dirac.c
15.4 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
/*
* Copyright (C) 2007 Marco Gerards <marco@gnu.org>
* Copyright (C) 2009 David Conrad
* Copyright (C) 2011 Jordi Ortiz
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Dirac Decoder
* @author Marco Gerards <marco@gnu.org>, David Conrad, Jordi Ortiz <nenjordi@gmail.com>
*/
#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "dirac.h"
#include "golomb.h"
#include "internal.h"
#include "mpeg12data.h"
#if CONFIG_DIRAC_PARSE
typedef struct dirac_source_params {
unsigned width;
unsigned height;
uint8_t chroma_format; ///< 0: 444 1: 422 2: 420
uint8_t interlaced;
uint8_t top_field_first;
uint8_t frame_rate_index; ///< index into dirac_frame_rate[]
uint8_t aspect_ratio_index; ///< index into dirac_aspect_ratio[]
uint16_t clean_width;
uint16_t clean_height;
uint16_t clean_left_offset;
uint16_t clean_right_offset;
uint8_t pixel_range_index; ///< index into dirac_pixel_range_presets[]
uint8_t color_spec_index; ///< index into dirac_color_spec_presets[]
} dirac_source_params;
/* defaults for source parameters */
static const dirac_source_params dirac_source_parameters_defaults[] = {
{ 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 },
{ 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 },
{ 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 },
{ 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 },
{ 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 },
{ 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 },
{ 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 },
{ 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 },
{ 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 },
{ 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 },
{ 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 },
{ 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 },
{ 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 },
{ 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 },
{ 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 },
{ 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 },
{ 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 },
{ 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
{ 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
{ 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
{ 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
};
/* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */
static const AVRational dirac_preset_aspect_ratios[] = {
{ 1, 1 },
{ 10, 11 },
{ 12, 11 },
{ 40, 33 },
{ 16, 11 },
{ 4, 3 },
};
/* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate.
* Table 10.3 Available preset frame rate values
*/
static const AVRational dirac_frame_rate[] = {
{ 15000, 1001 },
{ 25, 2 },
};
/* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal
* range presets */
static const struct {
uint8_t bitdepth;
enum AVColorRange color_range;
} pixel_range_presets[] = {
{ 8, AVCOL_RANGE_JPEG },
{ 8, AVCOL_RANGE_MPEG },
{ 10, AVCOL_RANGE_MPEG },
{ 12, AVCOL_RANGE_MPEG },
};
static const enum AVColorPrimaries dirac_primaries[] = {
AVCOL_PRI_BT709,
AVCOL_PRI_SMPTE170M,
AVCOL_PRI_BT470BG,
};
static const struct {
enum AVColorPrimaries color_primaries;
enum AVColorSpace colorspace;
enum AVColorTransferCharacteristic color_trc;
} dirac_color_presets[] = {
{ AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
{ AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
{ AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
{ AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
{ AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ },
};
/* [DIRAC_STD] Table 10.2 Supported chroma sampling formats */
static const enum AVPixelFormat dirac_pix_fmt[][3] = {
{AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12},
{AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12},
{AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12},
};
/* [DIRAC_STD] 10.3 Parse Source Parameters.
* source_parameters(base_video_format) */
static int parse_source_parameters(AVDiracSeqHeader *dsh, GetBitContext *gb,
void *log_ctx)
{
AVRational frame_rate = { 0, 0 };
unsigned luma_depth = 8, luma_offset = 16;
int idx;
int chroma_x_shift, chroma_y_shift;
int ret;
/* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
/* [DIRAC_STD] custom_dimensions_flag */
if (get_bits1(gb)) {
dsh->width = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */
dsh->height = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */
}
/* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
* chroma_sampling_format(video_params) */
/* [DIRAC_STD] custom_chroma_format_flag */
if (get_bits1(gb))
/* [DIRAC_STD] CHROMA_FORMAT_INDEX */
dsh->chroma_format = get_interleaved_ue_golomb(gb);
if (dsh->chroma_format > 2U) {
if (log_ctx)
av_log(log_ctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
dsh->chroma_format);
return AVERROR_INVALIDDATA;
}
/* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
/* [DIRAC_STD] custom_scan_format_flag */
if (get_bits1(gb))
/* [DIRAC_STD] SOURCE_SAMPLING */
dsh->interlaced = get_interleaved_ue_golomb(gb);
if (dsh->interlaced > 1U)
return AVERROR_INVALIDDATA;
/* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */
if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */
dsh->frame_rate_index = get_interleaved_ue_golomb(gb);
if (dsh->frame_rate_index > 10U)
return AVERROR_INVALIDDATA;
if (!dsh->frame_rate_index) {
/* [DIRAC_STD] FRAME_RATE_NUMER */
frame_rate.num = get_interleaved_ue_golomb(gb);
/* [DIRAC_STD] FRAME_RATE_DENOM */
frame_rate.den = get_interleaved_ue_golomb(gb);
}
}
/* [DIRAC_STD] preset_frame_rate(video_params, index) */
if (dsh->frame_rate_index > 0) {
if (dsh->frame_rate_index <= 8)
frame_rate = ff_mpeg12_frame_rate_tab[dsh->frame_rate_index];
else
/* [DIRAC_STD] Table 10.3 values 9-10 */
frame_rate = dirac_frame_rate[dsh->frame_rate_index - 9];
}
dsh->framerate = frame_rate;
/* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio.
