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asvenc.c
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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 "asv.h"
30 #include "avcodec.h"
31 #include "fdctdsp.h"
32 #include "internal.h"
33 #include "mathops.h"
34 #include "mpeg12data.h"
35 
36 static inline void asv2_put_bits(PutBitContext *pb, int n, int v)
37 {
38  put_bits(pb, n, ff_reverse[v << (8 - n)]);
39 }
40 
41 static inline void asv1_put_level(PutBitContext *pb, int level)
42 {
43  unsigned int index = level + 3;
44 
45  if (index <= 6) {
46  put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]);
47  } else {
48  put_bits(pb, ff_asv_level_tab[3][1], ff_asv_level_tab[3][0]);
49  put_sbits(pb, 8, level);
50  }
51 }
52 
53 static inline void asv2_put_level(PutBitContext *pb, int level)
54 {
55  unsigned int index = level + 31;
56 
57  if (index <= 62) {
58  put_bits(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]);
59  } else {
60  put_bits(pb, ff_asv2_level_tab[31][1], ff_asv2_level_tab[31][0]);
61  asv2_put_bits(pb, 8, level & 0xFF);
62  }
63 }
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, ff_asv_ccp_tab[0][1], ff_asv_ccp_tab[0][0]);
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, ff_asv_ccp_tab[16][1], ff_asv_ccp_tab[16][0]);
109 }
110 
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  asv2_put_bits(&a->pb, 4, count);
125  asv2_put_bits(&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(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]);
148  else
149  put_bits(&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->pb, block[index + 0]);
154  if (ccp & 4)
155  asv2_put_level(&a->pb, block[index + 8]);
156  if (ccp & 2)
157  asv2_put_level(&a->pb, block[index + 1]);
158  if (ccp & 1)
159  asv2_put_level(&a->pb, block[index + 9]);
160  }
161  }
162 }
163 
164 #define MAX_MB_SIZE (30 * 16 * 16 * 3 / 2 / 8)
165 
166 static inline int encode_mb(ASV1Context *a, int16_t block[6][64])
167 {
168  int i;
169 
170  if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb) >> 3) < MAX_MB_SIZE) {
171  av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
172  return -1;
173  }
174 
175  if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
176  for (i = 0; i < 6; i++)
177  asv1_encode_block(a, block[i]);
178  } else {
179  for (i = 0; i < 6; i++)
180  asv2_encode_block(a, block[i]);
181  }
182  return 0;
183 }
184 
185 static inline void dct_get(ASV1Context *a, const AVFrame *frame,
186  int mb_x, int mb_y)
187 {
188  int16_t (*block)[64] = a->block;
189  int linesize = frame->linesize[0];
190  int i;
191 
192  uint8_t *ptr_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16;
193  uint8_t *ptr_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
194  uint8_t *ptr_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
195 
196  a->pdsp.get_pixels(block[0], ptr_y, linesize);
197  a->pdsp.get_pixels(block[1], ptr_y + 8, linesize);
198  a->pdsp.get_pixels(block[2], ptr_y + 8 * linesize, linesize);
199  a->pdsp.get_pixels(block[3], ptr_y + 8 * linesize + 8, linesize);
200  for (i = 0; i < 4; i++)
201  a->fdsp.fdct(block[i]);
202 
203  if (!(a->avctx->flags & CODEC_FLAG_GRAY)) {
204  a->pdsp.get_pixels(block[4], ptr_cb, frame->linesize[1]);
205  a->pdsp.get_pixels(block[5], ptr_cr, frame->linesize[2]);
206  for (i = 4; i < 6; i++)
207  a->fdsp.fdct(block[i]);
208  }
209 }
210 
212  const AVFrame *pict, int *got_packet)
213 {
214  ASV1Context *const a = avctx->priv_data;
215  int size, ret;
216  int mb_x, mb_y;
217 
218  if (pict->width % 16 || pict->height % 16) {
219  AVFrame *clone = av_frame_alloc();
220  int i;
221 
222  if (!clone)
223  return AVERROR(ENOMEM);
224  clone->format = pict->format;
225  clone->width = FFALIGN(pict->width, 16);
226  clone->height = FFALIGN(pict->height, 16);
