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path: root/libavcodec/asvenc.c (plain)
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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 "libavutil/attributes.h"
27#include "libavutil/mem.h"
28
29#include "aandcttab.h"
30#include "asv.h"
31#include "avcodec.h"
32#include "dct.h"
33#include "fdctdsp.h"
34#include "internal.h"
35#include "mathops.h"
36#include "mpeg12data.h"
37
38static inline void asv2_put_bits(PutBitContext *pb, int n, int v)
39{
40 put_bits(pb, n, ff_reverse[v << (8 - n)]);
41}
42
43static inline void asv1_put_level(PutBitContext *pb, int level)
44{
45 unsigned int index = level + 3;
46
47 if (index <= 6) {
48 put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]);
49 } else {
50 put_bits(pb, ff_asv_level_tab[3][1], ff_asv_level_tab[3][0]);
51 put_sbits(pb, 8, level);
52 }
53}
54
55static inline void asv2_put_level(ASV1Context *a, PutBitContext *pb, int level)
56{
57 unsigned int index = level + 31;
58
59 if (index <= 62) {
60 put_bits(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]);
61 } else {
62 put_bits(pb, ff_asv2_level_tab[31][1], ff_asv2_level_tab[31][0]);
63 if (level < -128 || level > 127) {
64 av_log(a->avctx, AV_LOG_WARNING, "Clipping level %d, increase qscale\n", level);
65 level = av_clip_int8(level);
66 }
67 asv2_put_bits(pb, 8, level & 0xFF);
68 }
69}
70
71static inline void asv1_encode_block(ASV1Context *a, int16_t block[64])
72{
73 int i;
74 int nc_count = 0;
75
76 put_bits(&a->pb, 8, (block[0] + 32) >> 6);
77 block[0] = 0;
78
79 for (i = 0; i < 10; i++) {
80 const int index = ff_asv_scantab[4 * i];
81 int ccp = 0;
82
83 if ((block[index + 0] = (block[index + 0] *
84 a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
85 ccp |= 8;
86 if ((block[index + 8] = (block[index + 8] *
87 a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
88 ccp |= 4;
89 if ((block[index + 1] = (block[index + 1] *
90 a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
91 ccp |= 2;
92 if ((block[index + 9] = (block[index + 9] *
93 a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
94 ccp |= 1;
95
96 if (ccp) {
97 for (; nc_count; nc_count--)
98 put_bits(&a->pb, ff_asv_ccp_tab[0][1], ff_asv_ccp_tab[0][0]);
99
100 put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][0]);
101
102 if (ccp & 8)
103 asv1_put_level(&a->pb, block[index + 0]);
104 if (ccp & 4)
105 asv1_put_level(&a->pb, block[index + 8]);
106 if (ccp & 2)
107 asv1_put_level(&a->pb, block[index + 1]);
108 if (ccp & 1)
109 asv1_put_level(&a->pb, block[index + 9]);
110 } else {
111 nc_count++;
112 }
113 }
114 put_bits(&a->pb, ff_asv_ccp_tab[16][1], ff_asv_ccp_tab[16][0]);
115}
116
117static inline void asv2_encode_block(ASV1Context *a, int16_t block[64])
118{
119 int i;
120 int count = 0;
121
122 for (count = 63; count > 3; count--) {
123 const int index = ff_asv_scantab[count];
124 if ((block[index] * a->q_intra_matrix[index] + (1 << 15)) >> 16)
125 break;
126 }
127
128 count >>= 2;
129
130 asv2_put_bits(&a->pb, 4, count);
131 asv2_put_bits(&a->pb, 8, (block[0] + 32) >> 6);
132 block[0] = 0;
133
134 for (i = 0; i <= count; i++) {
135 const int index = ff_asv_scantab[4 * i];
136 int ccp = 0;
137
138 if ((block[index + 0] = (block[index + 0] *
139 a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
140 ccp |= 8;
141 if ((block[index + 8] = (block[index + 8] *
142 a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
143 ccp |= 4;
144 if ((block[index + 1] = (block[index + 1] *
