FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/asvenc.c
Date: 2025-07-28 20:30:09
Exec Total Coverage
Lines: 212 219 96.8%
Functions: 9 9 100.0%
Branches: 103 112 92.0%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2003 Michael Niedermayer
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21 /**
22 * @file
23 * ASUS V1/V2 encoder.
24 */
25
26 #include "config_components.h"
27
28 #include "libavutil/attributes.h"
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/mem.h"
31 #include "libavutil/mem_internal.h"
32
33 #include "aandcttab.h"
34 #include "asv.h"
35 #include "avcodec.h"
36 #include "codec_internal.h"
37 #include "encode.h"
38 #include "fdctdsp.h"
39 #include "mpeg12data.h"
40 #include "pixblockdsp.h"
41 #include "put_bits.h"
42
43 typedef struct ASVEncContext {
44 ASVCommonContext c;
45
46 PutBitContext pb;
47
48 void (*get_pixels)(int16_t *restrict block,
49 const uint8_t *pixels,
50 ptrdiff_t stride);
51
52 PixblockDSPContext pdsp;
53 FDCTDSPContext fdsp;
54 DECLARE_ALIGNED(32, int16_t, block)[6][64];
55 int q_intra_matrix[64];
56 } ASVEncContext;
57
58 enum {
59 ASV1_MAX_BLOCK_SIZE = 8 + 10 * FFMAX(2 /* skip */, 5 /* ccp */ + 4 * 11 /* level */) + 5,
60 ASV1_MAX_MB_SIZE = 6 * ASV1_MAX_BLOCK_SIZE,
61 ASV2_MAX_BLOCK_SIZE = 4 + 8 + 16 * (6 /* ccp */ + 4 * 13 /* level */),
62 ASV2_MAX_MB_SIZE = 6 * ASV2_MAX_BLOCK_SIZE,
63 MAX_MB_SIZE = (FFMAX(ASV1_MAX_MB_SIZE, ASV2_MAX_MB_SIZE) + 7) / 8
64 };
65
66 2970458 static inline void asv1_put_level(PutBitContext *pb, int level)
67 {
68 2970458 unsigned int index = level + 3;
69 unsigned n, code;
70
71
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 2970458 if (index <= 6) {
72 2541647 n = ff_asv_level_tab[index][1];
73 2541647 code = ff_asv_level_tab[index][0];
74 } else {
75 428811 n = 3 + 8;
76 428811 code = (0 /* Escape code */ << 8) | (level & 0xFF);
77 }
78 2970458 put_bits(pb, n, code);
79 2970458 }
80
81 3657862 static inline void asv2_put_level(ASVEncContext *a, PutBitContext *pb, int level)
82 {
83 3657862 unsigned int index = level + 31;
84 unsigned n, code;
85
86
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 3657862 if (index <= 62) {
87 3657249 n = ff_asv2_level_tab[index][1];
88 3657249 code = ff_asv2_level_tab[index][0];
89 } else {
90
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 613 if (level < -128 || level > 127) {
91 ✗ av_log(a->c.avctx, AV_LOG_WARNING, "Clipping level %d, increase qscale\n", level);
92 ✗ level = av_clip_int8(level);
93 }
94 613 n = 5 + 8;
95 613 code = (level & 0xFF) << 5 | /* Escape code */ 0;
96 }
97 3657862 put_bits_le(pb, n, code);
98 3657862 }
99
100 359100 static inline void asv1_encode_block(ASVEncContext *a, int16_t block[64])
101 {
102 359100 put_bits(&a->pb, 8, (block[0] + 32) >> 6);
103 359100 block[0] = 0;
104
105
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 3950100 for (unsigned i = 0, nc_bits = 0, nc_val = 0; i < 10; i++) {
106 3591000 const int index = ff_asv_scantab[4 * i];
107 3591000 int ccp = 0;
108
109 3591000 if ((block[index + 0] = (block[index + 0] *
110
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 3591000 a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
111 758490 ccp |= 8;
112 3591000 if ((block[index + 8] = (block[index + 8] *
113
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 3591000 a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
114 827835 ccp |= 4;
115 3591000 if ((block[index + 1] = (block[index + 1] *
116
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 3591000 a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
117 780446 ccp |= 2;
118 3591000 if ((block[index + 9] = (block[index + 9] *
119
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 3591000 a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
120 603687 ccp |= 1;
121
122
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 3591000 if (ccp) {
123 1362801 put_bits(&a->pb, nc_bits + ff_asv_ccp_tab[ccp][1],
124 1362801 nc_val << ff_asv_ccp_tab[ccp][1] /* Skip */ |
125 1362801 ff_asv_ccp_tab[ccp][0]);
126 1362801 nc_bits = 0;
127 1362801 nc_val = 0;
128
129
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 1362801 if (ccp & 8)
130 758490 asv1_put_level(&a->pb, block[index + 0]);
