X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fmsmpeg4.c;h=3ab3bd53344e158b2700e9462c528b057c6b4265;hb=b0e6b3f4777910d61083976aa9fc78a1e0731aae;hp=93191ccf10e63c0defed52e35b49df6c54434863;hpb=124e28847b95a70724399c8473dd778b5c4c8ffc;p=ffmpeg diff --git a/libavcodec/msmpeg4.c b/libavcodec/msmpeg4.c index 93191ccf10e..3ab3bd53344 100644 --- a/libavcodec/msmpeg4.c +++ b/libavcodec/msmpeg4.c @@ -28,49 +28,25 @@ */ #include "avcodec.h" -#include "dsputil.h" +#include "idctdsp.h" #include "mpegvideo.h" #include "msmpeg4.h" -#include "libavutil/x86_cpu.h" +#include "libavutil/x86/asm.h" #include "h263.h" #include "mpeg4video.h" +#include "msmpeg4data.h" +#include "mpegvideodata.h" +#include "vc1data.h" /* - * You can also call this codec : MPEG4 with a twist ! + * You can also call this codec: MPEG-4 with a twist! * * TODO: * - (encoding) select best mv table (two choices) * - (encoding) select best vlc/dc table */ -//#define DEBUG - -#define DC_VLC_BITS 9 -#define V2_INTRA_CBPC_VLC_BITS 3 -#define V2_MB_TYPE_VLC_BITS 7 -#define MV_VLC_BITS 9 -#define V2_MV_VLC_BITS 9 -#define TEX_VLC_BITS 9 - -#define II_BITRATE 128*1024 -#define MBAC_BITRATE 50*1024 - -#define DEFAULT_INTER_INDEX 3 - -static uint32_t v2_dc_lum_table[512][2]; -static uint32_t v2_dc_chroma_table[512][2]; - -/* vc1 externs */ -extern const uint8_t wmv3_dc_scale_table[32]; - -#include "msmpeg4data.h" - -#if CONFIG_ENCODERS //strangely gcc includes this even if it is not referenced -static uint8_t rl_length[NB_RL_TABLES][MAX_LEVEL+1][MAX_RUN+1][2]; -#endif //CONFIG_ENCODERS -static uint8_t static_rl_table_store[NB_RL_TABLES][2][2*MAX_RUN + MAX_LEVEL + 3]; - -/* This table is practically identical to the one from h263 +/* This table is practically identical to the one from H.263 * except that it is inverted. */ static av_cold void init_h263_dc_for_msmpeg4(void) { @@ -91,7 +67,7 @@ static av_cold void init_h263_dc_for_msmpeg4(void) else l= level; - /* luminance h263 */ + /* luminance H.263 */ uni_code= ff_mpeg4_DCtab_lum[size][0]; uni_len = ff_mpeg4_DCtab_lum[size][1]; uni_code ^= (1<workaround_bugs){ - s->y_dc_scale_table= old_ff_y_dc_scale_table; - s->c_dc_scale_table= wmv1_c_dc_scale_table; + s->y_dc_scale_table= ff_old_ff_y_dc_scale_table; + s->c_dc_scale_table= ff_wmv1_c_dc_scale_table; } else{ s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table; @@ -147,13 +123,13 @@ static av_cold void common_init(MpegEncContext * s) break; case 4: case 5: - s->y_dc_scale_table= wmv1_y_dc_scale_table; - s->c_dc_scale_table= wmv1_c_dc_scale_table; + s->y_dc_scale_table= ff_wmv1_y_dc_scale_table; + s->c_dc_scale_table= ff_wmv1_c_dc_scale_table; break; #if CONFIG_VC1_DECODER case 6: - s->y_dc_scale_table= wmv3_dc_scale_table; - s->c_dc_scale_table= wmv3_dc_scale_table; + s->y_dc_scale_table= ff_wmv3_dc_scale_table; + s->c_dc_scale_table= ff_wmv3_dc_scale_table; break; #endif @@ -161,10 +137,10 @@ static av_cold void common_init(MpegEncContext * s) if(s->msmpeg4_version>=4){ - ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , wmv1_scantable[1]); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, wmv1_scantable[2]); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, wmv1_scantable[3]); - ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , wmv1_scantable[0]); + ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_wmv1_scantable[1]); + ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable, ff_wmv1_scantable[2]); + ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable, ff_wmv1_scantable[3]); + ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_wmv1_scantable[0]); } //Note the default tables are set in common_init in mpegvideo.c @@ -175,251 +151,6 @@ static av_cold void common_init(MpegEncContext * s) } } -#if CONFIG_ENCODERS - -/* build the table which associate a (x,y) motion vector to a vlc */ -static void init_mv_table(MVTable *tab) -{ - int i, x, y; - - tab->table_mv_index = av_malloc(sizeof(uint16_t) * 4096); - /* mark all entries as not used */ - for(i=0;i<4096;i++) - tab->table_mv_index[i] = tab->n; - - for(i=0;in;i++) { - x = tab->table_mvx[i]; - y = tab->table_mvy[i]; - tab->table_mv_index[(x << 6) | y] = i; - } -} - -void ff_msmpeg4_code012(PutBitContext *pb, int n) -{ - if (n == 0) { - put_bits(pb, 1, 0); - } else { - put_bits(pb, 1, 1); - put_bits(pb, 1, (n >= 2)); - } -} - -static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra){ - int size=0; - int code; - int run_diff= intra ? 0 : 1; - - code = get_rl_index(rl, last, run, level); - size+= rl->table_vlc[code][1]; - if (code == rl->n) { - int level1, run1; - - level1 = level - rl->max_level[last][run]; - if (level1 < 1) - goto esc2; - code = get_rl_index(rl, last, run, level1); - if (code == rl->n) { - esc2: - size++; - if (level > MAX_LEVEL) - goto esc3; - run1 = run - rl->max_run[last][level] - run_diff; - if (run1 < 0) - goto esc3; - code = get_rl_index(rl, last, run1, level); - if (code == rl->n) { - esc3: - /* third escape */ - size+=1+1+6+8; - } else { - /* second escape */ - size+= 1+1+ rl->table_vlc[code][1]; - } - } else { - /* first escape */ - size+= 1+1+ rl->table_vlc[code][1]; - } - } else { - size++; - } - return size; -} - -av_cold void ff_msmpeg4_encode_init(MpegEncContext *s) -{ - static int init_done=0; - int i; - - common_init(s); - if(s->msmpeg4_version>=4){ - s->min_qcoeff= -255; - s->max_qcoeff= 255; - } - - if (!init_done) { - /* init various encoding tables */ - init_done = 