lavc: export DV profile API used by muxer/demuxer as public
[libav.git] / libavcodec / dv.c
1 /*
2 * DV decoder
3 * Copyright (c) 2002 Fabrice Bellard
4 * Copyright (c) 2004 Roman Shaposhnik
5 *
6 * DV encoder
7 * Copyright (c) 2003 Roman Shaposhnik
8 *
9 * 50 Mbps (DVCPRO50) support
10 * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
11 *
12 * 100 Mbps (DVCPRO HD) support
13 * Initial code by Daniel Maas <dmaas@maasdigital.com> (funded by BBC R&D)
14 * Final code by Roman Shaposhnik
15 *
16 * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
17 * of DV technical info.
18 *
19 * This file is part of Libav.
20 *
21 * Libav is free software; you can redistribute it and/or
22 * modify it under the terms of the GNU Lesser General Public
23 * License as published by the Free Software Foundation; either
24 * version 2.1 of the License, or (at your option) any later version.
25 *
26 * Libav is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
29 * Lesser General Public License for more details.
30 *
31 * You should have received a copy of the GNU Lesser General Public
32 * License along with Libav; if not, write to the Free Software
33 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
34 */
35
36 /**
37 * @file
38 * DV codec.
39 */
40
41 #include "libavutil/internal.h"
42 #include "libavutil/pixdesc.h"
43 #include "avcodec.h"
44 #include "get_bits.h"
45 #include "internal.h"
46 #include "put_bits.h"
47 #include "simple_idct.h"
48 #include "dvdata.h"
49 #include "dv.h"
50
51 /* XXX: also include quantization */
52 RL_VLC_ELEM ff_dv_rl_vlc[1184];
53
54 static inline void dv_calc_mb_coordinates(const AVDVProfile *d, int chan, int seq, int slot,
55 uint16_t *tbl)
56 {
57 static const uint8_t off[] = { 2, 6, 8, 0, 4 };
58 static const uint8_t shuf1[] = { 36, 18, 54, 0, 72 };
59 static const uint8_t shuf2[] = { 24, 12, 36, 0, 48 };
60 static const uint8_t shuf3[] = { 18, 9, 27, 0, 36 };
61
62 static const uint8_t l_start[] = {0, 4, 9, 13, 18, 22, 27, 31, 36, 40};
63 static const uint8_t l_start_shuffled[] = { 9, 4, 13, 0, 18 };
64
65 static const uint8_t serpent1[] = {0, 1, 2, 2, 1, 0,
66 0, 1, 2, 2, 1, 0,
67 0, 1, 2, 2, 1, 0,
68 0, 1, 2, 2, 1, 0,
69 0, 1, 2};
70 static const uint8_t serpent2[] = {0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
71 0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
72 0, 1, 2, 3, 4, 5};
73
74 static const uint8_t remap[][2] = {{ 0, 0}, { 0, 0}, { 0, 0}, { 0, 0}, /* dummy */
75 { 0, 0}, { 0, 1}, { 0, 2}, { 0, 3}, {10, 0},
76 {10, 1}, {10, 2}, {10, 3}, {20, 0}, {20, 1},
77 {20, 2}, {20, 3}, {30, 0}, {30, 1}, {30, 2},
78 {30, 3}, {40, 0}, {40, 1}, {40, 2}, {40, 3},
79 {50, 0}, {50, 1}, {50, 2}, {50, 3}, {60, 0},
80 {60, 1}, {60, 2}, {60, 3}, {70, 0}, {70, 1},
81 {70, 2}, {70, 3}, { 0,64}, { 0,65}, { 0,66},
