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"
34 #include "mpeg12data.h"
36 // defaults for source parameters
37 static const dirac_source_params dirac_source_parameters_defaults[] = {
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 },
48 { 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 },
49 { 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 },
50 { 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 },
51 { 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 },
52 { 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 },
53 { 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 },
54 { 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 },
55 { 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 },
57 { 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
58 { 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
59 { 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
60 { 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
63 /* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */
64 static const AVRational dirac_preset_aspect_ratios[] = {
73 /* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate.
74 * Table 10.3 Available preset frame rate values
76 static const AVRational dirac_frame_rate[] = {
81 /* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal
85 enum AVColorRange color_range;
86 } pixel_range_presets[] = {
87 { 8, AVCOL_RANGE_JPEG },
88 { 8, AVCOL_RANGE_MPEG },
89 { 10, AVCOL_RANGE_MPEG },
90 { 12, AVCOL_RANGE_MPEG },
93 static const enum AVColorPrimaries dirac_primaries[] = {
100 enum AVColorPrimaries color_primaries;
101 enum AVColorSpace colorspace;
102 enum AVColorTransferCharacteristic color_trc;
103 } dirac_color_presets[] = {
104 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
105 { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
106 { AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
107 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
108 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ },
111 /* [DIRAC_STD] Table 10.2 Supported chroma sampling formats + luma Offset */
112 static const enum AVPixelFormat dirac_pix_fmt[2][3] = {
113 { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },
114 { AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P },
117 /* [DIRAC_STD] 10.3 Parse Source Parameters.
118 * source_parameters(base_video_format) */
119 static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
120 dirac_source_params *source)
122 AVRational frame_rate = { 0, 0 };
123 unsigned luma_depth = 8, luma_offset = 16;
126 /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
127 /* [DIRAC_STD] custom_dimensions_flag */
129 source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */
130 source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */
133 /* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
134 * chroma_sampling_format(video_params) */
135 /* [DIRAC_STD] custom_chroma_format_flag */
137 /* [DIRAC_STD] CHROMA_FORMAT_INDEX */
138 source->chroma_format = svq3_get_ue_golomb(gb);
139 if (source->chroma_format > 2) {
140 av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
141 source->chroma_format);
142 return AVERROR_INVALIDDATA;
145 /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
146 /* [DIRAC_STD] custom_scan_format_flag */
148 /* [DIRAC_STD] SOURCE_SAMPLING */
149 source->interlaced = svq3_get_ue_golomb(gb);
150 if (source->interlaced > 1)
151 return AVERROR_INVALIDDATA;
153 /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */
154 if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */
155 source->frame_rate_index = svq3_get_ue_golomb(gb);
157 if (source->frame_rate_index > 10)
158 return AVERROR_INVALIDDATA;
160 if (!source->frame_rate_index) {
161 /* [DIRAC_STD] FRAME_RATE_NUMER */
162 frame_rate.num = svq3_get_ue_golomb(gb);
163 /* [DIRAC_STD] FRAME_RATE_DENOM */
164 frame_rate.den = svq3_get_ue_golomb(gb);
167 /* [DIRAC_STD] preset_frame_rate(video_params, index) */
168 if (source->frame_rate_index > 0) {
169 if (source->frame_rate_index <= 8)
170 frame_rate = ff_mpeg12_frame_rate_tab[source->frame_rate_index];
172 /* [DIRAC_STD] Table 10.3 values 9-10 */
173 frame_rate = dirac_frame_rate[source->frame_rate_index - 9];
175 avctx->framerate = frame_rate;
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 */
181 source->aspect_ratio_index = svq3_get_ue_golomb(gb);
183 if (source->aspect_ratio_index > 6)
184 return AVERROR_INVALIDDATA;
