GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/dirac.c Lines: 101 143 70.6 %
Date: 2019-11-20 04:07:19 Branches: 45 92 48.9 %

Line Branch Exec Source
1
/*
2
 * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
3
 * Copyright (C) 2009 David Conrad
4
 * Copyright (C) 2011 Jordi Ortiz
5
 *
6
 * This file is part of FFmpeg.
7
 *
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.
12
 *
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.
17
 *
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
21
 */
22
23
/**
24
 * @file
25
 * Dirac Decoder
26
 * @author Marco Gerards <marco@gnu.org>, David Conrad, Jordi Ortiz <nenjordi@gmail.com>
27
 */
28
29
#include "libavutil/imgutils.h"
30
31
#include "avcodec.h"
32
#include "dirac.h"
33
#include "golomb.h"
34
#include "internal.h"
35
#include "mpeg12data.h"
36
37
#if CONFIG_DIRAC_PARSE
38
39
typedef struct dirac_source_params {
40
    unsigned width;
41
    unsigned height;
42
    uint8_t chroma_format;          ///< 0: 444  1: 422  2: 420
43
44
    uint8_t interlaced;
45
    uint8_t top_field_first;
46
47
    uint8_t frame_rate_index;       ///< index into dirac_frame_rate[]
48
    uint8_t aspect_ratio_index;     ///< index into dirac_aspect_ratio[]
49
50
    uint16_t clean_width;
51
    uint16_t clean_height;
52
    uint16_t clean_left_offset;
53
    uint16_t clean_right_offset;
54
55
    uint8_t pixel_range_index;      ///< index into dirac_pixel_range_presets[]
56
    uint8_t color_spec_index;       ///< index into dirac_color_spec_presets[]
57
} dirac_source_params;
58
59
/* defaults for source parameters */
60
static const dirac_source_params dirac_source_parameters_defaults[] = {
61
    {  640,  480, 2, 0, 0,  1, 1,  640,  480, 0, 0, 1, 0 },
62
    {  176,  120, 2, 0, 0,  9, 2,  176,  120, 0, 0, 1, 1 },
63
    {  176,  144, 2, 0, 1, 10, 3,  176,  144, 0, 0, 1, 2 },
64
    {  352,  240, 2, 0, 0,  9, 2,  352,  240, 0, 0, 1, 1 },
65
    {  352,  288, 2, 0, 1, 10, 3,  352,  288, 0, 0, 1, 2 },
66
    {  704,  480, 2, 0, 0,  9, 2,  704,  480, 0, 0, 1, 1 },
67
    {  704,  576, 2, 0, 1, 10, 3,  704,  576, 0, 0, 1, 2 },
68
    {  720,  480, 1, 1, 0,  4, 2,  704,  480, 8, 0, 3, 1 },
69
    {  720,  576, 1, 1, 1,  3, 3,  704,  576, 8, 0, 3, 2 },
70
71
    { 1280,  720, 1, 0, 1,  7, 1, 1280,  720, 0, 0, 3, 3 },
72
    { 1280,  720, 1, 0, 1,  6, 1, 1280,  720, 0, 0, 3, 3 },
73
    { 1920, 1080, 1, 1, 1,  4, 1, 1920, 1080, 0, 0, 3, 3 },
74
    { 1920, 1080, 1, 1, 1,  3, 1, 1920, 1080, 0, 0, 3, 3 },
75
    { 1920, 1080, 1, 0, 1,  7, 1, 1920, 1080, 0, 0, 3, 3 },
76
    { 1920, 1080, 1, 0, 1,  6, 1, 1920, 1080, 0, 0, 3, 3 },
77
    { 2048, 1080, 0, 0, 1,  2, 1, 2048, 1080, 0, 0, 4, 4 },
78
    { 4096, 2160, 0, 0, 1,  2, 1, 4096, 2160, 0, 0, 4, 4 },
79
80
    { 3840, 2160, 1, 0, 1,  7, 1, 3840, 2160, 0, 0, 3, 3 },
81
    { 3840, 2160, 1, 0, 1,  6, 1, 3840, 2160, 0, 0, 3, 3 },
82
    { 7680, 4320, 1, 0, 1,  7, 1, 3840, 2160, 0, 0, 3, 3 },
83
    { 7680, 4320, 1, 0, 1,  6, 1, 3840, 2160, 0, 0, 3, 3 },
84
};
85
86
/* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */
87
static const AVRational dirac_preset_aspect_ratios[] = {
88
    {  1,  1 },
89
    { 10, 11 },
90
    { 12, 11 },
91
    { 40, 33 },
92
    { 16, 11 },
93
    {  4,  3 },
94
};
95
96
/* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate.
