FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/ffv1_parse.c
Date: 2025-02-21 03:01:52
Exec Total Coverage
Lines: 151 279 54.1%
Functions: 4 4 100.0%
Branches: 116 292 39.7%
Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include "libavutil/crc.h"
20 #include "libavutil/mem.h"
21 #include "libavutil/pixdesc.h"
22 #include "rangecoder.h"
23 #include "ffv1.h"
24
25 1550 static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
26 {
27 int v;
28 1550 int i = 0;
29 uint8_t state[CONTEXT_SIZE];
30
31 1550 memset(state, 128, sizeof(state));
32
33
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 7625 for (v = 0; i < 128; v++) {
34 6075 unsigned len = ff_ffv1_get_symbol(c, state, 0) + 1U;
35
36
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 6075 if (len > 128 - i || !len)
37 ✗ return AVERROR_INVALIDDATA;
38
39
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 204475 while (len--) {
40 198400 quant_table[i] = scale * v;
41 198400 i++;
42 }
43 }
44
45
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 198400 for (i = 1; i < 128; i++)
46 196850 quant_table[256 - i] = -quant_table[i];
47 1550 quant_table[128] = -quant_table[127];
48
49 1550 return 2 * v - 1;
50 }
51
52 310 int ff_ffv1_read_quant_tables(RangeCoder *c,
53 int16_t quant_table[MAX_CONTEXT_INPUTS][256])
54 {
55 int i;
56 310 int context_count = 1;
57
58
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 1860 for (i = 0; i < 5; i++) {
59 1550 int ret = read_quant_table(c, quant_table[i], context_count);
60
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 1550 if (ret < 0)
61 ✗ return ret;
62 1550 context_count *= ret;
63
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 1550 if (context_count > 32768U) {
64 ✗ return AVERROR_INVALIDDATA;
65 }
66 }
67 310 return (context_count + 1) / 2;
68 }
69
70 140 int ff_ffv1_read_extra_header(FFV1Context *f)
71 {
72 RangeCoder c;
73 uint8_t state[CONTEXT_SIZE];
74 int ret;
75 uint8_t state2[32][CONTEXT_SIZE];
76 140 unsigned crc = 0;
77
78 140 memset(state2, 128, sizeof(state2));
79 140 memset(state, 128, sizeof(state));
80
81 140 ff_init_range_decoder(&c, f->avctx->extradata, f->avctx->extradata_size);
82 140 ff_build_rac_states(&c, 0.05 * (1LL << 32), 256 - 8);
83
84 140 f->version = ff_ffv1_get_symbol(&c, state, 0);
85
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 140 if (f->version < 2) {
86 ✗ av_log(f->avctx, AV_LOG_ERROR, "Invalid version in global header\n");
87 ✗ return AVERROR_INVALIDDATA;
88 }
89
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 140 if (f->version > 4) {
90 ✗ av_log(f->avctx, AV_LOG_ERROR, "unsupported version %d\n",
91 f->version);
92 ✗ return AVERROR_PATCHWELCOME;
93 }
94 140 f->combined_version = f->version << 16;
95
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 140 if (f->version > 2) {
96 128 c.bytestream_end -= 4;
97 128 f->micro_version = ff_ffv1_get_symbol(&c, state, 0);
98
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 128 if (f->micro_version < 0 || f->micro_version > 65535)
99 ✗ return AVERROR_INVALIDDATA;
100 128 f->combined_version += f->micro_version;
101 }
102 140 f->ac = ff_ffv1_get_symbol(&c, state, 0);
103
104
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 140 if (f->ac == AC_RANGE_CUSTOM_TAB) {
105
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 16640 for (int i = 1; i < 256; i++)
106 16575 f->state_transition[i] = ff_ffv1_get_symbol(&c, state, 1) + c.one_state[i];
107 } else {
108 RangeCoder rc;
109 75 ff_build_rac_states(&rc, 0.05 * (1LL << 32), 256 - 8);
110
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 19200 for (int i = 1; i < 256; i++)
