00001 /* 00002 * MPEG1/2 encoder 00003 * Copyright (c) 2000,2001 Fabrice Bellard 00004 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> 00005 * 00006 * This file is part of FFmpeg. 00007 * 00008 * FFmpeg is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * FFmpeg is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with FFmpeg; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00028 #include "avcodec.h" 00029 #include "dsputil.h" 00030 #include "mathops.h" 00031 #include "mpegvideo.h" 00032 00033 #include "mpeg12.h" 00034 #include "mpeg12data.h" 00035 #include "bytestream.h" 00036 #include "timecode.h" 00037 #include "libavutil/log.h" 00038 #include "libavutil/opt.h" 00039 #include "libavutil/avassert.h" 00040 00041 static const uint8_t inv_non_linear_qscale[13] = { 00042 0, 2, 4, 6, 8, 00043 9,10,11,12,13,14,15,16, 00044 }; 00045 00046 static const uint8_t svcd_scan_offset_placeholder[14] = { 00047 0x10, 0x0E, 00048 0x00, 0x80, 0x81, 00049 0x00, 0x80, 0x81, 00050 0xff, 0xff, 0xff, 00051 0xff, 0xff, 0xff, 00052 }; 00053 00054 static void mpeg1_encode_block(MpegEncContext *s, 00055 DCTELEM *block, 00056 int component); 00057 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added 00058 00059 static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1]; 00060 static uint8_t fcode_tab[MAX_MV*2+1]; 00061 00062 static uint8_t uni_mpeg1_ac_vlc_len [64*64*2]; 00063 static uint8_t uni_mpeg2_ac_vlc_len [64*64*2]; 00064 00065 /* simple include everything table for dc, first byte is bits number next 3 are code*/ 00066 static uint32_t mpeg1_lum_dc_uni[512]; 00067 static uint32_t mpeg1_chr_dc_uni[512]; 00068 00069 static uint8_t mpeg1_index_run[2][64]; 00070 static int8_t mpeg1_max_level[2][64]; 00071 00072 static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){ 00073 int i; 00074 00075 for(i=0; i<128; i++){ 00076 int level= i-64; 00077 int run; 00078 if (!level) 00079 continue; 00080 for(run=0; run<64; run++){ 00081 int len, code; 00082 00083 int alevel= FFABS(level); 00084 00085 if (alevel > rl->max_level[0][run]) 00086 code= 111; /*rl->n*/ 00087 else 00088 code= rl->index_run[0][run] + alevel - 1; 00089 00090 if (code < 111 /* rl->n */) { 00091 /* length of vlc and sign */ 00092 len= rl->table_vlc[code][1]+1; 00093 } else { 00094 len= rl->table_vlc[111/*rl->n*/][1]+6; 00095 00096 if (alevel < 128) { 00097 len += 8; 00098 } else { 00099 len += 16; 00100 } 00101 } 00102 00103 uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len; 00104 } 00105 } 00106 } 00107 00108 00109 static int find_frame_rate_index(MpegEncContext *s){ 00110 int i; 00111 int64_t dmin= INT64_MAX; 00112 int64_t d; 00113 00114 for(i=1;i<14;i++) { 00115 int64_t n0= 1001LL/avpriv_frame_rate_tab[i].den*avpriv_frame_rate_tab[i].num*s->avctx->time_base.num; 00116 int64_t n1= 1001LL*s->avctx->time_base.den; 00117 if(s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL && i>=9) break; 00118 00119 d = FFABS(n0 - n1); 00120 if(d < dmin){ 00121 dmin=d; 00122 s->frame_rate_index= i; 00123 } 00124 } 00125 if(dmin) 00126 return -1; 00127 else 00128 return 0; 00129 } 00130 00131 static av_cold int encode_init(AVCodecContext *avctx) 00132 { 00133 MpegEncContext *s = avctx->priv_data; 00134 00135 if(MPV_encode_init(avctx) < 0) 00136 return -1; 00137 00138 #if FF_API_MPEGVIDEO_GLOBAL_OPTS 00139 if (avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) 00140 s->drop_frame_timecode = 1; 00141 if (avctx->flags & CODEC_FLAG_SVCD_SCAN_OFFSET) 00142 s->scan_offset = 1; 00143 #endif 00144 00145 if(find_frame_rate_index(s) < 0){ 00146 if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){ 00147 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num); 00148 return -1; 00149 }else{ 00150 av_log(avctx, AV_LOG_INFO, "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n", avctx->time_base.den, avctx->time_base.num); 00151 } 00152 } 00153 00154 if(avctx->profile == FF_PROFILE_UNKNOWN){ 00155 if(avctx->level != FF_LEVEL_UNKNOWN){ 00156 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n"); 00157 return -1; 00158 } 00159 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */ 00160 } 00161 00162 if(avctx->level == FF_LEVEL_UNKNOWN){ 00163 if(avctx->profile == 0){ /* 4:2:2 */ 00164 if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */ 00165 else avctx->level = 2; /* High */ 00166 }else{ 00167 if(avctx->profile != 1 && s->chroma_format != CHROMA_420){ 00168 av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n"); 00169 return -1; 00170 } 00171 if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */ 00172 else if(avctx->width <= 1440) avctx->level = 6; /* High 1440 */ 00173 else avctx->level = 4; /* High */ 00174 } 00175 } 00176 00177 s->drop_frame_timecode = s->tc.drop = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE); 00178 if (s->drop_frame_timecode && s->frame_rate_index != 4) { 00179 av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n"); 00180 return -1; 00181 } 00182 00183 if (s->tc.str) { 00184 s->tc.rate = avpriv_frame_rate_tab[s->frame_rate_index]; 00185 if (avpriv_init_smpte_timecode(s, &s->tc) < 0) 00186 return -1; 00187 s->drop_frame_timecode = s->tc.drop; 00188 s->avctx->timecode_frame_start = s->tc.start; 00189 } else { 00190 s->avctx->timecode_frame_start = 0; // default is -1 00191 } 00192 return 0; 00193 } 00194 00195 static void put_header(MpegEncContext *s, int header) 00196 { 00197 avpriv_align_put_bits(&s->pb); 00198 put_bits(&s->pb, 16, header>>16); 00199 put_sbits(&s->pb, 16, header); 00200 } 00201 00202 /* put sequence header if needed */ 00203 static void mpeg1_encode_sequence_header(MpegEncContext *s) 00204 { 00205 unsigned int vbv_buffer_size; 00206 unsigned int fps, v; 00207 int i; 00208 uint64_t time_code; 00209 float best_aspect_error= 1E10; 00210 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio); 00211 int constraint_parameter_flag; 00212 00213 if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA) 00214 00215 if (s->current_picture.f.key_frame) { 00216 AVRational framerate= avpriv_frame_rate_tab[s->frame_rate_index]; 00217 00218 /* mpeg1 header repeated every gop */ 00219 put_header(s, SEQ_START_CODE); 00220 00221 put_sbits(&s->pb, 12, s->width ); 00222 put_sbits(&s->pb, 12, s->height); 00223 00224 for(i=1; i<15; i++){ 00225 float error= aspect_ratio; 00226 if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1) 00227 error-= 1.0/ff_mpeg1_aspect[i]; 00228 else 00229 error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width; 00230 00231 error= FFABS(error); 00232 00233 if(error < best_aspect_error){ 00234 best_aspect_error= error; 00235 s->aspect_ratio_info= i; 00236 } 00237 } 00238 00239 put_bits(&s->pb, 4, s->aspect_ratio_info); 00240 put_bits(&s->pb, 4, s->frame_rate_index); 00241 00242 if(s->avctx->rc_max_rate){ 00243 v = (s->avctx->rc_max_rate + 399) / 400; 00244 if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO) 00245 v = 0x3ffff; 00246 }else{ 00247 v= 0x3FFFF; 00248 } 00249 00250 if(s->avctx->rc_buffer_size) 00251 vbv_buffer_size = s->avctx->rc_buffer_size; 00252 else 00253 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */ 00254 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024; 00255 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384; 00256 00257 put_sbits(&s->pb, 18, v); 00258 put_bits(&s->pb, 1, 1); /* marker */ 00259 put_sbits(&s->pb, 10, vbv_buffer_size); 00260 00261 constraint_parameter_flag= 00262 s->width <= 768 && s->height <= 576 && 00263 s->mb_width * s->mb_height <= 396 && 00264 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 && 00265 framerate.num <= framerate.den*30 && 00266 s->avctx->me_range && s->avctx->me_range < 128 && 00267 vbv_buffer_size <= 20 && 00268 v <= 1856000/400 && 00269 s->codec_id == CODEC_ID_MPEG1VIDEO; 00270 00271 put_bits(&s->pb, 1, constraint_parameter_flag); 