1 /*
2 * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
3 * Copyright (C) 2009 David Conrad
4 * Copyright (C) 2011 Jordi Ortiz
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file
25 * Dirac Decoder
26 * @author Marco Gerards <marco@gnu.org>, David Conrad, Jordi Ortiz <nenjordi@gmail.com>
27 */
28
29 #include "libavutil/imgutils.h"
30
31 #include "avcodec.h"
32 #include "dirac.h"
33 #include "golomb.h"
34 #include "internal.h"
35 #include "mpeg12data.h"
36
37 #if CONFIG_DIRAC_PARSE
38
39 typedef struct dirac_source_params {
40 unsigned width;
41 unsigned height;
42 uint8_t chroma_format; ///< 0: 444 1: 422 2: 420
43
44 uint8_t interlaced;
45 uint8_t top_field_first;
46
47 uint8_t frame_rate_index; ///< index into dirac_frame_rate[]
48 uint8_t aspect_ratio_index; ///< index into dirac_aspect_ratio[]
49
50 uint16_t clean_width;
51 uint16_t clean_height;
52 uint16_t clean_left_offset;
53 uint16_t clean_right_offset;
54
55 uint8_t pixel_range_index; ///< index into dirac_pixel_range_presets[]
56 uint8_t color_spec_index; ///< index into dirac_color_spec_presets[]
57 } dirac_source_params;
58
59 /* defaults for source parameters */
60 static const dirac_source_params dirac_source_parameters_defaults[] = {
61 { 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 },
62 { 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 },
63 { 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 },
64 { 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 },
65 { 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 },
66 { 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 },
67 { 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 },
68 { 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 },
69 { 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 },
70
71 { 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 },
72 { 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 },
73 { 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 },
74 { 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 },
75 { 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 },
76 { 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 },
77 { 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 },
78 { 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 },
79
80 { 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
81 { 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
82 { 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
83 { 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
84 };
85
86 /* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */
87 static const AVRational dirac_preset_aspect_ratios[] = {
88 { 1, 1 },
89 { 10, 11 },
90 { 12, 11 },
91 { 40, 33 },
92 { 16, 11 },
93 { 4, 3 },
94 };
95
96 /* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate.
97 * Table 10.3 Available preset frame rate values
98 */
99 static const AVRational dirac_frame_rate[] = {
100 { 15000, 1001 },
101 { 25, 2 },
102 };
103
104 /* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal
105 * range presets */
106 static const struct {
107 uint8_t bitdepth;
108 enum AVColorRange color_range;
109 } pixel_range_presets[] = {
110 { 8, AVCOL_RANGE_JPEG },
111 { 8, AVCOL_RANGE_MPEG },
112 { 10, AVCOL_RANGE_MPEG },
113 { 12, AVCOL_RANGE_MPEG },
114 };
115
116 static const enum AVColorPrimaries dirac_primaries[] = {
117 AVCOL_PRI_BT709,
118 AVCOL_PRI_SMPTE170M,
119 AVCOL_PRI_BT470BG,
120 };
121
122 static const struct {
123 enum AVColorPrimaries color_primaries;
124 enum AVColorSpace colorspace;
125 enum AVColorTransferCharacteristic color_trc;
126 } dirac_color_presets[] = {
127 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
128 { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
129 { AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
130 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
131 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ },
132 };
133
134 /* [DIRAC_STD] Table 10.2 Supported chroma sampling formats */
135 static const enum AVPixelFormat dirac_pix_fmt[][3] = {
136 {AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12},
137 {AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12},
138 {AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12},
139 };
140
141 /* [DIRAC_STD] 10.3 Parse Source Parameters.
