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ffmpeg/libavcodec/asvenc.c

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/*
* Copyright (c) 2003 Michael Niedermayer
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; 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 "internal.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, int16_t 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, int16_t 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;
av_assert2(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, int16_t 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){
int16_t (*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 ((ret = ff_alloc_packet2(avctx, pkt, a->mb_height*a->mb_width*MAX_MB_SIZE +
FF_MIN_BUFFER_SIZE)) < 0)
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
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