186 if (!source->aspect_ratio_index) {
187 avctx->sample_aspect_ratio.num = svq3_get_ue_golomb(gb);
188 avctx->sample_aspect_ratio.den = svq3_get_ue_golomb(gb);
191 /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel
192 * aspect ratio values */
193 if (source->aspect_ratio_index > 0)
194 avctx->sample_aspect_ratio =
195 dirac_preset_aspect_ratios[source->aspect_ratio_index - 1];
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 */
200 source->clean_width = svq3_get_ue_golomb(gb);
201 /* [DIRAC_STD] CLEAN_HEIGHT */
202 source->clean_height = svq3_get_ue_golomb(gb);
203 /* [DIRAC_STD] CLEAN_LEFT_OFFSET */
204 source->clean_left_offset = svq3_get_ue_golomb(gb);
205 /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */
206 source->clean_right_offset = svq3_get_ue_golomb(gb);
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 */
214 source->pixel_range_index = svq3_get_ue_golomb(gb);
216 if (source->pixel_range_index > 4)
217 return AVERROR_INVALIDDATA;
219 // This assumes either fullrange or MPEG levels only
220 if (!source->pixel_range_index) {
221 luma_offset = svq3_get_ue_golomb(gb);
222 luma_depth = av_log2(svq3_get_ue_golomb(gb)) + 1;
223 svq3_get_ue_golomb(gb); /* chroma offset */
224 svq3_get_ue_golomb(gb); /* chroma excursion */
225 avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG
229 /* [DIRAC_STD] Table 10.5
230 * Available signal range presets <--> pixel_range_presets */
231 if (source->pixel_range_index > 0) {
232 idx = source->pixel_range_index - 1;
233 luma_depth = pixel_range_presets[idx].bitdepth;
234 avctx->color_range = pixel_range_presets[idx].color_range;
238 av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8");
240 avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format];
242 /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
243 if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */
244 /* [DIRAC_STD] index */
245 idx = source->color_spec_index = svq3_get_ue_golomb(gb);
247 if (source->color_spec_index > 4)
248 return AVERROR_INVALIDDATA;
250 avctx->color_primaries = dirac_color_presets[idx].color_primaries;
251 avctx->colorspace = dirac_color_presets[idx].colorspace;
252 avctx->color_trc = dirac_color_presets[idx].color_trc;
254 if (!source->color_spec_index) {
255 /* [DIRAC_STD] 10.3.9.1 Colour primaries */
257 idx = svq3_get_ue_golomb(gb);
259 avctx->color_primaries = dirac_primaries[idx];
261 /* [DIRAC_STD] 10.3.9.2 Colour matrix */
263 idx = svq3_get_ue_golomb(gb);
265 avctx->colorspace = AVCOL_SPC_BT709;
267 avctx->colorspace = AVCOL_SPC_BT470BG;
269 /* [DIRAC_STD] 10.3.9.3 Transfer function */
270 if (get_bits1(gb) && !svq3_get_ue_golomb(gb))
271 avctx->color_trc = AVCOL_TRC_BT709;
274 idx = source->color_spec_index;
275 avctx->color_primaries = dirac_color_presets[idx].color_primaries;
276 avctx->colorspace = dirac_color_presets[idx].colorspace;
277 avctx->color_trc = dirac_color_presets[idx].color_trc;
283 /* [DIRAC_STD] 10. Sequence Header. sequence_header() */
284 int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
285 dirac_source_params *source)
287 unsigned version_major;
288 unsigned video_format, picture_coding_mode;
291 /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
292 version_major = svq3_get_ue_golomb(gb);
293 svq3_get_ue_golomb(gb); /* version_minor */
294 avctx->profile = svq3_get_ue_golomb(gb);
295 avctx->level = svq3_get_ue_golomb(gb);
296 /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
297 * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
298 video_format = svq3_get_ue_golomb(gb);
300 if (version_major < 2)
301 av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n");
302 else if (version_major > 2)
303 av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
305 if (video_format > 20)
306 return AVERROR_INVALIDDATA;
308 // Fill in defaults for the source parameters.
309 *source = dirac_source_parameters_defaults[video_format];
311 /* [DIRAC_STD] 10.3 Source Parameters
312 * Override the defaults. */
313 if (ret = parse_source_parameters(avctx, gb, source))
316 ret = ff_set_dimensions(avctx, source->width, source->height);
320 ff_set_sar(avctx, avctx->sample_aspect_ratio);
322 /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
323 * currently only used to signal field coding */
324 picture_coding_mode = svq3_get_ue_golomb(gb);
325 if (picture_coding_mode != 0) {
326 av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d",
327 picture_coding_mode);
328 return AVERROR_INVALIDDATA;