142 * source_parameters(base_video_format) */
parse_source_parameters(AVDiracSeqHeader * dsh,GetBitContext * gb,void * log_ctx)143 static int parse_source_parameters(AVDiracSeqHeader *dsh, GetBitContext *gb,
144 void *log_ctx)
145 {
146 AVRational frame_rate = { 0, 0 };
147 unsigned luma_depth = 8, luma_offset = 16;
148 int idx;
149 int chroma_x_shift, chroma_y_shift;
150 int ret;
151
152 /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
153 /* [DIRAC_STD] custom_dimensions_flag */
154 if (get_bits1(gb)) {
155 dsh->width = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */
156 dsh->height = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */
157 }
158
159 /* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
160 * chroma_sampling_format(video_params) */
161 /* [DIRAC_STD] custom_chroma_format_flag */
162 if (get_bits1(gb))
163 /* [DIRAC_STD] CHROMA_FORMAT_INDEX */
164 dsh->chroma_format = get_interleaved_ue_golomb(gb);
165 if (dsh->chroma_format > 2U) {
166 if (log_ctx)
167 av_log(log_ctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
168 dsh->chroma_format);
169 return AVERROR_INVALIDDATA;
170 }
171
172 /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
173 /* [DIRAC_STD] custom_scan_format_flag */
174 if (get_bits1(gb))
175 /* [DIRAC_STD] SOURCE_SAMPLING */
176 dsh->interlaced = get_interleaved_ue_golomb(gb);
177 if (dsh->interlaced > 1U)
178 return AVERROR_INVALIDDATA;
179
180 /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */
181 if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */
182 dsh->frame_rate_index = get_interleaved_ue_golomb(gb);
183
184 if (dsh->frame_rate_index > 10U)
185 return AVERROR_INVALIDDATA;
186
187 if (!dsh->frame_rate_index) {
188 /* [DIRAC_STD] FRAME_RATE_NUMER */
189 frame_rate.num = get_interleaved_ue_golomb(gb);
190 /* [DIRAC_STD] FRAME_RATE_DENOM */
191 frame_rate.den = get_interleaved_ue_golomb(gb);
192 }
193 }
194 /* [DIRAC_STD] preset_frame_rate(video_params, index) */
195 if (dsh->frame_rate_index > 0) {
196 if (dsh->frame_rate_index <= 8)
197 frame_rate = ff_mpeg12_frame_rate_tab[dsh->frame_rate_index];
198 else
199 /* [DIRAC_STD] Table 10.3 values 9-10 */
200 frame_rate = dirac_frame_rate[dsh->frame_rate_index - 9];
201 }
202 dsh->framerate = frame_rate;
203
204 /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio.
205 * pixel_aspect_ratio(video_params) */
206 if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */
207 /* [DIRAC_STD] index */
208 dsh->aspect_ratio_index = get_interleaved_ue_golomb(gb);
209
210 if (dsh->aspect_ratio_index > 6U)
211 return AVERROR_INVALIDDATA;
212
213 if (!dsh->aspect_ratio_index) {
214 dsh->sample_aspect_ratio.num = get_interleaved_ue_golomb(gb);
215 dsh->sample_aspect_ratio.den = get_interleaved_ue_golomb(gb);
216 }
217 }
218 /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel
219 * aspect ratio values */
220 if (dsh->aspect_ratio_index > 0)
221 dsh->sample_aspect_ratio =
222 dirac_preset_aspect_ratios[dsh->aspect_ratio_index - 1];
223
224 /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */
225 if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */
226 /* [DIRAC_STD] CLEAN_WIDTH */
227 dsh->clean_width = get_interleaved_ue_golomb(gb);
228 /* [DIRAC_STD] CLEAN_HEIGHT */
229 dsh->clean_height = get_interleaved_ue_golomb(gb);
230 /* [DIRAC_STD] CLEAN_LEFT_OFFSET */
231 dsh->clean_left_offset = get_interleaved_ue_golomb(gb);
