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 "mathops.h"
33 #include "mpeg12data.h"
34 
35 static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
36  put_bits(pb, n, ff_reverse[ v << (8-n) ]);
37 }
38 
39 static inline void asv1_put_level(PutBitContext *pb, int level){
40  unsigned int index= level + 3;
41 
42  if(index <= 6) put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]);
43  else{
44  put_bits(pb, ff_asv_level_tab[3][1], ff_asv_level_tab[3][0]);
45  put_sbits(pb, 8, level);
46  }
47 }
48 
49 static inline void asv2_put_level(PutBitContext *pb, int level){
50  unsigned int index= level + 31;
51 
52  if(index <= 62) put_bits(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]);
53  else{
54  put_bits(pb, ff_asv2_level_tab[31][1], ff_asv2_level_tab[31][0]);
55  asv2_put_bits(pb, 8, level&0xFF);
56  }
57 }
58 
59 static inline void asv1_encode_block(ASV1Context *a, int16_t block[64]){
60  int i;
61  int nc_count=0;
62 
63  put_bits(&a->pb, 8, (block[0] + 32)>>6);
64  block[0]= 0;
65 
66  for(i=0; i<10; i++){
67  const int index = ff_asv_scantab[4*i];
68  int ccp=0;
69 
70  if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
71  if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
72  if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
73  if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
74 
75  if(ccp){
76  for(;nc_count; nc_count--)
77  put_bits(&a->pb, ff_asv_ccp_tab[0][1], ff_asv_ccp_tab[0][0]);
78 
79  put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][0]);
80 
81  if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);
82  if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);
83  if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);
84  if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);
85  }else{
86  nc_count++;
87  }
88  }
89  put_bits(&a->pb, ff_asv_ccp_tab[16][1], ff_asv_ccp_tab[16][0]);
90 }
91 
92 static inline void asv2_encode_block(ASV1Context *a, int16_t block[64]){
93  int i;
94  int count=0;
95 
96  for(count=63; count>3; count--){
97  const int index = ff_asv_scantab[count];
98 
99  if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 )
100  break;
101  }
102 
103  count >>= 2;
104 
105  asv2_put_bits(&a->pb, 4, count);
106  asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);
107  block[0]= 0;
108 
109  for(i=0; i<=count; i++){
110  const int index = ff_asv_scantab[4*i];
111  int ccp=0;
112 
113  if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
114  if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
115  if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
116  if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
117 
118  assert(i || ccp<8);
119  if(i) put_bits(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]);
120  else put_bits(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]);
121 
122  if(ccp){
123  if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);
124  if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);
125  if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);
126  if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);
127  }
128  }
129 }
130 
131 #define MAX_MB_SIZE (30*16*16*3/2/8)
132 
133 static inline int encode_mb(ASV1Context *a, int16_t block[6][64]){
134  int i;
135 
136  if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < MAX_MB_SIZE) {
137  av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
138  return -1;
139  }
140 
141  if(a->avctx->codec_id == AV_CODEC_ID_ASV1){
142  for(i=0; i<6; i++)
143  asv1_encode_block(a, block[i]);
144  }else{
145  for(i=0; i<6; i++)
146  asv2_encode_block(a, block[i]);
147  }
148  return 0;
149 }
150 
151 static inline void dct_get(ASV1Context *a, const AVFrame *frame,
152  int mb_x, int mb_y)
153 {
154  int16_t (*block)[64]= a->block;
155  int linesize = frame->linesize[0];
156  int i;
157 
158  uint8_t *ptr_y = frame->data[0] + (mb_y * 16* linesize ) + mb_x * 16;
159  uint8_t *ptr_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
160  uint8_t *ptr_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
161 
