FFmpeg: libavcodec/rv30.c Source File

FFmpeg
rv30.c
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1 /*
2  * RV30 decoder
3  * Copyright (c) 2007 Konstantin Shishkov
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * RV30 decoder
25  */
26 
27 #include "avcodec.h"
28 #include "mpegutils.h"
29 #include "mpegvideo.h"
30 #include "golomb.h"
31 
32 #include "rv34.h"
33 #include "rv30data.h"
34 
35 
36  static int rv30_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
37 {
38  AVCodecContext *avctx = r->s.avctx;
39  int mb_bits;
40  int w = r->s.width, h = r->s.height;
41  int mb_size;
42  int rpr;
43 
44  memset(si, 0, sizeof(SliceInfo));
45  if(get_bits(gb, 3))
46  return -1;
47  si->type = get_bits(gb, 2);
48  if(si->type == 1) si->type = 0;
49  if(get_bits1(gb))
50  return -1;
51  si->quant = get_bits(gb, 5);
52  skip_bits1(gb);
53  si->pts = get_bits(gb, 13);
54  rpr = get_bits(gb, av_log2(r->max_rpr) + 1);
55  if(rpr){
56  if (rpr > r->max_rpr) {
57  av_log(avctx, AV_LOG_ERROR, "rpr too large\n");
58  return AVERROR_INVALIDDATA;
59  }
60 
61  if (avctx->extradata_size < rpr * 2 + 8) {
62  av_log(avctx, AV_LOG_ERROR,
63  "Insufficient extradata - need at least %d bytes, got %d\n",
64  8 + rpr * 2, avctx->extradata_size);
65  return AVERROR(EINVAL);
66  }
67 
68  w = r->s.avctx->extradata[6 + rpr*2] << 2;
69  h = r->s.avctx->extradata[7 + rpr*2] << 2;
70  } else {
71  w = r->orig_width;
72  h = r->orig_height;
73  }
74  si->width = w;
75  si->height = h;
76  mb_size = ((w + 15) >> 4) * ((h + 15) >> 4);
77  mb_bits = ff_rv34_get_start_offset(gb, mb_size);
78  si->start = get_bits(gb, mb_bits);
79  skip_bits1(gb);
80  return 0;
81 }
82 
83 /**
84  * Decode 4x4 intra types array.
85  */
86  static int rv30_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst)
87 {
88  int i, j, k;
89 
90  for(i = 0; i < 4; i++, dst += r->intra_types_stride - 4){
91  for(j = 0; j < 4; j+= 2){
92  unsigned code = get_interleaved_ue_golomb(gb) << 1;
93  if (code > 80U*2U) {
94  av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction code\n");
95  return -1;
96  }
97  for(k = 0; k < 2; k++){
98  int A = dst[-r->intra_types_stride] + 1;
99  int B = dst[-1] + 1;
100  *dst++ = rv30_itype_from_context[A * 90 + B * 9 + rv30_itype_code[code + k]];
101  if(dst[-1] == 9){
102  av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction mode\n");
103  return -1;
104  }
105  }
106  }
107  }
108  return 0;
109 }
110 
111 /**
112  * Decode macroblock information.
