mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
482 lines
13 KiB
482 lines
13 KiB
/* |
|
* ASUS V1 codec |
|
* Copyright (c) 2003 Michael Niedermayer |
|
* |
|
* This library 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 of the License, or (at your option) any later version. |
|
* |
|
* This library 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 this library; if not, write to the Free Software |
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
|
*/ |
|
|
|
/** |
|
* @file asv1.c |
|
* ASUS V1 codec. |
|
*/ |
|
|
|
#include "avcodec.h" |
|
#include "dsputil.h" |
|
#include "mpegvideo.h" |
|
|
|
//#undef NDEBUG |
|
//#include <assert.h> |
|
|
|
#define VLC_BITS 5 |
|
|
|
typedef struct ASV1Context{ |
|
AVCodecContext *avctx; |
|
DSPContext dsp; |
|
AVFrame picture; |
|
PutBitContext pb; |
|
GetBitContext gb; |
|
ScanTable scantable; |
|
int inv_qscale; |
|
int mb_width; |
|
int mb_height; |
|
int mb_width2; |
|
int mb_height2; |
|
DCTELEM __align8 block[6][64]; |
|
uint16_t __align8 intra_matrix[64]; |
|
int __align8 q_intra_matrix[64]; |
|
uint8_t *bitstream_buffer; |
|
int bitstream_buffer_size; |
|
} ASV1Context; |
|
|
|
static const uint8_t scantab[64]={ |
|
0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19, |
|
0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B, |
|
0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29, |
|
0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D, |
|
0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39, |
|
}; |
|
|
|
static const uint8_t ccp_tab[17][2]={ |
|
{0x2,2}, {0xE,5}, {0xD,5}, {0xC,5}, |
|
{0xB,5}, {0xA,5}, {0x9,5}, {0x8,5}, |
|
{0x7,5}, {0x6,5}, {0x5,5}, {0x4,5}, |
|
{0x3,5}, {0x2,5}, {0x1,5}, {0x3,2}, |
|
{0xF,5}, //EOB |
|
}; |
|
|
|
static const uint8_t level_tab[7][2]={ |
|
{3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4} |
|
}; |
|
|
|
static VLC ccp_vlc; |
|
static VLC level_vlc; |
|
|
|
static void init_vlcs(ASV1Context *a){ |
|
static int done = 0; |
|
|
|
if (!done) { |
|
done = 1; |
|
|
|
init_vlc(&ccp_vlc, VLC_BITS, 17, |
|
&ccp_tab[0][1], 2, 1, |
|
&ccp_tab[0][0], 2, 1); |
|
init_vlc(&level_vlc, VLC_BITS, 7, |
|
&level_tab[0][1], 2, 1, |
|
&level_tab[0][0], 2, 1); |
|
} |
|
} |
|
|
|
static inline int get_level(GetBitContext *gb){ |
|
int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1); |
|
|
|
if(code==3) return get_sbits(gb, 8); |
|
else return code - 3; |
|
} |
|
|
|
#ifdef CONFIG_ENCODERS |
|
|
|
static inline void put_level(PutBitContext *pb, int level){ |
|
unsigned int index= level + 3; |
|
|
|
if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]); |
|
else{ |
|
put_bits(pb, level_tab[3][1], level_tab[3][0]); |
|
put_bits(pb, 8, level&0xFF); |
|
} |
|
} |
|
|
|
#endif //CONFIG_ENCODERS |
|
|
|
static inline int decode_block(ASV1Context *a, DCTELEM block[64]){ |
|
int i; |
|
|
|
block[0]= 8*get_bits(&a->gb, 8); |
|
|
|
for(i=0; i<11; i++){ |
|
const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1); |
|
|
|
if(ccp){ |
|
if(ccp == 16) break; |
|
if(ccp < 0 || i>=10){ |
|
printf("coded coeff pattern damaged\n"); |
|
return -1; |
|
} |
|
|
|
if(ccp&1) block[a->scantable.permutated[4*i+0]]= (get_level(&a->gb) * a->intra_matrix[4*i+0])>>4; |
|
if(ccp&2) block[a->scantable.permutated[4*i+1]]= (get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;; |
|
if(ccp&4) block[a->scantable.permutated[4*i+2]]= (get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;; |
|
if(ccp&8) block[a->scantable.permutated[4*i+3]]= (get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_ENCODERS |
|
|
|
static inline void 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= scantab[4*i]; |
|
int ccp=0; |
|
|
|
if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 1; |
|
if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 2; |
|
if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 4; |
|
if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 8; |
|
|
|
if(ccp){ |
|
for(;nc_count; nc_count--) |
|
put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]); |
|
|
|
put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]); |
|
|
|
if(ccp&1) put_level(&a->pb, block[index + 0]); |
|