1; - init_mv_table(&mv_tables[0]); - init_mv_table(&mv_tables[1]); - for(i=0;i0){// ;) - size++; - chroma_size++; - } - for(level=0; level<=MAX_LEVEL; level++){ - int run; - for(run=0; run<=MAX_RUN; run++){ - int last; - const int last_size= size + chroma_size; - for(last=0; last<2; last++){ - int inter_count = s->ac_stats[0][0][level][run][last] + s->ac_stats[0][1][level][run][last]; - int intra_luma_count = s->ac_stats[1][0][level][run][last]; - int intra_chroma_count= s->ac_stats[1][1][level][run][last]; - - if(s->pict_type==AV_PICTURE_TYPE_I){ - size += intra_luma_count *rl_length[i ][level][run][last]; - chroma_size+= intra_chroma_count*rl_length[i+3][level][run][last]; - }else{ - size+= intra_luma_count *rl_length[i ][level][run][last] - +intra_chroma_count*rl_length[i+3][level][run][last] - +inter_count *rl_length[i+3][level][run][last]; - } - } - if(last_size == size+chroma_size) break; - } - } - if(sizepict_type, best, s->qscale, s->mb_var_sum, s->mc_mb_var_sum, best_size); - - if(s->pict_type==AV_PICTURE_TYPE_P) chroma_best= best; - - memset(s->ac_stats, 0, sizeof(int)*(MAX_LEVEL+1)*(MAX_RUN+1)*2*2*2); - - s->rl_table_index = best; - s->rl_chroma_table_index= chroma_best; - - if(s->pict_type != s->last_non_b_pict_type){ - s->rl_table_index= 2; - if(s->pict_type==AV_PICTURE_TYPE_I) - s->rl_chroma_table_index= 1; - else - s->rl_chroma_table_index= 2; - } - -} - -/* write MSMPEG4 compatible frame header */ -void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number) -{ - find_best_tables(s); - - avpriv_align_put_bits(&s->pb); - put_bits(&s->pb, 2, s->pict_type - 1); - - put_bits(&s->pb, 5, s->qscale); - if(s->msmpeg4_version<=2){ - s->rl_table_index = 2; - s->rl_chroma_table_index = 2; - } - - s->dc_table_index = 1; - s->mv_table_index = 1; /* only if P frame */ - s->use_skip_mb_code = 1; /* only if P frame */ - s->per_mb_rl_table = 0; - if(s->msmpeg4_version==4) - s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE && s->pict_type==AV_PICTURE_TYPE_P); -//printf("%d %d %d %d %d\n", s->pict_type, s->bit_rate, s->inter_intra_pred, s->width, s->height); - - if (s->pict_type == AV_PICTURE_TYPE_I) { - s->slice_height= s->mb_height/1; - put_bits(&s->pb, 5, 0x16 + s->mb_height/s->slice_height); - - if(s->msmpeg4_version==4){ - msmpeg4_encode_ext_header(s); - if(s->bit_rate>MBAC_BITRATE) - put_bits(&s->pb, 1, s->per_mb_rl_table); - } - - if(s->msmpeg4_version>2){ - if(!s->per_mb_rl_table){ - ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index); - ff_msmpeg4_code012(&s->pb, s->rl_table_index); - } - - put_bits(&s->pb, 1, s->dc_table_index); - } - } else { - put_bits(&s->pb, 1, s->use_skip_mb_code); - - if(s->msmpeg4_version==4 && s->bit_rate>MBAC_BITRATE) - put_bits(&s->pb, 1, s->per_mb_rl_table); - - if(s->msmpeg4_version>2){ - if(!s->per_mb_rl_table) - ff_msmpeg4_code012(&s->pb, s->rl_table_index); - - put_bits(&s->pb, 1, s->dc_table_index); - - put_bits(&s->pb, 1, s->mv_table_index); - } - } - - s->esc3_level_length= 0; - s->esc3_run_length= 0; -} - -void msmpeg4_encode_ext_header(MpegEncContext * s) -{ - put_bits(&s->pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29 - - put_bits(&s->pb, 11, FFMIN(s->bit_rate/1024, 2047)); - - if(s->msmpeg4_version>=3) - put_bits(&s->pb, 1, s->flipflop_rounding); - else - assert(s->flipflop_rounding==0); -} - -#endif //CONFIG_ENCODERS - /* predict coded block */ int ff_msmpeg4_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr) { @@ -447,232 +178,6 @@ int ff_msmpeg4_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block return pred; } -#if CONFIG_ENCODERS - -void ff_msmpeg4_encode_motion(MpegEncContext * s, - int mx, int my) -{ - int code; - MVTable *mv; - - /* modulo encoding */ - /* WARNING : you cannot reach all the MVs even with the modulo - encoding. This is a somewhat strange compromise they took !!! */ - if (mx <= -64) - mx += 64; - else if (mx >= 64) - mx -= 64; - if (my <= -64) - my += 64; - else if (my >= 64) - my -= 64; - - mx += 32; - my += 32; -#if 0 - if ((unsigned)mx >= 64 || - (unsigned)my >= 64) - av_log(s->avctx, AV_LOG_ERROR, "error mx=%d my=%d\n", mx, my); -#endif - mv = &mv_tables[s->mv_table_index]; - - code = mv->table_mv_index[(mx << 6) | my]; - put_bits(&s->pb, - mv->table_mv_bits[code], - mv->table_mv_code[code]); - if (code == mv->n) { - /* escape : code literally */ - put_bits(&s->pb, 6, mx); - put_bits(&s->pb, 6, my); - } -} - -void ff_msmpeg4_handle_slices(MpegEncContext *s){ - if (s->mb_x == 0) { - if (s->slice_height && (s->mb_y % s->slice_height) == 0) { - if(s->msmpeg4_version < 4){ - ff_mpeg4_clean_buffers(s); - } - s->first_slice_line = 1; - } else { - s->first_slice_line = 0; - } - } -} - -static void msmpeg4v2_encode_motion(MpegEncContext * s, int val) -{ - int range, bit_size, sign, code, bits; - - if (val == 0) { - /* zero vector */ - code = 0; - put_bits(&s->pb, mvtab[code][1], mvtab[code][0]); - } else { - bit_size = s->f_code - 1; - range = 1 << bit_size; - if (val <= -64) - val += 64; - else if (val >= 64) - val -= 64; - - if (val >= 0) { - sign = 0; - } else { - val = -val; - sign = 1; - } - val--; - code = (val >> bit_size) + 1; - bits = val & (range - 1); - - put_bits(&s->pb, mvtab[code][1] + 1, (mvtab[code][0] << 1) | sign); - if (bit_size > 0) { - put_bits(&s->pb, bit_size, bits); - } - } -} - -void msmpeg4_encode_mb(MpegEncContext * s, - DCTELEM block[6][64], - int motion_x, int motion_y) -{ - int cbp, coded_cbp, i; - int pred_x, pred_y; - uint8_t *coded_block; - - ff_msmpeg4_handle_slices(s); - - if (!s->mb_intra) { - /* compute cbp */ - cbp = 0; - for (i = 0; i < 6; i++) { - if (s->block_last_index[i] >= 0) - cbp |= 1 << (5 - i); - } - if (s->use_skip_mb_code && (cbp | motion_x | motion_y) == 0) { - /* skip macroblock */ - put_bits(&s->pb, 1, 1); - s->last_bits++; - s->misc_bits++; - s->skip_count++; - - return; - } - if (s->use_skip_mb_code) - put_bits(&s->pb, 1, 0); /* mb coded */ - - if(s->msmpeg4_version<=2){ - put_bits(&s->pb, - v2_mb_type[cbp&3][1], - v2_mb_type[cbp&3][0]); - if((cbp&3) != 3) coded_cbp= cbp ^ 0x3C; - else coded_cbp= cbp; - - put_bits(&s->pb, - ff_h263_cbpy_tab[coded_cbp>>2][1], - ff_h263_cbpy_tab[coded_cbp>>2][0]); - - s->misc_bits += get_bits_diff(s); - - h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - msmpeg4v2_encode_motion(s, motion_x - pred_x); - msmpeg4v2_encode_motion(s, motion_y - pred_y); - }else{ - put_bits(&s->pb, - table_mb_non_intra[cbp + 64][1], - table_mb_non_intra[cbp + 64][0]); - - s->misc_bits += get_bits_diff(s); - - /* motion vector */ - h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - ff_msmpeg4_encode_motion(s, motion_x - pred_x, - motion_y - pred_y); - } - - s->mv_bits += get_bits_diff(s); - - for (i = 0; i < 6; i++) { - ff_msmpeg4_encode_block(s, block[i], i); - } - s->p_tex_bits += get_bits_diff(s); - } else { - /* compute cbp */ - cbp = 0; - coded_cbp = 0; - for (i = 0; i < 6; i++) { - int val, pred; - val = (s->block_last_index[i] >= 1); - cbp |= val << (5 - i); - if (i < 4) { - /* predict value for close blocks only for luma */ - pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block); - *coded_block = val; - val = val ^ pred; - } - coded_cbp |= val << (5 - i); - } - - if(s->msmpeg4_version<=2){ - if (s->pict_type == AV_PICTURE_TYPE_I) { - put_bits(&s->pb, - v2_intra_cbpc[cbp&3][1], v2_intra_cbpc[cbp&3][0]); - } else { - if (s->use_skip_mb_code) - put_bits(&s->pb, 1, 0); /* mb coded */ - put_bits(&s->pb, - v2_mb_type[(cbp&3) + 4][1], - v2_mb_type[(cbp&3) + 4][0]); - } - put_bits(&s->pb, 1, 0); /* no AC prediction yet */ - put_bits(&s->pb, - ff_h263_cbpy_tab[cbp>>2][1], - ff_h263_cbpy_tab[cbp>>2][0]); - }else{ - if (s->pict_type == AV_PICTURE_TYPE_I) { - put_bits(&s->pb, - ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]); - } else { - if (s->use_skip_mb_code) - put_bits(&s->pb, 1, 0); /* mb coded */ - put_bits(&s->pb, - table_mb_non_intra[cbp][1], - table_mb_non_intra[cbp][0]); - } - put_bits(&s->pb, 1, 0); /* no AC prediction yet */ - if(s->inter_intra_pred){ - s->h263_aic_dir=0; - put_bits(&s->pb, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]); - } - } - s->misc_bits += get_bits_diff(s); - - for (i = 0; i < 6; i++) { - ff_msmpeg4_encode_block(s, block[i], i); - } - s->i_tex_bits += get_bits_diff(s); - s->i_count++; - } -} - -#endif //CONFIG_ENCODERS - -static inline int msmpeg4v1_pred_dc(MpegEncContext * s, int n, - int32_t **dc_val_ptr) -{ - int i; - - if (n < 4) { - i= 0; - } else { - i= n-3; - } - - *dc_val_ptr= &s->last_dc[i]; - return s->last_dc[i]; -} - static int get_dc(uint8_t *src, int stride, int scale) { int y; @@ -687,8 +192,8 @@ static int get_dc(uint8_t *src, int stride, int scale) } /* dir = 0: left, dir = 1: top prediction */ -static inline int msmpeg4_pred_dc(MpegEncContext * s, int n, - int16_t **dc_val_ptr, int *dir_ptr) +int ff_msmpeg4_pred_dc(MpegEncContext *s, int n, + int16_t **dc_val_ptr, int *dir_ptr) { int a, b, c, wrap, pred, scale; int16_t *dc_val; @@ -738,10 +243,7 @@ static inline int msmpeg4_pred_dc(MpegEncContext * s, int n, : "%eax", "%edx" ); #else - /* #elif ARCH_ALPHA */ - /* Divisions are extremely costly on Alpha; optimize the most - common case. But they are costly everywhere... - */ + /* Divisions are costly everywhere; optimize the most common case. */ if (scale == 8) { a = (a + (8 >> 1)) / 8; b = (b + (8 >> 1)) / 8; @@ -752,7 +254,7 @@ static inline int msmpeg4_pred_dc(MpegEncContext * s, int n, c = FASTDIV((c + (scale >> 1)), scale); } #endif - /* XXX: WARNING: they did not choose the same test as MPEG4. This + /* XXX: WARNING: they did not choose the same test as MPEG-4. This is very important ! */ if(s->msmpeg4_version>3){ if(s->inter_intra_pred){ @@ -776,10 +278,10 @@ static inline int msmpeg4_pred_dc(MpegEncContext * s, int n, }else{ if(n<4){ wrap= s->linesize; - dest= s->current_picture.f.data[0] + (((n >> 1) + 2*s->mb_y) * 8* wrap ) + ((n & 1) + 2*s->mb_x) * 8; + dest= s->current_picture.f->data[0] + (((n >> 1) + 2*s->mb_y) * 8* wrap ) + ((n & 1) + 2*s->mb_x) * 8; }else{ wrap= s->uvlinesize; - dest= s->current_picture.f.data[n - 3] + (s->mb_y * 8 * wrap) + s->mb_x * 8; + dest= s->current_picture.f->data[n - 3] + (s->mb_y * 8 * wrap) + s->mb_x * 8; } if(s->mb_x==0) a= (1024 + (scale>>1))/scale; else a= get_dc(dest-8, wrap, scale*8); @@ -834,1103 +336,3 @@ static inline int msmpeg4_pred_dc(MpegEncContext * s, int n, return pred; } -#define DC_MAX 119 - -static void msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr) -{ - int sign, code; - int pred, extquant; - int extrabits = 0; - - int16_t *dc_val; - pred = msmpeg4_pred_dc(s, n, &dc_val, dir_ptr); - - /* update predictor */ - if (n < 4) { - *dc_val = level * s->y_dc_scale; - } else { - *dc_val = level * s->c_dc_scale; - } - - /* do the prediction */ - level -= pred; - - if(s->msmpeg4_version<=2){ - if (n < 4) { - put_bits(&s->pb, - v2_dc_lum_table[level+256][1], - v2_dc_lum_table[level+256][0]); - }else{ - put_bits(&s->pb, - v2_dc_chroma_table[level+256][1], - v2_dc_chroma_table[level+256][0]); - } - }else{ - sign = 0; - if (level < 