lavc: fix decode_frame() third parameter semantics for video decoders
[libav.git] / libavcodec / asvdec.c
1 /*
2 * Copyright (c) 2003 Michael Niedermayer
3 *
4 * This file is part of Libav.
5 *
6 * Libav 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.
10 *
11 * Libav 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.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file
23 * ASUS V1/V2 decoder.
24 */
25
26 #include "libavutil/attributes.h"
27 #include "libavutil/mem.h"
28
29 #include "asv.h"
30 #include "avcodec.h"
31 #include "put_bits.h"
32 #include "dsputil.h"
33 #include "internal.h"
34 #include "mathops.h"
35 #include "mpeg12data.h"
36
37 //#undef NDEBUG
38 //#include <assert.h>
39
40 #define VLC_BITS 6
41 #define ASV2_LEVEL_VLC_BITS 10
42
43 static VLC ccp_vlc;
44 static VLC level_vlc;
45 static VLC dc_ccp_vlc;
46 static VLC ac_ccp_vlc;
47 static VLC asv2_level_vlc;
48
49 static av_cold void init_vlcs(ASV1Context *a){
50 static int done = 0;
51
52 if (!done) {
53 done = 1;
54
55 INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,
56 &ff_asv_ccp_tab[0][1], 2, 1,
57 &ff_asv_ccp_tab[0][0], 2, 1, 64);
58 INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,
59 &ff_asv_dc_ccp_tab[0][1], 2, 1,
60 &ff_asv_dc_ccp_tab[0][0], 2, 1, 64);
61 INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,
62 &ff_asv_ac_ccp_tab[0][1], 2, 1,
63 &ff_asv_ac_ccp_tab[0][0], 2, 1, 64);
64 INIT_VLC_STATIC(&level_vlc, VLC_BITS, 7,
65 &ff_asv_level_tab[0][1], 2, 1,
66 &ff_asv_level_tab[0][0], 2, 1, 64);
67 INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
68 &ff_asv2_level_tab[0][1], 2, 1,
69 &ff_asv2_level_tab[0][0], 2, 1, 1024);
70 }
71 }
72
73 //FIXME write a reversed bitstream reader to avoid the double reverse
74 static inline int asv2_get_bits(GetBitContext *gb, int n){
75 return ff_reverse[ get_bits(gb, n) << (8-n) ];
76 }
77
78 static inline int asv1_get_level(GetBitContext *gb){
79 int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
80
81 if(code==3) return get_sbits(gb, 8);
82 else return code - 3;
83 }
84
85 static inline int asv2_get_level(GetBitContext *gb){
86 int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
87
88 if(code==31) return (int8_t)asv2_get_bits(gb, 8);
89 else return code - 31;
90 }
91
92 static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){
93 int i;
94
95 block[0]= 8*get_bits(&a->gb, 8);
96
97 for(i=0; i<11; i++){
98 const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
99
100 if(ccp){
101 if(ccp == 16) break;
102 if(ccp < 0 || i>=10){
103 av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
104 return -1;
105 }
106
107 if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
108 if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
109 if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
110 if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
111 }
112 }
113
114 return 0;
115 }
116
117 static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){
118 int i, count, ccp;
119
120 count= asv2_get_bits(&a->gb, 4);
121
122 block[0]= 8*asv2_get_bits(&a->gb, 8);
123
124 ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
125 if(ccp){
126 if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4;
127 if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4;
128 if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4;
129 }
130
131 for(i=1; i<count+1; i++){
132 const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
133
134 if(ccp){
135 if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
136 if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
137 if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
138 if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
139 }
140 }
141
142 return 0;
143 }
144
145 static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
146 int i;
147
148 a->dsp.clear_blocks(block[0]);
149
150 if(a->avctx->codec_id == AV_CODEC_ID_ASV1){
151 for(i=0; i<6; i++){
152 if( asv1_decode_block(a, block[i]) < 0)
153 return -1;
154 }
155 }else{
156 for(i=0; i<6; i++){
157 if( asv2_decode_block(a, block[i]) < 0)
158 return -1;
159 }
160 }
161 return 0;
162 }
163
164 static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){
165 DCTELEM (*block)[64]= a->block;
166 int linesize= a->picture.linesize[0];
167
168 uint8_t *dest_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