00272 00273 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); 00274 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); 00275 00276 if(s->codec_id == CODEC_ID_MPEG2VIDEO){ 00277 put_header(s, EXT_START_CODE); 00278 put_bits(&s->pb, 4, 1); //seq ext 00279 00280 put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */ 00281 00282 put_bits(&s->pb, 3, s->avctx->profile); //profile 00283 put_bits(&s->pb, 4, s->avctx->level); //level 00284 00285 put_bits(&s->pb, 1, s->progressive_sequence); 00286 put_bits(&s->pb, 2, s->chroma_format); 00287 put_bits(&s->pb, 2, s->width >>12); 00288 put_bits(&s->pb, 2, s->height>>12); 00289 put_bits(&s->pb, 12, v>>18); //bitrate ext 00290 put_bits(&s->pb, 1, 1); //marker 00291 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext 00292 put_bits(&s->pb, 1, s->low_delay); 00293 put_bits(&s->pb, 2, 0); // frame_rate_ext_n 00294 put_bits(&s->pb, 5, 0); // frame_rate_ext_d 00295 } 00296 00297 put_header(s, GOP_START_CODE); 00298 put_bits(&s->pb, 1, s->drop_frame_timecode); /* drop frame flag */ 00299 /* time code : we must convert from the real frame rate to a 00300 fake mpeg frame rate in case of low frame rate */ 00301 fps = (framerate.num + framerate.den/2)/ framerate.den; 00302 time_code = s->current_picture_ptr->f.coded_picture_number + s->avctx->timecode_frame_start; 00303 00304 s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number; 00305 av_assert0(s->drop_frame_timecode == s->tc.drop); 00306 if (s->tc.drop) 00307 time_code = avpriv_framenum_to_drop_timecode(time_code); 00308 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24)); 00309 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60)); 00310 put_bits(&s->pb, 1, 1); 00311 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60)); 00312 put_bits(&s->pb, 6, (uint32_t)((time_code % fps))); 00313 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP)); 00314 put_bits(&s->pb, 1, 0); /* broken link */ 00315 } 00316 } 00317 00318 static inline void encode_mb_skip_run(MpegEncContext *s, int run){ 00319 while (run >= 33) { 00320 put_bits(&s->pb, 11, 0x008); 00321 run -= 33; 00322 } 00323 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1], 00324 ff_mpeg12_mbAddrIncrTable[run][0]); 00325 } 00326 00327 static av_always_inline void put_qscale(MpegEncContext *s) 00328 { 00329 if(s->q_scale_type){ 00330 assert(s->qscale>=1 && s->qscale <=12); 00331 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]); 00332 }else{ 00333 put_bits(&s->pb, 5, s->qscale); 00334 } 00335 } 00336 00337 void ff_mpeg1_encode_slice_header(MpegEncContext *s){ 00338 if (s->height > 2800) { 00339 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127)); 00340 put_bits(&s->pb, 3, s->mb_y >> 7); /* slice_vertical_position_extension */ 00341 } else { 00342 put_header(s, SLICE_MIN_START_CODE + s->mb_y); 00343 } 00344 put_qscale(s); 00345 put_bits(&s->pb, 1, 0); /* slice extra information */ 00346 } 00347 00348 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number) 00349 { 00350 mpeg1_encode_sequence_header(s); 00351 00352 /* mpeg1 picture header */ 00353 put_header(s, PICTURE_START_CODE); 00354 /* temporal reference */ 00355 00356 // RAL: s->picture_number instead of s->fake_picture_number 00357 put_bits(&s->pb, 10, (s->picture_number - 00358 s->gop_picture_number) & 0x3ff); 00359 put_bits(&s->pb, 3, s->pict_type); 00360 00361 s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8; 00362 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */ 00363 00364 // RAL: Forward f_code also needed for B frames 00365 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) { 00366 put_bits(&s->pb, 1, 0); /* half pel coordinates */ 00367 if(s->codec_id == CODEC_ID_MPEG1VIDEO) 00368 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */ 00369 else 00370 put_bits(&s->pb, 3, 7); /* forward_f_code */ 00371 } 00372 00373 // RAL: Backward f_code necessary for