0) { - level = -level; - sign = 1; - } - code = level; - if (code > DC_MAX) - code = DC_MAX; - else if( s->msmpeg4_version>=6 ) { - if( s->qscale == 1 ) { - extquant = (level + 3) & 0x3; - code = ((level+3)>>2); - } else if( s->qscale == 2 ) { - extquant = (level + 1) & 0x1; - code = ((level+1)>>1); - } - } - - if (s->dc_table_index == 0) { - if (n < 4) { - put_bits(&s->pb, ff_table0_dc_lum[code][1], ff_table0_dc_lum[code][0]); - } else { - put_bits(&s->pb, ff_table0_dc_chroma[code][1], ff_table0_dc_chroma[code][0]); - } - } else { - if (n < 4) { - put_bits(&s->pb, ff_table1_dc_lum[code][1], ff_table1_dc_lum[code][0]); - } else { - put_bits(&s->pb, ff_table1_dc_chroma[code][1], ff_table1_dc_chroma[code][0]); - } - } - - if(s->msmpeg4_version>=6 && s->qscale<=2) - extrabits = 3 - s->qscale; - - if (code == DC_MAX) - put_bits(&s->pb, 8 + extrabits, level); - else if(extrabits > 0)//== VC1 && s->qscale<=2 - put_bits(&s->pb, extrabits, extquant); - - if (level != 0) { - put_bits(&s->pb, 1, sign); - } - } -} - -/* Encoding of a block. Very similar to MPEG4 except for a different - escape coding (same as H263) and more vlc tables. - */ -void ff_msmpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n) -{ - int level, run, last, i, j, last_index; - int last_non_zero, sign, slevel; - int code, run_diff, dc_pred_dir; - const RLTable *rl; - const uint8_t *scantable; - - if (s->mb_intra) { - msmpeg4_encode_dc(s, block[0], n, &dc_pred_dir); - i = 1; - if (n < 4) { - rl = &rl_table[s->rl_table_index]; - } else { - rl = &rl_table[3 + s->rl_chroma_table_index]; - } - run_diff = s->msmpeg4_version>=4; - scantable= s->intra_scantable.permutated; - } else { - i = 0; - rl = &rl_table[3 + s->rl_table_index]; - if(s->msmpeg4_version<=2) - run_diff = 0; - else - run_diff = 1; - scantable= s->inter_scantable.permutated; - } - - /* recalculate block_last_index for M$ wmv1 */ - if(s->msmpeg4_version>=4 && s->msmpeg4_version<6 && s->block_last_index[n]>0){ - for(last_index=63; last_index>=0; last_index--){ - if(block[scantable[last_index]]) break; - } - s->block_last_index[n]= last_index; - }else - last_index = s->block_last_index[n]; - /* AC coefs */ - last_non_zero = i - 1; - for (; i <= last_index; i++) { - j = scantable[i]; - level = block[j]; - if (level) { - run = i - last_non_zero - 1; - last = (i == last_index); - sign = 0; - slevel = level; - if (level < 0) { - sign = 1; - level = -level; - } - - if(level<=MAX_LEVEL && run<=MAX_RUN){ - s->ac_stats[s->mb_intra][n>3][level][run][last]++; - } - - s->ac_stats[s->mb_intra][n > 3][40][63][0]++; //esc3 like - - code = get_rl_index(rl, last, run, level); - put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); - if (code == rl->n) { - int level1, run1; - - level1 = level - rl->max_level[last][run]; - if (level1 < 1) - goto esc2; - code = get_rl_index(rl, last, run, level1); - if (code == rl->n) { - esc2: - put_bits(&s->pb, 1, 0); - if (level > MAX_LEVEL) - goto esc3; - run1 = run - rl->max_run[last][level] - run_diff; - if (run1 < 0) - goto esc3; - code = get_rl_index(rl, last, run1+1, level); - if (s->msmpeg4_version == 4 && code == rl->n) - goto esc3; - code = get_rl_index(rl, last, run1, level); - if (code == rl->n) { - esc3: - /* third escape */ - put_bits(&s->pb, 1, 0); - put_bits(&s->pb, 1, last); - if(s->msmpeg4_version>=4){ - if(s->esc3_level_length==0){ - s->esc3_level_length=8; - s->esc3_run_length= 6; - //ESCLVLSZ + ESCRUNSZ - if(s->qscale<8) - put_bits(&s->pb, 6 + (s->msmpeg4_version>=6), 3); - else - put_bits(&s->pb, 8, 3); - } - put_bits(&s->pb, s->esc3_run_length, run); - put_bits(&s->pb, 1, sign); - put_bits(&s->pb, s->esc3_level_length, level); - }else{ - put_bits(&s->pb, 6, run); - put_sbits(&s->pb, 8, slevel); - } - } else { - /* second escape */ - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); - put_bits(&s->pb, 1, sign); - } - } else { - /* first escape */ - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); - put_bits(&s->pb, 1, sign); - } - } else { - put_bits(&s->pb, 1, sign); - } - last_non_zero = i; - } - } -} - -/****************************************/ -/* decoding stuff */ - -VLC ff_mb_non_intra_vlc[4]; -static VLC v2_dc_lum_vlc; -static VLC v2_dc_chroma_vlc; -static VLC v2_intra_cbpc_vlc; -static VLC v2_mb_type_vlc; -static VLC v2_mv_vlc; -VLC ff_inter_intra_vlc; - -/* This is identical to h263 except that its range is multiplied by 2. */ -static int msmpeg4v2_decode_motion(MpegEncContext * s, int pred, int f_code) -{ - int code, val, sign, shift; - - code = get_vlc2(&s->gb, v2_mv_vlc.table, V2_MV_VLC_BITS, 2); -// printf("MV code %d at %d %d pred: %d\n", code, s->mb_x,s->mb_y, pred); - if (code < 0) - return 0xffff; - - if (code == 0) - return pred; - sign = get_bits1(&s->gb); - shift = f_code - 1; - val = code; - if (shift) { - val = (val - 1) << shift; - val |= get_bits(&s->gb, shift); - val++; - } - if (sign) - val = -val; - - val += pred; - if (val <= -64) - val += 64; - else if (val >= 64) - val -= 64; - - return val; -} - -static int msmpeg4v12_decode_mb(MpegEncContext *s, DCTELEM block[6][64]) -{ - int cbp, code, i; - - if (s->pict_type == AV_PICTURE_TYPE_P) { - if (s->use_skip_mb_code) { - if (get_bits1(&s->gb)) { - /* skip mb */ - s->mb_intra = 0; - for(i=0;i<6;i++) - s->block_last_index[i] = -1; - s->mv_dir = MV_DIR_FORWARD; - s->mv_type = MV_TYPE_16X16; - s->mv[0][0][0] = 0; - s->mv[0][0][1] = 0; - s->mb_skipped = 1; - return 0; - } - } - - if(s->msmpeg4_version==2) - code = get_vlc2(&s->gb, v2_mb_type_vlc.table, V2_MB_TYPE_VLC_BITS, 