2 * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
3 * Copyright (C) 2009 David Conrad
5 * This file is part of FFmpeg.
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 "libavcore/imgutils.h"
32 #include "mpeg12data.h"
34 // defaults for source parameters
35 static const dirac_source_params dirac_source_parameters_defaults[] = {
36 { 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 },
37 { 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 },
38 { 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 },
39 { 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 },
40 { 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 },
41 { 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 },
42 { 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 },
43 { 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 },
44 { 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 },
55 { 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
56 { 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
57 { 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 },
58 { 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 },
61 static const AVRational dirac_preset_aspect_ratios[] = {
70 static const AVRational dirac_frame_rate[] = {
77 enum AVColorRange color_range;
78 } pixel_range_presets[] = {
79 {8, AVCOL_RANGE_JPEG},
80 {8, AVCOL_RANGE_MPEG},
81 {10, AVCOL_RANGE_MPEG},
82 {12, AVCOL_RANGE_MPEG},
85 static const enum AVColorPrimaries dirac_primaries[] = {
92 enum AVColorPrimaries color_primaries;
93 enum AVColorSpace colorspace;
94 enum AVColorTransferCharacteristic color_trc;
95 } dirac_color_presets[] = {
96 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
97 { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
98 { AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
99 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
100 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ },
103 static const enum PixelFormat dirac_pix_fmt[2][3] = {
104 { PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV420P },
105 { PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ420P },
108 static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
109 dirac_source_params *source)
111 AVRational frame_rate = (AVRational){0,0};
112 unsigned luma_depth = 8, luma_offset = 16;
116 source->width = svq3_get_ue_golomb(gb);
117 source->height = svq3_get_ue_golomb(gb);
120 // chroma subsampling
122 source->chroma_format = svq3_get_ue_golomb(gb);
123 if (source->chroma_format > 2) {
124 av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
125 source->chroma_format);
130 source->interlaced = svq3_get_ue_golomb(gb);
131 if (source->interlaced > 1)
136 source->frame_rate_index = svq3_get_ue_golomb(gb);
138 if (source->frame_rate_index > 10)
141 if (!source->frame_rate_index) {
142 frame_rate.num = svq3_get_ue_golomb(gb);
143 frame_rate.den = svq3_get_ue_golomb(gb);
146 if (source->frame_rate_index > 0) {
147 if (source->frame_rate_index <= 8)
148 frame_rate = ff_frame_rate_tab[source->frame_rate_index];
150 frame_rate = dirac_frame_rate[source->frame_rate_index-9];
152 av_reduce(&avctx->time_base.num, &avctx->time_base.den,
153 frame_rate.den, frame_rate.num, 1<<30);
157 source->aspect_ratio_index = svq3_get_ue_golomb(gb);
159 if (source->aspect_ratio_index > 6)
162 if (!source->aspect_ratio_index) {
163 avctx->sample_aspect_ratio.num = svq3_get_ue_golomb(gb);
164 avctx->sample_aspect_ratio.den = svq3_get_ue_golomb(gb);
167 if (source->aspect_ratio_index > 0)
168 avctx->sample_aspect_ratio =
169 dirac_preset_aspect_ratios[source->aspect_ratio_index-1];
172 source->clean_width = svq3_get_ue_golomb(gb);
173 source->clean_height = svq3_get_ue_golomb(gb);
174 source->clean_left_offset = svq3_get_ue_golomb(gb);
175 source->clean_right_offset = svq3_get_ue_golomb(gb);
178 // Override signal range.
180 source->pixel_range_index = svq3_get_ue_golomb(gb);
182 if (source->pixel_range_index > 4)
185 // This assumes either fullrange or MPEG levels only
186 if (!source->pixel_range_index) {
187 luma_offset = svq3_get_ue_golomb(gb);
188 luma_depth = av_log2(svq3_get_ue_golomb(gb))+1;
189 svq3_get_ue_golomb(gb); // chroma offset
190 svq3_get_ue_golomb(gb); // chroma excursion
192 avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
195 if (source->pixel_range_index > 0) {
196 idx = source->pixel_range_index-1;
197 luma_depth = pixel_range_presets[idx].bitdepth;
198 avctx->color_range = pixel_range_presets[idx].color_range;
202 av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8");
204 avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format];
208 idx = source->color_spec_index = svq3_get_ue_golomb(gb);
210 if (source->color_spec_index > 4)
213 avctx->color_primaries = dirac_color_presets[idx].color_primaries;
214 avctx->colorspace = dirac_color_presets[idx].colorspace;
215 avctx->color_trc = dirac_color_presets[idx].color_trc;
217 if (!source->color_spec_index) {
219 idx = svq3_get_ue_golomb(gb);
221 avctx->color_primaries = dirac_primaries[idx];
225 idx = svq3_get_ue_golomb(gb);
227 avctx->colorspace = AVCOL_SPC_BT709;
229 avctx->colorspace = AVCOL_SPC_BT470BG;
232 if (get_bits1(gb) && !svq3_get_ue_golomb(gb))
233 avctx->color_trc = AVCOL_TRC_BT709;
236 idx = source->color_spec_index;
237 avctx->color_primaries = dirac_color_presets[idx].color_primaries;
238 avctx->colorspace = dirac_color_presets[idx].colorspace;
239 avctx->color_trc = dirac_color_presets[idx].color_trc;
245 int ff_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
246 dirac_source_params *source)
248 unsigned version_major, version_minor;
249 unsigned video_format, picture_coding_mode;
251 version_major = svq3_get_ue_golomb(gb);
252 version_minor = svq3_get_ue_golomb(gb);
253 avctx->profile = svq3_get_ue_golomb(gb);
254 avctx->level = svq3_get_ue_golomb(gb);
255 video_format = svq3_get_ue_golomb(gb);
257 if (version_major < 2)
258 av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n");
259 else if (version_major > 2)
260 av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
262 if (video_format > 20)
265 // Fill in defaults for the source parameters.
266 *source = dirac_source_parameters_defaults[video_format];
268 // Override the defaults.
269 if (parse_source_parameters(avctx, gb, source))
272 if (av_image_check_size(source->width, source->height, 0, avctx))
275 avcodec_set_dimensions(avctx, source->width, source->height);
277 // currently only used to signal field coding
278 picture_coding_mode = svq3_get_ue_golomb(gb);
279 if (picture_coding_mode != 0) {
280 av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d",
281 picture_coding_mode);