B frames 00374 if (s->pict_type == AV_PICTURE_TYPE_B) { 00375 put_bits(&s->pb, 1, 0); /* half pel coordinates */ 00376 if(s->codec_id == CODEC_ID_MPEG1VIDEO) 00377 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */ 00378 else 00379 put_bits(&s->pb, 3, 7); /* backward_f_code */ 00380 } 00381 00382 put_bits(&s->pb, 1, 0); /* extra bit picture */ 00383 00384 s->frame_pred_frame_dct = 1; 00385 if(s->codec_id == CODEC_ID_MPEG2VIDEO){ 00386 put_header(s, EXT_START_CODE); 00387 put_bits(&s->pb, 4, 8); //pic ext 00388 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) { 00389 put_bits(&s->pb, 4, s->f_code); 00390 put_bits(&s->pb, 4, s->f_code); 00391 }else{ 00392 put_bits(&s->pb, 8, 255); 00393 } 00394 if (s->pict_type == AV_PICTURE_TYPE_B) { 00395 put_bits(&s->pb, 4, s->b_code); 00396 put_bits(&s->pb, 4, s->b_code); 00397 }else{ 00398 put_bits(&s->pb, 8, 255); 00399 } 00400 put_bits(&s->pb, 2, s->intra_dc_precision); 00401 00402 assert(s->picture_structure == PICT_FRAME); 00403 put_bits(&s->pb, 2, s->picture_structure); 00404 if (s->progressive_sequence) { 00405 put_bits(&s->pb, 1, 0); /* no repeat */ 00406 } else { 00407 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first); 00408 } 00409 /* XXX: optimize the generation of this flag with entropy 00410 measures */ 00411 s->frame_pred_frame_dct = s->progressive_sequence; 00412 00413 put_bits(&s->pb, 1, s->frame_pred_frame_dct); 00414 put_bits(&s->pb, 1, s->concealment_motion_vectors); 00415 put_bits(&s->pb, 1, s->q_scale_type); 00416 put_bits(&s->pb, 1, s->intra_vlc_format); 00417 put_bits(&s->pb, 1, s->alternate_scan); 00418 put_bits(&s->pb, 1, s->repeat_first_field); 00419 s->progressive_frame = s->progressive_sequence; 00420 put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */ 00421 put_bits(&s->pb, 1, s->progressive_frame); 00422 put_bits(&s->pb, 1, 0); //composite_display_flag 00423 } 00424 if (s->scan_offset) { 00425 int i; 00426 00427 put_header(s, USER_START_CODE); 00428 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){ 00429 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]); 00430 } 00431 } 00432 00433 s->mb_y=0; 00434 ff_mpeg1_encode_slice_header(s); 00435 } 00436 00437 static inline void put_mb_modes(MpegEncContext *s, int n, int bits, 00438 int has_mv, int field_motion) 00439 { 00440 put_bits(&s->pb, n, bits); 00441 if (!s->frame_pred_frame_dct) { 00442 if (has_mv) 00443 put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */ 00444 put_bits(&s->pb, 1, s->interlaced_dct); 00445 } 00446 } 00447 00448 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s, 00449 DCTELEM block[6][64], 00450 int motion_x, int motion_y, 00451 int mb_block_count) 00452 { 00453 int i, cbp; 00454 const int mb_x = s->mb_x; 00455 const int mb_y = s->mb_y; 00456 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y; 00457 00458 /* compute cbp */ 00459 cbp = 0; 00460 for(i=0;i<mb_block_count;i++) { 00461 if (s->block_last_index[i] >= 0) 00462 cbp |= 1 << (mb_block_count - 1 - i); 00463 } 00464 00465 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 && 00466 (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) && 00467 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) || 00468 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) | 00469 ((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) { 00470 s->mb_skip_run++; 00471 s->qscale -= s->dquant; 00472 s->skip_count++; 00473 s->misc_bits++; 00474 s->last_bits++; 00475 if(s->pict_type == AV_PICTURE_TYPE_P){ 00476 s->last_mv[0][1][0]= s->last_mv[0][0][0]= 00477 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0; 00478 } 00479 } else { 00480 if(first_mb){ 00481 assert(s->mb_skip_run == 0); 00482 encode_mb_skip_run(s, s->mb_x); 00483 }else{ 00484 encode_mb_skip_run(s, s->mb_skip_run); 00485 } 00486 00487 if (s->pict_type == AV_PICTURE_TYPE_I) { 00488 if(s->dquant && cbp){ 00489 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */ 00490 put_qscale(s); 00491 }else{ 00492 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */ 00493 s->qscale -= s->dquant; 00494 } 00495 s->misc_bits+= get_bits_diff(s); 00496 s->i_count++; 00497 } else if (s->mb_intra) { 00498 if(s->dquant && cbp){ 00499 put_mb_modes(s, 6, 0x01, 0, 0); 00500 put_qscale(s); 00501 }else{ 00502 put_mb_modes(s, 5, 0x03, 0, 0); 00503 s->qscale -= s->dquant; 00504 } 00505 s->misc_bits+= get_bits_diff(s); 00506 s->i_count++; 00507 memset(s->last_mv, 0, sizeof(s->last_mv)); 00508 } else if (s->pict_type == AV_PICTURE_TYPE_P) { 00509 if(s->mv_type == MV_TYPE_16X16){ 00510 if (cbp != 0) { 00511 if ((motion_x|motion_y) == 0) { 00512 if(s->dquant){ 00513 put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */ 00514 put_qscale(s); 00515 }else{ 00516 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */ 00517 } 00518 s->misc_bits+= get_bits_diff(s); 00519 } else { 00520 if(s->dquant){ 00521 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */ 00522 put_qscale(s); 00523 }else{ 00524 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */ 00525 } 00526 s->misc_bits+= get_bits_diff(s); 00527 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added 00528 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added 00529 s->mv_bits+= get_bits_diff(s); 00530 } 00531 } else { 00532 put_bits(&s->pb, 3, 1); /* motion only */ 00533 if (!s->frame_pred_frame_dct) 00534 put_bits(&s->pb, 2, 2); /* motion_type: frame */ 00535 s->misc_bits+= get_bits_diff(s); 00536 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added 00537 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added 00538 s->qscale -= s->dquant; 00539 s->mv_bits+= get_bits_diff(s); 00540 } 00541 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x; 00542 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y; 00543 }else{ 00544 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD); 00545 00546 if (cbp) { 00547 if(s->dquant){ 00548 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */ 00549 put_qscale(s); 00550 }else{ 00551 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */ 00552 } 00553 } else { 00554 put_bits(&s->pb, 3, 1); /* motion only */ 00555 put_bits(&s->pb, 2, 1); /* motion_type: field */ 00556 s->qscale -= s->dquant; 00557 } 00558 s->misc_bits+= get_bits_diff(s); 00559 for(i=0; i<2; i++){ 00560 put_bits(&s->pb, 1, s->field_select[0][i]); 00561 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code); 00562 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code); 00563 s->last_mv[0][i][0]= s->mv[0][i][0]; 00564 s->last_mv[0][i][1]= 2*s->mv[0][i][1]; 00565 } 00566 s->mv_bits+= get_bits_diff(s); 00567 } 00568 if(cbp) { 00569 if (s->chroma_y_shift) { 00570 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]); 00571 } else { 00572 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]); 00573 put_sbits(&s->pb, 2, cbp); 00574 } 00575 } 00576 s->f_count++; 00577 } else{ 00578 if(s->mv_type == MV_TYPE_16X16){ 00579 if (cbp){ // With coded bloc pattern 00580 if (s->dquant) { 00581 if(s->mv_dir == MV_DIR_FORWARD) 00582 put_mb_modes(s, 6, 3, 1, 0); 00583 else 00584 put_mb_modes(s, 8-s->mv_dir, 2, 1, 0); 00585 put_qscale(s); 00586 } else { 00587 put_mb_modes(s, 5-s->mv_dir, 3, 1, 0); 00588 } 00589 }else{ // No coded bloc pattern 00590 put_bits(&s->pb, 5-s->mv_dir, 2); 00591 if (!s->frame_pred_frame_dct) 00592 put_bits(&s->pb, 2, 2); /* motion_type: frame */ 00593 s->qscale -= s->dquant; 00594 } 00595 s->misc_bits += get_bits_diff(s); 00596 if (s->mv_dir&MV_DIR_FORWARD){ 00597 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code); 00598 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code); 00599 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0]; 00600 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1]; 00601 s->f_count++; 00602 } 00603 if (s->mv_dir&MV_DIR_BACKWARD){ 00604 