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 "mpeg12data.h"
36
asv1_put_level(PutBitContext * pb,int level)37 static inline void asv1_put_level(PutBitContext *pb, int level)
38 {
39 unsigned int index = level + 3;
40
41 if (index <= 6) {
42 put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]);
43 } else {
44 put_bits(pb, 3, 0); /* Escape code */
45 put_sbits(pb, 8, level);
46 }
47 }
48
asv2_put_level(ASV1Context * a,PutBitContext * pb,int level)49 static inline void asv2_put_level(ASV1Context *a, PutBitContext *pb, int level)
50 {
51 unsigned int index = level + 31;
52
53 if (index <= 62) {
54 put_bits_le(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]);
55 } else {
56 put_bits_le(pb, 5, 0); /* Escape code */
57 if (level < -128 || level > 127) {
58 av_log(a->avctx, AV_LOG_WARNING, "Clipping level %d, increase qscale\n", level);
59 level = av_clip_int8(level);
60 }
61 put_bits_le(pb, 8, level & 0xFF);
62 }
63 }
64
asv1_encode_block(ASV1Context * a,int16_t block[64])65 static inline void asv1_encode_block(ASV1Context *a, int16_t block[64])
66 {
67 int i;
68 int nc_count = 0;
69
70 put_bits(&a->pb, 8, (block[0] + 32) >> 6);
71 block[0] = 0;
72
73 for (i = 0; i < 10; i++) {
74 const int index = ff_asv_scantab[4 * i];
75 int ccp = 0;
76
77 if ((block[index + 0] = (block[index + 0] *
78 a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
79 ccp |= 8;
80 if ((block[index + 8] = (block[index + 8] *
81 a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
82 ccp |= 4;
83 if ((block[index + 1] = (block[index + 1] *
84 a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
85 ccp |= 2;
86 if ((block[index + 9] = (block[index + 9] *
87 a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
88 ccp |= 1;
89
90 if (ccp) {
91 for (; nc_count; nc_count--)
92 put_bits(&a->pb, 2, 2); /* Skip */
93
94 put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][0]);
95
96 if (ccp & 8)
97 asv1_put_level(&a->pb, block[index + 0]);
98 if (ccp & 4)
99 asv1_put_level(&a->pb, block[index + 8]);
100 if (ccp & 2)
101 asv1_put_level(&a->pb, block[index + 1]);
102 if (ccp & 1)
103 asv1_put_level(&a->pb, block[index + 9]);
104 } else {
105 nc_count++;
106 }
107 }
108 put_bits(&a->pb, 5, 0xF); /* End of block */
109 }
110
asv2_encode_block(ASV1Context * a,int16_t block[64])111 static inline void asv2_encode_block(ASV1Context *a, int16_t block[64])
112 {
113 int i;
114 int count = 0;
115
116 for (count = 63; count > 3; count--) {
117 const int index = ff_asv_scantab[count];
118 if ((block[index] * a->q_intra_matrix[index] + (1 << 15)) >> 16)
119 break;
120 }
121
122 count >>= 2;
123
124 put_bits_le(&a->pb, 4, count);
125 put_bits_le(&a->pb, 8, (block[0] + 32) >> 6);
126 block[0] = 0;
127
128 for (i = 0; i <= count; i++) {
129 const int index = ff_asv_scantab[4 * i];
130 int ccp = 0;
131
132 if ((block[index + 0] = (block[index + 0] *
133 a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
134 ccp |= 8;
135 if ((block[index + 8] = (block[index + 8] *
136 a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
137 ccp |= 4;
138 if ((block[index + 1] = (block[index + 1] *
139 a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
140 ccp |= 2;
141 if ((block[index + 9] = (block[index + 9] *
142 a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
143 ccp |= 1;
144
145 av_assert2(i || ccp < 8);
146 if (i)
147 put_bits_le(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]);
