, 1, |
| 1358 |
&table_inter_intra[0][0], 2, 1, 8); |
| 1359 |
} |
| 1360 |
|
| 1361 |
switch(s->msmpeg4_version){
|
| 1362 |
case 1: |
| 1363 |
case 2: |
| 1364 |
s->decode_mb= msmpeg4v12_decode_mb; |
| 1365 |
break;
|
| 1366 |
case 3: |
| 1367 |
case 4: |
| 1368 |
s->decode_mb= msmpeg4v34_decode_mb; |
| 1369 |
break;
|
| 1370 |
case 5: |
| 1371 |
if (CONFIG_WMV2_DECODER)
|
| 1372 |
s->decode_mb= ff_wmv2_decode_mb; |
| 1373 |
case 6: |
| 1374 |
//FIXME + TODO VC1 decode mb
|
| 1375 |
break;
|
| 1376 |
} |
| 1377 |
|
| 1378 |
s->slice_height= s->mb_height; //to avoid 1/0 if the first frame is not a keyframe
|
| 1379 |
|
| 1380 |
return 0; |
| 1381 |
} |
| 1382 |
|
| 1383 |
int msmpeg4_decode_picture_header(MpegEncContext * s)
|
| 1384 |
{
|
| 1385 |
int code;
|
| 1386 |
|
| 1387 |
#if 0
|
| 1388 |
{
|
| 1389 |
int i;
|
| 1390 |
for(i=0; i<s->gb.size_in_bits; i++)
|
| 1391 |
av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
|
| 1392 |
// get_bits1(&s->gb);
|
| 1393 |
av_log(s->avctx, AV_LOG_DEBUG, "END\n");
|
| 1394 |
return -1;
|
| 1395 |
}
|
| 1396 |
#endif
|
| 1397 |
|
| 1398 |
if(s->msmpeg4_version==1){ |
| 1399 |
int start_code = get_bits_long(&s->gb, 32); |
| 1400 |
if(start_code!=0x00000100){ |
| 1401 |
av_log(s->avctx, AV_LOG_ERROR, "invalid startcode\n");
|
| 1402 |
return -1; |
| 1403 |
} |
| 1404 |
|
| 1405 |
skip_bits(&s->gb, 5); // frame number */ |
| 1406 |
} |
| 1407 |
|
| 1408 |
s->pict_type = get_bits(&s->gb, 2) + 1; |
| 1409 |
if (s->pict_type != FF_I_TYPE &&
|
| 1410 |
s->pict_type != FF_P_TYPE){
|
| 1411 |
av_log(s->avctx, AV_LOG_ERROR, "invalid picture type\n");
|
| 1412 |
return -1; |
| 1413 |
} |
| 1414 |
#if 0
|
| 1415 |
{
|
| 1416 |
static int had_i=0;
|
| 1417 |
if(s->pict_type == FF_I_TYPE) had_i=1;
|
| 1418 |
if(!had_i) return -1;
|
| 1419 |
}
|
| 1420 |
#endif
|
| 1421 |
s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
|
| 1422 |
if(s->qscale==0){ |
| 1423 |
av_log(s->avctx, AV_LOG_ERROR, "invalid qscale\n");
|
| 1424 |
return -1; |
| 1425 |
} |
| 1426 |
|
| 1427 |
if (s->pict_type == FF_I_TYPE) {
|
| 1428 |
code = get_bits(&s->gb, 5);
|
| 1429 |
if(s->msmpeg4_version==1){ |
| 1430 |
if(code==0 || code>s->mb_height){ |
| 1431 |
av_log(s->avctx, AV_LOG_ERROR, "invalid slice height %d\n", code);
|
| 1432 |
return -1; |
| 1433 |
} |
| 1434 |
|
| 1435 |
s->slice_height = code; |
| 1436 |
}else{
|
| 1437 |
/* 0x17: one slice, 0x18: two slices, ... */
|
| 1438 |
if (code < 0x17){ |
| 1439 |
av_log(s->avctx, AV_LOG_ERROR, "error, slice code was %X\n", code);
|
| 1440 |
return -1; |
| 1441 |
} |
| 1442 |
|
| 1443 |
s->slice_height = s->mb_height / (code - 0x16);
|