111 19125 f->state_transition[i] = rc.one_state[i];
112 }
113
114 140 f->colorspace = ff_ffv1_get_symbol(&c, state, 0); //YUV cs type
115 140 f->avctx->bits_per_raw_sample = ff_ffv1_get_symbol(&c, state, 0);
116 140 f->chroma_planes = get_rac(&c, state);
117 140 f->chroma_h_shift = ff_ffv1_get_symbol(&c, state, 0);
118 140 f->chroma_v_shift = ff_ffv1_get_symbol(&c, state, 0);
119 140 f->transparency = get_rac(&c, state);
120
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 140 f->plane_count = 1 + (f->chroma_planes || f->version<4) + f->transparency;
121 140 f->num_h_slices = 1 + ff_ffv1_get_symbol(&c, state, 0);
122 140 f->num_v_slices = 1 + ff_ffv1_get_symbol(&c, state, 0);
123
124
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 140 if (f->chroma_h_shift > 4U || f->chroma_v_shift > 4U) {
125 ✗ av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
126 f->chroma_h_shift, f->chroma_v_shift);
127 ✗ return AVERROR_INVALIDDATA;
128 }
129
130
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 140 if (f->num_h_slices > (unsigned)f->width || !f->num_h_slices ||
131
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 140 f->num_v_slices > (unsigned)f->height || !f->num_v_slices
132 ) {
133 ✗ av_log(f->avctx, AV_LOG_ERROR, "slice count invalid\n");
134 ✗ return AVERROR_INVALIDDATA;
135 }
136
137
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 140 if (f->num_h_slices > MAX_SLICES / f->num_v_slices) {
138 ✗ av_log(f->avctx, AV_LOG_ERROR, "slice count unsupported\n");
139 ✗ return AVERROR_PATCHWELCOME;
140 }
141
142 140 f->quant_table_count = ff_ffv1_get_symbol(&c, state, 0);
143
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 140 if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES || !f->quant_table_count) {
144 ✗ av_log(f->avctx, AV_LOG_ERROR, "quant table count %d is invalid\n", f->quant_table_count);
145 ✗ f->quant_table_count = 0;
146 ✗ return AVERROR_INVALIDDATA;
147 }
148
149
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 420 for (int i = 0; i < f->quant_table_count; i++) {
150 280 f->context_count[i] = ff_ffv1_read_quant_tables(&c, f->quant_tables[i]);
151
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 280 if (f->context_count[i] < 0) {
152 ✗ av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
153 ✗ return AVERROR_INVALIDDATA;
154 }
155 }
156
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 140 if ((ret = ff_ffv1_allocate_initial_states(f)) < 0)
157 ✗ return ret;
158
159
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 420 for (int i = 0; i < f->quant_table_count; i++)
160
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 280 if (get_rac(&c, state)) {
161
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 151536 for (int j = 0; j < f->context_count[i]; j++)
162
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 4999896 for (int k = 0; k < CONTEXT_SIZE; k++) {
163
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 4848384 int pred = j ? f->initial_states[i][j - 1][k] : 128;
164 4848384 f->initial_states[i][j][k] =
165 4848384 (pred + ff_ffv1_get_symbol(&c, state2[k], 1)) & 0xFF;
166 }
167 }
168
169
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 140 if (f->version > 2) {
170 128 f->ec = ff_ffv1_get_symbol(&c, state, 0);
171
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 128 if (f->ec >= 2)
172 ✗ f->crcref = 0x7a8c4079;
173
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 128 if (f->combined_version >= 0x30003)
174 128 f->intra = ff_ffv1_get_symbol(&c, state, 0);
175 }
176
177
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 140 if (f->version > 2) {
178 unsigned v;