148 else
149 put_bits_le(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]);
150
151 if (ccp) {
152 if (ccp & 8)
153 asv2_put_level(a, &a->pb, block[index + 0]);
154 if (ccp & 4)
155 asv2_put_level(a, &a->pb, block[index + 8]);
156 if (ccp & 2)
157 asv2_put_level(a, &a->pb, block[index + 1]);
158 if (ccp & 1)
159 asv2_put_level(a, &a->pb, block[index + 9]);
160 }
161 }
162 }
163
164 #define MAX_MB_SIZE (30 * 16 * 16 * 3 / 2 / 8)
165
encode_mb(ASV1Context * a,int16_t block[6][64])166 static inline int encode_mb(ASV1Context *a, int16_t block[6][64])
167 {
168 int i;
169
170 av_assert0(a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb) >> 3) >= MAX_MB_SIZE);
171
172 if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
173 for (i = 0; i < 6; i++)
174 asv1_encode_block(a, block[i]);
175 } else {
176 for (i = 0; i < 6; i++) {
177 asv2_encode_block(a, block[i]);
178 }
179 }
180 return 0;
181 }
182
dct_get(ASV1Context * a,const AVFrame * frame,int mb_x,int mb_y)183 static inline void dct_get(ASV1Context *a, const AVFrame *frame,
184 int mb_x, int mb_y)
185 {
186 int16_t (*block)[64] = a->block;
187 int linesize = frame->linesize[0];
188 int i;
189
190 uint8_t *ptr_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16;
191 uint8_t *ptr_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
192 uint8_t *ptr_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
193
194 a->pdsp.get_pixels(block[0], ptr_y, linesize);
195 a->pdsp.get_pixels(block[1], ptr_y + 8, linesize);
196 a->pdsp.get_pixels(block[2], ptr_y + 8 * linesize, linesize);
197 a->pdsp.get_pixels(block[3], ptr_y + 8 * linesize + 8, linesize);
198 for (i = 0; i < 4; i++)
199 a->fdsp.fdct(block[i]);
200
201 if (!(a->avctx->flags & AV_CODEC_FLAG_GRAY)) {
202 a->pdsp.get_pixels(block[4], ptr_cb, frame->linesize[1]);
203 a->pdsp.get_pixels(block[5], ptr_cr, frame->linesize[2]);
204 for (i = 4; i < 6; i++)
205 a->fdsp.fdct(block[i]);
206 }
207 }
208
encode_frame(AVCodecContext * avctx,AVPacket * pkt,const AVFrame * pict,int * got_packet)209 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
210 const AVFrame *pict, int *got_packet)
211 {
212 ASV1Context *const a = avctx->priv_data;
213 int size, ret;
214 int mb_x, mb_y;
215
216 if (pict->width % 16 || pict->height % 16) {
217 AVFrame *clone = av_frame_alloc();
218 int i;
219
220 if (!clone)
221 return AVERROR(ENOMEM);
222 clone->format = pict->format;
223 clone->width = FFALIGN(pict->width, 16);
224 clone->height = FFALIGN(pict->height, 16);
225 ret = av_frame_get_buffer(clone, 0);
226 if (ret < 0) {
227 av_frame_free(&clone);
228 return ret;
229 }
230
231 ret = av_frame_copy(clone, pict);
232 if (ret < 0) {
233 av_frame_free(&clone);
234 return ret;
235 }
236
237 for (i = 0; i<3; i++) {
238 int x, y;
239 int w = AV_CEIL_RSHIFT(pict->width, !!i);
240 int h = AV_CEIL_RSHIFT(pict->height, !!i);
241 int w2 = AV_CEIL_RSHIFT(clone->width, !!i);
242 int h2 = AV_CEIL_RSHIFT(clone->height, !!i);
243 for (y=0; y<h; y++)
244 for (x=w; x<w2; x++)
245 clone->data[i][x + y*clone->linesize[i]] =
246 clone->data[i][w - 1 + y*clone->linesize[i]];
247 for (y=h; y<h2; y++)
248 for (x=0; x<w2; x++)
249 clone->data[i][x + y*clone->linesize[i]] =
250 clone->data[i][x + (h-1)*clone->linesize[i]];
251 }
252 ret = encode_frame(avctx, pkt, clone, got_packet);
253
254 av_frame_free(&clone);
255 return ret;
256 }
