/* * Copyright (c) 2003 Michael Niedermayer * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * ASUS V1/V2 encoder. */ #include "libavutil/attributes.h" #include "libavutil/mem.h" #include "asv.h" #include "avcodec.h" #include "mathops.h" #include "mpeg12data.h" static inline void asv2_put_bits(PutBitContext *pb, int n, int v){ put_bits(pb, n, ff_reverse[ v << (8-n) ]); } static inline void asv1_put_level(PutBitContext *pb, int level){ unsigned int index= level + 3; if(index <= 6) put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]); else{ put_bits(pb, ff_asv_level_tab[3][1], ff_asv_level_tab[3][0]); put_sbits(pb, 8, level); } } static inline void asv2_put_level(PutBitContext *pb, int level){ unsigned int index= level + 31; if(index <= 62) put_bits(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]); else{ put_bits(pb, ff_asv2_level_tab[31][1], ff_asv2_level_tab[31][0]); asv2_put_bits(pb, 8, level&0xFF); } } static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){ int i; int nc_count=0; put_bits(&a->pb, 8, (block[0] + 32)>>6); block[0]= 0; for(i=0; i<10; i++){ const int index = ff_asv_scantab[4*i]; int ccp=0; if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8; if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4; if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2; if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1; if(ccp){ for(;nc_count; nc_count--) put_bits(&a->pb, ff_asv_ccp_tab[0][1], ff_asv_ccp_tab[0][0]); put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][0]); if(ccp&8) asv1_put_level(&a->pb, block[index + 0]); if(ccp&4) asv1_put_level(&a->pb, block[index + 8]); if(ccp&2) asv1_put_level(&a->pb, block[index + 1]); if(ccp&1) asv1_put_level(&a->pb, block[index + 9]); }else{ nc_count++; } } put_bits(&a->pb, ff_asv_ccp_tab[16][1], ff_asv_ccp_tab[16][0]); } static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){ int i; int count=0; for(count=63; count>3; count--){ const int index = ff_asv_scantab[count]; if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 ) break; } count >>= 2; asv2_put_bits(&a->pb, 4, count); asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6); block[0]= 0; for(i=0; i<=count; i++){ const int index = ff_asv_scantab[4*i]; int ccp=0; if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8; if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4; if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2; if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1; assert(i || ccp<8); if(i) put_bits(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]); else put_bits(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]); if(ccp){ if(ccp&8) asv2_put_level(&a->pb, block[index + 0]); if(ccp&4) asv2_put_level(&a->pb, block[index + 8]); if(ccp&2) asv2_put_level(&a->pb, block[index + 1]); if(ccp&1) asv2_put_level(&a->pb, block[index + 9]); } } } #define MAX_MB_SIZE (30*16*16*3/2/8) static inline int encode_mb(ASV1Context *a, DCTELEM block[6][64]){ int i; if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < MAX_MB_SIZE) { av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n"); return -1; } if(a->avctx->codec_id == AV_CODEC_ID_ASV1){ for(i=0; i<6; i++) asv1_encode_block(a, block[i]); }else{ for(i=0; i<6; i++) asv2_encode_block(a, block[i]); } return 0; } static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){ DCTELEM (*block)[64]= a->block; int linesize= a->picture.linesize[0]; int i; uint8_t *ptr_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16; uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8; uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8; a->dsp.get_pixels(block[0], ptr_y , linesize); a->dsp.get_pixels(block[1], ptr_y + 8, linesize); a->dsp.get_pixels(block[2], ptr_y + 8*linesize , linesize); a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize); for(i=0; i<4; i++) a->dsp.fdct(block[i]); if(!(a->avctx->flags&CODEC_FLAG_GRAY)){ a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]); a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]); for(i=4; i<6; i++) a->dsp.fdct(block[i]); } } static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet) { ASV1Context * const a = avctx->priv_data; AVFrame * const p= &a->picture; int size, ret; int mb_x, mb_y; if (!pkt->data && (ret = av_new_packet(pkt, a->mb_height*a->mb_width*MAX_MB_SIZE + FF_MIN_BUFFER_SIZE)) < 0) { av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n"); return ret; } init_put_bits(&a->pb, pkt->data, pkt->size); *p = *pict; p->pict_type= AV_PICTURE_TYPE_I; p->key_frame= 1; for(mb_y=0; mb_y<a->mb_height2; mb_y++){ for(mb_x=0; mb_x<a->mb_width2; mb_x++){ dct_get(a, mb_x, mb_y); encode_mb(a, a->block); } } if(a->mb_width2 != a->mb_width){ mb_x= a->mb_width2; for(mb_y=0; mb_y<a->mb_height2; mb_y++){ dct_get(a, mb_x, mb_y); encode_mb(a, a->block); } } if(a->mb_height2 != a->mb_height){ mb_y= a->mb_height2; for(mb_x=0; mb_x<a->mb_width; mb_x++){ dct_get(a, mb_x, mb_y); encode_mb(a, a->block); } } emms_c(); avpriv_align_put_bits(&a->pb); while(put_bits_count(&a->pb)&31) put_bits(&a->pb, 8, 0); size= put_bits_count(&a->pb)/32; if(avctx->codec_id == AV_CODEC_ID_ASV1) a->dsp.bswap_buf((uint32_t*)pkt->data, (uint32_t*)pkt->data, size); else{ int i; for(i=0; i<4*size; i++) pkt->data[i] = ff_reverse[pkt->data[i]]; } pkt->size = size*4; pkt->flags |= AV_PKT_FLAG_KEY; *got_packet = 1; return 0; } static av_cold int encode_init(AVCodecContext *avctx){ ASV1Context * const a = avctx->priv_data; int i; const int scale= avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2; ff_asv_common_init(avctx); if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE; a->inv_qscale= (32*scale*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality; avctx->extradata= av_mallocz(8); avctx->extradata_size=8; ((uint32_t*)avctx->extradata)[0]= av_le2ne32(a->inv_qscale); ((uint32_t*)avctx->extradata)[1]= av_le2ne32(AV_RL32("ASUS")); for(i=0; i<64; i++){ int q= 32*scale*ff_mpeg1_default_intra_matrix[i]; a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q; } return 0; } #if CONFIG_ASV1_ENCODER AVCodec ff_asv1_encoder = { .name = "asv1", .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_ASV1, .priv_data_size = sizeof(ASV1Context), .init = encode_init, .encode2 = encode_frame, .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"), }; #endif #if CONFIG_ASV2_ENCODER AVCodec ff_asv2_encoder = { .name = "asv2", .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_ASV2, .priv_data_size = sizeof(ASV1Context), .init = encode_init, .encode2 = encode_frame, .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"), }; #endif