162  a->pdsp.get_pixels(block[0], ptr_y, linesize);
163  a->pdsp.get_pixels(block[1], ptr_y + 8, linesize);
164  a->pdsp.get_pixels(block[2], ptr_y + 8 * linesize, linesize);
165  a->pdsp.get_pixels(block[3], ptr_y + 8 * linesize + 8, linesize);
166  for(i=0; i<4; i++)
167  a->fdsp.fdct(block[i]);
168 
169  if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
170  a->pdsp.get_pixels(block[4], ptr_cb, frame->linesize[1]);
171  a->pdsp.get_pixels(block[5], ptr_cr, frame->linesize[2]);
172  for(i=4; i<6; i++)
173  a->fdsp.fdct(block[i]);
174  }
175 }
176 
177 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
178  const AVFrame *pict, int *got_packet)
179 {
180  ASV1Context * const a = avctx->priv_data;
181  int size, ret;
182  int mb_x, mb_y;
183 
184  if (!pkt->data &&
185  (ret = av_new_packet(pkt, a->mb_height*a->mb_width*MAX_MB_SIZE +
186  FF_MIN_BUFFER_SIZE)) < 0) {
187  av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
188  return ret;
189  }
190 
191  init_put_bits(&a->pb, pkt->data, pkt->size);
192 
193  for(mb_y=0; mb_y<a->mb_height2; mb_y++){
194  for(mb_x=0; mb_x<a->mb_width2; mb_x++){
195  dct_get(a, pict, mb_x, mb_y);
196  encode_mb(a, a->block);
197  }
198  }
199 
200  if(a->mb_width2 != a->mb_width){
201  mb_x= a->mb_width2;
202  for(mb_y=0; mb_y<a->mb_height2; mb_y++){
203  dct_get(a, pict, mb_x, mb_y);
204  encode_mb(a, a->block);
205  }
206  }
207 
208  if(a->mb_height2 != a->mb_height){
209  mb_y= a->mb_height2;
210  for(mb_x=0; mb_x<a->mb_width; mb_x++){
211  dct_get(a, pict, mb_x, mb_y);
212  encode_mb(a, a->block);
213  }
214  }
215  emms_c();
216 
218  while(put_bits_count(&a->pb)&31)
219  put_bits(&a->pb, 8, 0);
220 
221  size= put_bits_count(&a->pb)/32;
222 
223  if(avctx->codec_id == AV_CODEC_ID_ASV1)
224  a->bbdsp.bswap_buf((uint32_t *) pkt->data,
225  (uint32_t *) pkt->data, size);
226  else{
227  int i;
228  for(i=0; i<4*size; i++)
229  pkt->data[i] = ff_reverse[pkt->data[i]];
230  }
231 
232  pkt->size = size*4;
233  pkt->flags |= AV_PKT_FLAG_KEY;
234  *got_packet = 1;
235 
236  return 0;
237 }
238 
239 static av_cold int encode_init(AVCodecContext *avctx){
240  ASV1Context * const a = avctx->priv_data;
241  int i;
242  const int scale= avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
243 
244  avctx->coded_frame = av_frame_alloc();
245  if (!avctx->coded_frame)
246  return AVERROR(ENOMEM);
248  avctx->coded_frame->key_frame = 1;
249 
250  ff_asv_common_init(avctx);
251  ff_fdctdsp_init(&a->fdsp, avctx);
252  ff_pixblockdsp_init(&a->pdsp, avctx);
253 
254  if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
255 
256  a->inv_qscale= (32*scale*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality;
257 
258  avctx->extradata= av_mallocz(8);
259  avctx->extradata_size=8;
260  ((uint32_t*)avctx->extradata)[0]= av_le2ne32(a->inv_qscale);
261  ((uint32_t*)avctx->extradata)[1]= av_le2ne32(AV_RL32("ASUS"));
262 
263  for(i=0; i<64; i++){
264  int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
265  a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
266  }
267 
268  return 0;
269 }
271 {
272  av_frame_free(&avctx->coded_frame);
273 
274  return 0;
275 }
276 
277 #if CONFIG_ASV1_ENCODER
278 AVCodec ff_asv1_encoder = {
279  .name = "asv1",
280  .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
281  .type = AVMEDIA_TYPE_VIDEO,
282  .id = AV_CODEC_ID_ASV1,
283  .priv_data_size = sizeof(ASV1Context),
284  .init = encode_init,
285  .encode2 = encode_frame,
287  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
288  AV_PIX_FMT_NONE },
289 };
290 #endif
291 
292 #if CONFIG_ASV2_ENCODER
293 AVCodec ff_asv2_encoder = {
294  .name = "asv2",
295  .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
296  .type = AVMEDIA_TYPE_VIDEO,
297  .id = AV_CODEC_ID_ASV2,
298  .priv_data_size = sizeof(ASV1Context),
299  .init = encode_init,
300  .encode2 = encode_frame,
302  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
303  AV_PIX_FMT_NONE },
304 };
305 #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:177
int size
This structure describes decoded (raw) audio or video data.