| 1444 |
} |
| 1445 |
|
| 1446 |
switch(s->msmpeg4_version){
|
| 1447 |
case 1: |
| 1448 |
case 2: |
| 1449 |
s->rl_chroma_table_index = 2;
|
| 1450 |
s->rl_table_index = 2;
|
| 1451 |
|
| 1452 |
s->dc_table_index = 0; //not used |
| 1453 |
break;
|
| 1454 |
case 3: |
| 1455 |
s->rl_chroma_table_index = decode012(&s->gb); |
| 1456 |
s->rl_table_index = decode012(&s->gb); |
| 1457 |
|
| 1458 |
s->dc_table_index = get_bits1(&s->gb); |
| 1459 |
break;
|
| 1460 |
case 4: |
| 1461 |
msmpeg4_decode_ext_header(s, (2+5+5+17+7)/8); |
| 1462 |
|
| 1463 |
if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb);
|
| 1464 |
else s->per_mb_rl_table= 0; |
| 1465 |
|
| 1466 |
if(!s->per_mb_rl_table){
|
| 1467 |
s->rl_chroma_table_index = decode012(&s->gb); |
| 1468 |
s->rl_table_index = decode012(&s->gb); |
| 1469 |
} |
| 1470 |
|
| 1471 |
s->dc_table_index = get_bits1(&s->gb); |
| 1472 |
s->inter_intra_pred= 0;
|
| 1473 |
break;
|
| 1474 |
} |
| 1475 |
s->no_rounding = 1;
|
| 1476 |
if(s->avctx->debug&FF_DEBUG_PICT_INFO)
|
| 1477 |
av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d slice:%d \n",
|
| 1478 |
s->qscale, |
| 1479 |
s->rl_chroma_table_index, |
| 1480 |
s->rl_table_index, |
| 1481 |
s->dc_table_index, |
| 1482 |
s->per_mb_rl_table, |
| 1483 |
s->slice_height); |
| 1484 |
} else {
|
| 1485 |
switch(s->msmpeg4_version){
|
| 1486 |
case 1: |
| 1487 |
case 2: |
| 1488 |
if(s->msmpeg4_version==1) |
| 1489 |
s->use_skip_mb_code = 1;
|
| 1490 |
else
|
| 1491 |
s->use_skip_mb_code = get_bits1(&s->gb); |
| 1492 |
s->rl_table_index = 2;
|
| 1493 |
s->rl_chroma_table_index = s->rl_table_index; |
| 1494 |
s->dc_table_index = 0; //not used |
| 1495 |
s->mv_table_index = 0;
|
| 1496 |
break;
|
| 1497 |
case 3: |
| 1498 |
s->use_skip_mb_code = get_bits1(&s->gb); |
| 1499 |
s->rl_table_index = decode012(&s->gb); |
| 1500 |
s->rl_chroma_table_index = s->rl_table_index; |
| 1501 |
|
| 1502 |
s->dc_table_index = get_bits1(&s->gb); |
| 1503 |
|
| 1504 |
s->mv_table_index = get_bits1(&s->gb); |
| 1505 |
break;
|
| 1506 |
case 4: |
| 1507 |
s->use_skip_mb_code = get_bits1(&s->gb); |
| 1508 |
|
| 1509 |
if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb);
|
| 1510 |
else s->per_mb_rl_table= 0; |
| 1511 |
|
| 1512 |
if(!s->per_mb_rl_table){
|
| 1513 |
s->rl_table_index = decode012(&s->gb); |
| 1514 |
s->rl_chroma_table_index = s->rl_table_index; |
| 1515 |
} |
| 1516 |
|
| 1517 |
s->dc_table_index = get_bits1(&s->gb); |
| 1518 |
|
| 1519 |
s->mv_table_index = get_bits1(&s->gb); |
| 1520 |
s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE); |
| 1521 |
break;
|
| 1522 |
} |
| 1523 |
|
| 1524 |