113  */
114  static int rv30_decode_mb_info(RV34DecContext *r)
115 {
116  static const int rv30_p_types[6] = { RV34_MB_SKIP, RV34_MB_P_16x16, RV34_MB_P_8x8, -1, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
117  static const int rv30_b_types[6] = { RV34_MB_SKIP, RV34_MB_B_DIRECT, RV34_MB_B_FORWARD, RV34_MB_B_BACKWARD, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
118  MpegEncContext *s = &r->s;
119  GetBitContext *gb = &s->gb;
120  unsigned code = get_interleaved_ue_golomb(gb);
121 
122  if (code > 11) {
123  av_log(s->avctx, AV_LOG_ERROR, "Incorrect MB type code\n");
124  return -1;
125  }
126  if(code > 5){
127  av_log(s->avctx, AV_LOG_ERROR, "dquant needed\n");
128  code -= 6;
129  }
130  if(s->pict_type != AV_PICTURE_TYPE_B)
131  return rv30_p_types[code];
132  else
133  return rv30_b_types[code];
134 }
135 
136  static inline void rv30_weak_loop_filter(uint8_t *src, const int step,
137  const int stride, const int lim)
138 {
139  const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
140  int i, diff;
141 
142  for(i = 0; i < 4; i++){
143  diff = ((src[-2*step] - src[1*step]) - (src[-1*step] - src[0*step])*4) >> 3;
144  diff = av_clip(diff, -lim, lim);
145  src[-1*step] = cm[src[-1*step] + diff];
146  src[ 0*step] = cm[src[ 0*step] - diff];
147  src += stride;
148  }
149 }
150 
151  static void rv30_loop_filter(RV34DecContext *r, int row)
152 {
153  MpegEncContext *s = &r->s;
154  int mb_pos, mb_x;
155  int i, j, k;
156  uint8_t *Y, *C;
157  int loc_lim, cur_lim, left_lim = 0, top_lim = 0;
158 
159  mb_pos = row * s->mb_stride;
160  for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
161  int mbtype = s->current_picture_ptr->mb_type[mb_pos];
162  if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype))
163  r->deblock_coefs[mb_pos] = 0xFFFF;
164  if(IS_INTRA(mbtype))
165  r->cbp_chroma[mb_pos] = 0xFF;
166  }
167 
168  /* all vertical edges are filtered first
169  * and horizontal edges are filtered on the next iteration
170  */
171  mb_pos = row * s->mb_stride;
172  for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
173  cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
174  if(mb_x)
175  left_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - 1]];
176  for(j = 0; j < 16; j += 4){
177  Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize + 4 * !mb_x;
178  for(i = !mb_x; i < 4; i++, Y += 4){
179  int ij = i + j;
180  loc_lim = 0;
181  if(r->deblock_coefs[mb_pos] & (1 << ij))
182  loc_lim = cur_lim;
183  else if(!i && r->deblock_coefs[mb_pos - 1] & (1 << (ij + 3)))
184  loc_lim = left_lim;
185  else if( i && r->deblock_coefs[mb_pos] & (1 << (ij - 1)))
186  loc_lim = cur_lim;
187  if(loc_lim)
188  rv30_weak_loop_filter(Y, 1, s->linesize, loc_lim);
189  }
190  }
191  for(k = 0; k < 2; k++){
192  int cur_cbp, left_cbp = 0;
193  cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
194  if(mb_x)
195  left_cbp = (r->cbp_chroma[mb_pos - 1] >> (k*4)) & 0xF;
196  for(j = 0; j < 8; j += 4){
197  C = s->current_picture_ptr->f->data[k + 1] + mb_x*8 + (row*8 + j) * s->uvlinesize + 4 * !mb_x;
198  for(i = !mb_x; i < 2; i++, C += 4){
199  int ij = i + (j >> 1);
200  loc_lim = 0;
201  if (cur_cbp & (1 << ij))
202  loc_lim = cur_lim;
203  else if(!i && left_cbp & (1 << (ij + 1)))
204  loc_lim = left_lim;
205  else if( i && cur_cbp & (1 << (ij - 1)))
206  loc_lim = cur_lim;
207  if(loc_lim)
208  rv30_weak_loop_filter(C, 1, s->uvlinesize, loc_lim);
209  }
210  }
211  }
212  }
213  mb_pos = row * s->mb_stride;
214  for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
215  cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
216  if(row)
217  top_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - s->mb_stride]];
218  for(j = 4*!row; j < 16; j += 4){
219  Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize;
220  for(i = 0; i < 4; i++, Y += 4){
221  int ij = i + j;
222  loc_lim = 0;
223  if(r->deblock_coefs[mb_pos] & (1 << ij))
224  loc_lim = cur_lim;
225  else if(!j && r->deblock_coefs[mb_pos - s->mb_stride] & (1 << (ij + 12)))
226  loc_lim = top_lim;
227  else if( j && r->deblock_coefs[mb_pos] & (1 << (ij - 4)))
228  loc_lim = cur_lim;
229  if(loc_lim)
230  rv30_weak_loop_filter(Y, s->linesize, 1, loc_lim);
231  }
232  }
233  for(k = 0; k < 2; k++){
234  int cur_cbp, top_cbp = 0;
235  cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
236  if(row)
237  top_cbp = (r->cbp_chroma[mb_pos - s->mb_stride] >> (k*4)) & 0xF;
238  for(j = 4*!row; j < 8; j += 4){
239  C = s->current_picture_ptr->f->data[k+1] + mb_x*8 + (row*8 + j) * s->uvlinesize;
240  for(i = 0; i < 2; i++, C += 4){
241  int ij = i + (j >> 1);
242  loc_lim = 0;
243  if (r->cbp_chroma[mb_pos] & (1 << ij))
244  loc_lim = cur_lim;
245  else if(!j && top_cbp & (1 << (ij + 2)))
246  loc_lim = top_lim;
247  else if( j && cur_cbp & (1 << (ij - 2)))
248  loc_lim = cur_lim;
249  if(loc_lim)
250  rv30_weak_loop_filter(C, s->uvlinesize, 1, loc_lim);
251  }
252  }
253  }
254  }
255 }
256 
257 /**
258  * Initialize decoder.
