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;
122 int chroma_x_shift, chroma_y_shift;
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 > 2U) {
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 > 1U)
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 > 10U)
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 > 6U)
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 > 4U)
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\n");
238 avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format];
239 avcodec_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift, &chroma_y_shift);
240 if ((source->width % (1<<chroma_x_shift)) || (source->height % (1<<chroma_y_shift))) {
241 av_log(avctx, AV_LOG_ERROR, "Dimensions must be a integer multiply of the chroma subsampling\n");
242 return AVERROR_INVALIDDATA;
246 /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
247 if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */
248 /* [DIRAC_STD] index */
249 idx = source->color_spec_index = svq3_get_ue_golomb(gb);
251 if (source->color_spec_index > 4U)
252 return AVERROR_INVALIDDATA;
254 avctx->color_primaries = dirac_color_presets[idx].color_primaries;
255 avctx->colorspace = dirac_color_presets[idx].colorspace;
256 avctx->color_trc = dirac_color_presets[idx].color_trc;
258 if (!source->color_spec_index) {
259 /* [DIRAC_STD] 10.3.9.1 Colour primaries */
261 idx = svq3_get_ue_golomb(gb);
263 avctx->color_primaries = dirac_primaries[idx];
265 /* [DIRAC_STD] 10.3.9.2 Colour matrix */
267 idx = svq3_get_ue_golomb(gb);
269 avctx->colorspace = AVCOL_SPC_BT709;
271 avctx->colorspace = AVCOL_SPC_BT470BG;
273 /* [DIRAC_STD] 10.3.9.3 Transfer function */
274 if (get_bits1(gb) && !svq3_get_ue_golomb(gb))
275 avctx->color_trc = AVCOL_TRC_BT709;
278 idx = source->color_spec_index;
279 avctx->color_primaries = dirac_color_presets[idx].color_primaries;
280 avctx->colorspace = dirac_color_presets[idx].colorspace;
281 avctx->color_trc = dirac_color_presets[idx].color_trc;
287 /* [DIRAC_STD] 10. Sequence Header. sequence_header() */
288 int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
289 dirac_source_params *source)
291 unsigned version_major;
292 unsigned video_format, picture_coding_mode;
295 /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
296 version_major = svq3_get_ue_golomb(gb);
297 svq3_get_ue_golomb(gb); /* version_minor */
298 avctx->profile = svq3_get_ue_golomb(gb);
299 avctx->level = svq3_get_ue_golomb(gb);
300 /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
301 * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
302 video_format = svq3_get_ue_golomb(gb);
304 if (version_major < 2)
305 av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n");
306 else if (version_major > 2)
307 av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
309 if (video_format > 20U)
310 return AVERROR_INVALIDDATA;
312 /* Fill in defaults for the source parameters. */
313 *source = dirac_source_parameters_defaults[video_format];
315 /* [DIRAC_STD] 10.3 Source Parameters
316 * Override the defaults. */
317 if (ret = parse_source_parameters(avctx, gb, source))
320 if (ret = av_image_check_size(source->width, source->height, 0, avctx))
323 avcodec_set_dimensions(avctx, source->width, source->height);
325 /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
326 * currently only used to signal field coding */
327 picture_coding_mode = svq3_get_ue_golomb(gb);
328 if (picture_coding_mode != 0) {
329 av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d\n",
330 picture_coding_mode);
331 return AVERROR_INVALIDDATA;