Libav
dirac.c
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1 /*
2  * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
3  * Copyright (C) 2009 David Conrad
4  *
5  * This file is part of Libav.
6  *
7  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
28 #include "libavutil/imgutils.h"
29 #include "dirac.h"
30 #include "avcodec.h"
31 #include "golomb.h"
32 #include "internal.h"
33 #include "mpeg12data.h"
34 
35 // defaults for source parameters
37  { 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 },
38  { 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 },
39  { 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 },
40  { 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 },
41  { 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 },
42  { 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 },
43  { 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 },
44  { 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 },
45  { 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 },
46 
47  { 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 },
48  { 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 },
49  { 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 },
50  { 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 },
51  { 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 },
52  { 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 },
53  { 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 },
54  { 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 },
55 
56  { 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
57  { 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
58  { 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
59  { 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
60 };
61 
62 /* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */
64  {1, 1},
65  {10, 11},
66  {12, 11},
67  {40, 33},
68  {16, 11},
69  {4, 3},
70 };
71 
72 /* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate.
73  * Table 10.3 Available preset frame rate values
74  */
75 static const AVRational dirac_frame_rate[] = {
76  {15000, 1001},
77  {25, 2},
78 };
79 
80 /* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal
81  * range presets */
82 static const struct {
85 } pixel_range_presets[] = {
86  {8, AVCOL_RANGE_JPEG},
87  {8, AVCOL_RANGE_MPEG},
88  {10, AVCOL_RANGE_MPEG},
89  {12, AVCOL_RANGE_MPEG},
90 };
91 
92 static const enum AVColorPrimaries dirac_primaries[] = {
96 };
97 
98 static const struct {
102 } dirac_color_presets[] = {
108 };
109 
110 /* [DIRAC_STD] Table 10.2 Supported chroma sampling formats + luma Offset */
111 static const enum AVPixelFormat dirac_pix_fmt[2][3] = {
114 };
115 
116 /* [DIRAC_STD] 10.3 Parse Source Parameters.
117  * source_parameters(base_video_format) */
119  dirac_source_params *source)
120 {
121  AVRational frame_rate = {0,0};
122  unsigned luma_depth = 8, luma_offset = 16;
123  int idx;
124 
125  /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
126  /* [DIRAC_STD] custom_dimensions_flag */
127  if (get_bits1(gb)) {
128  source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */
129  source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */
130  }
131 
132  /* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
133  * chroma_sampling_format(video_params) */
134  /* [DIRAC_STD] custom_chroma_format_flag */
135  if (get_bits1(gb))
136  /* [DIRAC_STD] CHROMA_FORMAT_INDEX */
137  source->chroma_format = svq3_get_ue_golomb(gb);
138  if (source->chroma_format > 2) {
139  av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
140  source->chroma_format);
141  return AVERROR_INVALIDDATA;
142  }
143 
144  /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
145  /* [DIRAC_STD] custom_scan_format_flag */
146  if (get_bits1(gb))
147  /* [DIRAC_STD] SOURCE_SAMPLING */
148  source->interlaced = svq3_get_ue_golomb(gb);
149  if (source->interlaced > 1)
150  return AVERROR_INVALIDDATA;
151 
152  /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */
153  if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */
154  source->frame_rate_index = svq3_get_ue_golomb(gb);
155 
156  if (source->frame_rate_index > 10)
157  return AVERROR_INVALIDDATA;
158 
159  if (!source->frame_rate_index) {
160  /* [DIRAC_STD] FRAME_RATE_NUMER */
161  frame_rate.num = svq3_get_ue_golomb(gb);
162  /* [DIRAC_STD] FRAME_RATE_DENOM */
163  frame_rate.den = svq3_get_ue_golomb(gb);
164  }
165  }
166  /* [DIRAC_STD] preset_frame_rate(video_params, index) */
167  if (source->frame_rate_index > 0) {
168  if (source->frame_rate_index <= 8)
169  frame_rate = ff_mpeg12_frame_rate_tab[source->frame_rate_index];
170  else
171  /* [DIRAC_STD] Table 10.3 values 9-10 */
172  frame_rate = dirac_frame_rate[source->frame_rate_index-9];
173  }
174  av_reduce(&avctx->time_base.num, &avctx->time_base.den,
175  frame_rate.den, frame_rate.num, 1<<30);
176 
177  /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio.