1); - else - code = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); - if(code<0 || code>7){ - av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", code, s->mb_x, s->mb_y); - return -1; - } - - s->mb_intra = code >>2; - - cbp = code & 0x3; - } else { - s->mb_intra = 1; - if(s->msmpeg4_version==2) - cbp= get_vlc2(&s->gb, v2_intra_cbpc_vlc.table, V2_INTRA_CBPC_VLC_BITS, 1); - else - cbp= get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 1); - if(cbp<0 || cbp>3){ - av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y); - return -1; - } - } - - if (!s->mb_intra) { - int mx, my, cbpy; - - cbpy= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); - if(cbpy<0){ - av_log(s->avctx, AV_LOG_ERROR, "cbpy %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y); - return -1; - } - - cbp|= cbpy<<2; - if(s->msmpeg4_version==1 || (cbp&3) != 3) cbp^= 0x3C; - - h263_pred_motion(s, 0, 0, &mx, &my); - mx= msmpeg4v2_decode_motion(s, mx, 1); - my= msmpeg4v2_decode_motion(s, my, 1); - - s->mv_dir = MV_DIR_FORWARD; - s->mv_type = MV_TYPE_16X16; - s->mv[0][0][0] = mx; - s->mv[0][0][1] = my; - } else { - if(s->msmpeg4_version==2){ - s->ac_pred = get_bits1(&s->gb); - cbp|= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors - } else{ - s->ac_pred = 0; - cbp|= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors - if(s->pict_type==AV_PICTURE_TYPE_P) cbp^=0x3C; - } - } - - s->dsp.clear_blocks(s->block[0]); - for (i = 0; i < 6; i++) { - if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) - { - av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); - return -1; - } - } - return 0; -} - -static int msmpeg4v34_decode_mb(MpegEncContext *s, DCTELEM block[6][64]) -{ - int cbp, code, i; - uint8_t *coded_val; - uint32_t * const mb_type_ptr = &s->current_picture.f.mb_type[s->mb_x + s->mb_y*s->mb_stride]; - - if (s->pict_type == AV_PICTURE_TYPE_P) { - if (s->use_skip_mb_code) { - if (get_bits1(&s->gb)) { - /* skip mb */ - s->mb_intra = 0; - for(i=0;i<6;i++) - s->block_last_index[i] = -1; - s->mv_dir = MV_DIR_FORWARD; - s->mv_type = MV_TYPE_16X16; - s->mv[0][0][0] = 0; - s->mv[0][0][1] = 0; - s->mb_skipped = 1; - *mb_type_ptr = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; - - return 0; - } - } - - code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[DEFAULT_INTER_INDEX].table, MB_NON_INTRA_VLC_BITS, 3); - if (code < 0) - return -1; - //s->mb_intra = (code & 0x40) ? 0 : 1; - s->mb_intra = (~code & 0x40) >> 6; - - cbp = code & 0x3f; - } else { - s->mb_intra = 1; - code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2); - if (code < 0) - return -1; - /* predict coded block pattern */ - cbp = 0; - for(i=0;i<6;i++) { - int val = ((code >> (5 - i)) & 1); - if (i < 4) { - int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val); - val = val ^ pred; - *coded_val = val; - } - cbp |= val << (5 - i); - } - } - - if (!s->mb_intra) { - int mx, my; -//printf("P at %d %d\n", s->mb_x, s->mb_y); - if(s->per_mb_rl_table && cbp){ - s->rl_table_index = decode012(&s->gb); - s->rl_chroma_table_index = s->rl_table_index; - } - h263_pred_motion(s, 0, 0, &mx, &my); - if (ff_msmpeg4_decode_motion(s, &mx, &my) < 0) - return -1; - s->mv_dir = MV_DIR_FORWARD; - s->mv_type = MV_TYPE_16X16; - s->mv[0][0][0] = mx; - s->mv[0][0][1] = my; - *mb_type_ptr = MB_TYPE_L0 | MB_TYPE_16x16; - } else { -//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)); - s->ac_pred = get_bits1(&s->gb); - *mb_type_ptr = MB_TYPE_INTRA; - if(s->inter_intra_pred){ - s->h263_aic_dir= get_vlc2(&s->gb, ff_inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1); -// printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y); - } - if(s->per_mb_rl_table && cbp){ - s->rl_table_index = decode012(&s->gb); - s->rl_chroma_table_index = s->rl_table_index; - } - } - - s->dsp.clear_blocks(s->block[0]); - for (i = 0; i < 6; i++) { - if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) - { - av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); - return -1; - } - } - - return 0; -} - -/* init all vlc decoding tables */ -av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx) -{ - MpegEncContext *s = avctx->priv_data; - static int done = 0; - int i; - MVTable *mv; - - if (ff_h263_decode_init(avctx) < 0) - return -1; - - common_init(s); - - if (!done) { - done = 1; - - for(i=0;ivlc, MV_VLC_BITS, mv->n + 1, - mv->table_mv_bits, 1, 1, - mv->table_mv_code, 2, 2, 3714); - mv = &mv_tables[1]; - INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, mv->n + 1, - mv->table_mv_bits, 1, 1, - mv->table_mv_code, 2, 2, 2694); - - INIT_VLC_STATIC(&ff_msmp4_dc_luma_vlc[0], DC_VLC_BITS, 120, - &ff_table0_dc_lum[0][1], 8, 4, - &ff_table0_dc_lum[0][0], 8, 4, 1158); - INIT_VLC_STATIC(&ff_msmp4_dc_chroma_vlc[0], DC_VLC_BITS, 120, - &ff_table0_dc_chroma[0][1], 8, 4, - &ff_table0_dc_chroma[0][0], 8, 4, 1118); - INIT_VLC_STATIC(&ff_msmp4_dc_luma_vlc[1], DC_VLC_BITS, 120, - &ff_table1_dc_lum[0][1], 8, 4, - &ff_table1_dc_lum[0][0], 8, 4, 1476); - INIT_VLC_STATIC(&ff_msmp4_dc_chroma_vlc[1], DC_VLC_BITS, 120, - &ff_table1_dc_chroma[0][1], 8, 4, - &ff_table1_dc_chroma[0][0], 8, 4, 1216); - - INIT_VLC_STATIC(&v2_dc_lum_vlc, DC_VLC_BITS, 512, - &v2_dc_lum_table[0][1], 8, 4, - &v2_dc_lum_table[0][0], 8, 4, 1472); - INIT_VLC_STATIC(&v2_dc_chroma_vlc, DC_VLC_BITS, 512, - &v2_dc_chroma_table[0][1], 8, 4, - &v2_dc_chroma_table[0][0], 8, 4, 1506); - - INIT_VLC_STATIC(&v2_intra_cbpc_vlc, V2_INTRA_CBPC_VLC_BITS, 4, - &v2_intra_cbpc[0][1], 2, 