2 * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
3 * Copyright (C) 2009 David Conrad
5 * This file is part of Libav.
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.
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.
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
25 * @author Marco Gerards <marco@gnu.org>
28 #include "libavutil/imgutils.h"
32 #include "mpeg12data.h"
34 // defaults for source parameters
35 static const dirac_source_params dirac_source_parameters_defaults
[] = {
36 { 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 },
37 { 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 },
38 { 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 },
39 { 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 },
40 { 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 },
41 { 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 },
42 { 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 },
43 { 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 },
44 { 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 },
46 { 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 },
47 { 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 },
48 { 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 },
49 { 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 },
50 { 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 },
51 { 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 },
52 { 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 },
53 { 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 },
61 /* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */
62 static const AVRational dirac_preset_aspect_ratios
[] = {
71 /* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate.
72 * Table 10.3 Available preset frame rate values
74 static const AVRational dirac_frame_rate
[] = {
79 /* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal
83 enum AVColorRange color_range
;
84 } pixel_range_presets
[] = {
85 {8, AVCOL_RANGE_JPEG
},
86 {8, AVCOL_RANGE_MPEG
},
87 {10, AVCOL_RANGE_MPEG
},
88 {12, AVCOL_RANGE_MPEG
},
91 static const enum AVColorPrimaries dirac_primaries
[] = {
98 enum AVColorPrimaries color_primaries
;
99 enum AVColorSpace colorspace
;
100 enum AVColorTransferCharacteristic color_trc
;
101 } dirac_color_presets
[] = {
102 { AVCOL_PRI_BT709
, AVCOL_SPC_BT709
, AVCOL_TRC_BT709
},
103 { AVCOL_PRI_SMPTE170M
, AVCOL_SPC_BT470BG
, AVCOL_TRC_BT709
},
104 { AVCOL_PRI_BT470BG
, AVCOL_SPC_BT470BG
, AVCOL_TRC_BT709
},
105 { AVCOL_PRI_BT709
, AVCOL_SPC_BT709
, AVCOL_TRC_BT709
},
106 { AVCOL_PRI_BT709
, AVCOL_SPC_BT709
, AVCOL_TRC_UNSPECIFIED
/* DCinema */ },
109 /* [DIRAC_STD] Table 10.2 Supported chroma sampling formats + luma Offset */
110 static const enum AVPixelFormat dirac_pix_fmt
[2][3] = {
111 { AV_PIX_FMT_YUV444P
, AV_PIX_FMT_YUV422P
, AV_PIX_FMT_YUV420P
},
112 { AV_PIX_FMT_YUVJ444P
, AV_PIX_FMT_YUVJ422P
, AV_PIX_FMT_YUVJ420P
},
115 /* [DIRAC_STD] 10.3 Parse Source Parameters.