if(ccp&2) put_level(&a->pb, block[index + 8]); |
|
if(ccp&4) put_level(&a->pb, block[index + 1]); |
|
if(ccp&8) put_level(&a->pb, block[index + 9]); |
|
}else{ |
|
nc_count++; |
|
} |
|
} |
|
put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]); |
|
} |
|
|
|
#endif //CONFIG_ENCODERS |
|
|
|
static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){ |
|
int i; |
|
|
|
a->dsp.clear_blocks(block[0]); |
|
|
|
for(i=0; i<6; i++){ |
|
if( decode_block(a, block[i]) < 0) |
|
return -1; |
|
} |
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_ENCODERS |
|
|
|
static inline void encode_mb(ASV1Context *a, DCTELEM block[6][64]){ |
|
int i; |
|
|
|
for(i=0; i<6; i++){ |
|
encode_block(a, block[i]); |
|
} |
|
} |
|
|
|
#endif //CONFIG_ENCODERS |
|
|
|
static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){ |
|
DCTELEM (*block)[64]= a->block; |
|
int linesize= a->picture.linesize[0]; |
|
|
|
uint8_t *dest_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16; |
|
uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8; |
|
uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8; |
|
|
|
a->dsp.idct_put(dest_y , linesize, block[0]); |
|
a->dsp.idct_put(dest_y + 8, linesize, block[1]); |
|
a->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]); |
|
a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]); |
|
|
|
if(!(a->avctx->flags&CODEC_FLAG_GRAY)){ |
|
a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]); |
|
a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]); |
|
} |
|
} |
|
|
|
#ifdef CONFIG_ENCODERS |
|
|
|
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]); |
|
} |
|
} |
|
|
|
#endif //CONFIG_ENCODERS |
|
|
|
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; |
|
|
|
*data_size = 0; |
|
|
|
/* special case for last picture */ |
|
if (buf_size == 0) { |
|
return 0; |
|
} |
|
|
|
if(p->data[0]) |
|
avctx->release_buffer(avctx, p); |
|
|
|
p->reference= 0; |
|
if(avctx->get_buffer(avctx, p) < 0){ |
|
fprintf(stderr, "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); |
|
a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (uint32_t*)buf, buf_size/4); |
|
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 |
|
|
|
p->quality= (32 + a->inv_qscale/2)/a->inv_qscale; |
|
memset(p->qscale_table, p->quality, p->qstride*a->mb_height); |
|
|
|
*picture= *(AVFrame*)&a->picture; |
|
*data_size = sizeof(AVPicture); |
|
|
|
emms_c(); |
|
|
|
return (get_bits_count(&a->gb)+31)/32*4; |
|
} |
|
|
|
#ifdef CONFIG_ENCODERS |
|
|
|
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, NULL, NULL); |
|
|
|
*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(get_bit_count(&a->pb)&31) |
|
put_bits(&a->pb, 8, 0); |
|
|
|
size= get_bit_count(&a->pb)/32; |
|
|
|
a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size); |
|
|
|
return size*4; |
|
} |
|
|
|
#endif //CONFIG_ENCODERS |
|
|
|
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; |
|
|
|
common_init(avctx); |
|
init_vlcs(a); |
|
ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab); |
|
|
|
a->inv_qscale= le2me_32(((uint32_t*)avctx->extradata)[0]); |
|
if(a->inv_qscale == 0){ |
|
printf("illegal qscale 0\n"); |
|
a->inv_qscale= 6; |
|
} |
|
|
|
for(i=0; i<64; i++){ |
|
int index= scantab[i]; |
|
a->intra_matrix[i]= 64*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale; |
|
} |
|
|
|
p->qstride= a->mb_width; |
|
p->qscale_table= av_mallocz( p->qstride * a->mb_height); |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_ENCODERS |
|
|
|
static int encode_init(AVCodecContext *avctx){ |
|
ASV1Context * const a = avctx->priv_data; |
|
int i; |
|
|
|
common_init(avctx); |
|
|
|
if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE; |
|
|
|
a->inv_qscale= (32*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*ff_mpeg1_default_intra_matrix[i]; |
|
a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
#endif //CONFIG_ENCODERS |
|
|
|
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; |
|
|
|
avcodec_default_free_buffers(avctx); |
|
|
|
return 0; |
|
} |
|
|
|
AVCodec asv1_decoder = { |
|
"asv1", |
|
CODEC_TYPE_VIDEO, |
|
CODEC_ID_ASV1, |
|
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, |
|
}; |
|
|
|
#endif //CONFIG_ENCODERS
|
|
|