131
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 1362801 if (ccp & 4)
132 827835 asv1_put_level(&a->pb, block[index + 8]);
133
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 1362801 if (ccp & 2)
134 780446 asv1_put_level(&a->pb, block[index + 1]);
135
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 1362801 if (ccp & 1)
136 603687 asv1_put_level(&a->pb, block[index + 9]);
137 } else {
138 2228199 nc_bits += 2;
139 2228199 nc_val = (nc_val << 2) | 2;
140 }
141 }
142 359100 put_bits(&a->pb, 5, 0xF); /* End of block */
143 359100 }
144
145 359100 static inline void asv2_encode_block(ASVEncContext *a, int16_t block[64])
146 {
147 int i;
148 359100 int count = 0;
149
150
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 14507068 for (count = 63; count > 3; count--) {
151 14443629 const int index = ff_asv_scantab[count];
152
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 14443629 if ((block[index] * a->q_intra_matrix[index] + (1 << 15)) >> 16)
153 295661 break;
154 }
155
156 359100 count >>= 2;
157
158 359100 put_bits_le(&a->pb, 4 + 8, count /* 4 bits */ |
159 359100 (/* DC */(block[0] + 32) >> 6) << 4);
160 359100 block[0] = 0;
161
162
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 2706274 for (i = 0; i <= count; i++) {
163 2347174 const int index = ff_asv_scantab[4 * i];
164 2347174 int ccp = 0;
165
166 2347174 if ((block[index + 0] = (block[index + 0] *
167
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 2347174 a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
168 967939 ccp |= 8;
169 2347174 if ((block[index + 8] = (block[index + 8] *
170
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 2347174 a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
171 1013819 ccp |= 4;
172 2347174 if ((block[index + 1] = (block[index + 1] *
173
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 2347174 a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
174 950720 ccp |= 2;
175 2347174 if ((block[index + 9] = (block[index + 9] *
176
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 2347174 a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
177 725384 ccp |= 1;
178
179 av_assert2(i || ccp < 8);
180
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 2347174 if (i)
181 1988074 put_bits_le(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]);
182 else
183 359100 put_bits_le(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]);
184
185
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 2347174 if (ccp) {
186
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 1696154 if (ccp & 8)
187 967939 asv2_put_level(a, &a->pb, block[index + 0]);
188
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 1696154 if (ccp & 4)
189 1013819 asv2_put_level(a, &a->pb, block[index + 8]);
190
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 1696154 if (ccp & 2)
191 950720 asv2_put_level(a, &a->pb, block[index + 1]);
192
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 1696154 if (ccp & 1)
193 725384 asv2_put_level(a, &a->pb, block[index + 9]);
194 }
195 }
196 359100 }
197
198 119700 static inline int encode_mb(ASVEncContext *a, int16_t block[6][64])
199 {
200 int i;
201
202
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 119700 av_assert0(put_bytes_left(&a->pb, 0) >= MAX_MB_SIZE);
203
204
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 119700 if (a->c.avctx->codec_id == AV_CODEC_ID_ASV1) {
205
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 418950 for (i = 0; i < 6; i++)
206 359100 asv1_encode_block(a, block[i]);
207 } else {
208
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 418950 for (i = 0; i < 6; i++) {
209 359100 asv2_encode_block(a, block[i]);
210 }
211 }
212 119700 return 0;
213 }
214
215 119200 static inline void dct_get(ASVEncContext *a, const AVFrame *frame,
216 int mb_x, int mb_y)
217 {
218 119200 int16_t (*block)[64] = a->block;
219 119200 int linesize = frame->linesize[0];
220 int i;
221
222 119200 const uint8_t *ptr_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16;
223 119200 const uint8_t *ptr_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
224 119200 const uint8_t *ptr_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
225
