Libav
asvenc.c
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1 /*
2  * Copyright (c) 2003 Michael Niedermayer
3  *
4  * This file is part of Libav.
5  *
6  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
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 int 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  if (!i && ccp >= 8)
146  return AVERROR_BUG;
147  if (i)
148  put_bits(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]);
149  else
150  put_bits(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]);
151 
152  if (ccp) {
153  if (ccp & 8)
154  asv2_put_level(&a->pb, block[index + 0]);
155  if (ccp & 4)
156  asv2_put_level(&a->pb, block[index + 8]);
157  if (ccp & 2)
158  asv2_put_level(&a->pb, block[index + 1]);
159  if (ccp & 1)
160  asv2_put_level(&a->pb, block[index + 9]);
161  }
162  }
163 
164  return 0;
165 }
166 
167 #define MAX_MB_SIZE (30 * 16 * 16 * 3 / 2 / 8)
168 
169 static inline int encode_mb(ASV1Context *a, int16_t block[6][64])
170 {
171  int i, ret;
172 
173  if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb) >> 3) < MAX_MB_SIZE) {
174  av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
175  return -1;
176  }
177 
178  if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
179  for (i = 0; i < 6; i++)
180  asv1_encode_block(a, block[i]);
181  } else {
182  for (i = 0; i < 6; i++) {
183  ret = asv2_encode_block(a, block[i]);
184  if (ret < 0)
185  return ret;
186  }
187  }
188  return 0;
189 }
190 
191 static inline void dct_get(ASV1Context *a, const AVFrame *frame,
192  int mb_x, int mb_y)
193 {
194  int16_t (*block)[64] = a->block;
195  int linesize = frame->linesize[0];
196  int i;
197 
198  uint8_t *ptr_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16;
199  uint8_t *ptr_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
200  uint8_t *ptr_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
201 
202  a->pdsp.get_pixels(block[0], ptr_y, linesize);
203  a->pdsp.get_pixels(block[1], ptr_y + 8, linesize);
204  a->pdsp.get_pixels(block[2], ptr_y + 8 * linesize, linesize);
205  a->pdsp.get_pixels(block[3], ptr_y + 8 * linesize + 8, linesize);
206  for (i = 0; i < 4; i++)
207  a->fdsp.fdct(block[i]);
208 
209  if (!(a->avctx->flags & AV_CODEC_FLAG_GRAY)) {
210  a->pdsp.get_pixels(block[4], ptr_cb, frame->linesize[1]);
211  a->pdsp.get_pixels(block[5], ptr_cr, frame->linesize[2]);
212  for (i = 4; i < 6; i++)
213  a->fdsp.fdct(block[i]);
214  }
215 }
216 
217 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
218  const AVFrame *pict, int *got_packet)
219 {
220  ASV1Context *const a = avctx->priv_data;
221  int size, ret;
222  int mb_x, mb_y;
223 
224  if (!pkt->data &&
225  (ret = av_new_packet(pkt, a->mb_height * a->mb_width * MAX_MB_SIZE +
226  AV_INPUT_BUFFER_MIN_SIZE)) < 0) {
227  av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
228  return ret;
229  }
230 
231  init_put_bits(&a->pb, pkt->data, pkt->size);
232 
233  for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
234  for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
235  dct_get(a, pict, mb_x, mb_y);
236  encode_mb(a, a->block);
237  }
238  }
239 
240  if (a->mb_width2 != a->mb_width) {
241  mb_x = a->mb_width2;
242  for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
243  dct_get(a, pict, mb_x, mb_y);
244  encode_mb(a, a->block);
245  }
246  }
247 
248  if (a->mb_height2 != a->mb_height) {
249  mb_y = a->mb_height2;
