/* put sequence header if needed */ static void mpeg1_encode_sequence_header(MpegEncContext *s) { unsigned int vbv_buffer_size; unsigned int fps, v; int i; uint64_t time_code; float best_aspect_error= 1E10; float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio); int constraint_parameter_flag; if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA) if (s->current_picture.f.key_frame) { AVRational framerate= avpriv_frame_rate_tab[s->frame_rate_index]; /* mpeg1 header repeated every gop */ put_header(s, SEQ_START_CODE); put_sbits(&s->pb, 12, s->width ); put_sbits(&s->pb, 12, s->height); for(i=1; i<15; i++){ float error= aspect_ratio; if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1) error-= 1.0/ff_mpeg1_aspect[i]; else error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width; error= FFABS(error); if(error < best_aspect_error){ best_aspect_error= error; s->aspect_ratio_info= i; } } put_bits(&s->pb, 4, s->aspect_ratio_info); put_bits(&s->pb, 4, s->frame_rate_index); if(s->avctx->rc_max_rate){ v = (s->avctx->rc_max_rate + 399) / 400; if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO) v = 0x3ffff; }else{ v= 0x3FFFF; } if(s->avctx->rc_buffer_size) vbv_buffer_size = s->avctx->rc_buffer_size; else /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */ vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024; vbv_buffer_size= (vbv_buffer_size + 16383) / 16384; put_sbits(&s->pb, 18, v); put_bits(&s->pb, 1, 1); /* marker */ put_sbits(&s->pb, 10, vbv_buffer_size); constraint_parameter_flag= s->width <= 768 && s->height <= 576 && s->mb_width * s->mb_height <= 396 && s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 && framerate.num <= framerate.den*30 && s->avctx->me_range && s->avctx->me_range < 128 && vbv_buffer_size <= 20 && v <= 1856000/400 && s->codec_id == CODEC_ID_MPEG1VIDEO; put_bits(&s->pb, 1, constraint_parameter_flag); ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); if(s->codec_id == CODEC_ID_MPEG2VIDEO){ put_header(s, EXT_START_CODE); put_bits(&s->pb, 4, 1); //seq ext put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */ put_bits(&s->pb, 3, s->avctx->profile); //profile put_bits(&s->pb, 4, s->avctx->level); //level put_bits(&s->pb, 1, s->progressive_sequence); put_bits(&s->pb, 2, s->chroma_format); put_bits(&s->pb, 2, s->width >>12); put_bits(&s->pb, 2, s->height>>12); put_bits(&s->pb, 12, v>>18); //bitrate ext put_bits(&s->pb, 1, 1); //marker put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext put_bits(&s->pb, 1, s->low_delay); put_bits(&s->pb, 2, 0); // frame_rate_ext_n put_bits(&s->pb, 5, 0); // frame_rate_ext_d }
/* put sequence header if needed */ static void mpeg1_encode_sequence_header(MpegEncContext *s) { unsigned int vbv_buffer_size; unsigned int fps, v; uint64_t time_code; int constraint_parameter_flag; if (s->current_picture.f.key_frame) { AVRational framerate= ff_frame_rate_tab[s->frame_rate_index]; /* mpeg1 header repeated every gop */ put_header(s, SEQ_START_CODE); put_sbits(&s->pb, 12, s->width ); put_sbits(&s->pb, 12, s->height); put_bits(&s->pb, 4, s->aspect_ratio_info); put_bits(&s->pb, 4, s->frame_rate_index); if(s->avctx->rc_max_rate){ v = (s->avctx->rc_max_rate + 399) / 400; if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO) v = 0x3ffff; }else{ v= 0x3FFFF; } if(s->avctx->rc_buffer_size) vbv_buffer_size = s->avctx->rc_buffer_size; else /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */ vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024; vbv_buffer_size= (vbv_buffer_size + 16383) / 16384; put_sbits(&s->pb, 18, v); put_bits(&s->pb, 1, 1); /* marker */ put_sbits(&s->pb, 10, vbv_buffer_size); constraint_parameter_flag= s->width <= 768 && s->height <= 576 && s->mb_width * s->mb_height <= 396 && s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 && framerate.num <= framerate.den*30 && s->avctx->me_range && s->avctx->me_range < 128 && vbv_buffer_size <= 20 && v <= 1856000/400 && s->codec_id == CODEC_ID_MPEG1VIDEO; put_bits(&s->pb, 1, constraint_parameter_flag); ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); if(s->codec_id == CODEC_ID_MPEG2VIDEO){ put_header(s, EXT_START_CODE); put_bits(&s->pb, 4, 1); //seq ext put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */ put_bits(&s->pb, 3, s->avctx->profile); //profile put_bits(&s->pb, 4, s->avctx->level); //level put_bits(&s->pb, 1, s->progressive_sequence); put_bits(&s->pb, 2, s->chroma_format); put_bits(&s->pb, 2, s->width >>12); put_bits(&s->pb, 2, s->height>>12); put_bits(&s->pb, 12, v>>18); //bitrate ext put_bits(&s->pb, 1, 1); //marker put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext put_bits(&s->pb, 1, s->low_delay); put_bits(&s->pb, 2, 0); // frame_rate_ext_n put_bits(&s->pb, 5, 0); // frame_rate_ext_d if (s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED) { put_header(s, EXT_START_CODE); put_bits(&s->pb, 4, 2); //seq display ext put_bits(&s->pb, 3, 0); //video_format, set to component put_bits(&s->pb, 1, 1); //colour_description put_bits(&s->pb, 8, s->avctx->color_primaries); //colour_primaries put_bits(&s->pb, 8, s->avctx->color_transfer); //transfer_characteristics put_bits(&s->pb, 8, s->avctx->color_matrix); //matrix_coefficients put_bits(&s->pb, 14, s->width); put_bits(&s->pb, 1, 1); put_bits(&s->pb, 14, s->height); put_bits(&s->pb, 1, 0); } }
/* put sequence header if needed */ static void mpeg1_encode_sequence_header(MpegEncContext *s) { unsigned int vbv_buffer_size, fps, v; int i, constraint_parameter_flag; uint64_t time_code; int64_t best_aspect_error = INT64_MAX; AVRational aspect_ratio = s->avctx->sample_aspect_ratio; if (aspect_ratio.num == 0 || aspect_ratio.den == 0) aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA) if (s->current_picture.f->key_frame) { AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index]; /* mpeg1 header repeated every gop */ put_header(s, SEQ_START_CODE); put_sbits(&s->pb, 12, s->width & 0xFFF); put_sbits(&s->pb, 12, s->height & 0xFFF); for (i = 1; i < 15; i++) { int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den; if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1) error -= (1LL<<32) / ff_mpeg1_aspect[i]; else error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den; error = FFABS(error); if (error - 2 <= best_aspect_error) { best_aspect_error = error; s->aspect_ratio_info = i; } } put_bits(&s->pb, 4, s->aspect_ratio_info); put_bits(&s->pb, 4, s->frame_rate_index); if (s->avctx->rc_max_rate) { v = (s->avctx->rc_max_rate + 399) / 400; if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO) v = 0x3ffff; } else { v = 0x3FFFF; } if (s->avctx->rc_buffer_size) vbv_buffer_size = s->avctx->rc_buffer_size; else /* VBV calculation: Scaled so that a VCD has the proper * VBV size of 40 kilobytes */ vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024; vbv_buffer_size = (vbv_buffer_size + 16383) / 16384; put_sbits(&s->pb, 18, v); put_bits(&s->pb, 1, 1); // marker put_sbits(&s->pb, 10, vbv_buffer_size); constraint_parameter_flag = s->width <= 768 && s->height <= 576 && s->mb_width * s->mb_height <= 396 && s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den && framerate.num <= framerate.den * 30 && s->avctx->me_range && s->avctx->me_range < 128 && vbv_buffer_size <= 20 && v <= 1856000 / 400 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO; put_bits(&s->pb, 1, constraint_parameter_flag); ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) { AVFrameSideData *side_data; int width = s->width; int height = s->height; int use_seq_disp_ext; put_header(s, EXT_START_CODE); put_bits(&s->pb, 4, 1); // seq ext put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile put_bits(&s->pb, 3, s->avctx->profile); // profile put_bits(&s->pb, 4, s->avctx->level); // level put_bits(&s->pb, 1, s->progressive_sequence); put_bits(&s->pb, 2, s->chroma_format); put_bits(&s->pb, 2, s->width >> 12); put_bits(&s->pb, 2, s->height >> 12); put_bits(&s->pb, 12, v >> 18); // bitrate ext put_bits(&s->pb, 1, 1); // marker put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext put_bits(&s->pb, 1, s->low_delay); put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN); if (side_data) { AVPanScan *pan_scan = (AVPanScan *)side_data->data; if (pan_scan->width && pan_scan->height) { width = pan_scan->width >> 4; height = pan_scan->height >> 4; } }