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code); 00605 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code); 00606 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0]; 00607 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1]; 00608 s->b_count++; 00609 } 00610 }else{ 00611 assert(s->mv_type == MV_TYPE_FIELD); 00612 assert(!s->frame_pred_frame_dct); 00613 if (cbp){ // With coded bloc pattern 00614 if (s->dquant) { 00615 if(s->mv_dir == MV_DIR_FORWARD) 00616 put_mb_modes(s, 6, 3, 1, 1); 00617 else 00618 put_mb_modes(s, 8-s->mv_dir, 2, 1, 1); 00619 put_qscale(s); 00620 } else { 00621 put_mb_modes(s, 5-s->mv_dir, 3, 1, 1); 00622 } 00623 }else{ // No coded bloc pattern 00624 put_bits(&s->pb, 5-s->mv_dir, 2); 00625 put_bits(&s->pb, 2, 1); /* motion_type: field */ 00626 s->qscale -= s->dquant; 00627 } 00628 s->misc_bits += get_bits_diff(s); 00629 if (s->mv_dir&MV_DIR_FORWARD){ 00630 for(i=0; i<2; i++){ 00631 put_bits(&s->pb, 1, s->field_select[0][i]); 00632 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code); 00633 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code); 00634 s->last_mv[0][i][0]= s->mv[0][i][0]; 00635 s->last_mv[0][i][1]= 2*s->mv[0][i][1]; 00636 } 00637 s->f_count++; 00638 } 00639 if (s->mv_dir&MV_DIR_BACKWARD){ 00640 for(i=0; i<2; i++){ 00641 put_bits(&s->pb, 1, s->field_select[1][i]); 00642 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code); 00643 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code); 00644 s->last_mv[1][i][0]= s->mv[1][i][0]; 00645 s->last_mv[1][i][1]= 2*s->mv[1][i][1]; 00646 } 00647 s->b_count++; 00648 } 00649 } 00650 s->mv_bits += get_bits_diff(s); 00651 if(cbp) { 00652 if (s->chroma_y_shift) { 00653 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]); 00654 } else { 00655 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]); 00656 put_sbits(&s->pb, 2, cbp); 00657 } 00658 } 00659 } 00660 for(i=0;i<mb_block_count;i++) { 00661 if (cbp & (1 << (mb_block_count - 1 - i))) { 00662 mpeg1_encode_block(s, block[i], i); 00663 } 00664 } 00665 s->mb_skip_run = 0; 00666 if(s->mb_intra) 00667 s->i_tex_bits+= get_bits_diff(s); 00668 else 00669 s->p_tex_bits+= get_bits_diff(s); 00670 } 00671 } 00672 00673 void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y) 00674 { 00675 if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6); 00676 else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8); 00677 } 00678 00679 // RAL: Parameter added: f_or_b_code 00680 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code) 00681 { 00682 if (val == 0) { 00683 /* zero vector */ 00684 put_bits(&s->pb, 00685 ff_mpeg12_mbMotionVectorTable[0][1], 00686 ff_mpeg12_mbMotionVectorTable[0][0]); 00687 } else { 00688 int code, sign, bits; 00689 int bit_size = f_or_b_code - 1; 00690 int range = 1 << bit_size; 00691 /* modulo encoding */ 00692 val = sign_extend(val, 5 + bit_size); 00693 00694 if (val >= 0) { 00695 val--; 00696 code = (val >> bit_size) + 1; 00697 bits = val & (range - 1); 00698 sign = 0; 00699 } else { 00700 val = -val; 00701 val--; 00702 code = (val >> bit_size) + 1; 00703 bits = val & (range - 1); 00704 sign = 1; 00705 } 00706 00707 assert(code > 0 && code <= 16); 00708 00709 put_bits(&s->pb, 00710 ff_mpeg12_mbMotionVectorTable[code][1], 00711 ff_mpeg12_mbMotionVectorTable[code][0]); 00712 00713 put_bits(&s->pb, 1, sign); 00714 if (bit_size > 0) { 00715 put_bits(&s->pb, bit_size, bits); 00716 } 00717 } 00718 } 00719 00720 void ff_mpeg1_encode_init(MpegEncContext *s) 00721 { 00722 static int done=0; 00723 00724 ff_mpeg12_common_init(s); 00725 00726 if(!done){ 00727 int f_code; 00728 int mv; 00729 int i; 00730 00731 done=1; 00732 ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]); 00733 ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]); 00734 00735 for(i=0; i<64; i++) 00736 { 00737 mpeg1_max_level[0][i]= ff_rl_mpeg1.max_level[0][i]; 00738 