250  for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
251  dct_get(a, pict, mb_x, mb_y);
252  encode_mb(a, a->block);
253  }
254  }
255  emms_c();
256 
258  while (put_bits_count(&a->pb) & 31)
259  put_bits(&a->pb, 8, 0);
260 
261  size = put_bits_count(&a->pb) / 32;
262 
263  if (avctx->codec_id == AV_CODEC_ID_ASV1) {
264  a->bbdsp.bswap_buf((uint32_t *) pkt->data,
265  (uint32_t *) pkt->data, size);
266  } else {
267  int i;
268  for (i = 0; i < 4 * size; i++)
269  pkt->data[i] = ff_reverse[pkt->data[i]];
270  }
271 
272  pkt->size = size * 4;
273  pkt->flags |= AV_PKT_FLAG_KEY;
274  *got_packet = 1;
275 
276  return 0;
277 }
278 
280 {
281  ASV1Context *const a = avctx->priv_data;
282  int i;
283  const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
284 
285 #if FF_API_CODED_FRAME
288  avctx->coded_frame->key_frame = 1;
290 #endif
291 
292  ff_asv_common_init(avctx);
293  ff_fdctdsp_init(&a->fdsp, avctx);
294  ff_pixblockdsp_init(&a->pdsp, avctx);
295 
296  if (avctx->global_quality == 0)
297  avctx->global_quality = 4 * FF_QUALITY_SCALE;
298 
299  a->inv_qscale = (32 * scale * FF_QUALITY_SCALE +
300  avctx->global_quality / 2) / avctx->global_quality;
301 
302  avctx->extradata = av_mallocz(8);
303  if (!avctx->extradata)
304  return AVERROR(ENOMEM);
305  avctx->extradata_size = 8;
306  ((uint32_t *) avctx->extradata)[0] = av_le2ne32(a->inv_qscale);
307  ((uint32_t *) avctx->extradata)[1] = av_le2ne32(AV_RL32("ASUS"));
308 
309  for (i = 0; i < 64; i++) {
310  int q = 32 * scale * ff_mpeg1_default_intra_matrix[i];
311  a->q_intra_matrix[i] = ((a->inv_qscale << 16) + q / 2) / q;
312  }
313 
314  return 0;
315 }
316 
317 #if CONFIG_ASV1_ENCODER
318 AVCodec ff_asv1_encoder = {
319  .name = "asv1",
320  .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
321  .type = AVMEDIA_TYPE_VIDEO,
322  .id = AV_CODEC_ID_ASV1,
323  .priv_data_size = sizeof(ASV1Context),
324  .init = encode_init,
325  .encode2 = encode_frame,
326  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
327  AV_PIX_FMT_NONE },
328  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
329 };
330 #endif
331 
332 #if CONFIG_ASV2_ENCODER
333 AVCodec ff_asv2_encoder = {
334  .name = "asv2",
335  .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
336  .type = AVMEDIA_TYPE_VIDEO,
337  .id = AV_CODEC_ID_ASV2,
338  .priv_data_size = sizeof(ASV1Context),
339  .init = encode_init,
340  .encode2 = encode_frame,
341  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
342  AV_PIX_FMT_NONE },
343  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
344 };
345 #endif
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet)
Definition: asvenc.c:217
int size
This structure describes decoded (raw) audio or video data.
Definition: frame.h:140
const uint8_t ff_asv_ac_ccp_tab[16][2]
Definition: asv.c:60
static void put_sbits(PutBitContext *pb, int n, int32_t value)
Definition: put_bits.h:172
memory handling functions
int16_t block[6][64]
Definition: asv.h:57
int size
Definition: avcodec.h:1347
AVCodecContext * avctx
Definition: asv.h:43
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
#define FF_QUALITY_SCALE
Definition: avutil.h:217
void avpriv_align_put_bits(PutBitContext *s)
Pad the bitstream with zeros up to the next byte boundary.
Definition: bitstream.c:46
#define av_le2ne32(x)
Definition: bswap.h:98
av_cold void ff_fdctdsp_init(FDCTDSPContext *c, AVCodecContext *avctx)
Definition: fdctdsp.c:26
AVCodec.