if(s->avctx->debug&FF_DEBUG_PICT_INFO)
|
| 1525 |
av_log(s->avctx, AV_LOG_DEBUG, "skip:%d rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d \n",
|
| 1526 |
s->use_skip_mb_code, |
| 1527 |
s->rl_table_index, |
| 1528 |
s->rl_chroma_table_index, |
| 1529 |
s->dc_table_index, |
| 1530 |
s->mv_table_index, |
| 1531 |
s->per_mb_rl_table, |
| 1532 |
s->qscale); |
| 1533 |
|
| 1534 |
if(s->flipflop_rounding){
|
| 1535 |
s->no_rounding ^= 1;
|
| 1536 |
}else{
|
| 1537 |
s->no_rounding = 0;
|
| 1538 |
} |
| 1539 |
} |
| 1540 |
//printf("%d %d %d %d %d\n", s->pict_type, s->bit_rate, s->inter_intra_pred, s->width, s->height);
|
| 1541 |
|
| 1542 |
s->esc3_level_length= 0;
|
| 1543 |
s->esc3_run_length= 0;
|
| 1544 |
|
| 1545 |
return 0; |
| 1546 |
} |
| 1547 |
|
| 1548 |
int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size) |
| 1549 |
{
|
| 1550 |
int left= buf_size*8 - get_bits_count(&s->gb); |
| 1551 |
int length= s->msmpeg4_version>=3 ? 17 : 16; |
| 1552 |
/* the alt_bitstream reader could read over the end so we need to check it */
|
| 1553 |
if(left>=length && left<length+8) |
| 1554 |
{
|
| 1555 |
int fps;
|
| 1556 |
|
| 1557 |
fps= get_bits(&s->gb, 5);
|
| 1558 |
s->bit_rate= get_bits(&s->gb, 11)*1024; |
| 1559 |
if(s->msmpeg4_version>=3) |
| 1560 |
s->flipflop_rounding= get_bits1(&s->gb); |
| 1561 |
else
|
| 1562 |
s->flipflop_rounding= 0;
|
| 1563 |
|
| 1564 |
// printf("fps:%2d bps:%2d roundingType:%1d\n", fps, s->bit_rate/1024, s->flipflop_rounding);
|
| 1565 |
} |
| 1566 |
else if(left<length+8) |
| 1567 |
{
|
| 1568 |
s->flipflop_rounding= 0;
|
| 1569 |
if(s->msmpeg4_version != 2) |
| 1570 |
av_log(s->avctx, AV_LOG_ERROR, "ext header missing, %d left\n", left);
|
| 1571 |
} |
| 1572 |
else
|
| 1573 |
{
|
| 1574 |
av_log(s->avctx, AV_LOG_ERROR, "I frame too long, ignoring ext header\n");
|
| 1575 |
} |
| 1576 |
|
| 1577 |
return 0; |
| 1578 |
} |
| 1579 |
|
| 1580 |
static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) |
| 1581 |
{
|
| 1582 |
int level, pred;
|
| 1583 |
|
| 1584 |
if(s->msmpeg4_version<=2){ |
| 1585 |
if (n < 4) { |
| 1586 |
level = get_vlc2(&s->gb, v2_dc_lum_vlc.table, DC_VLC_BITS, 3);
|
| 1587 |
} else {
|
| 1588 |
level = get_vlc2(&s->gb, v2_dc_chroma_vlc.table, DC_VLC_BITS, 3);
|
| 1589 |
} |
| 1590 |
if (level < 0) |
| 1591 |
return -1; |
| 1592 |
level-=256;
|
| 1593 |
}else{ //FIXME optimize use unified tables & index |
| 1594 |
if (n < 4) { |
| 1595 |
level = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
|
| 1596 |
} else {
|
| 1597 |
level = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
|
| 1598 |
} |
| 1599 |
if (level < 0){ |
| 1600 |