mpeg1_index_run[0][i]= ff_rl_mpeg1.index_run[0][i]; 00739 } 00740 00741 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len); 00742 if(s->intra_vlc_format) 00743 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len); 00744 00745 /* build unified dc encoding tables */ 00746 for(i=-255; i<256; i++) 00747 { 00748 int adiff, index; 00749 int bits, code; 00750 int diff=i; 00751 00752 adiff = FFABS(diff); 00753 if(diff<0) diff--; 00754 index = av_log2(2*adiff); 00755 00756 bits= ff_mpeg12_vlc_dc_lum_bits[index] + index; 00757 code= (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)); 00758 mpeg1_lum_dc_uni[i+255]= bits + (code<<8); 00759 00760 bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index; 00761 code= (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)); 00762 mpeg1_chr_dc_uni[i+255]= bits + (code<<8); 00763 } 00764 00765 for(f_code=1; f_code<=MAX_FCODE; f_code++){ 00766 for(mv=-MAX_MV; mv<=MAX_MV; mv++){ 00767 int len; 00768 00769 if(mv==0) len= ff_mpeg12_mbMotionVectorTable[0][1]; 00770 else{ 00771 int val, bit_size, code; 00772 00773 bit_size = f_code - 1; 00774 00775 val=mv; 00776 if (val < 0) 00777 val = -val; 00778 val--; 00779 code = (val >> bit_size) + 1; 00780 if(code<17){ 00781 len= ff_mpeg12_mbMotionVectorTable[code][1] + 1 + bit_size; 00782 }else{ 00783 len= ff_mpeg12_mbMotionVectorTable[16][1] + 2 + bit_size; 00784 } 00785 } 00786 00787 mv_penalty[f_code][mv+MAX_MV]= len; 00788 } 00789 } 00790 00791 00792 for(f_code=MAX_FCODE; f_code>0; f_code--){ 00793 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){ 00794 fcode_tab[mv+MAX_MV]= f_code; 00795 } 00796 } 00797 } 00798 s->me.mv_penalty= mv_penalty; 00799 s->fcode_tab= fcode_tab; 00800 if(s->codec_id == CODEC_ID_MPEG1VIDEO){ 00801 s->min_qcoeff=-255; 00802 s->max_qcoeff= 255; 00803 }else{ 00804 s->min_qcoeff=-2047; 00805 s->max_qcoeff= 2047; 00806 } 00807 if (s->intra_vlc_format) { 00808 s->intra_ac_vlc_length= 00809 s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len; 00810 } else { 00811 s->intra_ac_vlc_length= 00812 s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len; 00813 } 00814 s->inter_ac_vlc_length= 00815 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len; 00816 } 00817 00818 static inline void encode_dc(MpegEncContext *s, int diff, int component) 00819 { 00820 if(((unsigned) (diff+255)) >= 511){ 00821 int index; 00822 00823 if(diff<0){ 00824 index= av_log2_16bit(-2*diff); 00825 diff--; 00826 }else{ 00827 index= av_log2_16bit(2*diff); 00828 } 00829 if (component == 0) { 00830 put_bits( 00831 &s->pb, 00832 ff_mpeg12_vlc_dc_lum_bits[index] + index, 00833 (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1))); 00834 }else{ 00835 put_bits( 00836 &s->pb, 00837 ff_mpeg12_vlc_dc_chroma_bits[index] + index, 00838 (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1))); 00839 } 00840 }else{ 00841 if (component == 0) { 00842 put_bits( 00843 &s->pb, 00844 mpeg1_lum_dc_uni[diff+255]&0xFF, 00845 mpeg1_lum_dc_uni[diff+255]>>8); 00846 } else { 00847 put_bits( 00848 &s->pb, 00849 mpeg1_chr_dc_uni[diff+255]&0xFF, 00850 mpeg1_chr_dc_uni[diff+255]>>8); 00851 } 00852 } 00853 } 00854 00855 static void mpeg1_encode_block(MpegEncContext *s, 00856 DCTELEM *block, 00857 int n) 00858 { 00859 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign; 00860 int code, component; 00861 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc; 00862 00863 last_index = s->block_last_index[n]; 00864 00865 /* DC coef */ 00866 if (s->mb_intra) { 00867 component = (n <= 3 ? 