82 {10,64}, {10,65}, {10,66}, {20,64}, {20,65},
83 {20,66}, {30,64}, {30,65}, {30,66}, {40,64},
84 {40,65}, {40,66}, {50,64}, {50,65}, {50,66},
85 {60,64}, {60,65}, {60,66}, {70,64}, {70,65},
86 {70,66}, { 0,67}, {20,67}, {40,67}, {60,67}};
87
88 int i, k, m;
89 int x, y, blk;
90
91 for (m=0; m<5; m++) {
92 switch (d->width) {
93 case 1440:
94 blk = (chan*11+seq)*27+slot;
95
96 if (chan == 0 && seq == 11) {
97 x = m*27+slot;
98 if (x<90) {
99 y = 0;
100 } else {
101 x = (x - 90)*2;
102 y = 67;
103 }
104 } else {
105 i = (4*chan + blk + off[m])%11;
106 k = (blk/11)%27;
107
108 x = shuf1[m] + (chan&1)*9 + k%9;
109 y = (i*3+k/9)*2 + (chan>>1) + 1;
110 }
111 tbl[m] = (x<<1)|(y<<9);
112 break;
113 case 1280:
114 blk = (chan*10+seq)*27+slot;
115
116 i = (4*chan + (seq/5) + 2*blk + off[m])%10;
117 k = (blk/5)%27;
118
119 x = shuf1[m]+(chan&1)*9 + k%9;
120 y = (i*3+k/9)*2 + (chan>>1) + 4;
121
122 if (x >= 80) {
123 x = remap[y][0]+((x-80)<<(y>59));
124 y = remap[y][1];
125 }
126 tbl[m] = (x<<1)|(y<<9);
127 break;
128 case 960:
129 blk = (chan*10+seq)*27+slot;
130
131 i = (4*chan + (seq/5) + 2*blk + off[m])%10;
132 k = (blk/5)%27 + (i&1)*3;
133
134 x = shuf2[m] + k%6 + 6*(chan&1);
135 y = l_start[i] + k/6 + 45*(chan>>1);
136 tbl[m] = (x<<1)|(y<<9);
137 break;
138 case 720:
139 switch (d->pix_fmt) {
140 case AV_PIX_FMT_YUV422P:
141 x = shuf3[m] + slot/3;
142 y = serpent1[slot] +
143 ((((seq + off[m]) % d->difseg_size)<<1) + chan)*3;
144 tbl[m] = (x<<1)|(y<<8);
145 break;
146 case AV_PIX_FMT_YUV420P:
147 x = shuf3[m] + slot/3;
148 y = serpent1[slot] +
149 ((seq + off[m]) % d->difseg_size)*3;
150 tbl[m] = (x<<1)|(y<<9);
151 break;
152 case AV_PIX_FMT_YUV411P:
153 i = (seq + off[m]) % d->difseg_size;
154 k = slot + ((m==1||m==2)?3:0);
155
156 x = l_start_shuffled[m] + k/6;
157 y = serpent2[k] + i*6;
158 if (x>21)
159 y = y*2 - i*6;
160 tbl[m] = (x<<2)|(y<<8);
161 break;
162 }
163 default:
164 break;
165 }
166 }
167 }
168
169 /* quantization quanta by QNO for DV100 */
170 static const uint8_t dv100_qstep[16] = {
171 1, /* QNO = 0 and 1 both have no quantization */
172 1,
173 2, 3, 4, 5, 6, 7, 8, 16, 18, 20, 22, 24, 28, 52
174 };
175
176 static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 };
177
178 int ff_dv_init_dynamic_tables(DVVideoContext *ctx, const AVDVProfile *d)
179 {
180 int j,i,c,s,p;
181 uint32_t *factor1, *factor2;
182 const int *iweight1, *iweight2;
183
184 p = i = 0;
185 for (c = 0; c < d->n_difchan; c++) {
186 for (s = 0; s < d->difseg_size; s++) {
187 p += 6;
188 for (j = 0; j < 27; j++) {
189 p += !(j % 3);
190 if (!(DV_PROFILE_IS_1080i50(d) && c != 0 && s == 11) &&
191 !(DV_PROFILE_IS_720p50(d) && s > 9)) {
192 dv_calc_mb_coordinates(d, c, s, j, &ctx->work_chunks[i].mb_coordinates[0]);
193 ctx->work_chunks[i++].buf_offset = p;