/* put sequence header if needed */ static void mpeg1_encode_sequence_header(MpegEncContext *s) { unsigned int vbv_buffer_size; unsigned int fps, v; int i; uint64_t time_code; float best_aspect_error= 1E10; float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio); int constraint_parameter_flag; if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA) if (s->current_picture.key_frame) { AVRational framerate= ff_frame_rate_tab[s->frame_rate_index]; /* mpeg1 header repeated every gop */ put_header(s, SEQ_START_CODE); put_bits(&s->pb, 12, s->width); put_bits(&s->pb, 12, s->height); #if 0 //MEANX for(i=1; i<15; i++){ float error= aspect_ratio; if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1) error-= 1.0/ff_mpeg1_aspect[i]; else error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width; error= FFABS(error); if(error < best_aspect_error){ best_aspect_error= error; s->aspect_ratio_info= i; } } #endif // MEANX //MEANX put_bits(&s->pb, 4, s->aspect_ratio_info); //MEANX put_bits(&s->pb, 4, s->frame_rate_index); // MEANX 4:3 if(s->avctx->sample_aspect_ratio.num==16 && s->avctx->sample_aspect_ratio.den==9) { //printf("FFmpeg : Wide\n"); put_bits(&s->pb,4,3); //16:9 } else //4:3 { if(s->codec_id == CODEC_ID_MPEG2VIDEO) put_bits(&s->pb, 4, 2); else put_bits(&s->pb, 4, 12); // MPEG1 } // /MEANX // //MEANX PULLDOWN put_bits(&s->pb, 4, s->frame_rate_index); if((s->flags2 & CODEC_FLAG2_32_PULLDOWN) && (s->codec_id == CODEC_ID_MPEG2VIDEO)) { put_bits(&s->pb, 4,4); } else { put_bits(&s->pb, 4, s->frame_rate_index); } //MEANX pulldown if(s->avctx->rc_max_rate_header){ //MEANX we use header v = (s->avctx->rc_max_rate_header + 399) / 400; if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO) v = 0x3ffff; }else{ v= 0x3FFFF; } // MEANX we use rc_buffer_size_header here to force // a correct rc_buffer_size if(s->avctx->rc_buffer_size_header) vbv_buffer_size = s->avctx->rc_buffer_size_header; else /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */ vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024; vbv_buffer_size= (vbv_buffer_size + 16383) / 16384; put_bits(&s->pb, 18, v & 0x3FFFF); put_bits(&s->pb, 1, 1); /* marker */ put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF); constraint_parameter_flag= s->width <= 768 && s->height <= 576 && s->mb_width * s->mb_height <= 396 && s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 && framerate.num <= framerate.den*30 && s->avctx->me_range && s->avctx->me_range < 128 && vbv_buffer_size <= 20 && v <= 1856000/400 && s->codec_id == CODEC_ID_MPEG1VIDEO; put_bits(&s->pb, 1, constraint_parameter_flag); ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); if(s->codec_id == CODEC_ID_MPEG2VIDEO){ put_header(s, EXT_START_CODE); put_bits(&s->pb, 4, 1); //seq ext put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */ put_bits(&s->pb, 3, s->avctx->profile); //profile put_bits(&s->pb, 4, s->avctx->level); //level // MEANX pulldown put_bits(&s->pb, 1, s->progressive_sequence); // MEANX Pulldown if(s->flags2 & CODEC_FLAG2_32_PULLDOWN) //MEANX put_bits(&s->pb, 1, 0); else put_bits(&s->pb, 1, s->progressive_sequence); // /MEANX put_bits(&s->pb, 2, s->chroma_format); put_bits(&s->pb, 2, 0); //horizontal size ext put_bits(&s->pb, 2, 0); //vertical size ext put_bits(&s->pb, 12, v>>18); //bitrate ext put_bits(&s->pb, 1, 1); //marker put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext put_bits(&s->pb, 1, s->low_delay); put_bits(&s->pb, 2, 0); // frame_rate_ext_n put_bits(&s->pb, 5, 0); // frame_rate_ext_d }