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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 "libavutil/log.h"
00037 #include "libavutil/opt.h"
00038 #include "libavutil/avassert.h"
00039 #include "libavutil/timecode.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);
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
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;
00087 else
00088 code= rl->index_run[0][run] + alevel - 1;
00089
00090 if (code < 111 /* rl->n */) {
00091
00092 len= rl->table_vlc[code][1]+1;
00093 } else {
00094 len= rl->table_vlc[111][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 AVRational bestq= (AVRational){0, 0};
00112 AVRational ext;
00113 AVRational target = av_inv_q(s->avctx->time_base);
00114
00115 for(i=1;i<14;i++) {
00116 if(s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL && i>=9) break;
00117
00118 for (ext.num=1; ext.num <= 4; ext.num++) {
00119 for (ext.den=1; ext.den <= 32; ext.den++) {
00120 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
00121
00122 if(s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
00123 continue;
00124 if(av_gcd(ext.den, ext.num) != 1)
00125 continue;
00126
00127 if( bestq.num==0
00128 || av_nearer_q(target, bestq, q) < 0
00129 || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0){
00130 bestq = q;
00131 s->frame_rate_index= i;
00132 s->mpeg2_frame_rate_ext.num = ext.num;
00133 s->mpeg2_frame_rate_ext.den = ext.den;
00134 }
00135 }
00136 }
00137 }
00138 if(av_cmp_q(target, bestq))
00139 return -1;
00140 else
00141 return 0;
00142 }
00143
00144 static av_cold int encode_init(AVCodecContext *avctx)
00145 {
00146 MpegEncContext *s = avctx->priv_data;
00147
00148 if(ff_MPV_encode_init(avctx) < 0)
00149 return -1;
00150
00151 if(find_frame_rate_index(s) < 0){
00152 if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
00153 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
00154 return -1;
00155 }else{
00156 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);
00157 }
00158 }
00159
00160 if(avctx->profile == FF_PROFILE_UNKNOWN){
00161 if(avctx->level != FF_LEVEL_UNKNOWN){
00162 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
00163 return -1;
00164 }
00165 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
00166 }
00167
00168 if(avctx->level == FF_LEVEL_UNKNOWN){
00169 if(avctx->profile == 0){
00170 if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5;
00171 else avctx->level = 2;
00172 }else{
00173 if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
00174 av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
00175 return -1;
00176 }
00177 if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8;
00178 else if(avctx->width <= 1440) avctx->level = 6;
00179 else avctx->level = 4;
00180 }
00181 }
00182
00183 s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
00184 if (s->drop_frame_timecode)
00185 s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
00186 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
00187 av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
00188 return -1;
00189 }
00190
00191 if (s->tc_opt_str) {
00192 AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
00193 int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
00194 if (ret < 0)
00195 return ret;
00196 s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
00197 s->avctx->timecode_frame_start = s->tc.start;
00198 } else {
00199 s->avctx->timecode_frame_start = 0;
00200 }
00201 return 0;
00202 }
00203
00204 static void put_header(MpegEncContext *s, int header)
00205 {
00206 avpriv_align_put_bits(&s->pb);
00207 put_bits(&s->pb, 16, header>>16);
00208 put_sbits(&s->pb, 16, header);
00209 }
00210
00211
00212 static void mpeg1_encode_sequence_header(MpegEncContext *s)
00213 {
00214 unsigned int vbv_buffer_size;
00215 unsigned int fps, v;
00216 int i;
00217 uint64_t time_code;
00218 float best_aspect_error= 1E10;
00219 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