97
 * Table 10.3 Available preset frame rate values
98
 */
99
static const AVRational dirac_frame_rate[] = {
100
    { 15000, 1001 },
101
    {    25,    2 },
102
};
103
104
/* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal
105
 * range presets */
106
static const struct {
107
    uint8_t             bitdepth;
108
    enum AVColorRange   color_range;
109
} pixel_range_presets[] = {
110
    {  8, AVCOL_RANGE_JPEG },
111
    {  8, AVCOL_RANGE_MPEG },
112
    { 10, AVCOL_RANGE_MPEG },
113
    { 12, AVCOL_RANGE_MPEG },
114
};
115
116
static const enum AVColorPrimaries dirac_primaries[] = {
117
    AVCOL_PRI_BT709,
118
    AVCOL_PRI_SMPTE170M,
119
    AVCOL_PRI_BT470BG,
120
};
121
122
static const struct {
123
    enum AVColorPrimaries color_primaries;
124
    enum AVColorSpace colorspace;
125
    enum AVColorTransferCharacteristic color_trc;
126
} dirac_color_presets[] = {
127
    { AVCOL_PRI_BT709,     AVCOL_SPC_BT709,   AVCOL_TRC_BT709 },
128
    { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
129
    { AVCOL_PRI_BT470BG,   AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 },
130
    { AVCOL_PRI_BT709,     AVCOL_SPC_BT709,   AVCOL_TRC_BT709 },
131
    { AVCOL_PRI_BT709,     AVCOL_SPC_BT709,   AVCOL_TRC_UNSPECIFIED /* DCinema */ },
132
};
133
134
/* [DIRAC_STD] Table 10.2 Supported chroma sampling formats */
135
static const enum AVPixelFormat dirac_pix_fmt[][3] = {
136
    {AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12},
137
    {AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12},
138
    {AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12},
139
};
140
141
/* [DIRAC_STD] 10.3 Parse Source Parameters.
142
 * source_parameters(base_video_format) */
143
70
static int parse_source_parameters(AVDiracSeqHeader *dsh, GetBitContext *gb,
144
                                   void *log_ctx)
145
{
146
70
    AVRational frame_rate = { 0, 0 };
147
70
    unsigned luma_depth = 8, luma_offset = 16;
148
    int idx;
149
    int chroma_x_shift, chroma_y_shift;
150
    int ret;
151
152
    /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
153
    /* [DIRAC_STD] custom_dimensions_flag */
154
70
    if (get_bits1(gb)) {
155
70
        dsh->width  = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH  */
156
70
        dsh->height = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */
157
    }
158
159
    /* [DIRAC_STD] 10.3.3 Chroma Sampling Format.