av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n");
|
| 1601 |
return -1; |
| 1602 |
} |
| 1603 |
|
| 1604 |
if (level == DC_MAX) {
|
| 1605 |
level = get_bits(&s->gb, 8);
|
| 1606 |
if (get_bits1(&s->gb))
|
| 1607 |
level = -level; |
| 1608 |
} else if (level != 0) { |
| 1609 |
if (get_bits1(&s->gb))
|
| 1610 |
level = -level; |
| 1611 |
} |
| 1612 |
} |
| 1613 |
|
| 1614 |
if(s->msmpeg4_version==1){ |
| 1615 |
int32_t *dc_val; |
| 1616 |
pred = msmpeg4v1_pred_dc(s, n, &dc_val); |
| 1617 |
level += pred; |
| 1618 |
|
| 1619 |
/* update predictor */
|
| 1620 |
*dc_val= level; |
| 1621 |
}else{
|
| 1622 |
int16_t *dc_val; |
| 1623 |
pred = msmpeg4_pred_dc(s, n, &dc_val, dir_ptr); |
| 1624 |
level += pred; |
| 1625 |
|
| 1626 |
/* update predictor */
|
| 1627 |
if (n < 4) { |
| 1628 |
*dc_val = level * s->y_dc_scale; |
| 1629 |
} else {
|
| 1630 |
*dc_val = level * s->c_dc_scale; |
| 1631 |
} |
| 1632 |
} |
| 1633 |
|
| 1634 |
return level;
|
| 1635 |
} |
| 1636 |
|
| 1637 |
//#define ERROR_DETAILS
|
| 1638 |
int ff_msmpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
|
| 1639 |
int n, int coded, const uint8_t *scan_table) |
| 1640 |
{
|
| 1641 |
int level, i, last, run, run_diff;
|
| 1642 |
int av_uninit(dc_pred_dir);
|
| 1643 |
RLTable *rl; |
| 1644 |
RL_VLC_ELEM *rl_vlc; |
| 1645 |
int qmul, qadd;
|
| 1646 |
|
| 1647 |
if (s->mb_intra) {
|
| 1648 |
qmul=1;
|
| 1649 |
qadd=0;
|
| 1650 |
|
| 1651 |
/* DC coef */
|
| 1652 |
level = msmpeg4_decode_dc(s, n, &dc_pred_dir); |
| 1653 |
|
| 1654 |
if (level < 0){ |
| 1655 |
av_log(s->avctx, AV_LOG_ERROR, "dc overflow- block: %d qscale: %d//\n", n, s->qscale);
|
| 1656 |
if(s->inter_intra_pred) level=0; |
| 1657 |
else return -1; |
| 1658 |
} |
| 1659 |
if (n < 4) { |
| 1660 |
rl = &rl_table[s->rl_table_index]; |
| 1661 |
if(level > 256*s->y_dc_scale){ |
| 1662 |
av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ L qscale: %d//\n", s->qscale);
|
| 1663 |
if(!s->inter_intra_pred) return -1; |
| 1664 |
} |
| 1665 |
} else {
|
| 1666 |
rl = &rl_table[3 + s->rl_chroma_table_index];
|
| 1667 |
if(level > 256*s->c_dc_scale){ |
| 1668 |
av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ C qscale: %d//\n", s->qscale);
|
| 1669 |
if(!s->inter_intra_pred) return -1; |
| 1670 |
} |
| 1671 |
} |
| 1672 |
block[0] = level;
|
| 1673 |
|
| 1674 |
run_diff = s->msmpeg4_version >= 4;
|
| 1675 |
i = 0;
|
| 1676 |
if (!coded) {
|
| 1677 |
goto not_coded;
|
| 1678 |
} |
| 1679 |
if (s->ac_pred) {
|
| 1680 |
if (dc_pred_dir == 0) |
| 1681 |
scan_table = s->intra_v_scantable.permutated; /* left */
|
| 1682 |
else
|
| 1683 |
scan_table = s->intra_h_scantable.permutated; /* top */