00220 int constraint_parameter_flag;
00221
00222 if(aspect_ratio==0.0) aspect_ratio= 1.0;
00223
00224 if (s->current_picture.f.key_frame) {
00225 AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
00226
00227
00228 put_header(s, SEQ_START_CODE);
00229
00230 put_sbits(&s->pb, 12, s->width );
00231 put_sbits(&s->pb, 12, s->height);
00232
00233 for(i=1; i<15; i++){
00234 float error= aspect_ratio;
00235 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <=1)
00236 error-= 1.0/ff_mpeg1_aspect[i];
00237 else
00238 error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width;
00239
00240 error= FFABS(error);
00241
00242 if(error < best_aspect_error){
00243 best_aspect_error= error;
00244 s->aspect_ratio_info= i;
00245 }
00246 }
00247
00248 put_bits(&s->pb, 4, s->aspect_ratio_info);
00249 put_bits(&s->pb, 4, s->frame_rate_index);
00250
00251 if(s->avctx->rc_max_rate){
00252 v = (s->avctx->rc_max_rate + 399) / 400;
00253 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
00254 v = 0x3ffff;
00255 }else{
00256 v= 0x3FFFF;
00257 }
00258
00259 if(s->avctx->rc_buffer_size)
00260 vbv_buffer_size = s->avctx->rc_buffer_size;
00261 else
00262
00263 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
00264 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
00265
00266 put_sbits(&s->pb, 18, v);
00267 put_bits(&s->pb, 1, 1);
00268 put_sbits(&s->pb, 10, vbv_buffer_size);
00269
00270 constraint_parameter_flag=
00271 s->width <= 768 && s->height <= 576 &&
00272 s->mb_width * s->mb_height <= 396 &&
00273 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
00274 framerate.num <= framerate.den*30 &&
00275 s->avctx->me_range && s->avctx->me_range < 128 &&
00276 vbv_buffer_size <= 20 &&
00277 v <= 1856000/400 &&
00278 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
00279
00280 put_bits(&s->pb, 1, constraint_parameter_flag);
00281
00282 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
00283 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
00284
00285 if(s->codec_id == AV_CODEC_ID_MPEG2VIDEO){
00286 put_header(s, EXT_START_CODE);
00287 put_bits(&s->pb, 4, 1);
00288
00289 put_bits(&s->pb, 1, s->avctx->profile == 0);
00290
00291 put_bits(&s->pb, 3, s->avctx->profile);
00292 put_bits(&s->pb, 4, s->avctx->level);
00293
00294 put_bits(&s->pb, 1, s->progressive_sequence);
00295 put_bits(&s->pb, 2, s->chroma_format);
00296 put_bits(&s->pb, 2, s->width >>12);
00297 put_bits(&s->pb, 2, s->height>>12);
00298 put_bits(&s->pb, 12, v>>18);
00299 put_bits(&s->pb, 1, 1);
00300 put_bits(&s->pb, 8, vbv_buffer_size >>10);
00301 put_bits(&s->pb, 1, s->low_delay);
00302 put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1);
00303 put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1);
00304 }
00305
00306 put_header(s, GOP_START_CODE);
00307 put_bits(&s->pb, 1, s->drop_frame_timecode);
00308
00309
00310 fps = (framerate.num + framerate.den/2)/ framerate.den;
00311 time_code = s->current_picture_ptr->f.coded_picture_number + s->avctx->timecode_frame_start;
00312
00313 s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
00314 av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
00315 if (s->drop_frame_timecode)
00316 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
00317 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
00318 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
00319 put_bits(&s->pb, 1, 1);
00320 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
00321 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
00322 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
00323 put_bits(&s->pb, 1, 0);
00324 }
00325 }
00326
00327 static inline void encode_mb_skip_run(MpegEncContext *s, int run){
00328 while (run >= 33) {
00329 put_bits(&s->pb, 11, 0x008);
00330 run -= 33;
00331 }
00332 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
00333 ff_mpeg12_mbAddrIncrTable[run][0]);
00334 }
00335