194 }
195 p += 5;
196 }
197 }
198 }
199
200 factor1 = &ctx->idct_factor[0];
201 factor2 = &ctx->idct_factor[DV_PROFILE_IS_HD(d) ? 4096 : 2816];
202 if (d->height == 720) {
203 iweight1 = &ff_dv_iweight_720_y[0];
204 iweight2 = &ff_dv_iweight_720_c[0];
205 } else {
206 iweight1 = &ff_dv_iweight_1080_y[0];
207 iweight2 = &ff_dv_iweight_1080_c[0];
208 }
209 if (DV_PROFILE_IS_HD(d)) {
210 for (c = 0; c < 4; c++) {
211 for (s = 0; s < 16; s++) {
212 for (i = 0; i < 64; i++) {
213 *factor1++ = (dv100_qstep[s] << (c + 9)) * iweight1[i];
214 *factor2++ = (dv100_qstep[s] << (c + 9)) * iweight2[i];
215 }
216 }
217 }
218 } else {
219 iweight1 = &ff_dv_iweight_88[0];
220 for (j = 0; j < 2; j++, iweight1 = &ff_dv_iweight_248[0]) {
221 for (s = 0; s < 22; s++) {
222 for (i = c = 0; c < 4; c++) {
223 for (; i < dv_quant_areas[c]; i++) {
224 *factor1 = iweight1[i] << (ff_dv_quant_shifts[s][c] + 1);
225 *factor2++ = (*factor1++) << 1;
226 }
227 }
228 }
229 }
230 }
231
232 return 0;
233 }
234
235 av_cold int ff_dvvideo_init(AVCodecContext *avctx)
236 {
237 DVVideoContext *s = avctx->priv_data;
238 static int done = 0;
239 int i, j;
240
241 if (!done) {
242 VLC dv_vlc;
243 uint16_t new_dv_vlc_bits[NB_DV_VLC*2];
244 uint8_t new_dv_vlc_len[NB_DV_VLC*2];
245 uint8_t new_dv_vlc_run[NB_DV_VLC*2];
246 int16_t new_dv_vlc_level[NB_DV_VLC*2];
247
248 done = 1;
249
250 /* it's faster to include sign bit in a generic VLC parsing scheme */
251 for (i = 0, j = 0; i < NB_DV_VLC; i++, j++) {
252 new_dv_vlc_bits[j] = ff_dv_vlc_bits[i];
253 new_dv_vlc_len[j] = ff_dv_vlc_len[i];
254 new_dv_vlc_run[j] = ff_dv_vlc_run[i];
255 new_dv_vlc_level[j] = ff_dv_vlc_level[i];
256
257 if (ff_dv_vlc_level[i]) {
258 new_dv_vlc_bits[j] <<= 1;
259 new_dv_vlc_len[j]++;
260
261 j++;
262 new_dv_vlc_bits[j] = (ff_dv_vlc_bits[i] << 1) | 1;
263 new_dv_vlc_len[j] = ff_dv_vlc_len[i] + 1;
264 new_dv_vlc_run[j] = ff_dv_vlc_run[i];
265 new_dv_vlc_level[j] = -ff_dv_vlc_level[i];
266 }
267 }
268
269 /* NOTE: as a trick, we use the fact the no codes are unused
270 to accelerate the parsing of partial codes */
271 init_vlc(&dv_vlc, TEX_VLC_BITS, j,
272 new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2, 0);
273 assert(dv_vlc.table_size == 1184);
274
275 for (i = 0; i < dv_vlc.table_size; i++){
276 int code = dv_vlc.table[i][0];
277 int len = dv_vlc.table[i][1];
278 int level, run;
279
280 if (len < 0){ //more bits needed
281 run = 0;
282 level = code;
283 } else {
284 run = new_dv_vlc_run [code] + 1;
285 level = new_dv_vlc_level[code];
286 }
287 ff_dv_rl_vlc[i].len = len;
288 ff_dv_rl_vlc[i].level = level;
289 ff_dv_rl_vlc[i].run = run;
290 }
291 ff_free_vlc(&dv_vlc);
292 }
293
294 s->avctx = avctx;
295 avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
296
297 return 0;
298 }