179 256 v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), f->crcref,
180 128 f->avctx->extradata, f->avctx->extradata_size);
181
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 128 if (v != f->crcref || f->avctx->extradata_size < 4) {
182 ✗ av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);
183 ✗ return AVERROR_INVALIDDATA;
184 }
185 128 crc = AV_RB32(f->avctx->extradata + f->avctx->extradata_size - 4);
186 }
187
188
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 140 if (f->avctx->debug & FF_DEBUG_PICT_INFO)
189 ✗ av_log(f->avctx, AV_LOG_DEBUG,
190 "global: ver:%d.%d, coder:%d, colorspace: %d bpr:%d chroma:%d(%d:%d), alpha:%d slices:%dx%d qtabs:%d ec:%d intra:%d CRC:0x%08X\n",
191 f->version, f->micro_version,
192 f->ac,
193 f->colorspace,
194 ✗ f->avctx->bits_per_raw_sample,
195 f->chroma_planes, f->chroma_h_shift, f->chroma_v_shift,
196 f->transparency,
197 f->num_h_slices, f->num_v_slices,
198 f->quant_table_count,
199 f->ec,
200 f->intra,
201 crc
202 );
203 140 return 0;
204 }
205
206 478 int ff_ffv1_parse_header(FFV1Context *f, RangeCoder *c, uint8_t *state)
207 {
208
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 478 if (f->version < 2) {
209 int chroma_planes, chroma_h_shift, chroma_v_shift, transparency, colorspace, bits_per_raw_sample;
210 50 unsigned v= ff_ffv1_get_symbol(c, state, 0);
211
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 50 if (v >= 2) {
212 ✗ av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);
213 ✗ return AVERROR_INVALIDDATA;
214 }
215 50 f->version = v;
216 50 f->ac = ff_ffv1_get_symbol(c, state, 0);
217
218
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 50 if (f->ac == AC_RANGE_CUSTOM_TAB) {
219 ✗ for (int i = 1; i < 256; i++) {
220 ✗ int st = ff_ffv1_get_symbol(c, state, 1) + c->one_state[i];
221 ✗ if (st < 1 || st > 255) {
222 ✗ av_log(f->avctx, AV_LOG_ERROR, "invalid state transition %d\n", st);
223 ✗ return AVERROR_INVALIDDATA;
224 }
225 ✗ f->state_transition[i] = st;
226 }
227 } else {
228 RangeCoder rc;
229 50 ff_build_rac_states(&rc, 0.05 * (1LL << 32), 256 - 8);
230
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 12800 for (int i = 1; i < 256; i++)
231 12750 f->state_transition[i] = rc.one_state[i];
232 }
233
234 50 colorspace = ff_ffv1_get_symbol(c, state, 0); //YUV cs type
235
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 50 bits_per_raw_sample = f->version > 0 ? ff_ffv1_get_symbol(c, state, 0) : f->avctx->bits_per_raw_sample;
236 50 chroma_planes = get_rac(c, state);
237 50 chroma_h_shift = ff_ffv1_get_symbol(c, state, 0);
238 50 chroma_v_shift = ff_ffv1_get_symbol(c, state, 0);
239 50 transparency = get_rac(c, state);
240
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 50 if (colorspace == 0 && f->avctx->skip_alpha)
241 ✗ transparency = 0;
242
243
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 50 if (f->plane_count) {
244
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 36 if (colorspace != f->colorspace ||
245
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 36 bits_per_raw_sample != f->avctx->bits_per_raw_sample ||
246
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 36 chroma_planes != f->chroma_planes ||
247
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248
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249
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 36 transparency != f->transparency) {
250 ✗ av_log(f->avctx, AV_LOG_ERROR, "Invalid change of global parameters\n");
251 ✗ return AVERROR_INVALIDDATA;
252 }
253 }
254
255
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 50 if (chroma_h_shift > 4U || chroma_v_shift > 4U) {