232 /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */
233 dsh->clean_right_offset = get_interleaved_ue_golomb(gb);
234 }
235
236 /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params)
237 * WARNING: Some adaptation seems to be done using the
238 * AVCOL_RANGE_MPEG/JPEG values */
239 if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */
240 /* [DIRAC_STD] index */
241 dsh->pixel_range_index = get_interleaved_ue_golomb(gb);
242
243 if (dsh->pixel_range_index > 4U)
244 return AVERROR_INVALIDDATA;
245
246 /* This assumes either fullrange or MPEG levels only */
247 if (!dsh->pixel_range_index) {
248 luma_offset = get_interleaved_ue_golomb(gb);
249 luma_depth = av_log2(get_interleaved_ue_golomb(gb)) + 1;
250 get_interleaved_ue_golomb(gb); /* chroma offset */
251 get_interleaved_ue_golomb(gb); /* chroma excursion */
252 dsh->color_range = luma_offset ? AVCOL_RANGE_MPEG
253 : AVCOL_RANGE_JPEG;
254 }
255 }
256 /* [DIRAC_STD] Table 10.5
257 * Available signal range presets <--> pixel_range_presets */
258 if (dsh->pixel_range_index > 0) {
259 idx = dsh->pixel_range_index - 1;
260 luma_depth = pixel_range_presets[idx].bitdepth;
261 dsh->color_range = pixel_range_presets[idx].color_range;
262 }
263
264 dsh->bit_depth = luma_depth;
265
266 /* Full range 8 bts uses the same pix_fmts as limited range 8 bits */
267 dsh->pixel_range_index += dsh->pixel_range_index == 1;
268
269 if (dsh->pixel_range_index < 2U)
270 return AVERROR_INVALIDDATA;
271
272 dsh->pix_fmt = dirac_pix_fmt[dsh->chroma_format][dsh->pixel_range_index-2];
273 ret = av_pix_fmt_get_chroma_sub_sample(dsh->pix_fmt, &chroma_x_shift, &chroma_y_shift);
274 if (ret)
275 return ret;
276
277 if ((dsh->width % (1<<chroma_x_shift)) || (dsh->height % (1<<chroma_y_shift))) {
278 if (log_ctx)
279 av_log(log_ctx, AV_LOG_ERROR, "Dimensions must be an integer multiple of the chroma subsampling\n");
280 return AVERROR_INVALIDDATA;
281 }
282
283 /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
284 if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */
285 /* [DIRAC_STD] index */
286 idx = dsh->color_spec_index = get_interleaved_ue_golomb(gb);
287
288 if (dsh->color_spec_index > 4U)
289 return AVERROR_INVALIDDATA;
290
291 dsh->color_primaries = dirac_color_presets[idx].color_primaries;
292 dsh->colorspace = dirac_color_presets[idx].colorspace;
293 dsh->color_trc = dirac_color_presets[idx].color_trc;
294
295 if (!dsh->color_spec_index) {
296 /* [DIRAC_STD] 10.3.9.1 Colour primaries */
297 if (get_bits1(gb)) {
298 idx = get_interleaved_ue_golomb(gb);
299 if (idx < 3U)
300 dsh->color_primaries = dirac_primaries[idx];
301 }
302 /* [DIRAC_STD] 10.3.9.2 Colour matrix */
303 if (get_bits1(gb)) {
304 idx = get_interleaved_ue_golomb(gb);
305 if (!idx)
306 dsh->colorspace = AVCOL_SPC_BT709;
307 else if (idx == 1)
308 dsh->colorspace = AVCOL_SPC_BT470BG;
309 }
310 /* [DIRAC_STD] 10.3.9.3 Transfer function */
311 if (get_bits1(gb) && !get_interleaved_ue_golomb(gb))
312 dsh->color_trc = AVCOL_TRC_BT709;
313 }
314 } else {
315 idx = dsh->color_spec_index;
316 dsh->color_primaries = dirac_color_presets[idx].color_primaries;
317 dsh->colorspace = dirac_color_presets[idx].colorspace;
318 dsh->color_trc = dirac_color_presets[idx].color_trc;
319 }
320
321 return 0;
322 }
323
324 /* [DIRAC_STD] 10. Sequence Header. sequence_header() */
