2 * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
3 * Copyright (C) 2009 David Conrad
4 * Copyright (C) 2011 Jordi Ortiz
6 * This file is part of FFmpeg.
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.
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.
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
26 * @author Marco Gerards <marco@gnu.org>, David Conrad, Jordi Ortiz <nenjordi@gmail.com>
29 #include "libavutil/imgutils.h"
35 #include "mpeg12data.h"
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 },
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 },
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 },
64 /* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */
65 static const AVRational dirac_preset_aspect_ratios
[] = {
74 /* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate.
75 * Table 10.3 Available preset frame rate values
77 static const AVRational dirac_frame_rate
[] = {
82 /* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal
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
},
94 static const enum AVColorPrimaries dirac_primaries
[] = {
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 */ },
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
},
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
)
123 AVRational frame_rate
= { 0, 0 };
124 unsigned luma_depth
= 8, luma_offset
= 16;
126 int chroma_x_shift
, chroma_y_shift
;
128 /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
129 /* [DIRAC_STD] custom_dimensions_flag */
131 source
->width
= svq3_get_ue_golomb(gb
); /* [DIRAC_STD] FRAME_WIDTH */
132 source
->height
= svq3_get_ue_golomb(gb
); /* [DIRAC_STD] FRAME_HEIGHT */
135 /* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
136 * chroma_sampling_format(video_params) */
137 /* [DIRAC_STD] custom_chroma_format_flag */
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
;
147 /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
148 /* [DIRAC_STD] custom_scan_format_flag */
150 /* [DIRAC_STD] SOURCE_SAMPLING */
151 source
->interlaced
= svq3_get_ue_golomb(gb
);
152 if (source
->interlaced
> 1U)
153 return AVERROR_INVALIDDATA
;
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
);
159 if (source
->frame_rate_index
> 10U)
160 return AVERROR_INVALIDDATA
;
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
);
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
];
174 /* [DIRAC_STD] Table 10.3 values 9-10 */
175 frame_rate
= dirac_frame_rate
[source
->frame_rate_index
- 9];
177 av_reduce(&avctx
->time_base
.num
, &avctx
->time_base
.den
,
178 frame_rate
.den
, frame_rate
.num
, 1 << 30);
180 /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio.
181 * pixel_aspect_ratio(video_params) */
182 if (get_bits1(gb
)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */
183 /* [DIRAC_STD] index */
184 source
->aspect_ratio_index
= svq3_get_ue_golomb(gb
);
186 if (source
->aspect_ratio_index
> 6U)
187 return AVERROR_INVALIDDATA
;
189 if (!source
->aspect_ratio_index
) {
190 avctx
->sample_aspect_ratio
.num
= svq3_get_ue_golomb(gb
);
191 avctx
->sample_aspect_ratio
.den
= svq3_get_ue_golomb(gb
);
194 /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel
195 * aspect ratio values */
196 if (source
->aspect_ratio_index
> 0)
197 avctx
->sample_aspect_ratio
=
198 dirac_preset_aspect_ratios
[source
->aspect_ratio_index
- 1];
200 /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */
201 if (get_bits1(gb
)) { /* [DIRAC_STD] custom_clean_area_flag */
202 /* [DIRAC_STD] CLEAN_WIDTH */
203 source
->clean_width
= svq3_get_ue_golomb(gb
);
204 /* [DIRAC_STD] CLEAN_HEIGHT */
205 source
->clean_height
= svq3_get_ue_golomb(gb
);
206 /* [DIRAC_STD] CLEAN_LEFT_OFFSET */
207 source
->clean_left_offset
= svq3_get_ue_golomb(gb
);
208 /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */
209 source
->clean_right_offset
= svq3_get_ue_golomb(gb
);
212 /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params)
213 * WARNING: Some adaptation seems to be done using the
214 * AVCOL_RANGE_MPEG/JPEG values */
215 if (get_bits1(gb
)) { /* [DIRAC_STD] custom_signal_range_flag */
216 /* [DIRAC_STD] index */