00336 static av_always_inline void put_qscale(MpegEncContext *s)
00337 {
00338 if(s->q_scale_type){
00339 av_assert2(s->qscale>=1 && s->qscale <=12);
00340 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
00341 }else{
00342 put_bits(&s->pb, 5, s->qscale);
00343 }
00344 }
00345
00346 void ff_mpeg1_encode_slice_header(MpegEncContext *s){
00347 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
00348 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
00349 put_bits(&s->pb, 3, s->mb_y >> 7);
00350 } else {
00351 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
00352 }
00353 put_qscale(s);
00354 put_bits(&s->pb, 1, 0);
00355 }
00356
00357 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
00358 {
00359 mpeg1_encode_sequence_header(s);
00360
00361
00362 put_header(s, PICTURE_START_CODE);
00363
00364
00365
00366 put_bits(&s->pb, 10, (s->picture_number -
00367 s->gop_picture_number) & 0x3ff);
00368 put_bits(&s->pb, 3, s->pict_type);
00369
00370 s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
00371 put_bits(&s->pb, 16, 0xFFFF);
00372
00373
00374 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
00375 put_bits(&s->pb, 1, 0);
00376 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
00377 put_bits(&s->pb, 3, s->f_code);
00378 else
00379 put_bits(&s->pb, 3, 7);
00380 }
00381
00382
00383 if (s->pict_type == AV_PICTURE_TYPE_B) {
00384 put_bits(&s->pb, 1, 0);
00385 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
00386 put_bits(&s->pb, 3, s->b_code);
00387 else
00388 put_bits(&s->pb, 3, 7);
00389 }
00390
00391 put_bits(&s->pb, 1, 0);
00392
00393 s->frame_pred_frame_dct = 1;
00394 if(s->codec_id == AV_CODEC_ID_MPEG2VIDEO){
00395 put_header(s, EXT_START_CODE);
00396 put_bits(&s->pb, 4, 8);
00397 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
00398 put_bits(&s->pb, 4, s->f_code);
00399 put_bits(&s->pb, 4, s->f_code);
00400 }else{
00401 put_bits(&s->pb, 8, 255);
00402 }
00403 if (s->pict_type == AV_PICTURE_TYPE_B) {
00404 put_bits(&s->pb, 4, s->b_code);
00405 put_bits(&s->pb, 4, s->b_code);
00406 }else{
00407 put_bits(&s->pb, 8, 255);
00408 }
00409 put_bits(&s->pb, 2, s->intra_dc_precision);
00410
00411 av_assert0(s->picture_structure == PICT_FRAME);
00412 put_bits(&s->pb, 2, s->picture_structure);
00413 if (s->progressive_sequence) {
00414 put_bits(&s->pb, 1, 0);
00415 } else {
00416 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
00417 }
00418
00419
00420 s->frame_pred_frame_dct = s->progressive_sequence;
00421
00422 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
00423 put_bits(&s->pb, 1, s->concealment_motion_vectors);
00424 put_bits(&s->pb, 1, s->q_scale_type);
00425 put_bits(&s->pb, 1, s->intra_vlc_format);
00426 put_bits(&s->pb, 1, s->alternate_scan);
00427 put_bits(&s->pb, 1, s->repeat_first_field);
00428 s->progressive_frame = s->progressive_sequence;
00429 put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0);
00430 put_bits(&s->pb, 1, s->progressive_frame);
00431 put_bits(&s->pb, 1, 0);
00432 }
00433 if (s->scan_offset) {
00434 int i;
00435
00436 put_header(s, USER_START_CODE);
00437 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
00438 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
00439 }
00440 }
00441
00442 s->mb_y=0;
00443 ff_mpeg1_encode_slice_header(s);
00444 }
00445
00446 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
00447 int has_mv, int field_motion)
00448 {
00449 put_bits(&s->pb, n, bits);
00450 if (!s->frame_pred_frame_dct) {
00451 if (has_mv)
00452 put_bits(&s->pb, 2, 2 - field_motion);
00453 put_bits(&s->pb, 1, s->interlaced_dct);
00454 }
00455 }
00456
00457 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
00458 DCTELEM block[6][64],
00459 int motion_x, int motion_y,
00460 int mb_block_count)
00461 {
00462 int i, cbp;
00463 const int mb_x = s->mb_x;
00464 const int mb_y = s->mb_y;
00465 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
00466
00467
00468 cbp = 0;
00469 for(i=0;i<mb_block_count;i++) {