178  * pixel_aspect_ratio(video_params) */
179  if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */
180  /* [DIRAC_STD] index */
182 
183  if (source->aspect_ratio_index > 6)
184  return AVERROR_INVALIDDATA;
185 
186  if (!source->aspect_ratio_index) {
189  }
190  }
191  /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel
192  * aspect ratio values */
193  if (source->aspect_ratio_index > 0)
194  avctx->sample_aspect_ratio =
195  dirac_preset_aspect_ratios[source->aspect_ratio_index-1];
196 
197  /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */
198  if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */
199  /* [DIRAC_STD] CLEAN_WIDTH */
200  source->clean_width = svq3_get_ue_golomb(gb);
201  /* [DIRAC_STD] CLEAN_HEIGHT */
202  source->clean_height = svq3_get_ue_golomb(gb);
203  /* [DIRAC_STD] CLEAN_LEFT_OFFSET */
205  /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */
207  }
208 
209  /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params)
210  * WARNING: Some adaptation seems to be done using the
211  * AVCOL_RANGE_MPEG/JPEG values */
212  if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */
213  /* [DIRAC_STD] index */
215 
216  if (source->pixel_range_index > 4)
217  return AVERROR_INVALIDDATA;
218 
219  // This assumes either fullrange or MPEG levels only
220  if (!source->pixel_range_index) {
221  luma_offset = svq3_get_ue_golomb(gb);
222  luma_depth = av_log2(svq3_get_ue_golomb(gb))+1;
223  svq3_get_ue_golomb(gb); /* chroma offset */
224  svq3_get_ue_golomb(gb); /* chroma excursion */
225  avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
226  }
227  }
228  /* [DIRAC_STD] Table 10.5
229  * Available signal range presets <--> pixel_range_presets */
230  if (source->pixel_range_index > 0) {
231  idx = source->pixel_range_index-1;
232  luma_depth = pixel_range_presets[idx].bitdepth;
233  avctx->color_range = pixel_range_presets[idx].color_range;
234  }
235 
236  if (luma_depth > 8)
237  av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8");
238 
239  avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format];
240 
241  /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
242  if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */
243  /* [DIRAC_STD] index */
244  idx = source->color_spec_index = svq3_get_ue_golomb(gb);
245 
246  if (source->color_spec_index > 4)
247  return AVERROR_INVALIDDATA;
248 
249  avctx->color_primaries = dirac_color_presets[idx].color_primaries;
250  avctx->colorspace = dirac_color_presets[idx].colorspace;
251  avctx->color_trc = dirac_color_presets[idx].color_trc;
252 
253  if (!source->color_spec_index) {
254  /* [DIRAC_STD] 10.3.9.1 Colour primaries */
255  if (get_bits1(gb)) {
256  idx = svq3_get_ue_golomb(gb);
257  if (idx < 3)
258  avctx->color_primaries = dirac_primaries[idx];
259  }
260  /* [DIRAC_STD] 10.3.9.2 Colour matrix */
261  if (get_bits1(gb)) {
262  idx = svq3_get_ue_golomb(gb);
263  if (!idx)
264  avctx->colorspace = AVCOL_SPC_BT709;
265  else if (idx == 1)
266  avctx->colorspace = AVCOL_SPC_BT470BG;
267  }
268  /* [DIRAC_STD] 10.3.9.3 Transfer function */
269  if (get_bits1(gb) && !svq3_get_ue_golomb(gb))
270  avctx->color_trc = AVCOL_TRC_BT709;
271  }
272  } else {
273  idx = source->color_spec_index;
274  avctx->color_primaries = dirac_color_presets[idx].color_primaries;
275  avctx->colorspace = dirac_color_presets[idx].colorspace;
276  avctx->color_trc = dirac_color_presets[idx].color_trc;
277  }
278 
279  return 0;
280 }
281 
282 /* [DIRAC_STD] 10. Sequence Header. sequence_header() */
284  dirac_source_params *source)
285 {
286  unsigned version_major;
287  unsigned video_format, picture_coding_mode;
288  int ret;
289 
290  /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
291  version_major = svq3_get_ue_golomb(gb);
292  svq3_get_ue_golomb(gb); /* version_minor */
293  avctx->profile = svq3_get_ue_golomb(gb);
294  avctx->level = svq3_get_ue_golomb(gb);
295  /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
296  * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
297  video_format = svq3_get_ue_golomb(gb);
298 
299  if (version_major < 2)
300  av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n");
301  else if (version_major > 2)
302  av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
303 
304  if (video_format > 20)
305  return AVERROR_INVALIDDATA;
306 
307  // Fill in defaults for the source parameters.