Definition: avcodec.h:3120
PixblockDSPContext pdsp
Definition: asv.h:48
Macro definitions for various function/variable attributes.
static int16_t block[64]
Definition: dct.c:97
#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:66
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: bswapdsp.h:25
#define emms_c()
Definition: internal.h:48
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1523
const uint8_t ff_asv_ccp_tab[17][2]
Definition: asv.c:43
uint8_t * data
Definition: avcodec.h:1346
const uint8_t ff_asv_dc_ccp_tab[8][2]
Definition: asv.c:55
int mb_height2
Definition: asv.h:56
static void asv2_put_level(PutBitContext *pb, int level)
Definition: asvenc.c:53
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:763
#define AV_INPUT_BUFFER_MIN_SIZE
minimum encoding buffer size Used to avoid some checks during header writing.
Definition: avcodec.h:645
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1378
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:84
const uint16_t ff_mpeg1_default_intra_matrix[64]
Definition: mpeg12data.c:30
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
BswapDSPContext bbdsp
Definition: asv.h:45
#define AVERROR(e)
Definition: error.h:43
void(* get_pixels)(int16_t *block, const uint8_t *pixels, int line_size)
Definition: pixblockdsp.h:27
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:148
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1503
uint8_t * buf
Definition: put_bits.h:38
static int encode_mb(ASV1Context *a, int16_t block[6][64])
Definition: asvenc.c:169
const char * name
Name of the codec implementation.
Definition: avcodec.h:3127
static void put_bits(PutBitContext *s, int n, unsigned int value)
Write up to 31 bits into a bitstream.
Definition: put_bits.h:134
ASUS V1/V2 encoder/decoder common data.
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1352
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:67
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:201
static av_cold int encode_init(AVCodecContext *avctx)
Definition: asvenc.c:279
#define AV_RL32
Definition: intreadwrite.h:146
void(* fdct)(int16_t *block)
Definition: fdctdsp.h:27
int mb_width
Definition: asv.h:53
static void asv1_encode_block(ASV1Context *a, int16_t block[64])
Definition: asvenc.c:65
Libavcodec external API header.
enum AVCodecID codec_id
Definition: avcodec.h:1426
#define MAX_MB_SIZE
Definition: asvenc.c:167
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:158
main external API structure.
Definition: avcodec.h:1409
PutBitContext pb
Definition: asv.h:49
int q_intra_matrix[64]
Definition: asv.h:59
MPEG-1/2 tables.
uint8_t * buf_end
Definition: put_bits.h:38
static void asv1_put_level(PutBitContext *pb, int level)
Definition: asvenc.c:41
int extradata_size
Definition: avcodec.h:1524
FDCTDSPContext fdsp
Definition: asv.h:46
#define AVERROR_BUG
Bug detected, please report the issue.
Definition: error.h:60
static void dct_get(ASV1Context *a, const AVFrame *frame, int mb_x, int mb_y)
Definition: asvenc.c:191
int index
Definition: gxfenc.c:72
av_cold void ff_pixblockdsp_init(PixblockDSPContext *c, AVCodecContext *avctx)
Definition: pixblockdsp.c:54
int mb_width2
Definition: asv.h:55
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:257
int global_quality
Global quality for codecs which cannot change it per frame.
Definition: avcodec.h:1489
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:146
uint8_t level
Definition: svq3.c:204
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:59
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:77
int inv_qscale
Definition: asv.h:52
common internal api header.
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2797
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:582
void * priv_data
Definition: avcodec.h:1451
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:78
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:196
static void asv2_put_bits(PutBitContext *pb, int n, int v)
Definition: asvenc.c:36
static int asv2_encode_block(ASV1Context *a, int16_t block[64])
Definition: asvenc.c:111
const uint8_t ff_reverse[256]
Definition: mathtables.c:72
const uint8_t ff_asv_scantab[64]
Definition: asv.c:32
const uint8_t ff_asv_level_tab[7][2]
Definition: asv.c:51
AVPixelFormat
Pixel format.
Definition: pixfmt.h:57
This structure stores compressed data.
Definition: avcodec.h:1323
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:211
int mb_height
Definition: asv.h:54