00470 if (s->block_last_index[i] >= 0)
00471 cbp |= 1 << (mb_block_count - 1 - i);
00472 }
00473
00474 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
00475 (mb_x != s->mb_width - 1 || (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
00476 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
00477 (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) |
00478 ((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))) {
00479 s->mb_skip_run++;
00480 s->qscale -= s->dquant;
00481 s->skip_count++;
00482 s->misc_bits++;
00483 s->last_bits++;
00484 if(s->pict_type == AV_PICTURE_TYPE_P){
00485 s->last_mv[0][1][0]= s->last_mv[0][0][0]=
00486 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
00487 }
00488 } else {
00489 if(first_mb){
00490 av_assert0(s->mb_skip_run == 0);
00491 encode_mb_skip_run(s, s->mb_x);
00492 }else{
00493 encode_mb_skip_run(s, s->mb_skip_run);
00494 }
00495
00496 if (s->pict_type == AV_PICTURE_TYPE_I) {
00497 if(s->dquant && cbp){
00498 put_mb_modes(s, 2, 1, 0, 0);
00499 put_qscale(s);
00500 }else{
00501 put_mb_modes(s, 1, 1, 0, 0);
00502 s->qscale -= s->dquant;
00503 }
00504 s->misc_bits+= get_bits_diff(s);
00505 s->i_count++;
00506 } else if (s->mb_intra) {
00507 if(s->dquant && cbp){
00508 put_mb_modes(s, 6, 0x01, 0, 0);
00509 put_qscale(s);
00510 }else{
00511 put_mb_modes(s, 5, 0x03, 0, 0);
00512 s->qscale -= s->dquant;
00513 }
00514 s->misc_bits+= get_bits_diff(s);
00515 s->i_count++;
00516 memset(s->last_mv, 0, sizeof(s->last_mv));
00517 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
00518 if(s->mv_type == MV_TYPE_16X16){
00519 if (cbp != 0) {
00520 if ((motion_x|motion_y) == 0) {
00521 if(s->dquant){
00522 put_mb_modes(s, 5, 1, 0, 0);
00523 put_qscale(s);
00524 }else{
00525 put_mb_modes(s, 2, 1, 0, 0);
00526 }
00527 s->misc_bits+= get_bits_diff(s);
00528 } else {
00529 if(s->dquant){
00530 put_mb_modes(s, 5, 2, 1, 0);
00531 put_qscale(s);
00532 }else{
00533 put_mb_modes(s, 1, 1, 1, 0);
00534 }
00535 s->misc_bits+= get_bits_diff(s);
00536 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);
00537 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);
00538 s->mv_bits+= get_bits_diff(s);
00539 }
00540 } else {
00541 put_bits(&s->pb, 3, 1);
00542 if (!s->frame_pred_frame_dct)
00543 put_bits(&s->pb, 2, 2);
00544 s->misc_bits+= get_bits_diff(s);
00545 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);
00546 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);
00547 s->qscale -= s->dquant;
00548 s->mv_bits+= get_bits_diff(s);
00549 }
00550 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
00551 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
00552 }else{
00553 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
00554
00555 if (cbp) {
00556 if(s->dquant){
00557 put_mb_modes(s, 5, 2, 1, 1);
00558 put_qscale(s);
00559 }else{
00560 put_mb_modes(s, 1, 1, 1, 1);
00561 }
00562 } else {
00563 put_bits(&s->pb, 3, 1);
00564 put_bits(&s->pb, 2, 1);
00565 s->qscale -= s->dquant;
00566 }
00567 s->misc_bits+= get_bits_diff(s);
00568 for(i=0; i<2; i++){
00569 put_bits(&s->pb, 1, s->field_select[0][i]);
00570 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
00571 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
00572 s->last_mv[0][i][0]= s->mv[0][i][0];
00573 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
00574 }
00575 s->mv_bits+= get_bits_diff(s);
00576 }
00577 if(cbp) {
00578 if (s->chroma_y_shift) {
00579 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
00580 } else {
00581 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
00582 put_sbits(&s->pb, 2, cbp);
00583 }
00584 }
00585 s->f_count++;
00586 } else{
00587 if(s->mv_type == MV_TYPE_16X16){
00588 if (cbp){
00589 if (s->dquant) {
00590 if(s->mv_dir == MV_DIR_FORWARD)
00591 put_mb_modes(s, 6, 3, 1, 0);
00592 else
00593 put_mb_modes(s, 8-s->mv_dir, 2, 1, 0);
00594 put_qscale(s);
00595 } else {
00596 put_mb_modes(s, 5-s->mv_dir, 3, 1, 0);