1, - &v2_intra_cbpc[0][0], 2, 1, 8); - INIT_VLC_STATIC(&v2_mb_type_vlc, V2_MB_TYPE_VLC_BITS, 8, - &v2_mb_type[0][1], 2, 1, - &v2_mb_type[0][0], 2, 1, 128); - INIT_VLC_STATIC(&v2_mv_vlc, V2_MV_VLC_BITS, 33, - &mvtab[0][1], 2, 1, - &mvtab[0][0], 2, 1, 538); - - INIT_VLC_STATIC(&ff_mb_non_intra_vlc[0], MB_NON_INTRA_VLC_BITS, 128, - &wmv2_inter_table[0][0][1], 8, 4, - &wmv2_inter_table[0][0][0], 8, 4, 1636); - INIT_VLC_STATIC(&ff_mb_non_intra_vlc[1], MB_NON_INTRA_VLC_BITS, 128, - &wmv2_inter_table[1][0][1], 8, 4, - &wmv2_inter_table[1][0][0], 8, 4, 2648); - INIT_VLC_STATIC(&ff_mb_non_intra_vlc[2], MB_NON_INTRA_VLC_BITS, 128, - &wmv2_inter_table[2][0][1], 8, 4, - &wmv2_inter_table[2][0][0], 8, 4, 1532); - INIT_VLC_STATIC(&ff_mb_non_intra_vlc[3], MB_NON_INTRA_VLC_BITS, 128, - &wmv2_inter_table[3][0][1], 8, 4, - &wmv2_inter_table[3][0][0], 8, 4, 2488); - - INIT_VLC_STATIC(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64, - &ff_msmp4_mb_i_table[0][1], 4, 2, - &ff_msmp4_mb_i_table[0][0], 4, 2, 536); - - INIT_VLC_STATIC(&ff_inter_intra_vlc, INTER_INTRA_VLC_BITS, 4, - &table_inter_intra[0][1], 2, 1, - &table_inter_intra[0][0], 2, 1, 8); - } - - switch(s->msmpeg4_version){ - case 1: - case 2: - s->decode_mb= msmpeg4v12_decode_mb; - break; - case 3: - case 4: - s->decode_mb= msmpeg4v34_decode_mb; - break; - case 5: - if (CONFIG_WMV2_DECODER) - s->decode_mb= ff_wmv2_decode_mb; - case 6: - //FIXME + TODO VC1 decode mb - break; - } - - s->slice_height= s->mb_height; //to avoid 1/0 if the first frame is not a keyframe - - return 0; -} - -int msmpeg4_decode_picture_header(MpegEncContext * s) -{ - int code; - - if(s->msmpeg4_version==1){ - int start_code = get_bits_long(&s->gb, 32); - if(start_code!=0x00000100){ - av_log(s->avctx, AV_LOG_ERROR, "invalid startcode\n"); - return -1; - } - - skip_bits(&s->gb, 5); // frame number */ - } - - s->pict_type = get_bits(&s->gb, 2) + 1; - if (s->pict_type != AV_PICTURE_TYPE_I && - s->pict_type != AV_PICTURE_TYPE_P){ - av_log(s->avctx, AV_LOG_ERROR, "invalid picture type\n"); - return -1; - } -#if 0 -{ - static int had_i=0; - if(s->pict_type == AV_PICTURE_TYPE_I) had_i=1; - if(!had_i) return -1; -} -#endif - s->chroma_qscale= s->qscale = get_bits(&s->gb, 5); - if(s->qscale==0){ - av_log(s->avctx, AV_LOG_ERROR, "invalid qscale\n"); - return -1; - } - - if (s->pict_type == AV_PICTURE_TYPE_I) { - code = get_bits(&s->gb, 5); - if(s->msmpeg4_version==1){ - if(code==0 || code>s->mb_height){ - av_log(s->avctx, AV_LOG_ERROR, "invalid slice height %d\n", code); - return -1; - } - - s->slice_height = code; - }else{ - /* 0x17: one slice, 0x18: two slices, ... */ - if (code < 0x17){ - av_log(s->avctx, AV_LOG_ERROR, "error, slice code was %X\n", code); - return -1; - } - - s->slice_height = s->mb_height / (code - 0x16); - } - - switch(s->msmpeg4_version){ - case 1: - case 2: - s->rl_chroma_table_index = 2; - s->rl_table_index = 2; - - s->dc_table_index = 0; //not used - break; - case 3: - s->rl_chroma_table_index = decode012(&s->gb); - s->rl_table_index = decode012(&s->gb); - - s->dc_table_index = get_bits1(&s->gb); - break; - case 4: - msmpeg4_decode_ext_header(s, (2+5+5+17+7)/8); - - if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb); - else s->per_mb_rl_table= 0; - - if(!s->per_mb_rl_table){ - s->rl_chroma_table_index = decode012(&s->gb); - s->rl_table_index = decode012(&s->gb); - } - - s->dc_table_index = get_bits1(&s->gb); - s->inter_intra_pred= 0; - break; - } - s->no_rounding = 1; - if(s->avctx->debug&FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d slice:%d \n", - s->qscale, - s->rl_chroma_table_index, - s->rl_table_index, - s->dc_table_index, - s->per_mb_rl_table, - s->slice_height); - } else { - switch(s->msmpeg4_version){ - case 1: - case 2: - if(s->msmpeg4_version==1) - s->use_skip_mb_code = 1; - else - s->use_skip_mb_code = get_bits1(&s->gb); - s->rl_table_index = 2; - s->rl_chroma_table_index = s->rl_table_index; - s->dc_table_index = 0; //not used - s->mv_table_index = 0; - break; - case 3: - s->use_skip_mb_code = get_bits1(&s->gb); - s->rl_table_index = decode012(&s->gb); - s->rl_chroma_table_index = s->rl_table_index; - - s->dc_table_index = get_bits1(&s->gb); - - s->mv_table_index = get_bits1(&s->gb); - break; - case 4: - s->use_skip_mb_code = get_bits1(&s->gb); - - if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb); - else s->per_mb_rl_table= 0; - - if(!s->per_mb_rl_table){ - s->rl_table_index = decode012(&s->gb); - s->rl_chroma_table_index = s->rl_table_index; - } - - s->dc_table_index = get_bits1(&s->gb); - - s->mv_table_index = get_bits1(&s->gb); - s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE); - break; - } - - if(s->avctx->debug&FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "skip:%d rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d \n", - s->use_skip_mb_code, - s->rl_table_index, - s->rl_chroma_table_index, - s->dc_table_index, - s->mv_table_index, - s->per_mb_rl_table, - s->qscale); - - if(s->flipflop_rounding){ - s->no_rounding ^= 1; - }else{ - s->no_rounding = 0; - } - } -//printf("%d %d %d %d %d\n", s->pict_type, s->bit_rate, s->inter_intra_pred, s->width, s->height); - - s->esc3_level_length= 0; - s->esc3_run_length= 0; - - return 0; -} - -int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size) -{ - int left= buf_size*8 - get_bits_count(&s->gb); - int length= s->msmpeg4_version>=3 ? 