145 a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
146 ccp |= 2;
147 if ((block[index + 9] = (block[index + 9] *
148 a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
149 ccp |= 1;
150
151 av_assert2(i || ccp < 8);
152 if (i)
153 put_bits(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]);
154 else
155 put_bits(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]);
156
157 if (ccp) {
158 if (ccp & 8)
159 asv2_put_level(a, &a->pb, block[index + 0]);
160 if (ccp & 4)
161 asv2_put_level(a, &a->pb, block[index + 8]);
162 if (ccp & 2)
163 asv2_put_level(a, &a->pb, block[index + 1]);
164 if (ccp & 1)
165 asv2_put_level(a, &a->pb, block[index + 9]);
166 }
167 }
168}
169
170#define MAX_MB_SIZE (30 * 16 * 16 * 3 / 2 / 8)
171
172static inline int encode_mb(ASV1Context *a, int16_t block[6][64])
173{
174 int i;
175
176 if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb) >> 3) < MAX_MB_SIZE) {
177 av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
178 return -1;
179 }
180
181 if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
182 for (i = 0; i < 6; i++)
183 asv1_encode_block(a, block[i]);
184 } else {
185 for (i = 0; i < 6; i++) {
186 asv2_encode_block(a, block[i]);
187 }
188 }
189 return 0;
190}
191
192static inline void dct_get(ASV1Context *a, const AVFrame *frame,
193 int mb_x, int mb_y)
194{
195 int16_t (*block)[64] = a->block;
196 int linesize = frame->linesize[0];
197 int i;
198
199 uint8_t *ptr_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16;
200 uint8_t *ptr_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
201 uint8_t *ptr_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
202
203 a->pdsp.get_pixels(block[0], ptr_y, linesize);
204 a->pdsp.get_pixels(block[1], ptr_y + 8, linesize);
205 a->pdsp.get_pixels(block[2], ptr_y + 8 * linesize, linesize);
206 a->pdsp.get_pixels(block[3], ptr_y + 8 * linesize + 8, linesize);
207 for (i = 0; i < 4; i++)
208 a->fdsp.fdct(block[i]);
209
210 if (!(a->avctx->flags & AV_CODEC_FLAG_GRAY)) {
211 a->pdsp.get_pixels(block[4], ptr_cb, frame->linesize[1]);
212 a->pdsp.get_pixels(block[5], ptr_cr, frame->linesize[2]);
213 for (i = 4; i < 6; i++)
214 a->fdsp.fdct(block[i]);
215 }
216}
217
218static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
219 const AVFrame *pict, int *got_packet)
220{
221 ASV1Context *const a = avctx->priv_data;
222 int size, ret;
223 int mb_x, mb_y;
224
225 if (pict->width % 16 || pict->height % 16) {
226 AVFrame *clone = av_frame_alloc();
227 int i;
228
229 if (!clone)
230 return AVERROR(ENOMEM);
231 clone->format = pict->format;
232 clone->width = FFALIGN(pict->width, 16);
233 clone->height = FFALIGN(pict->height, 16);
234 ret = av_frame_get_buffer(clone, 32);
235 if (ret < 0) {
236 av_frame_free(&clone);
237 return ret;
238 }
239
240 ret = av_frame_copy(clone, pict);
241 if (ret < 0) {
242 av_frame_free(&clone);
243 return ret;
244 }
245
246 for (i = 0; i<3; i++) {
247 int x, y;
248 int w = AV_CEIL_RSHIFT(pict->width, !!i);
249 int h = AV_CEIL_RSHIFT(pict->height, !!i);
250 int w2 = AV_CEIL_RSHIFT(clone->width, !!i);
251 int h2 = AV_CEIL_RSHIFT(clone->height, !!i);
252 for (y=0; y<h; y++)
253 for (x=w; x<w2; x++)
254 clone->data[i][x + y*clone->linesize[i]] =
255 clone->data[i][w - 1 + y*clone->linesize[i]];
256 for (y=h; y<h2; y++)
257 for (x=0; x<w2; x++)
258 clone->data[i][x + y*clone->linesize[i]] =
259 clone->data[i][x + (h-1)*clone->linesize[i]];
260 }
261 ret = encode_frame(avctx, pkt, clone, got_packet);
262
