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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 | /* defaults for source parameters */ | |
38 | static const dirac_source_params dirac_source_parameters_defaults[] = { | |
39 | { 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 }, | |
40 | { 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 }, | |
41 | { 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 }, | |
42 | { 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 }, | |
43 | { 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 }, | |
44 | { 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 }, | |
45 | { 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 }, | |
46 | { 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 }, | |
47 | { 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 }, | |
48 | ||
49 | { 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 }, | |
50 | { 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 }, | |
51 | { 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 }, | |
52 | { 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 }, | |
53 | { 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 }, | |
54 | { 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 }, | |
55 | { 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 }, | |
56 | { 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 }, | |
57 | ||
58 | { 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, | |
59 | { 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, | |
60 | { 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, | |
61 | { 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, | |
62 | }; | |
63 | ||
64 | /* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */ | |
65 | static const AVRational dirac_preset_aspect_ratios[] = { | |
66 | { 1, 1 }, | |
67 | { 10, 11 }, | |
68 | { 12, 11 }, | |
69 | { 40, 33 }, | |
70 | { 16, 11 }, | |
71 | { 4, 3 }, | |
72 | }; | |
73 | ||
74 | /* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate. | |
75 | * Table 10.3 Available preset frame rate values | |
76 | */ | |
77 | static const AVRational dirac_frame_rate[] = { | |
78 | { 15000, 1001 }, | |
79 | { 25, 2 }, | |
80 | }; | |
81 | ||
82 | /* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal | |
83 | * range presets */ | |
84 | static const struct { | |
85 | uint8_t bitdepth; | |
86 | enum AVColorRange color_range; | |
87 | } pixel_range_presets[] = { | |
88 | { 8, AVCOL_RANGE_JPEG }, | |
89 | { 8, AVCOL_RANGE_MPEG }, | |
90 | { 10, AVCOL_RANGE_MPEG }, | |
91 | { 12, AVCOL_RANGE_MPEG }, | |
92 | }; | |
93 | ||
94 | static const enum AVColorPrimaries dirac_primaries[] = { | |
95 | AVCOL_PRI_BT709, | |
96 | AVCOL_PRI_SMPTE170M, | |
97 | AVCOL_PRI_BT470BG, | |
98 | }; | |
99 | ||
100 | static const struct { | |
101 | enum AVColorPrimaries color_primaries; | |
102 | enum AVColorSpace colorspace; | |
103 | enum AVColorTransferCharacteristic color_trc; | |
104 | } dirac_color_presets[] = { | |
105 | { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, | |
106 | { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, | |
107 | { AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, | |
108 | { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, | |
109 | { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ }, | |
110 | }; | |
111 | ||
112 | /* [DIRAC_STD] Table 10.2 Supported chroma sampling formats + luma Offset */ | |
113 | static const enum AVPixelFormat dirac_pix_fmt[2][3] = { | |
114 | { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P }, | |
115 | { AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P }, | |
116 | }; | |
117 | ||
118 | /* [DIRAC_STD] 10.3 Parse Source Parameters. | |
119 | * source_parameters(base_video_format) */ | |
120 | static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb, | |
121 | dirac_source_params *source) | |
122 | { | |
123 | AVRational frame_rate = { 0, 0 }; | |
124 | unsigned luma_depth = 8, luma_offset = 16; | |
125 | int idx; | |
126 | int chroma_x_shift, chroma_y_shift; | |
127 | ||
128 | /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */ | |
129 | /* [DIRAC_STD] custom_dimensions_flag */ | |
130 | if (get_bits1(gb)) { | |
131 | source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */ | |
132 | source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */ | |
133 | } | |
134 | ||
135 | /* [DIRAC_STD] 10.3.3 Chroma Sampling Format. | |
136 | * chroma_sampling_format(video_params) */ | |
137 | /* [DIRAC_STD] custom_chroma_format_flag */ | |
138 | if (get_bits1(gb)) | |
139 | /* [DIRAC_STD] CHROMA_FORMAT_INDEX */ | |
140 | source->chroma_format = svq3_get_ue_golomb(gb); | |
141 | if (source->chroma_format > 2U) { | |
142 | av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n", | |
143 | source->chroma_format); | |
144 | return AVERROR_INVALIDDATA; | |
145 | } | |
146 | ||
147 | /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */ | |
148 | /* [DIRAC_STD] custom_scan_format_flag */ | |
149 | if (get_bits1(gb)) | |
150 | /* [DIRAC_STD] SOURCE_SAMPLING */ | |
151 | source->interlaced = svq3_get_ue_golomb(gb); | |
152 | if (source->interlaced > 1U) | |
153 | return AVERROR_INVALIDDATA; | |
154 | ||
155 | /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */ | |
156 | if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */ | |
157 | source->frame_rate_index = svq3_get_ue_golomb(gb); | |
158 | ||
159 | if (source->frame_rate_index > 10U) | |
160 | return AVERROR_INVALIDDATA; | |
161 | ||
162 | if (!source->frame_rate_index) { | |
163 | /* [DIRAC_STD] FRAME_RATE_NUMER */ | |
164 | frame_rate.num = svq3_get_ue_golomb(gb); | |
165 | /* [DIRAC_STD] FRAME_RATE_DENOM */ | |
166 | frame_rate.den = svq3_get_ue_golomb(gb); | |
167 | } | |
168 | } | |
169 | /* [DIRAC_STD] preset_frame_rate(video_params, index) */ | |
170 | if (source->frame_rate_index > 0) { | |
171 | if (source->frame_rate_index <= 8) | |
172 | frame_rate = ff_mpeg12_frame_rate_tab[source->frame_rate_index]; | |
173 | else | |
174 | /* [DIRAC_STD] Table 10.3 values 9-10 */ | |
175 | frame_rate = dirac_frame_rate[source->frame_rate_index - 9]; | |
176 | } | |
f6fa7814 | 177 | avctx->framerate = frame_rate; |
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178 | |
179 | /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio. | |
180 | * pixel_aspect_ratio(video_params) */ | |
181 | if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */ | |
182 | /* [DIRAC_STD] index */ | |
183 | source->aspect_ratio_index = svq3_get_ue_golomb(gb); | |
184 | ||
185 | if (source->aspect_ratio_index > 6U) | |
186 | return AVERROR_INVALIDDATA; | |
187 | ||
188 | if (!source->aspect_ratio_index) { | |
189 | avctx->sample_aspect_ratio.num = svq3_get_ue_golomb(gb); | |
190 | avctx->sample_aspect_ratio.den = svq3_get_ue_golomb(gb); | |
191 | } | |
192 | } | |
193 | /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel | |
194 | * aspect ratio values */ | |
195 | if (source->aspect_ratio_index > 0) | |
196 | avctx->sample_aspect_ratio = | |
197 | dirac_preset_aspect_ratios[source->aspect_ratio_index - 1]; | |
198 | ||
199 | /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */ | |
200 | if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */ | |
201 | /* [DIRAC_STD] CLEAN_WIDTH */ | |
202 | source->clean_width = svq3_get_ue_golomb(gb); | |
203 | /* [DIRAC_STD] CLEAN_HEIGHT */ | |
204 | source->clean_height = svq3_get_ue_golomb(gb); | |
205 | /* [DIRAC_STD] CLEAN_LEFT_OFFSET */ | |
206 | source->clean_left_offset = svq3_get_ue_golomb(gb); | |
207 | /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */ | |
208 | source->clean_right_offset = svq3_get_ue_golomb(gb); | |
209 | } | |
210 | ||
211 | /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params) | |
212 | * WARNING: Some adaptation seems to be done using the | |
213 | * AVCOL_RANGE_MPEG/JPEG values */ | |
214 | if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */ | |
215 | /* [DIRAC_STD] index */ | |
216 | source->pixel_range_index = svq3_get_ue_golomb(gb); | |
217 | ||
218 | if (source->pixel_range_index > 4U) | |
219 | return AVERROR_INVALIDDATA; | |
220 | ||
221 | /* This assumes either fullrange or MPEG levels only */ | |
222 | if (!source->pixel_range_index) { | |
223 | luma_offset = svq3_get_ue_golomb(gb); | |
224 | luma_depth = av_log2(svq3_get_ue_golomb(gb)) + 1; | |
225 | svq3_get_ue_golomb(gb); /* chroma offset */ | |
226 | svq3_get_ue_golomb(gb); /* chroma excursion */ | |
227 | avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG | |
228 | : AVCOL_RANGE_JPEG; | |
229 | } | |
230 | } | |
231 | /* [DIRAC_STD] Table 10.5 | |
232 | * Available signal range presets <--> pixel_range_presets */ | |
