mirror of
https://github.com/nyanmisaka/ffmpeg-rockchip.git
synced 2025-10-31 12:36:41 +08:00
647 lines
19 KiB
C
647 lines
19 KiB
C
/*
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* ASUS V1/V2 codec
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* Copyright (c) 2003 Michael Niedermayer
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*
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* This library 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 of the License, or (at your option) any later version.
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*
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* This library 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 this library; 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 asv1.c
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* ASUS V1/V2 codec.
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*/
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
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//#undef NDEBUG
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//#include <assert.h>
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#define VLC_BITS 6
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#define ASV2_LEVEL_VLC_BITS 10
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typedef struct ASV1Context{
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AVCodecContext *avctx;
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DSPContext dsp;
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AVFrame picture;
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PutBitContext pb;
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GetBitContext gb;
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ScanTable scantable;
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int inv_qscale;
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int mb_width;
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int mb_height;
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int mb_width2;
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int mb_height2;
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DCTELEM __align8 block[6][64];
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uint16_t __align8 intra_matrix[64];
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int __align8 q_intra_matrix[64];
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uint8_t *bitstream_buffer;
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unsigned int bitstream_buffer_size;
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} ASV1Context;
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static const uint8_t scantab[64]={
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0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19,
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0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B,
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0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29,
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0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D,
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0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39,
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0x16,0x1E,0x17,0x1F,0x24,0x2C,0x25,0x2D,
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0x32,0x3A,0x33,0x3B,0x26,0x2E,0x27,0x2F,
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0x34,0x3C,0x35,0x3D,0x36,0x3E,0x37,0x3F,
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};
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static const uint8_t ccp_tab[17][2]={
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{0x2,2}, {0x7,5}, {0xB,5}, {0x3,5},
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{0xD,5}, {0x5,5}, {0x9,5}, {0x1,5},
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{0xE,5}, {0x6,5}, {0xA,5}, {0x2,5},
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{0xC,5}, {0x4,5}, {0x8,5}, {0x3,2},
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{0xF,5}, //EOB
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};
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static const uint8_t level_tab[7][2]={
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{3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}
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};
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static const uint8_t dc_ccp_tab[8][2]={
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{0x1,2}, {0xD,4}, {0xF,4}, {0xC,4},
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{0x5,3}, {0xE,4}, {0x4,3}, {0x0,2},
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};
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static const uint8_t ac_ccp_tab[16][2]={
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{0x00,2}, {0x3B,6}, {0x0A,4}, {0x3A,6},
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{0x02,3}, {0x39,6}, {0x3C,6}, {0x38,6},
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{0x03,3}, {0x3D,6}, {0x08,4}, {0x1F,5},
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{0x09,4}, {0x0B,4}, {0x0D,4}, {0x0C,4},
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};
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static const uint8_t asv2_level_tab[63][2]={
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{0x3F,10},{0x2F,10},{0x37,10},{0x27,10},{0x3B,10},{0x2B,10},{0x33,10},{0x23,10},
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{0x3D,10},{0x2D,10},{0x35,10},{0x25,10},{0x39,10},{0x29,10},{0x31,10},{0x21,10},
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{0x1F, 8},{0x17, 8},{0x1B, 8},{0x13, 8},{0x1D, 8},{0x15, 8},{0x19, 8},{0x11, 8},
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{0x0F, 6},{0x0B, 6},{0x0D, 6},{0x09, 6},
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{0x07, 4},{0x05, 4},
