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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 "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 
38 static inline void asv2_put_bits(PutBitContext *pb, int n, int v)
39 {
40  put_bits(pb, n, ff_reverse[v << (8 - n)]);
41 }
42 
43 static 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 
55 static 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, "Cliping level %d, increase qscale\n", level);
65  level = av_clip_int8(level);
66  }
67  asv2_put_bits(pb, 8, level & 0xFF);
68  }
69 }
70 
71 static 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 
117 static 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 
172 static 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 
192 static 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 
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 
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 
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
356 AVCodec 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
371 AVCodec 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
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: bswapdsp.h:25
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet)
Definition: asvenc.c:218
This structure describes decoded (raw) audio or video data.
Definition: frame.h:180
const uint8_t ff_asv_ac_ccp_tab[16][2]
Definition: asv.c:60
void ff_fdct_ifast(int16_t *data)
Definition: jfdctfst.c:208
static void put_sbits(PutBitContext *pb, int n, int32_t value)
Definition: put_bits.h:200
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:206
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
memory handling functions
int16_t block[6][64]
Definition: asv.h:57
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int size
Definition: avcodec.h:1578
AVCodecContext * avctx
Definition: asv.h:43
#define FF_QUALITY_SCALE
Definition: avutil.h:222
void avpriv_align_put_bits(PutBitContext *s)
Pad the bitstream with zeros up to the next byte boundary.
Definition: bitstream.c:49
static AVPacket pkt
#define av_le2ne32(x)
Definition: bswap.h:96
av_cold void ff_fdctdsp_init(FDCTDSPContext *c, AVCodecContext *avctx)
Definition: fdctdsp.c:26
AVCodec.
Definition: avcodec.h:3535
PixblockDSPContext pdsp
Definition: asv.h:48
Macro definitions for various function/variable attributes.
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:40
const uint8_t ff_asv2_level_tab[63][2]
Definition: asv.c:67
uint8_t
#define av_cold
Definition: attributes.h:82
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:140
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
void(* get_pixels)(int16_t *block, const uint8_t *pixels, ptrdiff_t line_size)
Definition: pixblockdsp.h:27
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1757
static AVFrame * frame
const uint8_t ff_asv_ccp_tab[17][2]
Definition: asv.c:43
const uint16_t ff_aanscales[64]
Definition: aandcttab.c:26
uint8_t * data
Definition: avcodec.h:1577
const uint8_t ff_asv_dc_ccp_tab[8][2]
Definition: asv.c:55
ptrdiff_t size
Definition: opengl_enc.c:101
int mb_height2
Definition: asv.h:56
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:855
#define AV_INPUT_BUFFER_MIN_SIZE
minimum encoding buffer size Used to avoid some checks during header writing.
Definition: avcodec.h:735
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1609
int width
width and height of the video frame
Definition: frame.h:232
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
BswapDSPContext bbdsp
Definition: asv.h:45
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:153
av_cold void ff_asv_common_init(AVCodecContext *avctx)
Definition: asv.c:83
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
const uint8_t ff_reverse[256]
Definition: reverse.c:23
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1737
uint8_t * buf
Definition: put_bits.h:38
static int encode_mb(ASV1Context *a, int16_t block[6][64])
Definition: asvenc.c:172
const char * name
Name of the codec implementation.
Definition: avcodec.h:3542
GLsizei count
Definition: opengl_enc.c:109
av_cold void ff_pixblockdsp_init(PixblockDSPContext *c, AVCodecContext *avctx)
Definition: pixblockdsp.c:81
ASUS V1/V2 encoder/decoder common data.
int av_frame_copy(AVFrame *dst, const AVFrame *src)
Copy the frame data from src to dst.
Definition: frame.c:704
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1583
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:85
static av_cold int encode_init(AVCodecContext *avctx)
Definition: asvenc.c:319
int n
Definition: avisynth_c.h:547
int mb_width
Definition: asv.h:53
static void asv1_encode_block(ASV1Context *a, int16_t block[64])
Definition: asvenc.c:71
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:244
Libavcodec external API header.
enum AVCodecID codec_id
Definition: avcodec.h:1659
#define MAX_MB_SIZE
Definition: asvenc.c:170
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:211
void(* fdct)(int16_t *block)
Definition: fdctdsp.h:27
main external API structure.
Definition: avcodec.h:1642
PutBitContext pb
Definition: asv.h:49
int q_intra_matrix[64]
Definition: asv.h:59
MPEG1/2 tables.
uint8_t * buf_end
Definition: put_bits.h:38
static void asv1_put_level(PutBitContext *pb, int level)
Definition: asvenc.c:43
int extradata_size
Definition: avcodec.h:1758
FDCTDSPContext fdsp
Definition: asv.h:46
static void dct_get(ASV1Context *a, const AVFrame *frame, int mb_x, int mb_y)
Definition: asvenc.c:192
int index
Definition: gxfenc.c:89
const uint16_t ff_mpeg1_default_intra_matrix[256]
Definition: mpeg12data.c:30
int mb_width2
Definition: asv.h:55
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: utils.c:1683
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
int av_frame_get_buffer(AVFrame *frame, int align)
Allocate new buffer(s) for audio or video data.
Definition: frame.c:270
int global_quality
Global quality for codecs which cannot change it per frame.
Definition: avcodec.h:1723
AAN (Arai, Agui and Nakajima) (I)DCT tables.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:194
uint8_t level
Definition: svq3.c:193
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
int inv_qscale
Definition: asv.h:52
common internal api header.
static void asv2_encode_block(ASV1Context *a, int16_t block[64])
Definition: asvenc.c:117
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
void * priv_data
Definition: avcodec.h:1684
static void asv2_put_bits(PutBitContext *pb, int n, int v)
Definition: asvenc.c:38
int height
Definition: frame.h:232
static void asv2_put_level(ASV1Context *a, PutBitContext *pb, int level)
Definition: asvenc.c:55
const uint8_t ff_asv_scantab[64]
Definition: asv.c:32
const uint8_t ff_asv_level_tab[7][2]
Definition: asv.c:51
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
This structure stores compressed data.
Definition: avcodec.h:1554
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
int mb_height
Definition: asv.h:54
for(j=16;j >0;--j)
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
static int16_t block[64]
Definition: dct-test.c:112