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 },
61 * Dirac Specification ->
62 * Table 10.4 - Available preset pixel aspect ratio values
64 static const AVRational dirac_preset_aspect_ratios[] = {
74 * Dirac Specification ->
75 * Values 9,10 of 10.3.5 Frame Rate. Table 10.3 Available preset frame rate values
77 static const AVRational dirac_frame_rate[] = {
83 * Dirac Specification ->
84 * This should be equivalent to Table 10.5 Available signal range presets
88 enum AVColorRange color_range;
89 } pixel_range_presets[] = {
90 {8, AVCOL_RANGE_JPEG},
91 {8, AVCOL_RANGE_MPEG},
92 {10, AVCOL_RANGE_MPEG},
93 {12, AVCOL_RANGE_MPEG},
96 static const enum AVColorPrimaries dirac_primaries[] = {
102 static const struct {
103 enum AVColorPrimaries color_primaries;
104 enum AVColorSpace colorspace;
105 enum AVColorTransferCharacteristic color_trc;
106 } dirac_color_presets[] = {
107 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
108 { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
109 { AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
110 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 },
111 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ },
115 * Dirac Specification ->
116 * Table 10.2 Supported chroma sampling formats + Luma Offset
118 static const enum PixelFormat dirac_pix_fmt[2][3] = {
119 { PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV420P },
120 { PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ420P },
124 * Dirac Specification ->
125 * 10.3 Parse Source Parameters. source_parameters(base_video_format)
127 static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
128 dirac_source_params *source)
130 AVRational frame_rate = {0,0};
131 unsigned luma_depth = 8, luma_offset = 16;
134 /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
135 if (get_bits1(gb)) { /* [DIRAC_STD] custom_dimensions_flag */
136 source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */
137 source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */
140 /* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
141 chroma_sampling_format(video_params) */
142 if (get_bits1(gb)) /* [DIRAC_STD] custom_chroma_format_flag */
143 source->chroma_format = svq3_get_ue_golomb(gb); /*[DIRAC_STD] CHROMA_FORMAT_INDEX */
144 if (source->chroma_format > 2U) {
145 av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
146 source->chroma_format);
150 /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
151 if (get_bits1(gb)) /* [DIRAC_STD] custom_scan_format_flag */
152 source->interlaced = svq3_get_ue_golomb(gb); /* [DIRAC_STD] SOURCE_SAMPLING */
153 if (source->interlaced > 1U)
156 /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */
157 if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */
158 source->frame_rate_index = svq3_get_ue_golomb(gb);
160 if (source->frame_rate_index > 10U)
163 if (!source->frame_rate_index){
164 frame_rate.num = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_RATE_NUMER */
165 frame_rate.den = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_RATE_DENOM */
168 if (source->frame_rate_index > 0) { /* [DIRAC_STD] preset_frame_rate(video_params,index) */
169 if (source->frame_rate_index <= 8)
170 frame_rate = avpriv_frame_rate_tab[source->frame_rate_index]; /* [DIRAC_STD] Table 10.3 values 1-8 */
172 frame_rate = dirac_frame_rate[source->frame_rate_index-9]; /* [DIRAC_STD] Table 10.3 values 9-10 */
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. pixel_aspect_ratio(video_params) */
178 if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */
179 source->aspect_ratio_index = svq3_get_ue_golomb(gb); /* [DIRAC_STD] index */
181 if (source->aspect_ratio_index > 6U)
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 if (source->aspect_ratio_index > 0) /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel aspect ratio values */
190 avctx->sample_aspect_ratio =
191 dirac_preset_aspect_ratios[source->aspect_ratio_index-1];
193 /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */
194 if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */
195 source->clean_width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] CLEAN_WIDTH */
196 source->clean_height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] CLEAN_HEIGHT */
197 source->clean_left_offset = svq3_get_ue_golomb(gb); /* [DIRAC_STD] CLEAN_LEFT_OFFSET */
198 source->clean_right_offset = svq3_get_ue_golomb(gb); /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */
201 /*[DIRAC_STD] 10.3.8 Signal range. signal_range(video_params)
202 WARNING: Some adaptation seemed to be done using the AVCOL_RANGE_MPEG/JPEG values */
203 if (get_bits1(gb)) { /*[DIRAC_STD] custom_signal_range_flag */
204 source->pixel_range_index = svq3_get_ue_golomb(gb); /*[DIRAC_STD] index */
206 if (source->pixel_range_index > 4U)
209 /* This assumes either fullrange or MPEG levels only */
210 if (!source->pixel_range_index) {
211 luma_offset = svq3_get_ue_golomb(gb);
212 luma_depth = av_log2(svq3_get_ue_golomb(gb))+1;
213 svq3_get_ue_golomb(gb); /* chroma offset @Jordi: Why are these two ignored? */
214 svq3_get_ue_golomb(gb); /* chroma excursion */
216 avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
219 if (source->pixel_range_index > 0) { /*[DIRAC_STD] Take values from Table 10.5 Available signal range presets */
220 idx = source->pixel_range_index-1;
221 luma_depth = pixel_range_presets[idx].bitdepth;
222 avctx->color_range = pixel_range_presets[idx].color_range;
226 av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8");
228 avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format];
230 /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
231 if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */
232 idx = source->color_spec_index = svq3_get_ue_golomb(gb); /* [DIRAC_STD] index */
234 if (source->color_spec_index > 4U)
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;
241 if (!source->color_spec_index) {
242 /* [DIRAC_STD] 10.3.9.1 Color primaries */
244 idx = svq3_get_ue_golomb(gb);
246 avctx->color_primaries = dirac_primaries[idx];
248 /* [DIRAC_STD] 10.3.9.2 Color matrix */
250 idx = svq3_get_ue_golomb(gb);
252 avctx->colorspace = AVCOL_SPC_BT709;
254 avctx->colorspace = AVCOL_SPC_BT470BG;
256 /* [DIRAC_STD] 10.3.9.3 Transfer function */
257 if (get_bits1(gb) && !svq3_get_ue_golomb(gb))
258 avctx->color_trc = AVCOL_TRC_BT709;
261 idx = source->color_spec_index;
262 avctx->color_primaries = dirac_color_presets[idx].color_primaries;
263 avctx->colorspace = dirac_color_presets[idx].colorspace;
264 avctx->color_trc = dirac_color_presets[idx].color_trc;
271 * Dirac Specification ->
272 * 10. Sequence Header. sequence_header()
274 int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
275 dirac_source_params *source)
277 unsigned version_major;
278 unsigned video_format, picture_coding_mode;
280 /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
281 version_major = svq3_get_ue_golomb(gb);
282 svq3_get_ue_golomb(gb); /* version_minor */
283 avctx->profile = svq3_get_ue_golomb(gb);
284 avctx->level = svq3_get_ue_golomb(gb);
285 /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
286 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
287 video_format = svq3_get_ue_golomb(gb);
289 if (version_major < 2)
290 av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n");
291 else if (version_major > 2)
292 av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
294 if (video_format > 20U)
297 /* Fill in defaults for the source parameters. */
298 *source = dirac_source_parameters_defaults[video_format];
300 /*[DIRAC_STD] 10.3 Source Parameters
301 Override the defaults. */
302 if (parse_source_parameters(avctx, gb, source))
305 if (av_image_check_size(source->width, source->height, 0, avctx))
308 avcodec_set_dimensions(avctx, source->width, source->height);
310 /*[DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
311 currently only used to signal field coding */
312 picture_coding_mode = svq3_get_ue_golomb(gb);
313 if (picture_coding_mode != 0) {
314 av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d",
315 picture_coding_mode);