00597 }
00598 }else{
00599 put_bits(&s->pb, 5-s->mv_dir, 2);
00600 if (!s->frame_pred_frame_dct)
00601 put_bits(&s->pb, 2, 2);
00602 s->qscale -= s->dquant;
00603 }
00604 s->misc_bits += get_bits_diff(s);
00605 if (s->mv_dir&MV_DIR_FORWARD){
00606 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
00607 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
00608 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
00609 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
00610 s->f_count++;
00611 }
00612 if (s->mv_dir&MV_DIR_BACKWARD){
00613 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
00614 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
00615 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
00616 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
00617 s->b_count++;
00618 }
00619 }else{
00620 av_assert2(s->mv_type == MV_TYPE_FIELD);
00621 av_assert2(!s->frame_pred_frame_dct);
00622 if (cbp){
00623 if (s->dquant) {
00624 if(s->mv_dir == MV_DIR_FORWARD)
00625 put_mb_modes(s, 6, 3, 1, 1);
00626 else
00627 put_mb_modes(s, 8-s->mv_dir, 2, 1, 1);
00628 put_qscale(s);
00629 } else {
00630 put_mb_modes(s, 5-s->mv_dir, 3, 1, 1);
00631 }
00632 }else{
00633 put_bits(&s->pb, 5-s->mv_dir, 2);
00634 put_bits(&s->pb, 2, 1);
00635 s->qscale -= s->dquant;
00636 }
00637 s->misc_bits += get_bits_diff(s);
00638 if (s->mv_dir&MV_DIR_FORWARD){
00639 for(i=0; i<2; i++){
00640 put_bits(&s->pb, 1, s->field_select[0][i]);
00641 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
00642 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
00643 s->last_mv[0][i][0]= s->mv[0][i][0];
00644 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
00645 }
00646 s->f_count++;
00647 }
00648 if (s->mv_dir&MV_DIR_BACKWARD){
00649 for(i=0; i<2; i++){
00650 put_bits(&s->pb, 1, s->field_select[1][i]);
00651 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
00652 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
00653 s->last_mv[1][i][0]= s->mv[1][i][0];
00654 s->last_mv[1][i][1]= 2*s->mv[1][i][1];
00655 }
00656 s->b_count++;
00657 }
00658 }
00659 s->mv_bits += get_bits_diff(s);
00660 if(cbp) {
00661 if (s->chroma_y_shift) {
00662 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
00663 } else {
00664 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
00665 put_sbits(&s->pb, 2, cbp);
00666 }
00667 }
00668 }
00669 for(i=0;i<mb_block_count;i++) {
00670 if (cbp & (1 << (mb_block_count - 1 - i))) {
00671 mpeg1_encode_block(s, block[i], i);
00672 }
00673 }
00674 s->mb_skip_run = 0;
00675 if(s->mb_intra)
00676 s->i_tex_bits+= get_bits_diff(s);
00677 else
00678 s->p_tex_bits+= get_bits_diff(s);
00679 }
00680 }
00681
00682 void ff_mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
00683 {
00684 if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
00685 else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
00686 }
00687
00688
00689 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
00690 {
00691 if (val == 0) {
00692
00693 put_bits(&s->pb,
00694 ff_mpeg12_mbMotionVectorTable[0][1],
00695 ff_mpeg12_mbMotionVectorTable[0][0]);
00696 } else {
00697 int code, sign, bits;
00698 int bit_size = f_or_b_code - 1;
00699 int range = 1 << bit_size;
00700
00701 val = sign_extend(val, 5 + bit_size);
00702
00703 if (val >= 0) {
00704 val--;
00705 code = (val >> bit_size) + 1;
00706 bits = val & (range - 1);
00707 sign = 0;
00708 } else {
00709 val = -val;
00710 val--;
00711 code = (val >> bit_size) + 1;
00712 bits = val & (range - 1);
00713 sign = 1;
00714 }
00715
00716 av_assert2(code > 0 && code <= 16);
00717
00718 put_bits(&s->pb,
00719 ff_mpeg12_mbMotionVectorTable[code][1],
00720 ff_mpeg12_mbMotionVectorTable[code][0]);
00721
00722 put_bits(&s->pb, 1, sign);
00723 if (bit_size > 0) {
00724 put_bits(&s->pb, bit_size, bits);
00725 }
00726 }
00727 }
00728
00729 void ff_mpeg1_encode_init(MpegEncContext *s)
00730 {
00731 static int done=0;
00732