|
| 1684 |
} else {
|
| 1685 |
scan_table = s->intra_scantable.permutated; |
| 1686 |
} |
| 1687 |
rl_vlc= rl->rl_vlc[0];
|
| 1688 |
} else {
|
| 1689 |
qmul = s->qscale << 1;
|
| 1690 |
qadd = (s->qscale - 1) | 1; |
| 1691 |
i = -1;
|
| 1692 |
rl = &rl_table[3 + s->rl_table_index];
|
| 1693 |
|
| 1694 |
if(s->msmpeg4_version==2) |
| 1695 |
run_diff = 0;
|
| 1696 |
else
|
| 1697 |
run_diff = 1;
|
| 1698 |
|
| 1699 |
if (!coded) {
|
| 1700 |
s->block_last_index[n] = i; |
| 1701 |
return 0; |
| 1702 |
} |
| 1703 |
if(!scan_table)
|
| 1704 |
scan_table = s->inter_scantable.permutated; |
| 1705 |
rl_vlc= rl->rl_vlc[s->qscale]; |
| 1706 |
} |
| 1707 |
{
|
| 1708 |
OPEN_READER(re, &s->gb); |
| 1709 |
for(;;) {
|
| 1710 |
UPDATE_CACHE(re, &s->gb); |
| 1711 |
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0); |
| 1712 |
if (level==0) { |
| 1713 |
int cache;
|
| 1714 |
cache= GET_CACHE(re, &s->gb); |
| 1715 |
/* escape */
|
| 1716 |
if (s->msmpeg4_version==1 || (cache&0x80000000)==0) { |
| 1717 |
if (s->msmpeg4_version==1 || (cache&0x40000000)==0) { |
| 1718 |
/* third escape */
|
| 1719 |
if(s->msmpeg4_version!=1) LAST_SKIP_BITS(re, &s->gb, 2); |
| 1720 |
UPDATE_CACHE(re, &s->gb); |
| 1721 |
if(s->msmpeg4_version<=3){ |
| 1722 |
last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); |
| 1723 |
run= SHOW_UBITS(re, &s->gb, 6); SKIP_CACHE(re, &s->gb, 6); |
| 1724 |
level= SHOW_SBITS(re, &s->gb, 8); LAST_SKIP_CACHE(re, &s->gb, 8); |
| 1725 |
SKIP_COUNTER(re, &s->gb, 1+6+8); |
| 1726 |
}else{
|
| 1727 |
int sign;
|
| 1728 |
last= SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1); |
| 1729 |
if(!s->esc3_level_length){
|
| 1730 |
int ll;
|
| 1731 |
//printf("ESC-3 %X at %d %d\n", show_bits(&s->gb, 24), s->mb_x, s->mb_y);
|
| 1732 |
if(s->qscale<8){ |
| 1733 |
ll= SHOW_UBITS(re, &s->gb, 3); SKIP_BITS(re, &s->gb, 3); |
| 1734 |
if(ll==0){ |
| 1735 |
ll= 8+SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1); |
| 1736 |
} |
| 1737 |
}else{
|
| 1738 |
ll=2;
|
| 1739 |
while(ll<8 && SHOW_UBITS(re, &s->gb, 1)==0){ |
| 1740 |
ll++; |
| 1741 |
SKIP_BITS(re, &s->gb, 1);
|
| 1742 |
} |
| 1743 |
if(ll<8) SKIP_BITS(re, &s->gb, 1); |
| 1744 |
} |
| 1745 |
|
| 1746 |
s->esc3_level_length= ll; |
| 1747 |
s->esc3_run_length= SHOW_UBITS(re, &s->gb, 2) + 3; SKIP_BITS(re, &s->gb, 2); |
| 1748 |
//printf("level length:%d, run length: %d\n", ll, s->esc3_run_length);
|
| 1749 |
UPDATE_CACHE(re, &s->gb); |
| 1750 |
} |
| 1751 |
run= SHOW_UBITS(re, &s->gb, s->esc3_run_length); |
| 1752 |
SKIP_BITS(re, &s->gb, s->esc3_run_length); |
| 1753 |
|
| 1754 |
sign= SHOW_UBITS(re, &s->gb, 1);
|
| 1755 |
SKIP_BITS(re, &s->gb, 1);