0 : (n&1) + 1); 00868 dc = block[0]; /* overflow is impossible */ 00869 diff = dc - s->last_dc[component]; 00870 encode_dc(s, diff, component); 00871 s->last_dc[component] = dc; 00872 i = 1; 00873 if (s->intra_vlc_format) 00874 table_vlc = ff_rl_mpeg2.table_vlc; 00875 } else { 00876 /* encode the first coefficient : needs to be done here because 00877 it is handled slightly differently */ 00878 level = block[0]; 00879 if (abs(level) == 1) { 00880 code = ((uint32_t)level >> 31); /* the sign bit */ 00881 put_bits(&s->pb, 2, code | 0x02); 00882 i = 1; 00883 } else { 00884 i = 0; 00885 last_non_zero = -1; 00886 goto next_coef; 00887 } 00888 } 00889 00890 /* now quantify & encode AC coefs */ 00891 last_non_zero = i - 1; 00892 00893 for(;i<=last_index;i++) { 00894 j = s->intra_scantable.permutated[i]; 00895 level = block[j]; 00896 next_coef: 00897 /* encode using VLC */ 00898 if (level != 0) { 00899 run = i - last_non_zero - 1; 00900 00901 alevel= level; 00902 MASK_ABS(sign, alevel) 00903 sign&=1; 00904 00905 if (alevel <= mpeg1_max_level[0][run]){ 00906 code= mpeg1_index_run[0][run] + alevel - 1; 00907 /* store the vlc & sign at once */ 00908 put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign); 00909 } else { 00910 /* escape seems to be pretty rare <5% so I do not optimize it */ 00911 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]); 00912 /* escape: only clip in this case */ 00913 put_bits(&s->pb, 6, run); 00914 if(s->codec_id == CODEC_ID_MPEG1VIDEO){ 00915 if (alevel < 128) { 00916 put_sbits(&s->pb, 8, level); 00917 } else { 00918 if (level < 0) { 00919 put_bits(&s->pb, 16, 0x8001 + level + 255); 00920 } else { 00921 put_sbits(&s->pb, 16, level); 00922 } 00923 } 00924 }else{ 00925 put_sbits(&s->pb, 12, level); 00926 } 00927 } 00928 last_non_zero = i; 00929 } 00930 } 00931 /* end of block */ 00932 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]); 00933 } 00934 00935 #define OFFSET(x) offsetof(MpegEncContext, x) 00936 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM 00937 #define COMMON_OPTS\ 00938 {TIMECODE_OPT(MpegEncContext,\ 00939 AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)},\ 00940 { "intra_vlc", "Use MPEG-2 intra VLC table.", OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },\ 00941 { "drop_frame_timecode", "Timecode is in drop frame format.", OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE}, \ 00942 { "scan_offset", "Reserve space for SVCD scan offset user data.", OFFSET(scan_offset), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE }, 00943 00944 static const AVOption mpeg1_options[] = { 00945 COMMON_OPTS 00946 { NULL }, 00947 }; 00948 00949 static const AVOption mpeg2_options[] = { 00950 COMMON_OPTS 00951 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE }, 00952 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE }, 00953 { NULL }, 00954 }; 00955 00956 #define mpeg12_class(x)\ 00957 static const AVClass mpeg## x ##_class = {\ 00958 .class_name = "mpeg" #x "video encoder",\ 00959 .item_name = av_default_item_name,\ 00960 .option = mpeg## x ##_options,\ 00961 .version = LIBAVUTIL_VERSION_INT,\ 00962 }; 00963 00964 mpeg12_class(1) 00965 mpeg12_class(2) 00966 00967 AVCodec ff_mpeg1video_encoder = { 00968 .name = "mpeg1video", 00969 .type = AVMEDIA_TYPE_VIDEO, 00970 .id = CODEC_ID_MPEG1VIDEO, 00971 .priv_data_size = sizeof(MpegEncContext), 00972 .init = encode_init, 00973 .encode = MPV_encode_picture, 00974 .close = MPV_encode_end, 00975 .supported_framerates= avpriv_frame_rate_tab+1, 00976 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE}, 00977 .capabilities= CODEC_CAP_DELAY, 00978 .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"), 00979 .priv_class = &mpeg1_class, 00980 }; 00981 00982 AVCodec ff_mpeg2video_encoder = { 00983 .name = "mpeg2video", 00984 .type = AVMEDIA_TYPE_VIDEO, 00985 .id = CODEC_ID_MPEG2VIDEO, 00986 .priv_data_size = sizeof(MpegEncContext), 00987 .init = encode_init, 00988 .encode = MPV_encode_picture, 00989 .close = MPV_encode_end, 00990 .supported_framerates= avpriv_frame_rate_tab+1, 00991 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE}, 00992 .capabilities= CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS, 00993 .long_name= NULL_IF_CONFIG_SMALL("MPEG-2 video"), 00994 .priv_class = &mpeg2_class, 00995 };