00733 ff_mpeg12_common_init(s);
00734
00735 if(!done){
00736 int f_code;
00737 int mv;
00738 int i;
00739
00740 done=1;
00741 ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
00742 ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
00743
00744 for(i=0; i<64; i++)
00745 {
00746 mpeg1_max_level[0][i]= ff_rl_mpeg1.max_level[0][i];
00747 mpeg1_index_run[0][i]= ff_rl_mpeg1.index_run[0][i];
00748 }
00749
00750 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
00751 if(s->intra_vlc_format)
00752 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
00753
00754
00755 for(i=-255; i<256; i++)
00756 {
00757 int adiff, index;
00758 int bits, code;
00759 int diff=i;
00760
00761 adiff = FFABS(diff);
00762 if(diff<0) diff--;
00763 index = av_log2(2*adiff);
00764
00765 bits= ff_mpeg12_vlc_dc_lum_bits[index] + index;
00766 code= (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
00767 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
00768
00769 bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index;
00770 code= (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
00771 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
00772 }
00773
00774 for(f_code=1; f_code<=MAX_FCODE; f_code++){
00775 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
00776 int len;
00777
00778 if(mv==0) len= ff_mpeg12_mbMotionVectorTable[0][1];
00779 else{
00780 int val, bit_size, code;
00781
00782 bit_size = f_code - 1;
00783
00784 val=mv;
00785 if (val < 0)
00786 val = -val;
00787 val--;
00788 code = (val >> bit_size) + 1;
00789 if(code<17){
00790 len= ff_mpeg12_mbMotionVectorTable[code][1] + 1 + bit_size;
00791 }else{
00792 len= ff_mpeg12_mbMotionVectorTable[16][1] + 2 + bit_size;
00793 }
00794 }
00795
00796 mv_penalty[f_code][mv+MAX_MV]= len;
00797 }
00798 }
00799
00800
00801 for(f_code=MAX_FCODE; f_code>0; f_code--){
00802 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
00803 fcode_tab[mv+MAX_MV]= f_code;
00804 }
00805 }
00806 }
00807 s->me.mv_penalty= mv_penalty;
00808 s->fcode_tab= fcode_tab;
00809 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO){
00810 s->min_qcoeff=-255;
00811 s->max_qcoeff= 255;
00812 }else{
00813 s->min_qcoeff=-2047;
00814 s->max_qcoeff= 2047;
00815 }
00816 if (s->intra_vlc_format) {
00817 s->intra_ac_vlc_length=
00818 s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
00819 } else {
00820 s->intra_ac_vlc_length=
00821 s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
00822 }
00823 s->inter_ac_vlc_length=
00824 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
00825 }
00826
00827 static inline void encode_dc(MpegEncContext *s, int diff, int component)
00828 {
00829 if(((unsigned) (diff+255)) >= 511){
00830 int index;
00831
00832 if(diff<0){
00833 index= av_log2_16bit(-2*diff);
00834 diff--;
00835 }else{
00836 index= av_log2_16bit(2*diff);
00837 }
00838 if (component == 0) {
00839 put_bits(
00840 &s->pb,
00841 ff_mpeg12_vlc_dc_lum_bits[index] + index,
00842 (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
00843 }else{
00844 put_bits(
00845 &s->pb,
00846 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
00847 (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
00848 }
00849 }else{
00850 if (component == 0) {
00851 put_bits(
00852 &s->pb,
00853 mpeg1_lum_dc_uni[diff+255]&0xFF,
00854 mpeg1_lum_dc_uni[diff+255]>>8);
00855 } else {
00856 put_bits(
00857 &s->pb,
00858 mpeg1_chr_dc_uni[diff+255]&0xFF,
00859 mpeg1_chr_dc_uni[diff+255]>>8);
00860 }
00861 }
00862 }
00863
00864 static void mpeg1_encode_block(MpegEncContext *s,
00865 DCTELEM *block,
00866 int n)
00867 {
00868 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
00869 int code, component;
00870 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
00871
00872 last_index = s->block_last_index[n];
00873
00874
00875 if (s->mb_intra) {
00876 component = (n <= 3 ? 0 : (n&1) + 1);
00877 dc = block[0];
00878 diff = dc - s->last_dc[component];
