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
35
36 /* defaults for source parameters */
38 { 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 },
39 { 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 },
40 { 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 },
41 { 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 },
42 { 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 },
43 { 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 },
44 { 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 },
45 { 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 },
46 { 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 },
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 { 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
56 { 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
57 { 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
58 { 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
59 };
60
61 /* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */
63 {1, 1},
64 {10, 11},
65 {12, 11},
66 {40, 33},
67 {16, 11},
68 {4, 3},
69 };
70
71 /* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate.
72 * Table 10.3 Available preset frame rate values
73 */
75 {15000, 1001},
76 {25, 2},
77 };
78
79 /* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal
80 * range presets */
81 static const struct {
89 };
90
95 };
96
97 static const struct {
107 };
108
109 /* [DIRAC_STD] Table 10.2 Supported chroma sampling formats + luma Offset */
113 };
114
115 /* [DIRAC_STD] 10.3 Parse Source Parameters.
116 * source_parameters(base_video_format) */
119 {
121 unsigned luma_depth = 8, luma_offset = 16;
122 int idx;
123 int chroma_x_shift, chroma_y_shift;
124
125 /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
126 /* [DIRAC_STD] custom_dimensions_flag */
130 }
131
132 /* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
133 * chroma_sampling_format(video_params) */
134 /* [DIRAC_STD] custom_chroma_format_flag */
136 /* [DIRAC_STD] CHROMA_FORMAT_INDEX */
142 }
143
144 /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
145 /* [DIRAC_STD] custom_scan_format_flag */
147 /* [DIRAC_STD] SOURCE_SAMPLING */
151
152 /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */
153 if (
get_bits1(gb)) {
/* [DIRAC_STD] custom_frame_rate_flag */
155
158
160 /* [DIRAC_STD] FRAME_RATE_NUMER */
162 /* [DIRAC_STD] FRAME_RATE_DENOM */
164 }
165 }
166 /* [DIRAC_STD] preset_frame_rate(video_params, index) */
170 else
171 /* [DIRAC_STD] Table 10.3 values 9-10 */
173 }
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
185
189 }
190 }
191 /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel
192 * aspect ratio values */
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 */
201 /* [DIRAC_STD] CLEAN_HEIGHT */
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
218
219 /* This assumes either fullrange or MPEG levels only */
226 }
227 }
228 /* [DIRAC_STD] Table 10.5
229 * Available signal range presets <--> pixel_range_presets */
234 }
235
236 if (luma_depth > 8)
238
241 if ((source->
width % (1<<chroma_x_shift)) || (source->
height % (1<<chroma_y_shift))) {
242 av_log(avctx,
AV_LOG_ERROR,
"Dimensions must be a integer multiply of the chroma subsampling\n");
244 }
245
246
247 /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
248 if (
get_bits1(gb)) {
/* [DIRAC_STD] custom_colour_spec_flag */
249 /* [DIRAC_STD] index */
251
254
258
260 /* [DIRAC_STD] 10.3.9.1 Colour primaries */
265 }
266 /* [DIRAC_STD] 10.3.9.2 Colour matrix */
269 if (!idx)
271 else if (idx == 1)
273 }
274 /* [DIRAC_STD] 10.3.9.3 Transfer function */
277 }
278 } else {
283 }
284
285 return 0;
286 }
287
288 /* [DIRAC_STD] 10. Sequence Header. sequence_header() */
291 {
292 unsigned version_major;
293 unsigned video_format, picture_coding_mode;
295
296 /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
301 /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
302 * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
304
305 if (version_major < 2)
307 else if (version_major > 2)
309
310 if (video_format > 20
U)
312
313 /* Fill in defaults for the source parameters. */
314 *source = dirac_source_parameters_defaults[video_format];
315
316 /* [DIRAC_STD] 10.3 Source Parameters
317 * Override the defaults. */
320
322 if (ret < 0)
324
326
327 /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
328 * currently only used to signal field coding */
330 if (picture_coding_mode != 0) {
332 picture_coding_mode);
334 }
335 return 0;
336 }