160
     *  chroma_sampling_format(video_params) */
161
    /* [DIRAC_STD] custom_chroma_format_flag */
162
70
    if (get_bits1(gb))
163
        /* [DIRAC_STD] CHROMA_FORMAT_INDEX */
164
70
        dsh->chroma_format = get_interleaved_ue_golomb(gb);
165
70
    if (dsh->chroma_format > 2U) {
166
        if (log_ctx)
167
            av_log(log_ctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
168
                   dsh->chroma_format);
169
        return AVERROR_INVALIDDATA;
170
    }
171
172
    /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */
173
    /* [DIRAC_STD] custom_scan_format_flag */
174
70
    if (get_bits1(gb))
175
        /* [DIRAC_STD] SOURCE_SAMPLING */
176
70
        dsh->interlaced = get_interleaved_ue_golomb(gb);
177
70
    if (dsh->interlaced > 1U)
178
        return AVERROR_INVALIDDATA;
179
180
    /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */
181
70
    if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */
182
70
        dsh->frame_rate_index = get_interleaved_ue_golomb(gb);
183
184
70
        if (dsh->frame_rate_index > 10U)
185
            return AVERROR_INVALIDDATA;
186
187
70
        if (!dsh->frame_rate_index) {
188
            /* [DIRAC_STD] FRAME_RATE_NUMER */
189
66
            frame_rate.num = get_interleaved_ue_golomb(gb);
190
            /* [DIRAC_STD] FRAME_RATE_DENOM */
191
66
            frame_rate.den = get_interleaved_ue_golomb(gb);
192
        }
193
    }
194
    /* [DIRAC_STD] preset_frame_rate(video_params, index) */
195
70
    if (dsh->frame_rate_index > 0) {
196
4
        if (dsh->frame_rate_index <= 8)
197
4
            frame_rate = ff_mpeg12_frame_rate_tab[dsh->frame_rate_index];
198
        else
199
            /* [DIRAC_STD] Table 10.3 values 9-10 */
200
            frame_rate = dirac_frame_rate[dsh->frame_rate_index - 9];
201
    }
202
70
    dsh->framerate = frame_rate;
203
204
    /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio.
205
     * pixel_aspect_ratio(video_params) */
206
70
    if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */
207
        /* [DIRAC_STD] index */
208
70
        dsh->aspect_ratio_index = get_interleaved_ue_golomb(gb);
209
210
70
        if (dsh->aspect_ratio_index > 6U)
211
            return AVERROR_INVALIDDATA;
212
213
70
        if (!dsh->aspect_ratio_index) {
214
66
            dsh->sample_aspect_ratio.num = get_interleaved_ue_golomb(gb);
215
66
            dsh->sample_aspect_ratio.den = get_interleaved_ue_golomb(gb);
216
        }
217
    }
218
    /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel
219
     *  aspect ratio values */
220
70
    if (dsh->aspect_ratio_index > 0)
221
4
        dsh->sample_aspect_ratio =
222
4
            dirac_preset_aspect_ratios[dsh->aspect_ratio_index - 1];
223
224
    /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */
225
70
    if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */
226
        /* [DIRAC_STD] CLEAN_WIDTH */
227
4
        dsh->clean_width = get_interleaved_ue_golomb(gb);
228
        /* [DIRAC_STD] CLEAN_HEIGHT */
229
4
        dsh->clean_height = get_interleaved_ue_golomb(gb);
230
        /* [DIRAC_STD] CLEAN_LEFT_OFFSET */
231
4
        dsh->clean_left_offset = get_interleaved_ue_golomb(gb);
232
        /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */
233
4
        dsh->clean_right_offset = get_interleaved_ue_golomb(gb);
234
    }
235
236
    /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params)
237
     * WARNING: Some adaptation seems to be done using the
238
     * AVCOL_RANGE_MPEG/JPEG values */
239
70
    if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */
240
        /* [DIRAC_STD] index */
241
70
        dsh->pixel_range_index = get_interleaved_ue_golomb(gb);
242
243
70