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{0x03, 2},
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{0x00, 5},
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{0x02, 2},
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{0x04, 4},{0x06, 4},
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{0x08, 6},{0x0C, 6},{0x0A, 6},{0x0E, 6},
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{0x10, 8},{0x18, 8},{0x14, 8},{0x1C, 8},{0x12, 8},{0x1A, 8},{0x16, 8},{0x1E, 8},
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{0x20,10},{0x30,10},{0x28,10},{0x38,10},{0x24,10},{0x34,10},{0x2C,10},{0x3C,10},
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{0x22,10},{0x32,10},{0x2A,10},{0x3A,10},{0x26,10},{0x36,10},{0x2E,10},{0x3E,10},
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};
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static VLC ccp_vlc;
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static VLC level_vlc;
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static VLC dc_ccp_vlc;
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static VLC ac_ccp_vlc;
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static VLC asv2_level_vlc;
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static void init_vlcs(ASV1Context *a){
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static int done = 0;
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if (!done) {
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done = 1;
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init_vlc(&ccp_vlc, VLC_BITS, 17,
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&ccp_tab[0][1], 2, 1,
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&ccp_tab[0][0], 2, 1, 1);
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init_vlc(&dc_ccp_vlc, VLC_BITS, 8,
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&dc_ccp_tab[0][1], 2, 1,
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&dc_ccp_tab[0][0], 2, 1, 1);
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init_vlc(&ac_ccp_vlc, VLC_BITS, 16,
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&ac_ccp_tab[0][1], 2, 1,
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&ac_ccp_tab[0][0], 2, 1, 1);
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init_vlc(&level_vlc, VLC_BITS, 7,
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&level_tab[0][1], 2, 1,
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&level_tab[0][0], 2, 1, 1);
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init_vlc(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
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&asv2_level_tab[0][1], 2, 1,
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&asv2_level_tab[0][0], 2, 1, 1);
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}
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}
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//FIXME write a reversed bitstream reader to avoid the double reverse
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static inline int asv2_get_bits(GetBitContext *gb, int n){
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return ff_reverse[ get_bits(gb, n) << (8-n) ];
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}
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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 int asv1_get_level(GetBitContext *gb){
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int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
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if(code==3) return get_sbits(gb, 8);
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else return code - 3;
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}
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static inline int asv2_get_level(GetBitContext *gb){
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int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
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if(code==31) return (int8_t)asv2_get_bits(gb, 8);
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else return code - 31;
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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, level_tab[index][1], level_tab[index][0]);
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else{
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put_bits(pb, level_tab[3][1], level_tab[3][0]);
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put_bits(pb, 8, level&0xFF);
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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, asv2_level_tab[index][1], asv2_level_tab[index][0]);
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else{
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put_bits(pb, asv2_level_tab[31][1], 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 int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){
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int i;
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block[0]= 8*get_bits(&a->gb, 8);
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for(i=0; i<11; i++){
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const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
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if(ccp){
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if(ccp == 16) break;
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if(ccp < 0 || i>=10){
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av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
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return -1;
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}
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if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
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if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