257
258 if ((ret = ff_alloc_packet2(avctx, pkt, a->mb_height * a->mb_width * MAX_MB_SIZE +
259 AV_INPUT_BUFFER_MIN_SIZE, 0)) < 0)
260 return ret;
261
262 init_put_bits(&a->pb, pkt->data, pkt->size);
263
264 for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
265 for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
266 dct_get(a, pict, mb_x, mb_y);
267 encode_mb(a, a->block);
268 }
269 }
270
271 if (a->mb_width2 != a->mb_width) {
272 mb_x = a->mb_width2;
273 for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
274 dct_get(a, pict, mb_x, mb_y);
275 encode_mb(a, a->block);
276 }
277 }
278
279 if (a->mb_height2 != a->mb_height) {
280 mb_y = a->mb_height2;
281 for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
282 dct_get(a, pict, mb_x, mb_y);
283 encode_mb(a, a->block);
284 }
285 }
286 emms_c();
287
288 if (avctx->codec_id == AV_CODEC_ID_ASV1)
289 flush_put_bits(&a->pb);
290 else
291 flush_put_bits_le(&a->pb);
292 AV_WN32(put_bits_ptr(&a->pb), 0);
293 size = (put_bits_count(&a->pb) + 31) / 32;
294
295 if (avctx->codec_id == AV_CODEC_ID_ASV1) {
296 a->bbdsp.bswap_buf((uint32_t *) pkt->data,
297 (uint32_t *) pkt->data, size);
298 }
299
300 pkt->size = size * 4;
301 pkt->flags |= AV_PKT_FLAG_KEY;
302 *got_packet = 1;
303
304 return 0;
305 }
306
encode_init(AVCodecContext * avctx)307 static av_cold int encode_init(AVCodecContext *avctx)
308 {
309 ASV1Context *const a = avctx->priv_data;
310 int i;
311 const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
312
313 ff_asv_common_init(avctx);
314 ff_fdctdsp_init(&a->fdsp, avctx);
315 ff_pixblockdsp_init(&a->pdsp, avctx);
316
317 if (avctx->global_quality <= 0)
318 avctx->global_quality = 4 * FF_QUALITY_SCALE;
319
320 a->inv_qscale = (32 * scale * FF_QUALITY_SCALE +
321 avctx->global_quality / 2) / avctx->global_quality;
322
323 avctx->extradata = av_mallocz(8);
324 if (!avctx->extradata)
325 return AVERROR(ENOMEM);
326 avctx->extradata_size = 8;
327 ((uint32_t *) avctx->extradata)[0] = av_le2ne32(a->inv_qscale);
328 ((uint32_t *) avctx->extradata)[1] = av_le2ne32(AV_RL32("ASUS"));
329
330 for (i = 0; i < 64; i++) {
331 if (a->fdsp.fdct == ff_fdct_ifast) {
332 int q = 32LL * scale * ff_mpeg1_default_intra_matrix[i] * ff_aanscales[i];
333 a->q_intra_matrix[i] = (((int64_t)a->inv_qscale << 30) + q / 2) / q;
334 } else {
335 int q = 32 * scale * ff_mpeg1_default_intra_matrix[i];
336 a->q_intra_matrix[i] = ((a->inv_qscale << 16) + q / 2) / q;
337 }
338 }
339
340 return 0;
341 }
342
343 #if CONFIG_ASV1_ENCODER
344 AVCodec ff_asv1_encoder = {
345 .name = "asv1",
346 .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
347 .type = AVMEDIA_TYPE_VIDEO,
348 .id = AV_CODEC_ID_ASV1,
349 .priv_data_size = sizeof(ASV1Context),
350 .init = encode_init,
351 .encode2 = encode_frame,
352 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
353 AV_PIX_FMT_NONE },
354 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
355 };
356 #endif
357
358 #if CONFIG_ASV2_ENCODER
359 AVCodec ff_asv2_encoder = {
360 .name = "asv2",
361 .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
362 .type = AVMEDIA_TYPE_VIDEO,
363 .id = AV_CODEC_ID_ASV2,
364 .priv_data_size = sizeof(ASV1Context),
365 .init = encode_init,
366 .encode2 = encode_frame,
367 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
368 AV_PIX_FMT_NONE },
369 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
370 };
371 #endif
372