259  */
260  static av_cold int rv30_decode_init(AVCodecContext *avctx)
261 {
262  RV34DecContext *r = avctx->priv_data;
263  int ret;
264 
265  r->orig_width = avctx->coded_width;
266  r->orig_height = avctx->coded_height;
267 
268  if (avctx->extradata_size < 2) {
269  av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
270  return AVERROR(EINVAL);
271  }
272  r->rv30 = 1;
273  if ((ret = ff_rv34_decode_init(avctx)) < 0)
274  return ret;
275 
276  r->max_rpr = avctx->extradata[1] & 7;
277  if(avctx->extradata_size < 2*r->max_rpr + 8){
278  av_log(avctx, AV_LOG_WARNING, "Insufficient extradata - need at least %d bytes, got %d\n",
279  2*r->max_rpr + 8, avctx->extradata_size);
280  }
281 
282  r->parse_slice_header = rv30_parse_slice_header;
283  r->decode_intra_types = rv30_decode_intra_types;
284  r->decode_mb_info = rv30_decode_mb_info;
285  r->loop_filter = rv30_loop_filter;
286  r->luma_dc_quant_i = rv30_luma_dc_quant;
287  r->luma_dc_quant_p = rv30_luma_dc_quant;
288  return 0;
289 }
290 
291  AVCodec ff_rv30_decoder = {
292  .name = "rv30",
293  .long_name = NULL_IF_CONFIG_SMALL("RealVideo 3.0"),
294  .type = AVMEDIA_TYPE_VIDEO,
295  .id = AV_CODEC_ID_RV30,
296  .priv_data_size = sizeof(RV34DecContext),
297  .init = rv30_decode_init,
298  .close = ff_rv34_decode_end,
299  .decode = ff_rv34_decode_frame,
300  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
301  AV_CODEC_CAP_FRAME_THREADS,
302  .flush = ff_mpeg_flush,
303  .pix_fmts = (const enum AVPixelFormat[]) {
304  AV_PIX_FMT_YUV420P,
305  AV_PIX_FMT_NONE
306  },
307  .init_thread_copy = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_init_thread_copy),
308  .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_update_thread_context),
309 };
rv30_luma_dc_quant
static const uint8_t rv30_luma_dc_quant[32]
DC quantizer mapping for RV30.
Definition: rv30data.h:33
RV34DecContext::orig_width
int orig_width
Definition: rv34.h:112
s
const char * s
Definition: avisynth_c.h:768
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
h
h
Definition: vp9dsp_template.c:2038
RV34DecContext::decode_intra_types
int(* decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst)
Definition: rv34.h:128
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:500
RV34DecContext::loop_filter
void(* loop_filter)(struct RV34DecContext *r, int row)
Definition: rv34.h:129
C
#define C
AVCodecContext::coded_width
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1705
IS_SEPARATE_DC
#define IS_SEPARATE_DC(a)
Definition: rv34.h:37
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:269
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
RV34_MB_B_FORWARD
B-frame macroblock, forward prediction.
