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"
33 #include "mpeg12data.h"
35 /* defaults for source parameters */
36 static const dirac_source_params dirac_source_parameters_defaults[] = {
37 { 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 },
38 { 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 },
39 { 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 },
40 { 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 },
41 { 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 },
42 { 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 },
43 { 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 },
44 { 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 },
45 { 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 },
54 { 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
55 { 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
56 { 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
57 { 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
60 /* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */
61 static const AVRational dirac_preset_aspect_ratios[] = {
70 /* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate.
71 * Table 10.3 Available preset frame rate values
73 static const AVRational dirac_frame_rate[] = {
78 /* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal
82 enum AVColorRange color_range;
83 } pixel_range_presets[] = {
84 {8, AVCOL_RANGE_JPEG},
85 {8, AVCOL_RANGE_MPEG},
86 {10, AVCOL_RANGE_MPEG},
87 {12, AVCOL_RANGE_MPEG},
90 static const enum AVColorPrimaries dirac_primaries[] = {
97 enum AVColorPrimaries color_primaries;
98 enum AVColorSpace colorspace;
99 enum AVColorTransferCharacteristic color_trc;
100 } dirac_color_presets[] = {
101 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
102 { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
103 { AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
104 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
105 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ },
108 /* [DIRAC_STD] Table 10.2 Supported chroma sampling formats + luma Offset */
109 static const enum AVPixelFormat dirac_pix_fmt[2][3] = {
110 { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },
111 { AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P },
114 /* [DIRAC_STD] 10.3 Parse Source Parameters.
115 * source_parameters(base_video_format) */
116 static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
117 dirac_source_params *source)
119 AVRational frame_rate = {0,0};
120 unsigned luma_depth = 8, luma_offset = 16;
123 /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
124 /* [DIRAC_STD] custom_dimensions_flag */
126 source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */
127 source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */
130 /* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
131 * chroma_sampling_format(video_params) */
132 /* [DIRAC_STD] custom_chroma_format_flag */
134 /* [DIRAC_STD] CHROMA_FORMAT_INDEX */
135 source->chroma_format = svq3_get_ue_golomb(gb);
136 if (source->chroma_format > 2U) {
137 av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
138 source->chroma_format);
139 return AVERROR_INVALIDDATA;
142 /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
143 /* [DIRAC_STD] custom_scan_format_flag */
145 /* [DIRAC_STD] SOURCE_SAMPLING */
146 source->interlaced = svq3_get_ue_golomb(gb);
147 if (source->interlaced > 1U)
148 return AVERROR_INVALIDDATA;
150 /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */
151 if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */
152 source->frame_rate_index = svq3_get_ue_golomb(gb);
154 if (source->frame_rate_index > 10U)
155 return AVERROR_INVALIDDATA;
157 if (!source->frame_rate_index) {
158 /* [DIRAC_STD] FRAME_RATE_NUMER */
159 frame_rate.num = svq3_get_ue_golomb(gb);
160 /* [DIRAC_STD] FRAME_RATE_DENOM */
161 frame_rate.den = svq3_get_ue_golomb(gb);
164 /* [DIRAC_STD] preset_frame_rate(video_params, index) */
165 if (source->frame_rate_index > 0) {
166 if (source->frame_rate_index <= 8)
167 frame_rate = ff_mpeg12_frame_rate_tab[source->frame_rate_index];
169 /* [DIRAC_STD] Table 10.3 values 9-10 */
170 frame_rate = dirac_frame_rate[source->frame_rate_index-9];
172 av_reduce(&avctx->time_base.num, &avctx->time_base.den,
173 frame_rate.den, frame_rate.num, 1<<30);
175 /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio.