227  ret = av_frame_get_buffer(clone, 32);
228  if (ret < 0) {
229  av_frame_free(&clone);
230  return ret;
231  }
232 
233  ret = av_frame_copy(clone, pict);
234  if (ret < 0) {
235  av_frame_free(&clone);
236  return ret;
237  }
238 
239  for (i = 0; i<3; i++) {
240  int x, y;
241  int w = FF_CEIL_RSHIFT(pict->width, !!i);
242  int h = FF_CEIL_RSHIFT(pict->height, !!i);
243  int w2 = FF_CEIL_RSHIFT(clone->width, !!i);
244  int h2 = FF_CEIL_RSHIFT(clone->height, !!i);
245  for (y=0; y<h; y++)
246  for (x=w; x<w2; x++)
247  clone->data[i][x + y*clone->linesize[i]] =
248  clone->data[i][w - 1 + y*clone->linesize[i]];
249  for (y=h; y<h2; y++)
250  for (x=0; x<w2; x++)
251  clone->data[i][x + y*clone->linesize[i]] =
252  clone->data[i][x + (h-1)*clone->linesize[i]];
253  }
254  ret = encode_frame(avctx, pkt, clone, got_packet);
255 
256  av_frame_free(&clone);
257  return ret;
258  }
259 
260  if ((ret = ff_alloc_packet2(avctx, pkt, a->mb_height * a->mb_width * MAX_MB_SIZE +
261  FF_MIN_BUFFER_SIZE)) < 0)
262  return ret;
263 
264  init_put_bits(&a->pb, pkt->data, pkt->size);
265 
266  for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
267  for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
268  dct_get(a, pict, mb_x, mb_y);
269  encode_mb(a, a->block);
270  }
271  }
272 
273  if (a->mb_width2 != a->mb_width) {
274  mb_x = a->mb_width2;
275  for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
276  dct_get(a, pict, mb_x, mb_y);
277  encode_mb(a, a->block);
278  }
279  }
280 
281  if (a->mb_height2 != a->mb_height) {
282  mb_y = a->mb_height2;
283  for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
284  dct_get(a, pict, mb_x, mb_y);
285  encode_mb(a, a->block);
286  }
287  }
288  emms_c();
289 
291  while (put_bits_count(&a->pb) & 31)
292  put_bits(&a->pb, 8, 0);
293 
294  size = put_bits_count(&a->pb) / 32;
295 
296  if (avctx->codec_id == AV_CODEC_ID_ASV1) {
297  a->bbdsp.bswap_buf((uint32_t *) pkt->data,
298  (uint32_t *) pkt->data, size);
299  } else {
300  int i;
301  for (i = 0; i < 4 * size; i++)
302  pkt->data[i] = ff_reverse[pkt->data[i]];
303  }
304 
305  pkt->size = size * 4;
306  pkt->flags |= AV_PKT_FLAG_KEY;
307  *got_packet = 1;
308 
309  return 0;
310 }
311 
313 {
314  ASV1Context *const a = avctx->priv_data;
315  int i;
316  const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
317 
318  ff_asv_common_init(avctx);
319  ff_fdctdsp_init(&a->fdsp, avctx);
320  ff_pixblockdsp_init(&a->pdsp, avctx);
321 
322  if (avctx->global_quality <= 0)
323  avctx->global_quality = 4 * FF_QUALITY_SCALE;
324 
325  a->inv_qscale = (32 * scale * FF_QUALITY_SCALE +
326  avctx->global_quality / 2) / avctx->global_quality;
327 
328  avctx->extradata = av_mallocz(8);
329  avctx->extradata_size = 8;
330  ((uint32_t *) avctx->extradata)[0] = av_le2ne32(a->inv_qscale);
331  ((uint32_t *) avctx->extradata)[1] = av_le2ne32(AV_RL32("ASUS"));
332 
333  for (i = 0; i < 64; i++) {
334  int q = 32 * scale * ff_mpeg1_default_intra_matrix[i];
335  a->q_intra_matrix[i] = ((a->inv_qscale << 16) + q / 2) / q;
336  }
337 
338  return 0;
339 }
340 
341 #if CONFIG_ASV1_ENCODER
342 AVCodec ff_asv1_encoder = {
343  .name = "asv1",
344  .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
345  .type = AVMEDIA_TYPE_VIDEO,
346  .id = AV_CODEC_ID_ASV1,
347  .priv_data_size = sizeof(ASV1Context),
348  .init = encode_init,
349  .encode2 = encode_frame,
350  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
351  AV_PIX_FMT_NONE },
352 };
353 #endif
354 
355 #if CONFIG_ASV2_ENCODER
356 AVCodec ff_asv2_encoder = {
357  .name = "asv2",
358  .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
359  .type = AVMEDIA_TYPE_VIDEO,
360  .id = AV_CODEC_ID_ASV2,
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 };
367 #endif