256 ✗ av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
257 chroma_h_shift, chroma_v_shift);
258 ✗ return AVERROR_INVALIDDATA;
259 }
260
261 50 f->colorspace = colorspace;
262 50 f->avctx->bits_per_raw_sample = bits_per_raw_sample;
263 50 f->chroma_planes = chroma_planes;
264 50 f->chroma_h_shift = chroma_h_shift;
265 50 f->chroma_v_shift = chroma_v_shift;
266 50 f->transparency = transparency;
267
268 50 f->plane_count = 2 + f->transparency;
269 }
270
271
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 478 if (f->colorspace == 0) {
272
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 390 if (!f->transparency && !f->chroma_planes) {
273 ✗ if (f->avctx->bits_per_raw_sample <= 8)
274 ✗ f->pix_fmt = AV_PIX_FMT_GRAY8;
275 ✗ else if (f->avctx->bits_per_raw_sample == 9) {
276 ✗ f->packed_at_lsb = 1;
277 ✗ f->pix_fmt = AV_PIX_FMT_GRAY9;
278 ✗ } else if (f->avctx->bits_per_raw_sample == 10) {
279 ✗ f->packed_at_lsb = 1;
280 ✗ f->pix_fmt = AV_PIX_FMT_GRAY10;
281 ✗ } else if (f->avctx->bits_per_raw_sample == 12) {
282 ✗ f->packed_at_lsb = 1;
283 ✗ f->pix_fmt = AV_PIX_FMT_GRAY12;
284 ✗ } else if (f->avctx->bits_per_raw_sample == 14) {
285 ✗ f->packed_at_lsb = 1;
286 ✗ f->pix_fmt = AV_PIX_FMT_GRAY14;
287 ✗ } else if (f->avctx->bits_per_raw_sample == 16) {
288 ✗ f->packed_at_lsb = 1;
289 ✗ f->pix_fmt = AV_PIX_FMT_GRAY16;
290 ✗ } else if (f->avctx->bits_per_raw_sample < 16) {
291 ✗ f->pix_fmt = AV_PIX_FMT_GRAY16;
292 } else
293 ✗ return AVERROR(ENOSYS);
294
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 390 } else if (f->transparency && !f->chroma_planes) {
295 ✗ if (f->avctx->bits_per_raw_sample <= 8)
296 ✗ f->pix_fmt = AV_PIX_FMT_YA8;
297 else
298 ✗ return AVERROR(ENOSYS);
299
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 390 } else if (f->avctx->bits_per_raw_sample<=8 && !f->transparency) {
300
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 254 switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
301 ✗ case 0x00: f->pix_fmt = AV_PIX_FMT_YUV444P; break;
302 ✗ case 0x01: f->pix_fmt = AV_PIX_FMT_YUV440P; break;
303 ✗ case 0x10: f->pix_fmt = AV_PIX_FMT_YUV422P; break;
304 254 case 0x11: f->pix_fmt = AV_PIX_FMT_YUV420P; break;
305 ✗ case 0x20: f->pix_fmt = AV_PIX_FMT_YUV411P; break;
306 ✗ case 0x22: f->pix_fmt = AV_PIX_FMT_YUV410P; break;
307 }
308
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 136 } else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency) {
309 ✗ switch(16*f->chroma_h_shift + f->chroma_v_shift) {
310 ✗ case 0x00: f->pix_fmt = AV_PIX_FMT_YUVA444P; break;
311 ✗ case 0x10: f->pix_fmt = AV_PIX_FMT_YUVA422P; break;
312 ✗ case 0x11: f->pix_fmt = AV_PIX_FMT_YUVA420P; break;
313 }
314
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 136 } else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency) {
315 ✗ f->packed_at_lsb = 1;
316 ✗ switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
317 ✗ case 0x00: f->pix_fmt = AV_PIX_FMT_YUV444P9; break;
318 ✗ case 0x10: f->pix_fmt = AV_PIX_FMT_YUV422P9; break;
319 ✗ case 0x11: f->pix_fmt = AV_PIX_FMT_YUV420P9; break;
320 }
321
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 136 } else if (f->avctx->bits_per_raw_sample == 9 && f->transparency) {
322 ✗ f->packed_at_lsb = 1;
323 ✗ switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
324 ✗ case 0x00: f->pix_fmt = AV_PIX_FMT_YUVA444P9; break;
325 ✗ case 0x10: f->pix_fmt = AV_PIX_FMT_YUVA422P9; break;
326 ✗ case 0x11: f->pix_fmt = AV_PIX_FMT_YUVA420P9; break;
327 }
328
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 136 } else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency) {