226 119200 a->get_pixels(block[0], ptr_y, linesize);
227 119200 a->get_pixels(block[1], ptr_y + 8, linesize);
228 119200 a->get_pixels(block[2], ptr_y + 8 * linesize, linesize);
229 119200 a->get_pixels(block[3], ptr_y + 8 * linesize + 8, linesize);
230
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 596000 for (i = 0; i < 4; i++)
231 476800 a->fdsp.fdct(block[i]);
232
233
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 119200 if (!(a->c.avctx->flags & AV_CODEC_FLAG_GRAY)) {
234 119200 a->get_pixels(block[4], ptr_cb, frame->linesize[1]);
235 119200 a->get_pixels(block[5], ptr_cr, frame->linesize[2]);
236
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 357600 for (i = 4; i < 6; i++)
237 238400 a->fdsp.fdct(block[i]);
238 }
239 119200 }
240
241 500 static void handle_partial_mb(ASVEncContext *a, const uint8_t *const data[3],
242 const int linesizes[3],
243 int valid_width, int valid_height)
244 {
245
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 500 const int nb_blocks = a->c.avctx->flags & AV_CODEC_FLAG_GRAY ? 4 : 6;
246 static const struct Descriptor {
247 uint8_t x_offset, y_offset;
248 uint8_t component, subsampling;
249 } block_descriptor[] = {
250 { 0, 0, 0, 0 }, { 8, 0, 0, 0 }, { 0, 8, 0, 0 }, { 8, 8, 0, 0 },
251 { 0, 0, 1, 1 }, { 0, 0, 2, 1 },
252 };
253
254
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 3500 for (int i = 0; i < nb_blocks; ++i) {
255 3000 const struct Descriptor *const desc = block_descriptor + i;
256 3000 int width_avail = AV_CEIL_RSHIFT(valid_width, desc->subsampling) - desc->x_offset;
257 3000 int height_avail = AV_CEIL_RSHIFT(valid_height, desc->subsampling) - desc->y_offset;
258
259
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 3000 if (width_avail <= 0 || height_avail <= 0) {
260 // This block is outside of the visible part; don't replicate pixels,
261 // just zero the block, so that only the dc value will be coded.
262 1100 memset(a->block[i], 0, sizeof(a->block[i]));
263 1100 continue;
264 }
265 1900 width_avail = FFMIN(width_avail, 8);
266 1900 height_avail = FFMIN(height_avail, 8);
267
268 1900 ptrdiff_t linesize = linesizes[desc->component];
269 1900 const uint8_t *src = data[desc->component] + desc->y_offset * linesize + desc->x_offset;
270 1900 int16_t *block = a->block[i];
271
272 8000 for (int h = 0;; block += 8, src += linesize) {
273 int16_t last;
274
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 27800 for (int w = 0; w < width_avail; ++w)
275 19800 last = block[w] = src[w];
276
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 52200 for (int w = width_avail; w < 8; ++w)
277 44200 block[w] = last;
278
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 8000 if (++h == height_avail)
279 1900 break;
280 }
281 1900 const int16_t *const last_row = block;
282
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 9100 for (int h = height_avail; h < 8; ++h) {
283 7200 block += 8;
284 7200 AV_COPY128(block, last_row);
285 }
286
287 1900 a->fdsp.fdct(a->block[i]);
288 }
289
290 500 encode_mb(a, a->block);
291 500 }
292
293 400 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
294 const AVFrame *pict, int *got_packet)
295 {
296 400 ASVEncContext *const a = avctx->priv_data;
297 400 const ASVCommonContext *const c = &a->c;
298 int size, ret;
299
300 400 ret = ff_alloc_packet(avctx, pkt, c->mb_height * c->mb_width * MAX_MB_SIZE + 3);
301
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 400 if (ret < 0)
302 ✗ return ret;
303
304 if (!PIXBLOCKDSP_8BPP_GET_PIXELS_SUPPORTS_UNALIGNED &&
305 ((uintptr_t)pict->data[0] & 7 || pict->linesize[0] & 7 ||
306 (uintptr_t)pict->data[1] & 7 || pict->linesize[1] & 7 ||
307 (uintptr_t)pict->data[2] & 7 || pict->linesize[2] & 7))
308 a->get_pixels = a->pdsp.get_pixels_unaligned;
309 else
310 400 a->get_pixels = a->pdsp.get_pixels;
311
312 400 init_put_bits(&a->pb, pkt->data, pkt->size);
313
314
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 6000 for (int mb_y = 0; mb_y < c->mb_height2; mb_y++) {
315
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 124800 for (int mb_x = 0; mb_x < c->mb_width2; mb_x++) {
316 119200 dct_get(a, pict, mb_x, mb_y);
317 119200 encode_mb(a, a->block);
318 }
319 }
320
321