116 * source_parameters(base_video_format) */
117 static int parse_source_parameters(AVCodecContext
*avctx
, GetBitContext
*gb
,
118 dirac_source_params
*source
)
120 AVRational frame_rate
= {0,0};
121 unsigned luma_depth
= 8, luma_offset
= 16;
124 /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
125 /* [DIRAC_STD] custom_dimensions_flag */
127 source
->width
= svq3_get_ue_golomb(gb
); /* [DIRAC_STD] FRAME_WIDTH */
128 source
->height
= svq3_get_ue_golomb(gb
); /* [DIRAC_STD] FRAME_HEIGHT */
131 /* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
132 * chroma_sampling_format(video_params) */
133 /* [DIRAC_STD] custom_chroma_format_flag */
135 /* [DIRAC_STD] CHROMA_FORMAT_INDEX */
136 source
->chroma_format
= svq3_get_ue_golomb(gb
);
137 if (source
->chroma_format
> 2) {
138 av_log(avctx
, AV_LOG_ERROR
, "Unknown chroma format %d\n",
139 source
->chroma_format
);
140 return AVERROR_INVALIDDATA
;
143 /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
144 /* [DIRAC_STD] custom_scan_format_flag */
146 /* [DIRAC_STD] SOURCE_SAMPLING */
147 source
->interlaced
= svq3_get_ue_golomb(gb
);
148 if (source
->interlaced
> 1)
149 return AVERROR_INVALIDDATA
;
151 /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */
152 if (get_bits1(gb
)) { /* [DIRAC_STD] custom_frame_rate_flag */
153 source
->frame_rate_index
= svq3_get_ue_golomb(gb
);
155 if (source
->frame_rate_index
> 10)
156 return AVERROR_INVALIDDATA
;
158 if (!source
->frame_rate_index
) {
159 /* [DIRAC_STD] FRAME_RATE_NUMER */
160 frame_rate
.num
= svq3_get_ue_golomb(gb
);
161 /* [DIRAC_STD] FRAME_RATE_DENOM */
162 frame_rate
.den
= svq3_get_ue_golomb(gb
);
165 /* [DIRAC_STD] preset_frame_rate(video_params, index) */
166 if (source
->frame_rate_index
> 0) {
167 if (source
->frame_rate_index
<= 8)
168 frame_rate
= ff_mpeg12_frame_rate_tab
[source
->frame_rate_index
];
170 /* [DIRAC_STD] Table 10.3 values 9-10 */
171 frame_rate
= dirac_frame_rate
[source
->frame_rate_index
-9];
173 av_reduce(&avctx
->time_base
.num
, &avctx
->time_base
.den
,
174 frame_rate
.den
, frame_rate
.num
, 1<<30);
176 /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio.
177 * pixel_aspect_ratio(video_params) */
178 if (get_bits1(gb
)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */
179 /* [DIRAC_STD] index */
180 source
->aspect_ratio_index
= svq3_get_ue_golomb(gb
);
182 if (source
->aspect_ratio_index
> 6)
183 return AVERROR_INVALIDDATA
;
185 if (!source
->aspect_ratio_index
) {
186 avctx
->sample_aspect_ratio
.num
= svq3_get_ue_golomb(gb
);
187 avctx
->sample_aspect_ratio
.den
= svq3_get_ue_golomb(gb
);
190 /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel
191 * aspect ratio values */
192 if (source
->aspect_ratio_index
> 0)
193 avctx
->sample_aspect_ratio
=
194 dirac_preset_aspect_ratios
[source
->aspect_ratio_index
-1];
196 /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */
197 if (get_bits1(gb
)) { /* [DIRAC_STD] custom_clean_area_flag */
198 /* [DIRAC_STD] CLEAN_WIDTH */
199 source
->clean_width
= svq3_get_ue_golomb(gb
);
200 /* [DIRAC_STD] CLEAN_HEIGHT */
201 source
->clean_height
= svq3_get_ue_golomb(gb
);
202 /* [DIRAC_STD] CLEAN_LEFT_OFFSET */
203 source
->clean_left_offset
= svq3_get_ue_golomb(gb
);
204 /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */
205 source
->clean_right_offset
= svq3_get_ue_golomb(gb
);
208 /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params)
209 * WARNING: Some adaptation seems to be done using the
210 * AVCOL_RANGE_MPEG/JPEG values */
211 if (get_bits1(gb
)) { /* [DIRAC_STD] custom_signal_range_flag */
