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"
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 },
47 { 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 },
48 { 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 },
49 { 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 },
50 { 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 },
51 { 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 },
52 { 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 },
53 { 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 },
54 { 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 },
56 { 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
57 { 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
58 { 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
59 { 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
62 /* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */
63 static const AVRational dirac_preset_aspect_ratios[] = {
72 /* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate.
73 * Table 10.3 Available preset frame rate values
75 static const AVRational dirac_frame_rate[] = {
80 /* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal
84 enum AVColorRange color_range;
85 } pixel_range_presets[] = {
86 {8, AVCOL_RANGE_JPEG},
87 {8, AVCOL_RANGE_MPEG},
88 {10, AVCOL_RANGE_MPEG},
89 {12, AVCOL_RANGE_MPEG},
92 static const enum AVColorPrimaries dirac_primaries[] = {
99 enum AVColorPrimaries color_primaries;
100 enum AVColorSpace colorspace;
101 enum AVColorTransferCharacteristic color_trc;
102 } dirac_color_presets[] = {
103 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
104 { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
105 { AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
106 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
107 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ },
110 /* [DIRAC_STD] Table 10.2 Supported chroma sampling formats + luma Offset */
111 static const enum AVPixelFormat dirac_pix_fmt[2][3] = {
112 { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },
113 { AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P },
116 /* [DIRAC_STD] 10.3 Parse Source Parameters.
117 * source_parameters(base_video_format) */
118 static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
119 dirac_source_params *source)
121 AVRational frame_rate = {0,0};
122 unsigned luma_depth = 8, luma_offset = 16;
125 /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
126 /* [DIRAC_STD] custom_dimensions_flag */
128 source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */
129 source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */
132 /* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
133 * chroma_sampling_format(video_params) */
134 /* [DIRAC_STD] custom_chroma_format_flag */
136 /* [DIRAC_STD] CHROMA_FORMAT_INDEX */
137 source->chroma_format = svq3_get_ue_golomb(gb);
138 if (source->chroma_format > 2) {
139 av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
140 source->chroma_format);
141 return AVERROR_INVALIDDATA;
144 /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
145 /* [DIRAC_STD] custom_scan_format_flag */
147 /* [DIRAC_STD] SOURCE_SAMPLING */
148 source->interlaced = svq3_get_ue_golomb(gb);
149 if (source->interlaced > 1)
150 return AVERROR_INVALIDDATA;
152 /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */
153 if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */
154 source->frame_rate_index = svq3_get_ue_golomb(gb);
156 if (source->frame_rate_index > 10)
157 return AVERROR_INVALIDDATA;
159 if (!source->frame_rate_index) {
160 /* [DIRAC_STD] FRAME_RATE_NUMER */
161 frame_rate.num = svq3_get_ue_golomb(gb);
162 /* [DIRAC_STD] FRAME_RATE_DENOM */
163 frame_rate.den = svq3_get_ue_golomb(gb);
166 /* [DIRAC_STD] preset_frame_rate(video_params, index) */
167 if (source->frame_rate_index > 0) {
168 if (source->frame_rate_index <= 8)
169 frame_rate = ff_mpeg12_frame_rate_tab[source->frame_rate_index];
171 /* [DIRAC_STD] Table 10.3 values 9-10 */
172 frame_rate = dirac_frame_rate[source->frame_rate_index-9];
174 av_reduce(&avctx->time_base.num, &avctx->time_base.den,
175 frame_rate.den, frame_rate.num, 1<<30);
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 : AVCOL_RANGE_JPEG;
228 /* [DIRAC_STD] Table 10.5
229 * Available signal range presets <--> pixel_range_presets */
230 if (source->pixel_range_index > 0) {
231 idx = source->pixel_range_index-1;
232 luma_depth = pixel_range_presets[idx].bitdepth;
233 avctx->color_range = pixel_range_presets[idx].color_range;
237 av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8");
239 avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format];
241 /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
242 if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */
243 /* [DIRAC_STD] index */
244 idx = source->color_spec_index = svq3_get_ue_golomb(gb);
246 if (source->color_spec_index > 4)
247 return AVERROR_INVALIDDATA;
249 avctx->color_primaries = dirac_color_presets[idx].color_primaries;
250 avctx->colorspace = dirac_color_presets[idx].colorspace;
251 avctx->color_trc = dirac_color_presets[idx].color_trc;
253 if (!source->color_spec_index) {
254 /* [DIRAC_STD] 10.3.9.1 Colour primaries */
256 idx = svq3_get_ue_golomb(gb);
258 avctx->color_primaries = dirac_primaries[idx];
260 /* [DIRAC_STD] 10.3.9.2 Colour matrix */
262 idx = svq3_get_ue_golomb(gb);
264 avctx->colorspace = AVCOL_SPC_BT709;
266 avctx->colorspace = AVCOL_SPC_BT470BG;
268 /* [DIRAC_STD] 10.3.9.3 Transfer function */
269 if (get_bits1(gb) && !svq3_get_ue_golomb(gb))
270 avctx->color_trc = AVCOL_TRC_BT709;
273 idx = source->color_spec_index;
274 avctx->color_primaries = dirac_color_presets[idx].color_primaries;
275 avctx->colorspace = dirac_color_presets[idx].colorspace;
276 avctx->color_trc = dirac_color_presets[idx].color_trc;
282 /* [DIRAC_STD] 10. Sequence Header. sequence_header() */
283 int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
284 dirac_source_params *source)
286 unsigned version_major;
287 unsigned video_format, picture_coding_mode;
290 /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
291 version_major = svq3_get_ue_golomb(gb);
292 svq3_get_ue_golomb(gb); /* version_minor */
293 avctx->profile = svq3_get_ue_golomb(gb);
294 avctx->level = svq3_get_ue_golomb(gb);
295 /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
296 * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
297 video_format = svq3_get_ue_golomb(gb);
299 if (version_major < 2)
300 av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n");
301 else if (version_major > 2)
302 av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
304 if (video_format > 20)
305 return AVERROR_INVALIDDATA;
307 // Fill in defaults for the source parameters.
308 *source = dirac_source_parameters_defaults[video_format];
310 /* [DIRAC_STD] 10.3 Source Parameters
311 * Override the defaults. */
312 if (ret = parse_source_parameters(avctx, gb, source))
315 ret = ff_set_dimensions(avctx, source->width, source->height);
319 ff_set_sar(avctx, avctx->sample_aspect_ratio);
321 /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
322 * currently only used to signal field coding */
323 picture_coding_mode = svq3_get_ue_golomb(gb);
324 if (picture_coding_mode != 0) {
325 av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d",
326 picture_coding_mode);
327 return AVERROR_INVALIDDATA;