av_dirac_parse_sequence_header(AVDiracSeqHeader ** pdsh,const uint8_t * buf,size_t buf_size,void * log_ctx)325 int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh,
326 const uint8_t *buf, size_t buf_size,
327 void *log_ctx)
328 {
329 AVDiracSeqHeader *dsh;
330 GetBitContext gb;
331 unsigned video_format, picture_coding_mode;
332 int ret;
333
334 dsh = av_mallocz(sizeof(*dsh));
335 if (!dsh)
336 return AVERROR(ENOMEM);
337
338 ret = init_get_bits8(&gb, buf, buf_size);
339 if (ret < 0)
340 goto fail;
341
342 /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
343 dsh->version.major = get_interleaved_ue_golomb(&gb);
344 dsh->version.minor = get_interleaved_ue_golomb(&gb);
345 dsh->profile = get_interleaved_ue_golomb(&gb);
346 dsh->level = get_interleaved_ue_golomb(&gb);
347 /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
348 * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
349 video_format = get_interleaved_ue_golomb(&gb);
350
351 if (dsh->version.major < 2 && log_ctx)
352 av_log(log_ctx, AV_LOG_WARNING, "Stream is old and may not work\n");
353 else if (dsh->version.major > 2 && log_ctx)
354 av_log(log_ctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
355
356 if (video_format > 20U) {
357 ret = AVERROR_INVALIDDATA;
358 goto fail;
359 }
360
361 /* Fill in defaults for the source parameters. */
362 dsh->width = dirac_source_parameters_defaults[video_format].width;
363 dsh->height = dirac_source_parameters_defaults[video_format].height;
364 dsh->chroma_format = dirac_source_parameters_defaults[video_format].chroma_format;
365 dsh->interlaced = dirac_source_parameters_defaults[video_format].interlaced;
366 dsh->top_field_first = dirac_source_parameters_defaults[video_format].top_field_first;
367 dsh->frame_rate_index = dirac_source_parameters_defaults[video_format].frame_rate_index;
368 dsh->aspect_ratio_index = dirac_source_parameters_defaults[video_format].aspect_ratio_index;
369 dsh->clean_width = dirac_source_parameters_defaults[video_format].clean_width;
370 dsh->clean_height = dirac_source_parameters_defaults[video_format].clean_height;
371 dsh->clean_left_offset = dirac_source_parameters_defaults[video_format].clean_left_offset;
372 dsh->clean_right_offset = dirac_source_parameters_defaults[video_format].clean_right_offset;
373 dsh->pixel_range_index = dirac_source_parameters_defaults[video_format].pixel_range_index;
374 dsh->color_spec_index = dirac_source_parameters_defaults[video_format].color_spec_index;
375
376 /* [DIRAC_STD] 10.3 Source Parameters
377 * Override the defaults. */
378 ret = parse_source_parameters(dsh, &gb, log_ctx);
379 if (ret < 0)
380 goto fail;
381
382 /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
383 * currently only used to signal field coding */
384 picture_coding_mode = get_interleaved_ue_golomb(&gb);
385 if (picture_coding_mode != 0) {
386 if (log_ctx) {
387 av_log(log_ctx, AV_LOG_ERROR, "Unsupported picture coding mode %d",
388 picture_coding_mode);
389 }
390 ret = AVERROR_INVALIDDATA;
391 goto fail;
392 }
393
394 *pdsh = dsh;
395 return 0;
396 fail:
397 av_freep(&dsh);
398 *pdsh = NULL;
399 return ret;
400 }
401 #else
av_dirac_parse_sequence_header(AVDiracSeqHeader ** pdsh,const uint8_t * buf,size_t buf_size,void * log_ctx)402 int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh,
403 const uint8_t *buf, size_t buf_size,
404 void *log_ctx)
405 {
406 return AVERROR(ENOSYS);
407 }
408 #endif
409