|
| 1756 |
|
| 1757 |
level= SHOW_UBITS(re, &s->gb, s->esc3_level_length); |
| 1758 |
SKIP_BITS(re, &s->gb, s->esc3_level_length); |
| 1759 |
if(sign) level= -level;
|
| 1760 |
} |
| 1761 |
//printf("level: %d, run: %d at %d %d\n", level, run, s->mb_x, s->mb_y);
|
| 1762 |
#if 0 // waste of time / this will detect very few errors
|
| 1763 |
{
|
| 1764 |
const int abs_level= FFABS(level);
|
| 1765 |
const int run1= run - rl->max_run[last][abs_level] - run_diff;
|
| 1766 |
if(abs_level<=MAX_LEVEL && run<=MAX_RUN){
|
| 1767 |
if(abs_level <= rl->max_level[last][run]){
|
| 1768 |
av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n");
|
| 1769 |
return DECODING_AC_LOST;
|
| 1770 |
}
|
| 1771 |
if(abs_level <= rl->max_level[last][run]*2){
|
| 1772 |
av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n");
|
| 1773 |
return DECODING_AC_LOST;
|
| 1774 |
}
|
| 1775 |
if(run1>=0 && abs_level <= rl->max_level[last][run1]){
|
| 1776 |
av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n");
|
| 1777 |
return DECODING_AC_LOST;
|
| 1778 |
}
|
| 1779 |
}
|
| 1780 |
}
|
| 1781 |
#endif
|
| 1782 |
//level = level * qmul + (level>0) * qadd - (level<=0) * qadd ;
|
| 1783 |
if (level>0) level= level * qmul + qadd; |
| 1784 |
else level= level * qmul - qadd;
|
| 1785 |
#if 0 // waste of time too :(
|
| 1786 |
if(level>2048 || level<-2048){
|
| 1787 |
av_log(s->avctx, AV_LOG_ERROR, "|level| overflow in 3. esc\n");
|
| 1788 |
return DECODING_AC_LOST;
|
| 1789 |
}
|
| 1790 |
#endif
|
| 1791 |
i+= run + 1;
|
| 1792 |
if(last) i+=192; |
| 1793 |
#ifdef ERROR_DETAILS
|
| 1794 |
if(run==66) |
| 1795 |
av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC3 level=%d\n", level);
|
| 1796 |
else if((i>62 && i<192) || i>192+63) |
| 1797 |
av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC3 i=%d run=%d level=%d\n", i, run, level);
|
| 1798 |
#endif
|
| 1799 |
} else {
|
| 1800 |
/* second escape */
|
| 1801 |
SKIP_BITS(re, &s->gb, 2);
|
| 1802 |
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); |
| 1803 |
i+= run + rl->max_run[run>>7][level/qmul] + run_diff; //FIXME opt indexing |
| 1804 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| 1805 |
LAST_SKIP_BITS(re, &s->gb, 1);
|
| 1806 |
#ifdef ERROR_DETAILS
|
| 1807 |
if(run==66) |
| 1808 |
av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC2 level=%d\n", level);
|
| 1809 |
else if((i>62 && i<192) || i>192+63) |
| 1810 |
av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC2 i=%d run=%d level=%d\n", i, run, level);
|
| 1811 |
#endif
|
| 1812 |
} |
| 1813 |
} else {
|
| 1814 |
/* first escape */
|
| 1815 |
SKIP_BITS(re, &s->gb, 1);
|