263 av_frame_free(&clone);
264 return ret;
265 }
266
267 if ((ret = ff_alloc_packet2(avctx, pkt, a->mb_height * a->mb_width * MAX_MB_SIZE +
268 AV_INPUT_BUFFER_MIN_SIZE, 0)) < 0)
269 return ret;
270
271 init_put_bits(&a->pb, pkt->data, pkt->size);
272
273 for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
274 for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
275 dct_get(a, pict, mb_x, mb_y);
276 encode_mb(a, a->block);
277 }
278 }
279
280 if (a->mb_width2 != a->mb_width) {
281 mb_x = a->mb_width2;
282 for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
283 dct_get(a, pict, mb_x, mb_y);
284 encode_mb(a, a->block);
285 }
286 }
287
288 if (a->mb_height2 != a->mb_height) {
289 mb_y = a->mb_height2;
290 for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
291 dct_get(a, pict, mb_x, mb_y);
292 encode_mb(a, a->block);
293 }
294 }
295 emms_c();
296
297 avpriv_align_put_bits(&a->pb);
298 while (put_bits_count(&a->pb) & 31)
299 put_bits(&a->pb, 8, 0);
300
301 size = put_bits_count(&a->pb) / 32;
302
303 if (avctx->codec_id == AV_CODEC_ID_ASV1) {
304 a->bbdsp.bswap_buf((uint32_t *) pkt->data,
305 (uint32_t *) pkt->data, size);
306 } else {
307 int i;
308 for (i = 0; i < 4 * size; i++)
309 pkt->data[i] = ff_reverse[pkt->data[i]];
310 }
311
312 pkt->size = size * 4;
313 pkt->flags |= AV_PKT_FLAG_KEY;
314 *got_packet = 1;
315
316 return 0;
317}
318
319static av_cold int encode_init(AVCodecContext *avctx)
320{
321 ASV1Context *const a = avctx->priv_data;
322 int i;
323 const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
324
325 ff_asv_common_init(avctx);
326 ff_fdctdsp_init(&a->fdsp, avctx);
327 ff_pixblockdsp_init(&a->pdsp, avctx);
328
329 if (avctx->global_quality <= 0)
330 avctx->global_quality = 4 * FF_QUALITY_SCALE;
331
332 a->inv_qscale = (32 * scale * FF_QUALITY_SCALE +
333 avctx->global_quality / 2) / avctx->global_quality;
334
335 avctx->extradata = av_mallocz(8);
336 if (!avctx->extradata)
337 return AVERROR(ENOMEM);
338 avctx->extradata_size = 8;
339 ((uint32_t *) avctx->extradata)[0] = av_le2ne32(a->inv_qscale);
340 ((uint32_t *) avctx->extradata)[1] = av_le2ne32(AV_RL32("ASUS"));
341
342 for (i = 0; i < 64; i++) {
343 if (a->fdsp.fdct == ff_fdct_ifast) {
344 int q = 32LL * scale * ff_mpeg1_default_intra_matrix[i] * ff_aanscales[i];
345 a->q_intra_matrix[i] = (((int64_t)a->inv_qscale << 30) + q / 2) / q;
346 } else {
347 int q = 32 * scale * ff_mpeg1_default_intra_matrix[i];
348 a->q_intra_matrix[i] = ((a->inv_qscale << 16) + q / 2) / q;
349 }
350 }
351
352 return 0;
353}
354
355#if CONFIG_ASV1_ENCODER
356AVCodec ff_asv1_encoder = {
357 .name = "asv1",
358 .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
359 .type = AVMEDIA_TYPE_VIDEO,
360 .id = AV_CODEC_ID_ASV1,
361 .priv_data_size = sizeof(ASV1Context),
362 .init = encode_init,
363 .encode2 = encode_frame,
364 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
365 AV_PIX_FMT_NONE },
366 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
367};
368#endif
369
370#if CONFIG_ASV2_ENCODER
371AVCodec ff_asv2_encoder = {
372 .name = "asv2",
373 .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
374 .type = AVMEDIA_TYPE_VIDEO,
375 .id = AV_CODEC_ID_ASV2,
376 .priv_data_size = sizeof(ASV1Context),
377 .init = encode_init,
378 .encode2 = encode_frame,
379 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
380 AV_PIX_FMT_NONE },
381 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
382};
383#endif
384
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