17 : 16; - /* the alt_bitstream reader could read over the end so we need to check it */ - if(left>=length && leftgb, 5); /* fps */ - s->bit_rate= get_bits(&s->gb, 11)*1024; - if(s->msmpeg4_version>=3) - s->flipflop_rounding= get_bits1(&s->gb); - else - s->flipflop_rounding= 0; - -// printf("fps:%2d bps:%2d roundingType:%1d\n", fps, s->bit_rate/1024, s->flipflop_rounding); - } - else if(leftflipflop_rounding= 0; - if(s->msmpeg4_version != 2) - av_log(s->avctx, AV_LOG_ERROR, "ext header missing, %d left\n", left); - } - else - { - av_log(s->avctx, AV_LOG_ERROR, "I frame too long, ignoring ext header\n"); - } - - return 0; -} - -static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) -{ - int level, pred; - - if(s->msmpeg4_version<=2){ - if (n < 4) { - level = get_vlc2(&s->gb, v2_dc_lum_vlc.table, DC_VLC_BITS, 3); - } else { - level = get_vlc2(&s->gb, v2_dc_chroma_vlc.table, DC_VLC_BITS, 3); - } - if (level < 0) - return -1; - level-=256; - }else{ //FIXME optimize use unified tables & index - if (n < 4) { - level = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3); - } else { - level = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3); - } - if (level < 0){ - av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n"); - return -1; - } - - if (level == DC_MAX) { - level = get_bits(&s->gb, 8); - if (get_bits1(&s->gb)) - level = -level; - } else if (level != 0) { - if (get_bits1(&s->gb)) - level = -level; - } - } - - if(s->msmpeg4_version==1){ - int32_t *dc_val; - pred = msmpeg4v1_pred_dc(s, n, &dc_val); - level += pred; - - /* update predictor */ - *dc_val= level; - }else{ - int16_t *dc_val; - pred = msmpeg4_pred_dc(s, n, &dc_val, dir_ptr); - level += pred; - - /* update predictor */ - if (n < 4) { - *dc_val = level * s->y_dc_scale; - } else { - *dc_val = level * s->c_dc_scale; - } - } - - return level; -} - -//#define ERROR_DETAILS -int ff_msmpeg4_decode_block(MpegEncContext * s, DCTELEM * block, - int n, int coded, const uint8_t *scan_table) -{ - int level, i, last, run, run_diff; - int av_uninit(dc_pred_dir); - RLTable *rl; - RL_VLC_ELEM *rl_vlc; - int qmul, qadd; - - if (s->mb_intra) { - qmul=1; - qadd=0; - - /* DC coef */ - level = msmpeg4_decode_dc(s, n, &dc_pred_dir); - - if (level < 0){ - av_log(s->avctx, AV_LOG_ERROR, "dc overflow- block: %d qscale: %d//\n", n, s->qscale); - if(s->inter_intra_pred) level=0; - else return -1; - } - if (n < 4) { - rl = &rl_table[s->rl_table_index]; - if(level > 256*s->y_dc_scale){ - av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ L qscale: %d//\n", s->qscale); - if(!s->inter_intra_pred) return -1; - } - } else { - rl = &rl_table[3 + s->rl_chroma_table_index]; - if(level > 256*s->c_dc_scale){ - av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ C qscale: %d//\n", s->qscale); - if(!s->inter_intra_pred) return -1; - } - } - block[0] = level; - - run_diff = s->msmpeg4_version >= 4; - i = 0; - if (!coded) { - goto not_coded; - } - if (s->ac_pred) { - if (dc_pred_dir == 0) - scan_table = s->intra_v_scantable.permutated; /* left */ - else - scan_table = s->intra_h_scantable.permutated; /* top */ - } else { - scan_table = s->intra_scantable.permutated; - } - rl_vlc= rl->rl_vlc[0]; - } else { - qmul = s->qscale << 1; - qadd = (s->qscale - 1) | 1; - i = -1; - rl = &rl_table[3 + s->rl_table_index]; - - if(s->msmpeg4_version==2) - run_diff = 0; - else - run_diff = 1; - - if (!coded) { - s->block_last_index[n] = i; - return 0; - } - if(!scan_table) - scan_table = s->inter_scantable.permutated; - rl_vlc= rl->rl_vlc[s->qscale]; - } - { - OPEN_READER(re, &s->gb); - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0); - if (level==0) { - int cache; - cache= GET_CACHE(re, &s->gb); - /* escape */ - if (s->msmpeg4_version==1 || (cache&0x80000000)==0) { - if (s->msmpeg4_version==1 || (cache&0x40000000)==0) { - /* third escape */ - if(s->msmpeg4_version!=1) LAST_SKIP_BITS(re, &s->gb, 2); - UPDATE_CACHE(re, &s->gb); - if(s->msmpeg4_version<=3){ - last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); - run= SHOW_UBITS(re, &s->gb, 6); SKIP_CACHE(re, &s->gb, 6); - level= SHOW_SBITS(re, &s->gb, 8); LAST_SKIP_CACHE(re, &s->gb, 8); - SKIP_COUNTER(re, &s->gb, 1+6+8); - }else{ - int sign; - last= SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1); - if(!s->esc3_level_length){ - int ll; - //printf("ESC-3 %X at %d %d\n", show_bits(&s->gb, 24), s->mb_x, s->mb_y); - if(s->qscale<8){ - ll= SHOW_UBITS(re, &s->gb, 3); SKIP_BITS(re, &s->gb, 3); - if(ll==0){ - ll= 8+SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1); - } - }else{ - ll=2; - while(ll<8 && SHOW_UBITS(re, &s->gb, 1)==0){ - ll++; - SKIP_BITS(re, &s->gb, 1); - } - if(ll<8) SKIP_BITS(re, &s->gb, 1); - } - - s->esc3_level_length= ll; - s->esc3_run_length= SHOW_UBITS(re, &s->gb, 2) + 3; SKIP_BITS(re, &s->gb, 2); -//printf("level length:%d, run length: %d\n", ll, s->esc3_run_length); - UPDATE_CACHE(re, &s->gb); - } - run= SHOW_UBITS(re, &s->gb, s->esc3_run_length); - SKIP_BITS(re, &s->gb, s->esc3_run_length); - - sign= SHOW_UBITS(re, &s->gb, 1); - SKIP_BITS(re, &s->gb, 1); - - level= SHOW_UBITS(re, &s->gb, s->esc3_level_length); - SKIP_BITS(re, &s->gb, s->esc3_level_length); - if(sign) level= -level; - } -//printf("level: %d, run: %d at %d %d\n", level, run, s->mb_x, s->mb_y); -#if 0 // waste of time / this will detect very few errors - { - const int abs_level= FFABS(level); - const int run1= run - rl->max_run[last][abs_level] - run_diff; - if(abs_level<=MAX_LEVEL && run<=MAX_RUN){ - if(abs_level <= rl->max_level[last][run]){ - av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n"); - return DECODING_AC_LOST; - } - if(abs_level <= rl->max_level[last][run]*2){ - av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n"); - return DECODING_AC_LOST; - } - if(run1>=0 && abs_level <= rl->max_level[last][run1]){ - av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n"); - return DECODING_AC_LOST; - } - } - } -#endif - //level = level * qmul + (level>0) * qadd - (level<=0) * qadd ; - if (level>0) level= level * qmul + qadd; - else level= level * qmul - qadd; -#if 0 // waste of time too :( - if(level>2048 || level<-2048){ - av_log(s->avctx, AV_LOG_ERROR, "|level| overflow in 3. esc\n"); - return DECODING_AC_LOST; - } -#endif - i+= run + 1; - if(last) i+=192; -#ifdef ERROR_DETAILS - if(run==66) - av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC3 level=%d\n", level); - else if((i>62 && i<192) || i>192+63) - av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC3 i=%d run=%d level=%d\n", i, run, level); -#endif - } else { - /* second escape */ - SKIP_BITS(re, &s->gb, 2); - GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); - i+= run + rl->max_run[run>>7][level/qmul] + run_diff; //FIXME opt indexing - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); -#ifdef ERROR_DETAILS - if(run==66) - av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC2 level=%d\n", level); - else if((i>62 && i<192) || i>192+63) - av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC2 i=%d run=%d level=%d\n", i, run, level); -#endif - } - } else { - /* first escape */ - SKIP_BITS(re, &s->gb, 1); - GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); - i+= run; - level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); -#ifdef ERROR_DETAILS - if(run==66) - av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC1 level=%d\n", level); - else if((i>62 && i<192) || i>192+63) - av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC1 i=%d run=%d level=%d\n", i, run, level); -#endif - } - } else { - i+= run; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); -#ifdef ERROR_DETAILS - if(run==66) - av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code level=%d\n", level); - else if((i>62 && i<192) || i>192+63) - av_log(s->avctx, AV_LOG_ERROR, "run overflow i=%d run=%d level=%d\n", i, run, level); -#endif - } - if (i > 62){ - i-= 192; - if(i&(~63)){ - const int left= get_bits_left(&s->gb); - if(((i+192 == 64 && level/qmul==-1) || s->error_recognition<=1) && left>=0){ - av_log(s->avctx, AV_LOG_ERROR, "ignoring overflow at %d %d\n", s->mb_x, s->mb_y); - break; - }else{ - av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - } - - block[scan_table[i]] = level; - break; - } - - block[scan_table[i]] = level; - } - CLOSE_READER(re, &s->gb); - } - not_coded: - if (s->mb_intra) { - mpeg4_pred_ac(s, block, n, dc_pred_dir); - if (s->ac_pred) { - i = 63; /* XXX: not optimal */ - } - } - if(s->msmpeg4_version>=4 && i>0) i=63; //FIXME/XXX optimize - s->block_last_index[n] = i; - - return 0; -} - -int ff_msmpeg4_decode_motion(MpegEncContext * s, - int *mx_ptr, int *my_ptr) -{ - MVTable *mv; - int code, mx, my; - - mv = &mv_tables[s->mv_table_index]; - - code = get_vlc2(&s->gb, mv->vlc.table, MV_VLC_BITS, 2); - if (code < 0){ - av_log(s->avctx, AV_LOG_ERROR, "illegal MV code at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - if (code == mv->n) { -//printf("MV ESC %X at %d %d\n", show_bits(&s->gb, 24), s->mb_x, s->mb_y); - mx = get_bits(&s->gb, 6); - my = get_bits(&s->gb, 6); - } else { - mx = mv->table_mvx[code]; - my = mv->table_mvy[code]; - } - - mx += *mx_ptr - 32; - my += *my_ptr - 32; - /* WARNING : they do not do exactly modulo encoding */ - if (mx <= -64) - mx += 64; - else if (mx >= 64) - mx -= 64; - - if (my <= -64) - my += 64; - else if (my >= 64) - my -= 64; - *mx_ptr = mx; - *my_ptr = my; - return 0; -} - -AVCodec ff_msmpeg4v1_decoder = { - .name = "msmpeg4v1", - .type = AVMEDIA_TYPE_VIDEO, - .id = CODEC_ID_MSMPEG4V1, - .priv_data_size = sizeof(MpegEncContext), - .init = ff_msmpeg4_decode_init, - .close = ff_h263_decode_end, - .decode = ff_h263_decode_frame, - .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, - .max_lowres= 3, - .long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 1"), - .pix_fmts= ff_pixfmt_list_420, -}; - -AVCodec ff_msmpeg4v2_decoder = { - .name = "msmpeg4v2", - .type = AVMEDIA_TYPE_VIDEO, - .id = CODEC_ID_MSMPEG4V2, - .priv_data_size = sizeof(MpegEncContext), - .init = ff_msmpeg4_decode_init, - .close = ff_h263_decode_end, - .decode = ff_h263_decode_frame, - .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, - .max_lowres= 3, - .long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 2"), - .pix_fmts= ff_pixfmt_list_420, -}; - -AVCodec ff_msmpeg4v3_decoder = { - .name = "msmpeg4", - .type = AVMEDIA_TYPE_VIDEO, - .id = CODEC_ID_MSMPEG4V3, - .priv_data_size = sizeof(MpegEncContext), - .init = ff_msmpeg4_decode_init, - .close = ff_h263_decode_end, - .decode = ff_h263_decode_frame, - .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, - .max_lowres= 3, - .long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 3"), - .pix_fmts= ff_pixfmt_list_420, -}; - -AVCodec ff_wmv1_decoder = { - .name = "wmv1", - .type = AVMEDIA_TYPE_VIDEO, - .id = CODEC_ID_WMV1, - .priv_data_size = sizeof(MpegEncContext), - .init = ff_msmpeg4_decode_init, - .close = ff_h263_decode_end, - .decode = ff_h263_decode_frame, - .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, - .max_lowres= 3, - .long_name= NULL_IF_CONFIG_SMALL("Windows Media Video 7"), - .pix_fmts= ff_pixfmt_list_420, -};