176 * pixel_aspect_ratio(video_params) */
177 if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */
178 /* [DIRAC_STD] index */
179 source->aspect_ratio_index = svq3_get_ue_golomb(gb);
181 if (source->aspect_ratio_index > 6U)
182 return AVERROR_INVALIDDATA;
184 if (!source->aspect_ratio_index) {
185 avctx->sample_aspect_ratio.num = svq3_get_ue_golomb(gb);
186 avctx->sample_aspect_ratio.den = svq3_get_ue_golomb(gb);
189 /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel
190 * aspect ratio values */
191 if (source->aspect_ratio_index > 0)
192 avctx->sample_aspect_ratio =
193 dirac_preset_aspect_ratios[source->aspect_ratio_index-1];
195 /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */
196 if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */
197 /* [DIRAC_STD] CLEAN_WIDTH */
198 source->clean_width = svq3_get_ue_golomb(gb);
199 /* [DIRAC_STD] CLEAN_HEIGHT */
200 source->clean_height = svq3_get_ue_golomb(gb);
201 /* [DIRAC_STD] CLEAN_LEFT_OFFSET */
202 source->clean_left_offset = svq3_get_ue_golomb(gb);
203 /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */
204 source->clean_right_offset = svq3_get_ue_golomb(gb);
207 /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params)
208 * WARNING: Some adaptation seems to be done using the
209 * AVCOL_RANGE_MPEG/JPEG values */
210 if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */
211 /* [DIRAC_STD] index */
212 source->pixel_range_index = svq3_get_ue_golomb(gb);
214 if (source->pixel_range_index > 4U)
215 return AVERROR_INVALIDDATA;
217 /* This assumes either fullrange or MPEG levels only */
218 if (!source->pixel_range_index) {
219 luma_offset = svq3_get_ue_golomb(gb);
220 luma_depth = av_log2(svq3_get_ue_golomb(gb))+1;
221 svq3_get_ue_golomb(gb); /* chroma offset */
222 svq3_get_ue_golomb(gb); /* chroma excursion */
223 avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
226 /* [DIRAC_STD] Table 10.5
227 * Available signal range presets <--> pixel_range_presets */
228 if (source->pixel_range_index > 0) {
229 idx = source->pixel_range_index-1;
230 luma_depth = pixel_range_presets[idx].bitdepth;
231 avctx->color_range = pixel_range_presets[idx].color_range;
235 av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8\n");
237 avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format];
239 /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
240 if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */
241 /* [DIRAC_STD] index */
242 idx = source->color_spec_index = svq3_get_ue_golomb(gb);
244 if (source->color_spec_index > 4U)
245 return AVERROR_INVALIDDATA;
247 avctx->color_primaries = dirac_color_presets[idx].color_primaries;
248 avctx->colorspace = dirac_color_presets[idx].colorspace;
249 avctx->color_trc = dirac_color_presets[idx].color_trc;
251 if (!source->color_spec_index) {
252 /* [DIRAC_STD] 10.3.9.1 Colour primaries */
254 idx = svq3_get_ue_golomb(gb);
256 avctx->color_primaries = dirac_primaries[idx];
258 /* [DIRAC_STD] 10.3.9.2 Colour matrix */
260 idx = svq3_get_ue_golomb(gb);
262 avctx->colorspace = AVCOL_SPC_BT709;
264 avctx->colorspace = AVCOL_SPC_BT470BG;
266 /* [DIRAC_STD] 10.3.9.3 Transfer function */
267 if (get_bits1(gb) && !svq3_get_ue_golomb(gb))
268 avctx->color_trc = AVCOL_TRC_BT709;
271 idx = source->color_spec_index;
272 avctx->color_primaries = dirac_color_presets[idx].color_primaries;
273 avctx->colorspace = dirac_color_presets[idx].colorspace;
274 avctx->color_trc = dirac_color_presets[idx].color_trc;
280 /* [DIRAC_STD] 10. Sequence Header. sequence_header() */
281 int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
282 dirac_source_params *source)
284 unsigned version_major;
285 unsigned video_format, picture_coding_mode;
288 /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
289 version_major = svq3_get_ue_golomb(gb);
290 svq3_get_ue_golomb(gb); /* version_minor */
291 avctx->profile = svq3_get_ue_golomb(gb);
292 avctx->level = svq3_get_ue_golomb(gb);
293 /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
294 * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
295 video_format = svq3_get_ue_golomb(gb);
297 if (version_major < 2)
298 av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n");
299 else if (version_major > 2)
300 av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
302 if (video_format > 20U)
303 return AVERROR_INVALIDDATA;
305 /* Fill in defaults for the source parameters. */
306 *source = dirac_source_parameters_defaults[video_format];
308 /* [DIRAC_STD] 10.3 Source Parameters
309 * Override the defaults. */
310 if (ret = parse_source_parameters(avctx, gb, source))
313 if (ret = av_image_check_size(source->width, source->height, 0, avctx))
316 avcodec_set_dimensions(avctx, source->width, source->height);
318 /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
319 * currently only used to signal field coding */
320 picture_coding_mode = svq3_get_ue_golomb(gb);
321 if (picture_coding_mode != 0) {
322 av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d\n",
323 picture_coding_mode);
324 return AVERROR_INVALIDDATA;