217 source
->pixel_range_index
= svq3_get_ue_golomb(gb
);
219 if (source
->pixel_range_index
> 4U)
220 return AVERROR_INVALIDDATA
;
222 /* This assumes either fullrange or MPEG levels only */
223 if (!source
->pixel_range_index
) {
224 luma_offset
= svq3_get_ue_golomb(gb
);
225 luma_depth
= av_log2(svq3_get_ue_golomb(gb
)) + 1;
226 svq3_get_ue_golomb(gb
); /* chroma offset */
227 svq3_get_ue_golomb(gb
); /* chroma excursion */
228 avctx
->color_range
= luma_offset
? AVCOL_RANGE_MPEG
232 /* [DIRAC_STD] Table 10.5
233 * Available signal range presets <--> pixel_range_presets */
234 if (source
->pixel_range_index
> 0) {
235 idx
= source
->pixel_range_index
- 1;
236 luma_depth
= pixel_range_presets
[idx
].bitdepth
;
237 avctx
->color_range
= pixel_range_presets
[idx
].color_range
;
241 av_log(avctx
, AV_LOG_WARNING
, "Bitdepth greater than 8\n");
243 avctx
->pix_fmt
= dirac_pix_fmt
[!luma_offset
][source
->chroma_format
];
244 avcodec_get_chroma_sub_sample(avctx
->pix_fmt
, &chroma_x_shift
, &chroma_y_shift
);
245 if ((source
->width
% (1<<chroma_x_shift
)) || (source
->height
% (1<<chroma_y_shift
))) {
246 av_log(avctx
, AV_LOG_ERROR
, "Dimensions must be an integer multiple of the chroma subsampling\n");
247 return AVERROR_INVALIDDATA
;
251 /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
252 if (get_bits1(gb
)) { /* [DIRAC_STD] custom_colour_spec_flag */
253 /* [DIRAC_STD] index */
254 idx
= source
->color_spec_index
= svq3_get_ue_golomb(gb
);
256 if (source
->color_spec_index
> 4U)
257 return AVERROR_INVALIDDATA
;
259 avctx
->color_primaries
= dirac_color_presets
[idx
].color_primaries
;
260 avctx
->colorspace
= dirac_color_presets
[idx
].colorspace
;
261 avctx
->color_trc
= dirac_color_presets
[idx
].color_trc
;
263 if (!source
->color_spec_index
) {
264 /* [DIRAC_STD] 10.3.9.1 Colour primaries */
266 idx
= svq3_get_ue_golomb(gb
);
268 avctx
->color_primaries
= dirac_primaries
[idx
];
270 /* [DIRAC_STD] 10.3.9.2 Colour matrix */
272 idx
= svq3_get_ue_golomb(gb
);
274 avctx
->colorspace
= AVCOL_SPC_BT709
;
276 avctx
->colorspace
= AVCOL_SPC_BT470BG
;
278 /* [DIRAC_STD] 10.3.9.3 Transfer function */
279 if (get_bits1(gb
) && !svq3_get_ue_golomb(gb
))
280 avctx
->color_trc
= AVCOL_TRC_BT709
;
283 idx
= source
->color_spec_index
;
284 avctx
->color_primaries
= dirac_color_presets
[idx
].color_primaries
;
285 avctx
->colorspace
= dirac_color_presets
[idx
].colorspace
;
286 avctx
->color_trc
= dirac_color_presets
[idx
].color_trc
;
292 /* [DIRAC_STD] 10. Sequence Header. sequence_header() */
293 int avpriv_dirac_parse_sequence_header(AVCodecContext
*avctx
, GetBitContext
*gb
,
294 dirac_source_params
*source
)
296 unsigned version_major
;
297 unsigned video_format
, picture_coding_mode
;
300 /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
301 version_major
= svq3_get_ue_golomb(gb
);
302 svq3_get_ue_golomb(gb
); /* version_minor */
303 avctx
->profile
= svq3_get_ue_golomb(gb
);
304 avctx
->level
= svq3_get_ue_golomb(gb
);
305 /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
306 * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
307 video_format
= svq3_get_ue_golomb(gb
);
309 if (version_major
< 2)
310 av_log(avctx
, AV_LOG_WARNING
, "Stream is old and may not work\n");
311 else if (version_major
> 2)
312 av_log(avctx
, AV_LOG_WARNING
, "Stream may have unhandled features\n");
314 if (video_format
> 20U)
315 return AVERROR_INVALIDDATA
;
317 /* Fill in defaults for the source parameters. */
318 *source
= dirac_source_parameters_defaults
[video_format
];
320 /* [DIRAC_STD] 10.3 Source Parameters
321 * Override the defaults. */
322 if (ret
= parse_source_parameters(avctx
, gb
, source
))
325 ret
= ff_set_dimensions(avctx
, source
->width
, source
->height
);
329 ff_set_sar(avctx
, avctx
->sample_aspect_ratio
);
331 /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
332 * currently only used to signal field coding */
333 picture_coding_mode
= svq3_get_ue_golomb(gb
);
334 if (picture_coding_mode
!= 0) {
335 av_log(avctx
, AV_LOG_ERROR
, "Unsupported picture coding mode %d\n",
336 picture_coding_mode
);
337 return AVERROR_INVALIDDATA
;