212 /* [DIRAC_STD] index */
213 source
->pixel_range_index
= svq3_get_ue_golomb(gb
);
215 if (source
->pixel_range_index
> 4)
216 return AVERROR_INVALIDDATA
;
218 // This assumes either fullrange or MPEG levels only
219 if (!source
->pixel_range_index
) {
220 luma_offset
= svq3_get_ue_golomb(gb
);
221 luma_depth
= av_log2(svq3_get_ue_golomb(gb
))+1;
222 svq3_get_ue_golomb(gb
); /* chroma offset */
223 svq3_get_ue_golomb(gb
); /* chroma excursion */
224 avctx
->color_range
= luma_offset
? AVCOL_RANGE_MPEG
: AVCOL_RANGE_JPEG
;
227 /* [DIRAC_STD] Table 10.5
228 * Available signal range presets <--> pixel_range_presets */
229 if (source
->pixel_range_index
> 0) {
230 idx
= source
->pixel_range_index
-1;
231 luma_depth
= pixel_range_presets
[idx
].bitdepth
;
232 avctx
->color_range
= pixel_range_presets
[idx
].color_range
;
236 av_log(avctx
, AV_LOG_WARNING
, "Bitdepth greater than 8");
238 avctx
->pix_fmt
= dirac_pix_fmt
[!luma_offset
][source
->chroma_format
];
240 /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
241 if (get_bits1(gb
)) { /* [DIRAC_STD] custom_colour_spec_flag */
242 /* [DIRAC_STD] index */
243 idx
= source
->color_spec_index
= svq3_get_ue_golomb(gb
);
245 if (source
->color_spec_index
> 4)
246 return AVERROR_INVALIDDATA
;
248 avctx
->color_primaries
= dirac_color_presets
[idx
].color_primaries
;
249 avctx
->colorspace
= dirac_color_presets
[idx
].colorspace
;
250 avctx
->color_trc
= dirac_color_presets
[idx
].color_trc
;
252 if (!source
->color_spec_index
) {
253 /* [DIRAC_STD] 10.3.9.1 Colour primaries */
255 idx
= svq3_get_ue_golomb(gb
);
257 avctx
->color_primaries
= dirac_primaries
[idx
];
259 /* [DIRAC_STD] 10.3.9.2 Colour matrix */
261 idx
= svq3_get_ue_golomb(gb
);
263 avctx
->colorspace
= AVCOL_SPC_BT709
;
265 avctx
->colorspace
= AVCOL_SPC_BT470BG
;
267 /* [DIRAC_STD] 10.3.9.3 Transfer function */
268 if (get_bits1(gb
) && !svq3_get_ue_golomb(gb
))
269 avctx
->color_trc
= AVCOL_TRC_BT709
;
272 idx
= source
->color_spec_index
;
273 avctx
->color_primaries
= dirac_color_presets
[idx
].color_primaries
;
274 avctx
->colorspace
= dirac_color_presets
[idx
].colorspace
;
275 avctx
->color_trc
= dirac_color_presets
[idx
].color_trc
;
281 /* [DIRAC_STD] 10. Sequence Header. sequence_header() */
282 int avpriv_dirac_parse_sequence_header(AVCodecContext
*avctx
, GetBitContext
*gb
,
283 dirac_source_params
*source
)
285 unsigned version_major
;
286 unsigned video_format
, picture_coding_mode
;
289 /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
290 version_major
= svq3_get_ue_golomb(gb
);
291 svq3_get_ue_golomb(gb
); /* version_minor */
292 avctx
->profile
= svq3_get_ue_golomb(gb
);
293 avctx
->level
= svq3_get_ue_golomb(gb
);
294 /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
295 * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
296 video_format
= svq3_get_ue_golomb(gb
);
298 if (version_major
< 2)
299 av_log(avctx
, AV_LOG_WARNING
, "Stream is old and may not work\n");
300 else if (version_major
> 2)
301 av_log(avctx
, AV_LOG_WARNING
, "Stream may have unhandled features\n");
303 if (video_format
> 20)
304 return AVERROR_INVALIDDATA
;
306 // Fill in defaults for the source parameters.
307 *source
= dirac_source_parameters_defaults
[video_format
];
309 /* [DIRAC_STD] 10.3 Source Parameters
310 * Override the defaults. */
311 if (ret
= parse_source_parameters(avctx
, gb
, source
))
314 if (ret
= av_image_check_size(source
->width
, source
->height
, 0, avctx
))
317 avcodec_set_dimensions(avctx
, source
->width
, source
->height
);
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
;