        if (dsh->pixel_range_index > 4U)
244
            return AVERROR_INVALIDDATA;
245
246
        /* This assumes either fullrange or MPEG levels only */
247
70
        if (!dsh->pixel_range_index) {
248
            luma_offset = get_interleaved_ue_golomb(gb);
249
            luma_depth  = av_log2(get_interleaved_ue_golomb(gb)) + 1;
250
            get_interleaved_ue_golomb(gb); /* chroma offset    */
251
            get_interleaved_ue_golomb(gb); /* chroma excursion */
252
            dsh->color_range = luma_offset ? AVCOL_RANGE_MPEG
253
                                           : AVCOL_RANGE_JPEG;
254
        }
255
    }
256
    /* [DIRAC_STD] Table 10.5
257
     * Available signal range presets <--> pixel_range_presets */
258
70
    if (dsh->pixel_range_index > 0) {
259
70
        idx                = dsh->pixel_range_index - 1;
260
70
        luma_depth         = pixel_range_presets[idx].bitdepth;
261
70
        dsh->color_range   = pixel_range_presets[idx].color_range;
262
    }
263
264
70
    dsh->bit_depth = luma_depth;
265
266
    /* Full range 8 bts uses the same pix_fmts as limited range 8 bits */
267
70
    dsh->pixel_range_index += dsh->pixel_range_index == 1;
268
269
70
    if (dsh->pixel_range_index < 2U)
270
        return AVERROR_INVALIDDATA;
271
272
70
    dsh->pix_fmt = dirac_pix_fmt[dsh->chroma_format][dsh->pixel_range_index-2];
273
70
    ret = av_pix_fmt_get_chroma_sub_sample(dsh->pix_fmt, &chroma_x_shift, &chroma_y_shift);
274
70
    if (ret)
275
        return ret;
276
277

70
    if ((dsh->width % (1<<chroma_x_shift)) || (dsh->height % (1<<chroma_y_shift))) {
278
        if (log_ctx)
279
            av_log(log_ctx, AV_LOG_ERROR, "Dimensions must be an integer multiple of the chroma subsampling\n");
280
        return AVERROR_INVALIDDATA;
281
    }
282
283
    /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
284
70
    if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */
285
        /* [DIRAC_STD] index */
286
70
        idx = dsh->color_spec_index = get_interleaved_ue_golomb(gb);
287
288
70
        if (dsh->color_spec_index > 4U)
289
            return AVERROR_INVALIDDATA;
290
291
70
        dsh->color_primaries = dirac_color_presets[idx].color_primaries;
292
70
        dsh->colorspace      = dirac_color_presets[idx].colorspace;
293
70
        dsh->color_trc       = dirac_color_presets[idx].color_trc;
294
295
70
        if (!dsh->color_spec_index) {
296
            /* [DIRAC_STD] 10.3.9.1 Colour primaries */
297
66
            if (get_bits1(gb)) {
298
66
                idx = get_interleaved_ue_golomb(gb);
299
66
                if (idx < 3U)
300
66
                    dsh->color_primaries = dirac_primaries[idx];
301
            }
302
            /* [DIRAC_STD] 10.3.9.2 Colour matrix */
303
66
            if (get_bits1(gb)) {
304
66
                idx = get_interleaved_ue_golomb(gb);
305
66
                if (!idx)
306
66
                    dsh->colorspace = AVCOL_SPC_BT709;
307
                else if (idx == 1)
308
                    dsh->colorspace = AVCOL_SPC_BT470BG;
309
            }
310
            /* [DIRAC_STD] 10.3.9.3 Transfer function */
311

66
            if (get_bits1(gb) && !get_interleaved_ue_golomb(gb))
312
66
                dsh->color_trc = AVCOL_TRC_BT709;
313
        }
314
    } else {
315
        idx                    = dsh->color_spec_index;
316
        dsh->color_primaries = dirac_color_presets[idx].color_primaries;
317
        dsh->colorspace      = dirac_color_presets[idx].colorspace;
318
        dsh->color_trc       = dirac_color_presets[idx].color_trc;
319
    }
320
321
70
    return 0;
322
}
323
324
/* [DIRAC_STD] 10. Sequence Header. sequence_header() */
325
70
int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh,
326