Definition: frame.h:135
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
AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2532
int size
Definition: avcodec.h:974
AVCodecContext * avctx
Definition: asv.h:43
#define FF_QUALITY_SCALE
Definition: avutil.h:210
void avpriv_align_put_bits(PutBitContext *s)
Pad the bitstream with zeros up to the next byte boundary.
Definition: bitstream.c:45
#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:2796
PixblockDSPContext pdsp
Definition: asv.h:48
Macro definitions for various function/variable attributes.
const uint8_t ff_asv2_level_tab[63][2]
Definition: asv.c:67
uint8_t
#define av_cold
Definition: attributes.h:66
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:57
#define emms_c()
Definition: internal.h:47
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1164
const uint8_t ff_asv_ccp_tab[17][2]
Definition: asv.c:43
uint8_t * data
Definition: avcodec.h:973
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:49
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1019
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:81
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:123
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
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:69
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:150
int flags
CODEC_FLAG_*.
Definition: avcodec.h:1144
uint8_t * buf
Definition: put_bits.h:38
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:168
static int encode_mb(ASV1Context *a, int16_t block[6][64])
Definition: asvenc.c:133
const char * name
Name of the codec implementation.
Definition: avcodec.h:2803
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:979
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:67
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:196
#define FF_MIN_BUFFER_SIZE
minimum encoding buffer size Used to avoid some checks during header writing.
Definition: avcodec.h:538
static av_cold int encode_init(AVCodecContext *avctx)
Definition: asvenc.c:239
#define AV_RL32
Definition: intreadwrite.h:146
int mb_width
Definition: asv.h:53
static void asv1_encode_block(ASV1Context *a, int16_t block[64])
Definition: asvenc.c:59
Libavcodec external API header.
enum AVCodecID codec_id
Definition: avcodec.h:1067
#define MAX_MB_SIZE
Definition: asvenc.c:131
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:153
void(* fdct)(int16_t *block)
Definition: fdctdsp.h:27
main external API structure.
Definition: avcodec.h:1050
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:490
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:39
int extradata_size
Definition: avcodec.h:1165
FDCTDSPContext fdsp
Definition: asv.h:46
static void dct_get(ASV1Context *a, const AVFrame *frame, int mb_x, int mb_y)
Definition: asvenc.c:151
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
int global_quality
Global quality for codecs which cannot change it per frame.
Definition: avcodec.h:1130
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:141
uint8_t level
Definition: svq3.c:147
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
int inv_qscale
Definition: asv.h:52
#define CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:637
static void asv2_encode_block(ASV1Context *a, int16_t block[64])
Definition: asvenc.c:92
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:499
void * priv_data
Definition: avcodec.h:1092
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:191
static void asv2_put_bits(PutBitContext *pb, int n, int v)
Definition: asvenc.c:35
static av_cold int asv_encode_close(AVCodecContext *avctx)
Definition: asvenc.c:270
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:63
This structure stores compressed data.
Definition: avcodec.h:950
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:205
int mb_height
Definition: asv.h:54
static int16_t block[64]
Definition: dct-test.c:88