308  *source = dirac_source_parameters_defaults[video_format];
309 
310  /* [DIRAC_STD] 10.3 Source Parameters
311  * Override the defaults. */
312  if (ret = parse_source_parameters(avctx, gb, source))
313  return ret;
314 
315  ret = ff_set_dimensions(avctx, source->width, source->height);
316  if (ret < 0)
317  return ret;
318 
319  /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
320  * currently only used to signal field coding */
321  picture_coding_mode = svq3_get_ue_golomb(gb);
322  if (picture_coding_mode != 0) {
323  av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d",
324  picture_coding_mode);
325  return AVERROR_INVALIDDATA;
326  }
327  return 0;
328 }
unsigned height
Definition: dirac.h:36
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:70
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:129
uint16_t clean_right_offset
Definition: dirac.h:48
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:144
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:1754
int num
numerator
Definition: rational.h:44
uint8_t frame_rate_index
index into dirac_frame_rate[]
Definition: dirac.h:42
static unsigned svq3_get_ue_golomb(GetBitContext *gb)
Definition: golomb.h:111
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1422
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1247
AVColorRange
Definition: avcodec.h:593
int profile
profile
Definition: avcodec.h:2596
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1173
enum AVColorTransferCharacteristic color_trc
Definition: dirac.c:101
static const dirac_source_params dirac_source_parameters_defaults[]
Definition: dirac.c:36
uint8_t
Interface to Dirac Decoder/Encoder.
static const struct @14 dirac_color_presets[]
uint8_t color_spec_index
index into dirac_color_spec_presets[]
Definition: dirac.h:51
enum AVColorRange color_range
Definition: dirac.c:84
uint16_t clean_width
Definition: dirac.h:45
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV422P and setting color_...
Definition: pixfmt.h:78
static const struct @13 pixel_range_presets[]
static enum AVPixelFormat dirac_pix_fmt[2][3]
Definition: dirac.c:111
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
enum AVColorPrimaries color_primaries
Definition: dirac.c:99
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:148
uint16_t clean_height
Definition: dirac.h:46
uint8_t chroma_format
0: 444 1: 422 2: 420
Definition: dirac.h:37
int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb, dirac_source_params *source)
Definition: dirac.c:283
uint8_t aspect_ratio_index
index into dirac_aspect_ratio[]
Definition: dirac.h:43
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:69
the normal 2^n-1 "JPEG" YUV ranges
Definition: avcodec.h:596
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
also ITU-R BT1361
Definition: avcodec.h:562
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: avcodec.h:595
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV420P and setting color_...
Definition: pixfmt.h:77
uint8_t interlaced
Definition: dirac.h:39
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:1733
int level
level
Definition: avcodec.h:2679
uint8_t pixel_range_index
index into dirac_pixel_range_presets[]
Definition: dirac.h:50
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: avcodec.h:581
Libavcodec external API header.
static const AVRational dirac_frame_rate[]
Definition: dirac.c:75
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
Definition: avcodec.h:553
main external API structure.
Definition: avcodec.h:1054
AVColorTransferCharacteristic
Definition: avcodec.h:561
MPEG1/2 tables.
static enum AVColorPrimaries dirac_primaries[]
Definition: dirac.c:92
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:271
AVColorPrimaries
Definition: avcodec.h:549
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:1747
rational number numerator/denominator
Definition: rational.h:43
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:1740
static const AVRational dirac_preset_aspect_ratios[]
Definition: dirac.c:63
static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb, dirac_source_params *source)
Definition: dirac.c:118
also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
Definition: avcodec.h:554
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
common internal api header.
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV444P and setting color_...
Definition: pixfmt.h:79
int den
denominator
Definition: rational.h:45
uint16_t clean_left_offset
Definition: dirac.h:47
#define av_log2
Definition: intmath.h:85
also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
Definition: avcodec.h:550
AVColorSpace
Definition: avcodec.h:579
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601 ...
Definition: avcodec.h:584
enum AVColorSpace colorspace
Definition: dirac.c:100
uint8_t bitdepth
Definition: dirac.c:83
exp golomb vlc stuff
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
const AVRational ff_mpeg12_frame_rate_tab[16]
Definition: mpeg12data.c:308
unsigned width
Definition: dirac.h:35