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if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
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if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
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}
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}
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return 0;
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}
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static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){
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int i, count, ccp;
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count= asv2_get_bits(&a->gb, 4);
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block[0]= 8*asv2_get_bits(&a->gb, 8);
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ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
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if(ccp){
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if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4;
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if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4;
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if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4;
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}
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for(i=1; i<count+1; i++){
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const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
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if(ccp){
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if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
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if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
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if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
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if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
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}
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}
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return 0;
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}
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static inline void asv1_encode_block(ASV1Context *a, DCTELEM 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= 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, ccp_tab[0][1], ccp_tab[0][0]);
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put_bits(&a->pb, ccp_tab[ccp][1], 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, ccp_tab[16][1], ccp_tab[16][0]);
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}
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static inline void asv2_encode_block(ASV1Context *a, DCTELEM 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= 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= 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(i) put_bits(&a->pb, ac_ccp_tab[ccp][1], ac_ccp_tab[ccp][0]);
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else put_bits(&a->pb, dc_ccp_tab[ccp][1], 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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static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
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int i;
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a->dsp.clear_blocks(block[0]);
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if(a->avctx->codec_id == CODEC_ID_ASV1){
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for(i=0; i<6; i++){
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if( asv1_decode_block(a, block[i]) < 0)
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return -1;
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}
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}else{
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for(i=0; i<6; i++){
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if( asv2_decode_block(a, block[i]) < 0)
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return -1;
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}
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}
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return 0;
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}
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static inline int encode_mb(ASV1Context *a, DCTELEM 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) < 30*16*16*3/2/8){
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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 == 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 idct_put(ASV1Context *a, int mb_x, int mb_y){
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DCTELEM (*block)[64]= a->block;
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int linesize= a->picture.linesize[0];
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uint8_t *dest_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
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uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
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uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
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a->dsp.idct_put(dest_y , linesize, block[0]);
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a->dsp.idct_put(dest_y + 8, linesize, block[1]);
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a->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]);
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a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
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if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