* pixel_aspect_ratio(video_params) */
if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */
/* [DIRAC_STD] index */
dsh->aspect_ratio_index = get_interleaved_ue_golomb(gb);
if (dsh->aspect_ratio_index > 6U)
return AVERROR_INVALIDDATA;
if (!dsh->aspect_ratio_index) {
dsh->sample_aspect_ratio.num = get_interleaved_ue_golomb(gb);
dsh->sample_aspect_ratio.den = get_interleaved_ue_golomb(gb);
}
}
/* [DIRAC_STD] Take value from Table 10.4 Available preset pixel
* aspect ratio values */
if (dsh->aspect_ratio_index > 0)
dsh->sample_aspect_ratio =
dirac_preset_aspect_ratios[dsh->aspect_ratio_index - 1];
/* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */
if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */
/* [DIRAC_STD] CLEAN_WIDTH */
dsh->clean_width = get_interleaved_ue_golomb(gb);
/* [DIRAC_STD] CLEAN_HEIGHT */
dsh->clean_height = get_interleaved_ue_golomb(gb);
/* [DIRAC_STD] CLEAN_LEFT_OFFSET */
dsh->clean_left_offset = get_interleaved_ue_golomb(gb);
/* [DIRAC_STD] CLEAN_RIGHT_OFFSET */
dsh->clean_right_offset = get_interleaved_ue_golomb(gb);
}
/* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params)
* WARNING: Some adaptation seems to be done using the
* AVCOL_RANGE_MPEG/JPEG values */
if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */
/* [DIRAC_STD] index */
dsh->pixel_range_index = get_interleaved_ue_golomb(gb);
if (dsh->pixel_range_index > 4U)
return AVERROR_INVALIDDATA;
/* This assumes either fullrange or MPEG levels only */
if (!dsh->pixel_range_index) {
luma_offset = get_interleaved_ue_golomb(gb);
luma_depth = av_log2(get_interleaved_ue_golomb(gb)) + 1;
get_interleaved_ue_golomb(gb); /* chroma offset */
get_interleaved_ue_golomb(gb); /* chroma excursion */
dsh->color_range = luma_offset ? AVCOL_RANGE_MPEG
: AVCOL_RANGE_JPEG;
}
}
/* [DIRAC_STD] Table 10.5
* Available signal range presets <--> pixel_range_presets */
if (dsh->pixel_range_index > 0) {
idx = dsh->pixel_range_index - 1;
luma_depth = pixel_range_presets[idx].bitdepth;
dsh->color_range = pixel_range_presets[idx].color_range;
}
dsh->bit_depth = luma_depth;
/* Full range 8 bts uses the same pix_fmts as limited range 8 bits */
dsh->pixel_range_index += dsh->pixel_range_index == 1;
if (dsh->pixel_range_index < 2U)
return AVERROR_INVALIDDATA;
dsh->pix_fmt = dirac_pix_fmt[dsh->chroma_format][dsh->pixel_range_index-2];
ret = av_pix_fmt_get_chroma_sub_sample(dsh->pix_fmt, &chroma_x_shift, &chroma_y_shift);
if (ret)
return ret;
if ((dsh->width % (1<<chroma_x_shift)) || (dsh->height % (1<<chroma_y_shift))) {
if (log_ctx)
av_log(log_ctx, AV_LOG_ERROR, "Dimensions must be an integer multiple of the chroma subsampling\n");
return AVERROR_INVALIDDATA;
}
/* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */
/* [DIRAC_STD] index */
idx = dsh->color_spec_index = get_interleaved_ue_golomb(gb);
if (dsh->color_spec_index > 4U)
return AVERROR_INVALIDDATA;
dsh->color_primaries = dirac_color_presets[idx].color_primaries;
dsh->colorspace = dirac_color_presets[idx].colorspace;
dsh->color_trc = dirac_color_presets[idx].color_trc;
if (!dsh->color_spec_index) {
/* [DIRAC_STD] 10.3.9.1 Colour primaries */
if (get_bits1(gb)) {
idx = get_interleaved_ue_golomb(gb);
if (idx < 3U)
dsh->color_primaries = dirac_primaries[idx];
}
/* [DIRAC_STD] 10.3.9.2 Colour matrix */
if (get_bits1(gb)) {
idx = get_interleaved_ue_golomb(gb);
if (!idx)
dsh->colorspace = AVCOL_SPC_BT709;