233 | if (source->pixel_range_index > 0) { | |
234 | idx = source->pixel_range_index - 1; | |
235 | luma_depth = pixel_range_presets[idx].bitdepth; | |
236 | avctx->color_range = pixel_range_presets[idx].color_range; | |
237 | } | |
238 | ||
239 | if (luma_depth > 8) | |
240 | av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8\n"); | |
241 | ||
242 | avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format]; | |
243 | avcodec_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift, &chroma_y_shift); | |
244 | if ((source->width % (1<<chroma_x_shift)) || (source->height % (1<<chroma_y_shift))) { | |
245 | av_log(avctx, AV_LOG_ERROR, "Dimensions must be an integer multiple of the chroma subsampling\n"); | |
246 | return AVERROR_INVALIDDATA; | |
247 | } | |
248 | ||
249 | ||
250 | /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */ | |
251 | if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */ | |
252 | /* [DIRAC_STD] index */ | |
253 | idx = source->color_spec_index = svq3_get_ue_golomb(gb); | |
254 | ||
255 | if (source->color_spec_index > 4U) | |
256 | return AVERROR_INVALIDDATA; | |
257 | ||
258 | avctx->color_primaries = dirac_color_presets[idx].color_primaries; | |
259 | avctx->colorspace = dirac_color_presets[idx].colorspace; | |
260 | avctx->color_trc = dirac_color_presets[idx].color_trc; | |
261 | ||
262 | if (!source->color_spec_index) { | |
263 | /* [DIRAC_STD] 10.3.9.1 Colour primaries */ | |
264 | if (get_bits1(gb)) { | |
265 | idx = svq3_get_ue_golomb(gb); | |
266 | if (idx < 3U) | |
267 | avctx->color_primaries = dirac_primaries[idx]; | |
268 | } | |
269 | /* [DIRAC_STD] 10.3.9.2 Colour matrix */ | |
270 | if (get_bits1(gb)) { | |
271 | idx = svq3_get_ue_golomb(gb); | |
272 | if (!idx) | |
273 | avctx->colorspace = AVCOL_SPC_BT709; | |
274 | else if (idx == 1) | |
275 | avctx->colorspace = AVCOL_SPC_BT470BG; | |
276 | } | |
277 | /* [DIRAC_STD] 10.3.9.3 Transfer function */ | |
278 | if (get_bits1(gb) && !svq3_get_ue_golomb(gb)) | |
279 | avctx->color_trc = AVCOL_TRC_BT709; | |
280 | } | |
281 | } else { | |
282 | idx = source->color_spec_index; | |
283 | avctx->color_primaries = dirac_color_presets[idx].color_primaries; | |
284 | avctx->colorspace = dirac_color_presets[idx].colorspace; | |
285 | avctx->color_trc = dirac_color_presets[idx].color_trc; | |
286 | } | |
287 | ||
288 | return 0; | |
289 | } | |
290 | ||
291 | /* [DIRAC_STD] 10. Sequence Header. sequence_header() */ | |
292 | int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb, | |
293 | dirac_source_params *source) | |
294 | { | |
295 | unsigned version_major; | |
296 | unsigned video_format, picture_coding_mode; | |
297 | int ret; | |
298 | ||
299 | /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */ | |
300 | version_major = svq3_get_ue_golomb(gb); | |
301 | svq3_get_ue_golomb(gb); /* version_minor */ | |
302 | avctx->profile = svq3_get_ue_golomb(gb); | |
303 | avctx->level = svq3_get_ue_golomb(gb); | |
304 | /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in | |
305 | * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */ | |
306 | video_format = svq3_get_ue_golomb(gb); | |
307 | ||
308 | if (version_major < 2) | |
309 | av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n"); | |
310 | else if (version_major > 2) | |
311 | av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n"); | |
312 | ||
313 | if (video_format > 20U) | |
314 | return AVERROR_INVALIDDATA; | |
315 | ||
316 | /* Fill in defaults for the source parameters. */ | |
317 | *source = dirac_source_parameters_defaults[video_format]; | |
318 | ||
319 | /* [DIRAC_STD] 10.3 Source Parameters | |
320 | * Override the defaults. */ | |
321 | if (ret = parse_source_parameters(avctx, gb, source)) | |
322 | return ret; | |
323 | ||
324 | ret = ff_set_dimensions(avctx, source->width, source->height); | |
325 | if (ret < 0) | |
326 | return ret; | |
327 | ||
328 | ff_set_sar(avctx, avctx->sample_aspect_ratio); | |
329 | ||
330 | /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames | |
331 | * currently only used to signal field coding */ | |
332 | picture_coding_mode = svq3_get_ue_golomb(gb); | |
333 | if (picture_coding_mode != 0) { | |
334 | av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d\n", | |
335 | picture_coding_mode); | |
336 | return AVERROR_INVALIDDATA; | |
337 | } | |
338 | return 0; | |
339 | } |