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 400 if (avctx->width & 15) {
322 100 const uint8_t *src[3] = {
323 100 pict->data[0] + c->mb_width2 * 16,
324 100 pict->data[1] + c->mb_width2 * 8,
325 100 pict->data[2] + c->mb_width2 * 8,
326 };
327 100 int available_width = avctx->width & 15;
328
329
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 300 for (int mb_y = 0; mb_y < c->mb_height2; mb_y++) {
330 200 handle_partial_mb(a, src, pict->linesize, available_width, 16);
331 200 src[0] += 16 * pict->linesize[0];
332 200 src[1] += 8 * pict->linesize[1];
333 200 src[2] += 8 * pict->linesize[2];
334 }
335 }
336
337
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 400 if (avctx->height & 15) {
338 100 const uint8_t *src[3] = {
339 100 pict->data[0] + c->mb_height2 * 16 * pict->linesize[0],
340 100 pict->data[1] + c->mb_height2 * 8 * pict->linesize[1],
341 100 pict->data[2] + c->mb_height2 * 8 * pict->linesize[2],
342 };
343 100 int available_height = avctx->height & 15;
344
345 100 for (int remaining = avctx->width;; remaining -= 16) {
346 300 handle_partial_mb(a, src, pict->linesize, remaining, available_height);
347
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 300 if (remaining <= 16)
348 100 break;
349 200 src[0] += 16;
350 200 src[1] += 8;
351 200 src[2] += 8;
352 }
353 }
354
355
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 400 if (avctx->codec_id == AV_CODEC_ID_ASV1)
356 200 flush_put_bits(&a->pb);
357 else
358 200 flush_put_bits_le(&a->pb);
359 400 AV_WN32(put_bits_ptr(&a->pb), 0);
360 400 size = (put_bytes_output(&a->pb) + 3) / 4;
361
362
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 400 if (avctx->codec_id == AV_CODEC_ID_ASV1) {
363 200 c->bbdsp.bswap_buf((uint32_t *) pkt->data,
364 200 (uint32_t *) pkt->data, size);
365 }
366
367 400 pkt->size = size * 4;
368 400 *got_packet = 1;
369
370 400 return 0;
371 }
372
373 8 static av_cold int encode_init(AVCodecContext *avctx)
374 {
375 8 ASVEncContext *const a = avctx->priv_data;
376 int i;
377
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 8 const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
378 int inv_qscale;
379
380 8 ff_asv_common_init(avctx);
381 8 ff_fdctdsp_init(&a->fdsp, avctx);
382 8 ff_pixblockdsp_init(&a->pdsp, 8);
383
384
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 8 if (avctx->global_quality <= 0)
385 ✗ avctx->global_quality = 4 * FF_QUALITY_SCALE;
386
387 8 inv_qscale = (32 * scale * FF_QUALITY_SCALE +
388 8 avctx->global_quality / 2) / avctx->global_quality;
389
390 8 avctx->extradata = av_mallocz(8);
391
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 8 if (!avctx->extradata)
392 ✗ return AVERROR(ENOMEM);
393 8 avctx->extradata_size = 8;
394 8 AV_WL32A(avctx->extradata, inv_qscale);
395 8 AV_WL32A(avctx->extradata + 4, MKTAG('A', 'S', 'U', 'S'));
396
397
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 520 for (i = 0; i < 64; i++) {
398
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 512 if (a->fdsp.fdct == ff_fdct_ifast) {
399 512 int q = 32LL * scale * ff_mpeg1_default_intra_matrix[i] * ff_aanscales[i];
400 512 a->q_intra_matrix[i] = (((int64_t)inv_qscale << 30) + q / 2) / q;
401 } else {
402 ✗ int q = 32 * scale * ff_mpeg1_default_intra_matrix[i];
403 ✗ a->q_intra_matrix[i] = ((inv_qscale << 16) + q / 2) / q;
404 }
405 }
406
407 8 return 0;
408 }
409
410 #if CONFIG_ASV1_ENCODER
411 const FFCodec ff_asv1_encoder = {
412 .p.name = "asv1",
413 CODEC_LONG_NAME("ASUS V1"),
414 .p.type = AVMEDIA_TYPE_VIDEO,
415 .p.id = AV_CODEC_ID_ASV1,
416 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
417 .priv_data_size = sizeof(ASVEncContext),
418 .init = encode_init,
419 FF_CODEC_ENCODE_CB(encode_frame),
420 CODEC_PIXFMTS(AV_PIX_FMT_YUV420P),
421 .color_ranges = AVCOL_RANGE_MPEG,
422 };
423 #endif
424
425 #if CONFIG_ASV2_ENCODER
426 const FFCodec ff_asv2_encoder = {
427 .p.name = "asv2",
428 CODEC_LONG_NAME("ASUS V2"),
429 .p.type = AVMEDIA_TYPE_VIDEO,
430 .p.id = AV_CODEC_ID_ASV2,
431 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
432 .priv_data_size = sizeof(ASVEncContext),
433 .init = encode_init,
434 FF_CODEC_ENCODE_CB(encode_frame),
435 CODEC_PIXFMTS(AV_PIX_FMT_YUV420P),
436 .color_ranges = AVCOL_RANGE_MPEG,
437 };
438 #endif
439