else if (idx == 1)
dsh->colorspace = AVCOL_SPC_BT470BG;
}
/* [DIRAC_STD] 10.3.9.3 Transfer function */
if (get_bits1(gb) && !get_interleaved_ue_golomb(gb))
dsh->color_trc = AVCOL_TRC_BT709;
}
} else {
idx = dsh->color_spec_index;
dsh->color_primaries = dirac_color_presets[idx].color_primaries;
dsh->colorspace = dirac_color_presets[idx].colorspace;
dsh->color_trc = dirac_color_presets[idx].color_trc;
}
return 0;
}
/* [DIRAC_STD] 10. Sequence Header. sequence_header() */
int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh,
const uint8_t *buf, size_t buf_size,
void *log_ctx)
{
AVDiracSeqHeader *dsh;
GetBitContext gb;
unsigned video_format, picture_coding_mode;
int ret;
dsh = av_mallocz(sizeof(*dsh));
if (!dsh)
return AVERROR(ENOMEM);
ret = init_get_bits8(&gb, buf, buf_size);
if (ret < 0)
goto fail;
/* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
dsh->version.major = get_interleaved_ue_golomb(&gb);
dsh->version.minor = get_interleaved_ue_golomb(&gb);
dsh->profile = get_interleaved_ue_golomb(&gb);
dsh->level = get_interleaved_ue_golomb(&gb);
/* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
* 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
video_format = get_interleaved_ue_golomb(&gb);
if (dsh->version.major < 2 && log_ctx)
av_log(log_ctx, AV_LOG_WARNING, "Stream is old and may not work\n");
else if (dsh->version.major > 2 && log_ctx)
av_log(log_ctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
if (video_format > 20U) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
/* Fill in defaults for the source parameters. */
dsh->width = dirac_source_parameters_defaults[video_format].width;
dsh->height = dirac_source_parameters_defaults[video_format].height;
dsh->chroma_format = dirac_source_parameters_defaults[video_format].chroma_format;
dsh->interlaced = dirac_source_parameters_defaults[video_format].interlaced;
dsh->top_field_first = dirac_source_parameters_defaults[video_format].top_field_first;
dsh->frame_rate_index = dirac_source_parameters_defaults[video_format].frame_rate_index;
dsh->aspect_ratio_index = dirac_source_parameters_defaults[video_format].aspect_ratio_index;
dsh->clean_width = dirac_source_parameters_defaults[video_format].clean_width;
dsh->clean_height = dirac_source_parameters_defaults[video_format].clean_height;
dsh->clean_left_offset = dirac_source_parameters_defaults[video_format].clean_left_offset;
dsh->clean_right_offset = dirac_source_parameters_defaults[video_format].clean_right_offset;
dsh->pixel_range_index = dirac_source_parameters_defaults[video_format].pixel_range_index;
dsh->color_spec_index = dirac_source_parameters_defaults[video_format].color_spec_index;
/* [DIRAC_STD] 10.3 Source Parameters
* Override the defaults. */
ret = parse_source_parameters(dsh, &gb, log_ctx);
if (ret < 0)
goto fail;
/* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
* currently only used to signal field coding */
picture_coding_mode = get_interleaved_ue_golomb(&gb);
if (picture_coding_mode != 0) {
if (log_ctx) {
av_log(log_ctx, AV_LOG_ERROR, "Unsupported picture coding mode %d",
picture_coding_mode);
}
ret = AVERROR_INVALIDDATA;
goto fail;
}
*pdsh = dsh;
return 0;
fail:
av_freep(&dsh);
*pdsh = NULL;
return ret;
}
#else
int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh,
const uint8_t *buf, size_t buf_size,
void *log_ctx)
{
return AVERROR(ENOSYS);
}
#endif