| 1816 |
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); |
| 1817 |
i+= run; |
| 1818 |
level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing |
| 1819 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| 1820 |
LAST_SKIP_BITS(re, &s->gb, 1);
|
| 1821 |
#ifdef ERROR_DETAILS
|
| 1822 |
if(run==66) |
| 1823 |
av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC1 level=%d\n", level);
|
| 1824 |
else if((i>62 && i<192) || i>192+63) |
| 1825 |
av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC1 i=%d run=%d level=%d\n", i, run, level);
|
| 1826 |
#endif
|
| 1827 |
} |
| 1828 |
} else {
|
| 1829 |
i+= run; |
| 1830 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| 1831 |
LAST_SKIP_BITS(re, &s->gb, 1);
|
| 1832 |
#ifdef ERROR_DETAILS
|
| 1833 |
if(run==66) |
| 1834 |
av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code level=%d\n", level);
|
| 1835 |
else if((i>62 && i<192) || i>192+63) |
| 1836 |
av_log(s->avctx, AV_LOG_ERROR, "run overflow i=%d run=%d level=%d\n", i, run, level);
|
| 1837 |
#endif
|
| 1838 |
} |
| 1839 |
if (i > 62){ |
| 1840 |
i-= 192;
|
| 1841 |
if(i&(~63)){ |
| 1842 |
const int left= get_bits_left(&s->gb); |
| 1843 |
if(((i+192 == 64 && level/qmul==-1) || s->error_recognition<=1) && left>=0){ |
| 1844 |
av_log(s->avctx, AV_LOG_ERROR, "ignoring overflow at %d %d\n", s->mb_x, s->mb_y);
|
| 1845 |
break;
|
| 1846 |
}else{
|
| 1847 |
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
|
| 1848 |
return -1; |
| 1849 |
} |
| 1850 |
} |
| 1851 |
|
| 1852 |
block[scan_table[i]] = level; |
| 1853 |
break;
|
| 1854 |
} |
| 1855 |
|
| 1856 |
block[scan_table[i]] = level; |
| 1857 |
} |
| 1858 |
CLOSE_READER(re, &s->gb); |
| 1859 |
} |
| 1860 |
not_coded:
|
| 1861 |
if (s->mb_intra) {
|
| 1862 |
mpeg4_pred_ac(s, block, n, dc_pred_dir); |
| 1863 |
if (s->ac_pred) {
|
| 1864 |
i = 63; /* XXX: not optimal */ |
| 1865 |
} |
| 1866 |
} |
| 1867 |
if(s->msmpeg4_version>=4 && i>0) i=63; //FIXME/XXX optimize |
| 1868 |
s->block_last_index[n] = i; |
| 1869 |
|
| 1870 |
return 0; |
| 1871 |
} |
| 1872 |
|
| 1873 |
int ff_msmpeg4_decode_motion(MpegEncContext * s,
|
| 1874 |
int *mx_ptr, int *my_ptr) |
| 1875 |
{
|
| 1876 |
MVTable *mv; |
| 1877 |
int code, mx, my;
|
| 1878 |
|
| 1879 |
mv = &mv_tables[s->mv_table_index]; |
| 1880 |
|
| 1881 |
code = get_vlc2(&s->gb, mv->vlc.table, MV_VLC_BITS, 2);
|
| 1882 |
if (code < 0){ |
| 1883 |
av_log(s->avctx, AV_LOG_ERROR, "illegal MV code at %d %d\n", s->mb_x, s->mb_y);
|
| 1884 |
return -1; |
| 1885 |
} |
| 1886 |
if (code == mv->n) {
|
| 1887 |
//printf("MV ESC %X at %d %d\n", show_bits(&s->gb, 24), s->mb_x, s->mb_y);
|
| 1888 |
