forked from KolibriOS/kolibrios
289 lines
9.1 KiB
C
289 lines
9.1 KiB
C
/*
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* Copyright (c) 2003 Michael Niedermayer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* ASUS V1/V2 encoder.
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*/
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#include "libavutil/attributes.h"
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#include "libavutil/mem.h"
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#include "asv.h"
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#include "avcodec.h"
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#include "internal.h"
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#include "mathops.h"
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#include "mpeg12data.h"
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static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
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put_bits(pb, n, ff_reverse[ v << (8-n) ]);
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}
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static inline void asv1_put_level(PutBitContext *pb, int level){
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unsigned int index= level + 3;
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if(index <= 6) put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]);
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else{
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put_bits(pb, ff_asv_level_tab[3][1], ff_asv_level_tab[3][0]);
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put_sbits(pb, 8, level);
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}
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}
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static inline void asv2_put_level(PutBitContext *pb, int level){
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unsigned int index= level + 31;
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if(index <= 62) put_bits(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]);
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else{
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put_bits(pb, ff_asv2_level_tab[31][1], ff_asv2_level_tab[31][0]);
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asv2_put_bits(pb, 8, level&0xFF);
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}
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}
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static inline void asv1_encode_block(ASV1Context *a, int16_t block[64]){
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int i;
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int nc_count=0;
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put_bits(&a->pb, 8, (block[0] + 32)>>6);
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block[0]= 0;
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for(i=0; i<10; i++){
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const int index = ff_asv_scantab[4*i];
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int ccp=0;
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if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
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if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
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if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
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if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
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if(ccp){
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for(;nc_count; nc_count--)
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put_bits(&a->pb, ff_asv_ccp_tab[0][1], ff_asv_ccp_tab[0][0]);
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put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][0]);
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if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);
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if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);
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if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);
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if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);
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}else{
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nc_count++;
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}
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}
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put_bits(&a->pb, ff_asv_ccp_tab[16][1], ff_asv_ccp_tab[16][0]);
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}
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static inline void asv2_encode_block(ASV1Context *a, int16_t block[64]){
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int i;
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int count=0;
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for(count=63; count>3; count--){
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const int index = ff_asv_scantab[count];
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if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 )
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break;
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}
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count >>= 2;
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asv2_put_bits(&a->pb, 4, count);
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asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);
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block[0]= 0;
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for(i=0; i<=count; i++){
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const int index = ff_asv_scantab[4*i];
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int ccp=0;
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if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
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if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
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if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
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if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
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av_assert2(i || ccp<8);
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if(i) put_bits(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]);
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else put_bits(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]);
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if(ccp){
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if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);
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if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);
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if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);
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if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);
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}
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}
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}
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#define MAX_MB_SIZE (30*16*16*3/2/8)
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static inline int encode_mb(ASV1Context *a, int16_t block[6][64]){
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int i;
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if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < MAX_MB_SIZE) {
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av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
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return -1;
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}
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if(a->avctx->codec_id == AV_CODEC_ID_ASV1){
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for(i=0; i<6; i++)
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asv1_encode_block(a, block[i]);
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}else{
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for(i=0; i<6; i++)
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asv2_encode_block(a, block[i]);
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}
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return 0;
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}
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static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){
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int16_t (*block)[64]= a->block;
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int linesize= a->picture.linesize[0];
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int i;
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uint8_t *ptr_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
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uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
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uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
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a->dsp.get_pixels(block[0], ptr_y , linesize);
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a->dsp.get_pixels(block[1], ptr_y + 8, linesize);
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a->dsp.get_pixels(block[2], ptr_y + 8*linesize , linesize);
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a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);
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for(i=0; i<4; i++)
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a->dsp.fdct(block[i]);
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if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
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a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);
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a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);
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for(i=4; i<6; i++)
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a->dsp.fdct(block[i]);
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}
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}
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static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *pict, int *got_packet)
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{
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ASV1Context * const a = avctx->priv_data;
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AVFrame * const p= &a->picture;
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int size, ret;
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int mb_x, mb_y;
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if ((ret = ff_alloc_packet2(avctx, pkt, a->mb_height*a->mb_width*MAX_MB_SIZE +
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FF_MIN_BUFFER_SIZE)) < 0)
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return ret;
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init_put_bits(&a->pb, pkt->data, pkt->size);
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*p = *pict;
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p->pict_type= AV_PICTURE_TYPE_I;
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p->key_frame= 1;
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for(mb_y=0; mb_y<a->mb_height2; mb_y++){
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for(mb_x=0; mb_x<a->mb_width2; mb_x++){
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dct_get(a, mb_x, mb_y);
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encode_mb(a, a->block);
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}
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}
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if(a->mb_width2 != a->mb_width){
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mb_x= a->mb_width2;
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for(mb_y=0; mb_y<a->mb_height2; mb_y++){
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dct_get(a, mb_x, mb_y);
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encode_mb(a, a->block);
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}
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}
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if(a->mb_height2 != a->mb_height){
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mb_y= a->mb_height2;
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for(mb_x=0; mb_x<a->mb_width; mb_x++){
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dct_get(a, mb_x, mb_y);
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encode_mb(a, a->block);
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}
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}
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emms_c();
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avpriv_align_put_bits(&a->pb);
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while(put_bits_count(&a->pb)&31)
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put_bits(&a->pb, 8, 0);
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size= put_bits_count(&a->pb)/32;
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if(avctx->codec_id == AV_CODEC_ID_ASV1)
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a->dsp.bswap_buf((uint32_t*)pkt->data, (uint32_t*)pkt->data, size);
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else{
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int i;
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for(i=0; i<4*size; i++)
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pkt->data[i] = ff_reverse[pkt->data[i]];
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}
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pkt->size = size*4;
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pkt->flags |= AV_PKT_FLAG_KEY;
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*got_packet = 1;
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return 0;
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}
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static av_cold int encode_init(AVCodecContext *avctx){
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ASV1Context * const a = avctx->priv_data;
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int i;
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const int scale= avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
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ff_asv_common_init(avctx);
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if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
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a->inv_qscale= (32*scale*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality;
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avctx->extradata= av_mallocz(8);
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avctx->extradata_size=8;
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((uint32_t*)avctx->extradata)[0]= av_le2ne32(a->inv_qscale);
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((uint32_t*)avctx->extradata)[1]= av_le2ne32(AV_RL32("ASUS"));
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for(i=0; i<64; i++){
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int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
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a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
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}
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return 0;
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}
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#if CONFIG_ASV1_ENCODER
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AVCodec ff_asv1_encoder = {
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.name = "asv1",
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.long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_ASV1,
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.priv_data_size = sizeof(ASV1Context),
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.init = encode_init,
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.encode2 = encode_frame,
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.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_NONE },
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};
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#endif
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#if CONFIG_ASV2_ENCODER
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AVCodec ff_asv2_encoder = {
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.name = "asv2",
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.long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_ASV2,
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.priv_data_size = sizeof(ASV1Context),
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.init = encode_init,
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.encode2 = encode_frame,
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.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_NONE },
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};
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#endif
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