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a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
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a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
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}
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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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DCTELEM (*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]);
|
|
for(i=4; i<6; i++)
|
|
a->dsp.fdct(block[i]);
|
|
}
|
|
}
|
|
|
|
static int decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
uint8_t *buf, int buf_size)
|
|
{
|
|
ASV1Context * const a = avctx->priv_data;
|
|
AVFrame *picture = data;
|
|
AVFrame * const p= (AVFrame*)&a->picture;
|
|
int mb_x, mb_y;
|
|
|
|
if(p->data[0])
|
|
avctx->release_buffer(avctx, p);
|
|
|
|
p->reference= 0;
|
|
if(avctx->get_buffer(avctx, p) < 0){
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
p->pict_type= I_TYPE;
|
|
p->key_frame= 1;
|
|
|
|
a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
|
|
if(avctx->codec_id == CODEC_ID_ASV1)
|
|
a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (uint32_t*)buf, buf_size/4);
|
|
else{
|
|
int i;
|
|
for(i=0; i<buf_size; i++)
|
|
a->bitstream_buffer[i]= ff_reverse[ buf[i] ];
|
|
}
|
|
|
|
init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
|
|
|
|
for(mb_y=0; mb_y<a->mb_height2; mb_y++){
|
|
for(mb_x=0; mb_x<a->mb_width2; mb_x++){
|
|
if( decode_mb(a, a->block) <0)
|
|
return -1;
|
|
|
|
idct_put(a, mb_x, mb_y);
|
|
}
|
|
}
|
|
|
|
if(a->mb_width2 != a->mb_width){
|
|
mb_x= a->mb_width2;
|
|
for(mb_y=0; mb_y<a->mb_height2; mb_y++){
|
|
if( decode_mb(a, a->block) <0)
|
|
return -1;
|
|
|
|
idct_put(a, mb_x, mb_y);
|
|
}
|
|
}
|
|
|
|
if(a->mb_height2 != a->mb_height){
|
|
mb_y= a->mb_height2;
|
|
for(mb_x=0; mb_x<a->mb_width; mb_x++){
|
|
if( decode_mb(a, a->block) <0)
|
|
return -1;
|
|
|
|
idct_put(a, mb_x, mb_y);
|
|
}
|
|
}
|
|
#if 0
|
|
int i;
|
|
printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));
|
|
for(i=get_bits_count(&a->gb); i<8*buf_size; i++){
|
|
printf("%d", get_bits1(&a->gb));
|
|
}
|
|
|
|
for(i=0; i<s->avctx->extradata_size; i++){
|
|
printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]);
|
|
}
|
|
#endif
|
|
|
|
*picture= *(AVFrame*)&a->picture;
|
|
*data_size = sizeof(AVPicture);
|
|
|
|
emms_c();
|
|
|
|
return (get_bits_count(&a->gb)+31)/32*4;
|
|
}
|
|
|
|
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
|
|
ASV1Context * const a = avctx->priv_data;
|
|
AVFrame *pict = data;
|
|
AVFrame * const p= (AVFrame*)&a->picture;
|
|
int size;
|
|
int mb_x, mb_y;
|
|
|
|
init_put_bits(&a->pb, buf, buf_size);
|
|
|
|
*p = *pict;
|
|
p->pict_type= I_TYPE;
|
|
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();
|
|
|
|
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 == CODEC_ID_ASV1)
|
|
a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);
|
|
else{
|
|
int i;
|
|
for(i=0; i<4*size; i++)
|
|
buf[i]= ff_reverse[ buf[i] ];
|
|
}
|
|
|
|
return size*4;
|
|
}
|
|
|
|
static void common_init(AVCodecContext *avctx){
|
|
ASV1Context * const a = avctx->priv_data;
|
|
|
|
dsputil_init(&a->dsp, avctx);
|
|
|
|
a->mb_width = (avctx->width + 15) / 16;
|
|
a->mb_height = (avctx->height + 15) / 16;
|
|
a->mb_width2 = (avctx->width + 0) / 16;
|
|
a->mb_height2 = (avctx->height + 0) / 16;
|
|
|
|
avctx->coded_frame= (AVFrame*)&a->picture;
|
|
a->avctx= avctx;
|
|
}
|
|
|
|
static int decode_init(AVCodecContext *avctx){
|
|
ASV1Context * const a = avctx->priv_data;
|
|
AVFrame *p= (AVFrame*)&a->picture;
|
|
int i;
|
|
const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
|
|
|
|
common_init(avctx);
|
|
init_vlcs(a);
|
|
ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);
|
|
avctx->pix_fmt= PIX_FMT_YUV420P;
|
|
|
|
a->inv_qscale= ((uint8_t*)avctx->extradata)[0];
|
|
if(a->inv_qscale == 0){
|
|
av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
|
|
if(avctx->codec_id == CODEC_ID_ASV1)
|
|
a->inv_qscale= 6;
|
|
else
|
|
a->inv_qscale= 10;
|
|
}
|
|
|
|
for(i=0; i<64; i++){
|
|
int index= scantab[i];
|
|
|
|
a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
|
|
}
|
|
|
|
p->qstride= a->mb_width;
|
|
p->qscale_table= av_malloc( p->qstride * a->mb_height);
|
|
p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;
|
|
memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int encode_init(AVCodecContext *avctx){
|
|
ASV1Context * const a = avctx->priv_data;
|
|
int i;
|
|
const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
|
|
|
|
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]= le2me_32(a->inv_qscale);
|
|
((uint32_t*)avctx->extradata)[1]= le2me_32(ff_get_fourcc("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;
|
|
}
|
|
|
|
static int decode_end(AVCodecContext *avctx){
|
|
ASV1Context * const a = avctx->priv_data;
|
|
|
|
av_freep(&a->bitstream_buffer);
|
|
av_freep(&a->picture.qscale_table);
|
|
a->bitstream_buffer_size=0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec asv1_decoder = {
|
|
"asv1",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_ASV1,
|
|
sizeof(ASV1Context),
|
|
decode_init,
|
|
NULL,
|
|
decode_end,
|
|
decode_frame,
|
|
CODEC_CAP_DR1,
|
|
};
|
|
|
|
AVCodec asv2_decoder = {
|
|
"asv2",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_ASV2,
|
|
sizeof(ASV1Context),
|
|
decode_init,
|
|
NULL,
|
|
decode_end,
|
|
decode_frame,
|
|
CODEC_CAP_DR1,
|
|
};
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
|
|
AVCodec asv1_encoder = {
|
|
"asv1",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_ASV1,
|
|
sizeof(ASV1Context),
|
|
encode_init,
|
|
encode_frame,
|
|
//encode_end,
|
|
};
|
|
|
|
AVCodec asv2_encoder = {
|
|
"asv2",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_ASV2,
|
|
sizeof(ASV1Context),
|
|
encode_init,
|
|
encode_frame,
|
|
//encode_end,
|
|
};
|
|
|
|
#endif //CONFIG_ENCODERS
|