Definition: rv34.h:47
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
RV34DecContext::s
MpegEncContext s
Definition: rv34.h:85
rv30_loop_filt_lim
static const uint8_t rv30_loop_filt_lim[32]
Loop filter limits are taken from this table.
Definition: rv30data.h:178
SliceInfo::height
int height
coded height
Definition: rv34.h:79
RV34_MB_B_DIRECT
Bidirectionally predicted B-frame macroblock, no motion vectors.
Definition: rv34.h:50
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
MAX_NEG_CROP
#define MAX_NEG_CROP
Definition: mathops.h:31
ff_rv30_decoder
AVCodec ff_rv30_decoder
Definition: rv30.c:291
mpegvideo.h
mpegvideo header.
rv30_decode_init
static av_cold int rv30_decode_init(AVCodecContext *avctx)
Initialize decoder.
Definition: rv30.c:260
rv34.h
RV30 and RV40 decoder common data declarations.
src
#define src
Definition: vp8dsp.c:254
SliceInfo::start
int start
Definition: rv34.h:77
AVCodec
AVCodec.
Definition: avcodec.h:3408
RV34DecContext::luma_dc_quant_p
const uint8_t * luma_dc_quant_p
luma subblock DC quantizer for interframes
Definition: rv34.h:91
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
rv30_decode_intra_types
static int rv30_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst)
Decode 4x4 intra types array.
Definition: rv30.c:86
AV_CODEC_CAP_DELAY
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:984
uint8_t
uint8_t
Definition: audio_convert.c:194
av_cold
#define av_cold
Definition: attributes.h:82
Y
#define Y
Definition: vf_boxblur.c:76
SliceInfo::width
int width
coded width
Definition: rv34.h:78
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1618
RV34DecContext::deblock_coefs
uint16_t * deblock_coefs
deblock coefficients for each macroblock
Definition: rv34.h:116
RV34DecContext::max_rpr
int max_rpr
Definition: rv34.h:105
rv30_decode_mb_info
static int rv30_decode_mb_info(RV34DecContext *r)
Decode macroblock information.
Definition: rv30.c:114
RV34_MB_SKIP
Skipped block.
Definition: rv34.h:49
A
#define A(x)
Definition: vp56_arith.h:28
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
cm
#define cm
Definition: dvbsubdec.c:37
U
#define U(x)
Definition: vp56_arith.h:37
SliceInfo::quant
int quant
quantizer used for this slice
Definition: rv34.h:75
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
RV34DecContext::parse_slice_header
int(* parse_slice_header)(struct RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
Definition: rv34.h:126
rv30_itype_from_context
static const uint8_t rv30_itype_from_context[900]
This table is used for retrieving the current intra type based on its neighbors and adjustment provid...
Definition: rv30data.h:63
AVERROR
#define AVERROR(e)
Definition: error.h:43
B
#define B
Definition: huffyuvdsp.h:32
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
r
const char * r
Definition: vf_curves.c:111
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3415
MpegEncContext::gb
GetBitContext gb
Definition: mpegvideo.h:448
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1015
ff_mpeg_flush
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo.c:2264
ONLY_IF_THREADS_ENABLED
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:225
RV34_MB_TYPE_INTRA16x16
Intra macroblock with DCs in a separate 4x4 block.
Definition: rv34.h:44
RV34DecContext::orig_height
int orig_height
Definition: rv34.h:112
w
uint8_t w
Definition: llviddspenc.c:38
MpegEncContext::current_picture_ptr
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:184
MpegEncContext::mb_width
int mb_width
Definition: mpegvideo.h:129
rv30_itype_code
static const uint8_t rv30_itype_code[9 *9 *2]
This table is used for storing the differences between the predicted and the real intra type...
Definition: rv30data.h:42
ff_rv34_decode_init_thread_copy
int ff_rv34_decode_init_thread_copy(AVCodecContext *avctx)
Definition: rv34.c:1534
SliceInfo
essential slice information
Definition: rv34.h:73
avcodec.h
Libavcodec external API header.
rv30_loop_filter
static void rv30_loop_filter(RV34DecContext *r, int row)
Definition: rv30.c:151
MpegEncContext::linesize
ptrdiff_t linesize
line size, in bytes, may be different from width
Definition: mpegvideo.h:134
AVCodecContext
main external API structure.