169 uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
170 uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
171
172 a->dsp.idct_put(dest_y , linesize, block[0]);
173 a->dsp.idct_put(dest_y + 8, linesize, block[1]);
174 a->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]);
175 a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
176
177 if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
178 a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
179 a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
180 }
181 }
182
183 static int decode_frame(AVCodecContext *avctx,
184 void *data, int *got_frame,
185 AVPacket *avpkt)
186 {
187 const uint8_t *buf = avpkt->data;
188 int buf_size = avpkt->size;
189 ASV1Context * const a = avctx->priv_data;
190 AVFrame *picture = data;
191 AVFrame * const p= &a->picture;
192 int mb_x, mb_y;
193
194 if(p->data[0])
195 avctx->release_buffer(avctx, p);
196
197 p->reference= 0;
198 if(ff_get_buffer(avctx, p) < 0){
199 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
200 return -1;
201 }
202 p->pict_type= AV_PICTURE_TYPE_I;
203 p->key_frame= 1;
204
205 av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size,
206 buf_size);
207 if (!a->bitstream_buffer)
208 return AVERROR(ENOMEM);
209
210 if(avctx->codec_id == AV_CODEC_ID_ASV1)
211 a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (const uint32_t*)buf, buf_size/4);
212 else{
213 int i;
214 for(i=0; i<buf_size; i++)
215 a->bitstream_buffer[i]= ff_reverse[ buf[i] ];
216 }
217
218 init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
219
220 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
221 for(mb_x=0; mb_x<a->mb_width2; mb_x++){
222 if( decode_mb(a, a->block) <0)
223 return -1;
224
225 idct_put(a, mb_x, mb_y);
226 }
227 }
228
229 if(a->mb_width2 != a->mb_width){
230 mb_x= a->mb_width2;
231 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
232 if( decode_mb(a, a->block) <0)
233 return -1;
234
235 idct_put(a, mb_x, mb_y);
236 }
237 }
238
239 if(a->mb_height2 != a->mb_height){
240 mb_y= a->mb_height2;
241 for(mb_x=0; mb_x<a->mb_width; mb_x++){
242 if( decode_mb(a, a->block) <0)
243 return -1;
244
245 idct_put(a, mb_x, mb_y);
246 }
247 }
248
249 *picture = a->picture;
250 *got_frame = 1;
251
252 emms_c();
253
254 return (get_bits_count(&a->gb)+31)/32*4;
255 }
256
257 static av_cold int decode_init(AVCodecContext *avctx){
258 ASV1Context * const a = avctx->priv_data;
259 AVFrame *p= &a->picture;
260 int i;
261 const int scale= avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
262
263 ff_asv_common_init(avctx);
264 init_vlcs(a);
265 ff_init_scantable(a->dsp.idct_permutation, &a->scantable, ff_asv_scantab);
266 avctx->pix_fmt= AV_PIX_FMT_YUV420P;
267
268 a->inv_qscale= avctx->extradata[0];
269 if(a->inv_qscale == 0){
270 av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
271 if(avctx->codec_id == AV_CODEC_ID_ASV1)
272 a->inv_qscale= 6;
273 else
274 a->inv_qscale= 10;
275 }
276
277 for(i=0; i<64; i++){
278 int index = ff_asv_scantab[i];
279
280 a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
281 }
282
283 p->qstride= a->mb_width;
284 p->qscale_table= av_malloc( p->qstride * a->mb_height);
285 p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;
286 memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
287
288 return 0;
289 }
290
291 static av_cold int decode_end(AVCodecContext *avctx){
292 ASV1Context * const a = avctx->priv_data;
293
294 av_freep(&a->bitstream_buffer);
295 av_freep(&a->picture.qscale_table);
296 a->bitstream_buffer_size=0;
297
298 if(a->picture.data[0])
299 avctx->release_buffer(avctx, &a->picture);
300
301 return 0;
302 }
303
304 AVCodec ff_asv1_decoder = {
305 .name = "asv1",
306 .type = AVMEDIA_TYPE_VIDEO,
307 .id = AV_CODEC_ID_ASV1,
308 .priv_data_size = sizeof(ASV1Context),
309 .init = decode_init,
310 .close = decode_end,
311 .decode = decode_frame,
312 .capabilities = CODEC_CAP_DR1,
313 .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
314 };
315
316 AVCodec ff_asv2_decoder = {
317 .name = "asv2",
318 .type = AVMEDIA_TYPE_VIDEO,
319 .id = AV_CODEC_ID_ASV2,
320 .priv_data_size = sizeof(ASV1Context),
321 .init = decode_init,
322 .close = decode_end,
323 .decode = decode_frame,
324 .capabilities = CODEC_CAP_DR1,
325 .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
326 };
327