                                   const uint8_t *buf, size_t buf_size,
327
                                   void *log_ctx)
328
{
329
    AVDiracSeqHeader *dsh;
330
    GetBitContext gb;
331
    unsigned video_format, picture_coding_mode;
332
    int ret;
333
334
70
    dsh = av_mallocz(sizeof(*dsh));
335
70
    if (!dsh)
336
        return AVERROR(ENOMEM);
337
338
70
    ret = init_get_bits8(&gb, buf, buf_size);
339
70
    if (ret < 0)
340
        goto fail;
341
342
    /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
343
70
    dsh->version.major = get_interleaved_ue_golomb(&gb);
344
70
    dsh->version.minor = get_interleaved_ue_golomb(&gb);
345
70
    dsh->profile   = get_interleaved_ue_golomb(&gb);
346
70
    dsh->level     = get_interleaved_ue_golomb(&gb);
347
    /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
348
     * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
349
70
    video_format = get_interleaved_ue_golomb(&gb);
350
351

70
    if (dsh->version.major < 2 && log_ctx)
352
        av_log(log_ctx, AV_LOG_WARNING, "Stream is old and may not work\n");
353

70
    else if (dsh->version.major > 2 && log_ctx)
354
        av_log(log_ctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
355
356
70
    if (video_format > 20U) {
357
        ret = AVERROR_INVALIDDATA;
358
        goto fail;
359
    }
360
361
    /* Fill in defaults for the source parameters. */
362
70
    dsh->width              = dirac_source_parameters_defaults[video_format].width;
363
70
    dsh->height             = dirac_source_parameters_defaults[video_format].height;
364
70
    dsh->chroma_format      = dirac_source_parameters_defaults[video_format].chroma_format;
365
70
    dsh->interlaced         = dirac_source_parameters_defaults[video_format].interlaced;
366
70
    dsh->top_field_first    = dirac_source_parameters_defaults[video_format].top_field_first;
367
70
    dsh->frame_rate_index   = dirac_source_parameters_defaults[video_format].frame_rate_index;
368
70
    dsh->aspect_ratio_index = dirac_source_parameters_defaults[video_format].aspect_ratio_index;
369
70
    dsh->clean_width        = dirac_source_parameters_defaults[video_format].clean_width;
370
70
    dsh->clean_height       = dirac_source_parameters_defaults[video_format].clean_height;
371
70
    dsh->clean_left_offset  = dirac_source_parameters_defaults[video_format].clean_left_offset;
372
70
    dsh->clean_right_offset = dirac_source_parameters_defaults[video_format].clean_right_offset;
373
70
    dsh->pixel_range_index  = dirac_source_parameters_defaults[video_format].pixel_range_index;
374
70
    dsh->color_spec_index   = dirac_source_parameters_defaults[video_format].color_spec_index;
375
376
    /* [DIRAC_STD] 10.3 Source Parameters
377
     * Override the defaults. */
378
70
    ret = parse_source_parameters(dsh, &gb, log_ctx);
379
70
    if (ret < 0)
380
        goto fail;
381
382
    /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
383
     * currently only used to signal field coding */
384
70
    picture_coding_mode = get_interleaved_ue_golomb(&gb);
385
70
    if (picture_coding_mode != 0) {
386
        if (log_ctx) {
387
            av_log(log_ctx, AV_LOG_ERROR, "Unsupported picture coding mode %d",
388
                   picture_coding_mode);
389
        }
390
        ret = AVERROR_INVALIDDATA;
391
        goto fail;
392
    }
393
394
70
    *pdsh = dsh;
395
70
    return 0;
396
fail:
397
    av_freep(&dsh);
398
    *pdsh = NULL;
399
    return ret;
400
}
401
#else
402
int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh,
403
                                   const uint8_t *buf, size_t buf_size,
404
                                   void *log_ctx)
405
{
406
    return AVERROR(ENOSYS);
407
}
408
#endif