00879 encode_dc(s, diff, component);
00880 s->last_dc[component] = dc;
00881 i = 1;
00882 if (s->intra_vlc_format)
00883 table_vlc = ff_rl_mpeg2.table_vlc;
00884 } else {
00885
00886
00887 level = block[0];
00888 if (abs(level) == 1) {
00889 code = ((uint32_t)level >> 31);
00890 put_bits(&s->pb, 2, code | 0x02);
00891 i = 1;
00892 } else {
00893 i = 0;
00894 last_non_zero = -1;
00895 goto next_coef;
00896 }
00897 }
00898
00899
00900 last_non_zero = i - 1;
00901
00902 for(;i<=last_index;i++) {
00903 j = s->intra_scantable.permutated[i];
00904 level = block[j];
00905 next_coef:
00906
00907 if (level != 0) {
00908 run = i - last_non_zero - 1;
00909
00910 alevel= level;
00911 MASK_ABS(sign, alevel);
00912 sign&=1;
00913
00914 if (alevel <= mpeg1_max_level[0][run]){
00915 code= mpeg1_index_run[0][run] + alevel - 1;
00916
00917 put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
00918 } else {
00919
00920 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
00921
00922 put_bits(&s->pb, 6, run);
00923 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO){
00924 if (alevel < 128) {
00925 put_sbits(&s->pb, 8, level);
00926 } else {
00927 if (level < 0) {
00928 put_bits(&s->pb, 16, 0x8001 + level + 255);
00929 } else {
00930 put_sbits(&s->pb, 16, level);
00931 }
00932 }
00933 }else{
00934 put_sbits(&s->pb, 12, level);
00935 }
00936 }
00937 last_non_zero = i;
00938 }
00939 }
00940
00941 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
00942 }
00943
00944 #define OFFSET(x) offsetof(MpegEncContext, x)
00945 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
00946 #define COMMON_OPTS\
00947 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
00948 { "intra_vlc", "Use MPEG-2 intra VLC table.", OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },\
00949 { "drop_frame_timecode", "Timecode is in drop frame format.", OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE}, \
00950 { "scan_offset", "Reserve space for SVCD scan offset user data.", OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
00951
00952 static const AVOption mpeg1_options[] = {
00953 COMMON_OPTS
00954 FF_MPV_COMMON_OPTS
00955 { NULL },
00956 };
00957
00958 static const AVOption mpeg2_options[] = {
00959 COMMON_OPTS
00960 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
00961 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
00962 FF_MPV_COMMON_OPTS
00963 { NULL },
00964 };
00965
00966 #define mpeg12_class(x)\
00967 static const AVClass mpeg## x ##_class = {\
00968 .class_name = "mpeg" #x "video encoder",\
00969 .item_name = av_default_item_name,\
00970 .option = mpeg## x ##_options,\
00971 .version = LIBAVUTIL_VERSION_INT,\
00972 };
00973
00974 mpeg12_class(1)
00975 mpeg12_class(2)
00976
00977 AVCodec ff_mpeg1video_encoder = {
00978 .name = "mpeg1video",
00979 .type = AVMEDIA_TYPE_VIDEO,
00980 .id = AV_CODEC_ID_MPEG1VIDEO,
00981 .priv_data_size = sizeof(MpegEncContext),
00982 .init = encode_init,
00983 .encode2 = ff_MPV_encode_picture,
00984 .close = ff_MPV_encode_end,
00985 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
00986 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
00987 AV_PIX_FMT_NONE },
00988 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
00989 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
00990 .priv_class = &mpeg1_class,
00991 };
00992
00993 AVCodec ff_mpeg2video_encoder = {
00994 .name = "mpeg2video",
00995 .type = AVMEDIA_TYPE_VIDEO,
00996 .id = AV_CODEC_ID_MPEG2VIDEO,
00997 .priv_data_size = sizeof(MpegEncContext),
00998 .init = encode_init,
00999 .encode2 = ff_MPV_encode_picture,
01000 .close = ff_MPV_encode_end,
01001 .supported_framerates = ff_mpeg2_frame_rate_tab,
01002 .pix_fmts = (const enum AVPixelFormat[]){
01003 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE
01004 },
01005 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
01006 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
01007 .priv_class = &mpeg2_class,
01008 };