mx = get_bits(&s->gb, 6);
|
| 1889 |
my = get_bits(&s->gb, 6);
|
| 1890 |
} else {
|
| 1891 |
mx = mv->table_mvx[code]; |
| 1892 |
my = mv->table_mvy[code]; |
| 1893 |
} |
| 1894 |
|
| 1895 |
mx += *mx_ptr - 32;
|
| 1896 |
my += *my_ptr - 32;
|
| 1897 |
/* WARNING : they do not do exactly modulo encoding */
|
| 1898 |
if (mx <= -64) |
| 1899 |
mx += 64;
|
| 1900 |
else if (mx >= 64) |
| 1901 |
mx -= 64;
|
| 1902 |
|
| 1903 |
if (my <= -64) |
| 1904 |
my += 64;
|
| 1905 |
else if (my >= 64) |
| 1906 |
my -= 64;
|
| 1907 |
*mx_ptr = mx; |
| 1908 |
*my_ptr = my; |
| 1909 |
return 0; |
| 1910 |
} |
| 1911 |
|
| 1912 |
AVCodec ff_msmpeg4v1_decoder = {
|
| 1913 |
"msmpeg4v1",
|
| 1914 |
AVMEDIA_TYPE_VIDEO, |
| 1915 |
CODEC_ID_MSMPEG4V1, |
| 1916 |
sizeof(MpegEncContext),
|
| 1917 |
ff_msmpeg4_decode_init, |
| 1918 |
NULL,
|
| 1919 |
ff_h263_decode_end, |
| 1920 |
ff_h263_decode_frame, |
| 1921 |
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, |
| 1922 |
.max_lowres= 3,
|
| 1923 |
.long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 1"),
|
| 1924 |
.pix_fmts= ff_pixfmt_list_420, |
| 1925 |
}; |
| 1926 |
|
| 1927 |
AVCodec ff_msmpeg4v2_decoder = {
|
| 1928 |
"msmpeg4v2",
|
| 1929 |
AVMEDIA_TYPE_VIDEO, |
| 1930 |
CODEC_ID_MSMPEG4V2, |
| 1931 |
sizeof(MpegEncContext),
|
| 1932 |
ff_msmpeg4_decode_init, |
| 1933 |
NULL,
|
| 1934 |
ff_h263_decode_end, |
| 1935 |
ff_h263_decode_frame, |
| 1936 |
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, |
| 1937 |
.max_lowres= 3,
|
| 1938 |
.long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 2"),
|
| 1939 |
.pix_fmts= ff_pixfmt_list_420, |
| 1940 |
}; |
| 1941 |
|
| 1942 |
AVCodec ff_msmpeg4v3_decoder = {
|
| 1943 |
"msmpeg4",
|
| 1944 |
AVMEDIA_TYPE_VIDEO, |
| 1945 |
CODEC_ID_MSMPEG4V3, |
| 1946 |
sizeof(MpegEncContext),
|
| 1947 |
ff_msmpeg4_decode_init, |
| 1948 |
NULL,
|
| 1949 |
ff_h263_decode_end, |
| 1950 |
ff_h263_decode_frame, |
| 1951 |
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, |
| 1952 |
.max_lowres= 3,
|
| 1953 |
.long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 3"),
|
| 1954 |
.pix_fmts= ff_pixfmt_list_420, |
| 1955 |
}; |
| 1956 |
|
| 1957 |
AVCodec ff_wmv1_decoder = {
|
| 1958 |
"wmv1",
|
| 1959 |
AVMEDIA_TYPE_VIDEO, |
| 1960 |
CODEC_ID_WMV1, |
| 1961 |
sizeof(MpegEncContext),
|
| 1962 |
ff_msmpeg4_decode_init, |
| 1963 |
NULL,
|
| 1964 |
ff_h263_decode_end, |
| 1965 |
ff_h263_decode_frame, |
| 1966 |
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, |
| 1967 |
.max_lowres= 3,
|
| 1968 |
.long_name= NULL_IF_CONFIG_SMALL("Windows Media Video 7"),
|
| 1969 |
.pix_fmts= ff_pixfmt_list_420, |
| 1970 |
}; |