Definition: avcodec.h:1518
MpegEncContext::height
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:100
rv30_weak_loop_filter
static void rv30_weak_loop_filter(uint8_t *src, const int step, const int stride, const int lim)
Definition: rv30.c:136
AV_CODEC_ID_RV30
Definition: avcodec.h:286
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:1619
RV34_MB_P_8x8
P-frame macroblock, 8x8 motion compensation partitions.
Definition: rv34.h:46
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:321
skip_bits1
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:346
AVCodecContext::coded_height
int coded_height
Definition: avcodec.h:1705
Picture::f
struct AVFrame * f
Definition: mpegpicture.h:46
ff_rv34_decode_init
av_cold int ff_rv34_decode_init(AVCodecContext *avctx)
Initialize decoder.
Definition: rv34.c:1492
MpegEncContext::uvlinesize
ptrdiff_t uvlinesize
line size, for chroma in bytes, may be different from width
Definition: mpegvideo.h:135
ff_rv34_decode_frame
int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *got_picture_ptr, AVPacket *avpkt)
Definition: rv34.c:1643
RV34DecContext::intra_types_stride
int intra_types_stride
block types array stride
Definition: rv34.h:89
MpegEncContext::pict_type
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:212
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:266
RV34_MB_P_16x16
P-frame macroblock, one motion frame.
Definition: rv34.h:45
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:81
ff_rv34_decode_end
av_cold int ff_rv34_decode_end(AVCodecContext *avctx)
Definition: rv34.c:1849
Picture::qscale_table
int8_t * qscale_table
Definition: mpegpicture.h:50
MpegEncContext::avctx
struct AVCodecContext * avctx
Definition: mpegvideo.h:98
RV34DecContext::decode_mb_info
int(* decode_mb_info)(struct RV34DecContext *r)
Definition: rv34.h:127
stride
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
MpegEncContext::mb_stride
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
Definition: mpegvideo.h:130
RV34_MB_B_BACKWARD
B-frame macroblock, backward prediction.
Definition: rv34.h:48
ff_rv34_decode_update_thread_context
int ff_rv34_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: rv34.c:1562
AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:276
ff_crop_tab
#define ff_crop_tab
Definition: motionpixels_tablegen.c:26
ff_rv34_get_start_offset
int ff_rv34_get_start_offset(GetBitContext *gb, int mb_size)
Decode starting slice position.
Definition: rv34.c:330
IS_INTRA
#define IS_INTRA(x, y)
RV34DecContext
decoder context
Definition: rv34.h:84
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1545
diff
static av_always_inline int diff(const uint32_t a, const uint32_t b)
Definition: vf_palettegen.c:136
rv30_parse_slice_header
static int rv30_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
Definition: rv30.c:36
RV34DecContext::luma_dc_quant_i
const uint8_t * luma_dc_quant_i
luma subblock DC quantizer for intraframes
Definition: rv34.h:90
Picture::mb_type
uint32_t * mb_type
types and macros are defined in mpegutils.h
Definition: mpegpicture.h:56
SliceInfo::type
int type
slice type (intra, inter)
Definition: rv34.h:74
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
get_interleaved_ue_golomb
static unsigned get_interleaved_ue_golomb(GetBitContext *gb)
Definition: golomb.h:115
stride
#define stride
rv30data.h
miscellaneous RV30 tables
RV34DecContext::rv30
int rv30
indicates which RV variant is currently decoded
Definition: rv34.h:104
golomb.h
exp golomb vlc stuff
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
RV34_MB_TYPE_INTRA
Intra macroblock.
Definition: rv34.h:43
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:959
SliceInfo::pts
int pts
frame timestamp
Definition: rv34.h:80
RV34DecContext::cbp_chroma
uint8_t * cbp_chroma
CBP values for chroma subblocks.
Definition: rv34.h:115
Generated on Sun May 13 2018 02:03:54 for FFmpeg by   doxygen 1.8.6

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