2 * Copyright (c) 2003 Michael Niedermayer
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #include "libavutil/common.h"
27 #include "libavutil/mem.h"
32 #include "mpeg12data.h"
34 static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
35 put_bits(pb, n, av_reverse[ v << (8-n) ]);
38 static inline void asv1_put_level(PutBitContext *pb, int level){
39 unsigned int index= level + 3;
41 if(index <= 6) put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]);
43 put_bits(pb, ff_asv_level_tab[3][1], ff_asv_level_tab[3][0]);
44 put_sbits(pb, 8, level);
48 static inline void asv2_put_level(PutBitContext *pb, int level){
49 unsigned int index= level + 31;
51 if(index <= 62) put_bits(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]);
53 put_bits(pb, ff_asv2_level_tab[31][1], ff_asv2_level_tab[31][0]);
54 asv2_put_bits(pb, 8, level&0xFF);
58 static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){
62 put_bits(&a->pb, 8, (block[0] + 32)>>6);
66 const int index = ff_asv_scantab[4*i];
69 if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
70 if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
71 if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
72 if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
75 for(;nc_count; nc_count--)
76 put_bits(&a->pb, ff_asv_ccp_tab[0][1], ff_asv_ccp_tab[0][0]);
78 put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][0]);
80 if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);
81 if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);
82 if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);
83 if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);
88 put_bits(&a->pb, ff_asv_ccp_tab[16][1], ff_asv_ccp_tab[16][0]);
91 static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){
95 for(count=63; count>3; count--){
96 const int index = ff_asv_scantab[count];
98 if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 )
104 asv2_put_bits(&a->pb, 4, count);
105 asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);
108 for(i=0; i<=count; i++){
109 const int index = ff_asv_scantab[4*i];
112 if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
113 if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
114 if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
115 if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
117 av_assert2(i || ccp<8);
118 if(i) put_bits(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]);
119 else put_bits(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]);
122 if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);
123 if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);
124 if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);
125 if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);
130 #define MAX_MB_SIZE (30*16*16*3/2/8)
132 static inline int encode_mb(ASV1Context *a, DCTELEM block[6][64]){
135 if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < MAX_MB_SIZE) {
136 av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
140 if(a->avctx->codec_id == AV_CODEC_ID_ASV1){
142 asv1_encode_block(a, block[i]);
145 asv2_encode_block(a, block[i]);
150 static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){
151 DCTELEM (*block)[64]= a->block;
152 int linesize= a->picture.linesize[0];
155 uint8_t *ptr_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
156 uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
157 uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
159 a->dsp.get_pixels(block[0], ptr_y , linesize);
160 a->dsp.get_pixels(block[1], ptr_y + 8, linesize);
161 a->dsp.get_pixels(block[2], ptr_y + 8*linesize , linesize);
162 a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);
164 a->dsp.fdct(block[i]);
166 if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
167 a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);
168 a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);
170 a->dsp.fdct(block[i]);
174 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
175 const AVFrame *pict, int *got_packet)
177 ASV1Context * const a = avctx->priv_data;
178 AVFrame * const p= &a->picture;
182 if ((ret = ff_alloc_packet2(avctx, pkt, a->mb_height*a->mb_width*MAX_MB_SIZE +
183 FF_MIN_BUFFER_SIZE)) < 0)
186 init_put_bits(&a->pb, pkt->data, pkt->size);
189 p->pict_type= AV_PICTURE_TYPE_I;
192 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
193 for(mb_x=0; mb_x<a->mb_width2; mb_x++){
194 dct_get(a, mb_x, mb_y);
195 encode_mb(a, a->block);
199 if(a->mb_width2 != a->mb_width){
201 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
202 dct_get(a, mb_x, mb_y);
203 encode_mb(a, a->block);
207 if(a->mb_height2 != a->mb_height){
209 for(mb_x=0; mb_x<a->mb_width; mb_x++){
210 dct_get(a, mb_x, mb_y);
211 encode_mb(a, a->block);
216 avpriv_align_put_bits(&a->pb);
217 while(put_bits_count(&a->pb)&31)
218 put_bits(&a->pb, 8, 0);
220 size= put_bits_count(&a->pb)/32;
222 if(avctx->codec_id == AV_CODEC_ID_ASV1)
223 a->dsp.bswap_buf((uint32_t*)pkt->data, (uint32_t*)pkt->data, size);
226 for(i=0; i<4*size; i++)
227 pkt->data[i] = av_reverse[pkt->data[i]];
231 pkt->flags |= AV_PKT_FLAG_KEY;
237 static av_cold int encode_init(AVCodecContext *avctx){
238 ASV1Context * const a = avctx->priv_data;
240 const int scale= avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
242 ff_asv_common_init(avctx);
244 if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
246 a->inv_qscale= (32*scale*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality;
248 avctx->extradata= av_mallocz(8);
249 avctx->extradata_size=8;
250 ((uint32_t*)avctx->extradata)[0]= av_le2ne32(a->inv_qscale);
251 ((uint32_t*)avctx->extradata)[1]= av_le2ne32(AV_RL32("ASUS"));
254 int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
255 a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
261 #if CONFIG_ASV1_ENCODER
262 AVCodec ff_asv1_encoder = {
264 .type = AVMEDIA_TYPE_VIDEO,
265 .id = AV_CODEC_ID_ASV1,
266 .priv_data_size = sizeof(ASV1Context),
268 .encode2 = encode_frame,
269 .pix_fmts = (const enum PixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
270 .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
274 #if CONFIG_ASV2_ENCODER
275 AVCodec ff_asv2_encoder = {
277 .type = AVMEDIA_TYPE_VIDEO,
278 .id = AV_CODEC_ID_ASV2,
279 .priv_data_size = sizeof(ASV1Context),
281 .encode2 = encode_frame,
282 .pix_fmts = (const enum PixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
283 .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),