329 92 f->packed_at_lsb = 1;
330
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 92 switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
331 ✗ case 0x00: f->pix_fmt = AV_PIX_FMT_YUV444P10; break;
332 ✗ case 0x01: f->pix_fmt = AV_PIX_FMT_YUV440P10; break;
333 92 case 0x10: f->pix_fmt = AV_PIX_FMT_YUV422P10; break;
334 ✗ case 0x11: f->pix_fmt = AV_PIX_FMT_YUV420P10; break;
335 }
336
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 44 } else if (f->avctx->bits_per_raw_sample == 10 && f->transparency) {
337 ✗ f->packed_at_lsb = 1;
338 ✗ switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
339 ✗ case 0x00: f->pix_fmt = AV_PIX_FMT_YUVA444P10; break;
340 ✗ case 0x10: f->pix_fmt = AV_PIX_FMT_YUVA422P10; break;
341 ✗ case 0x11: f->pix_fmt = AV_PIX_FMT_YUVA420P10; break;
342 }
343
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 44 } else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency) {
344 ✗ f->packed_at_lsb = 1;
345 ✗ switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
346 ✗ case 0x00: f->pix_fmt = AV_PIX_FMT_YUV444P12; break;
347 ✗ case 0x01: f->pix_fmt = AV_PIX_FMT_YUV440P12; break;
348 ✗ case 0x10: f->pix_fmt = AV_PIX_FMT_YUV422P12; break;
349 ✗ case 0x11: f->pix_fmt = AV_PIX_FMT_YUV420P12; break;
350 }
351
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 44 } else if (f->avctx->bits_per_raw_sample == 12 && f->transparency) {
352 ✗ f->packed_at_lsb = 1;
353 ✗ switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
354 ✗ case 0x00: f->pix_fmt = AV_PIX_FMT_YUVA444P12; break;
355 ✗ case 0x10: f->pix_fmt = AV_PIX_FMT_YUVA422P12; break;
356 }
357
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 44 } else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency) {
358 ✗ f->packed_at_lsb = 1;
359 ✗ switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
360 ✗ case 0x00: f->pix_fmt = AV_PIX_FMT_YUV444P14; break;
361 ✗ case 0x10: f->pix_fmt = AV_PIX_FMT_YUV422P14; break;
362 ✗ case 0x11: f->pix_fmt = AV_PIX_FMT_YUV420P14; break;
363 }
364
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 44 } else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency){
365 44 f->packed_at_lsb = 1;
366
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 44 switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
367 44 case 0x00: f->pix_fmt = AV_PIX_FMT_YUV444P16; break;
368 ✗ case 0x10: f->pix_fmt = AV_PIX_FMT_YUV422P16; break;
369 ✗ case 0x11: f->pix_fmt = AV_PIX_FMT_YUV420P16; break;
370 }
371 ✗ } else if (f->avctx->bits_per_raw_sample == 16 && f->transparency){
372 ✗ f->packed_at_lsb = 1;
373 ✗ switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
374 ✗ case 0x00: f->pix_fmt = AV_PIX_FMT_YUVA444P16; break;
375 ✗ case 0x10: f->pix_fmt = AV_PIX_FMT_YUVA422P16; break;
376 ✗ case 0x11: f->pix_fmt = AV_PIX_FMT_YUVA420P16; break;
377 }
378 }
379
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 88 } else if (f->colorspace == 1) {
380
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 88 if (f->chroma_h_shift || f->chroma_v_shift) {
381 ✗ av_log(f->avctx, AV_LOG_ERROR,
382 "chroma subsampling not supported in this colorspace\n");
383 ✗ return AVERROR(ENOSYS);
384 }
385
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 88 if ( f->avctx->bits_per_raw_sample <= 8 && !f->transparency)
386 44 f->pix_fmt = AV_PIX_FMT_0RGB32;
387
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 44 else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency)
388 ✗ f->pix_fmt = AV_PIX_FMT_RGB32;
389
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 44 else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency)
390 ✗ f->pix_fmt = AV_PIX_FMT_GBRP9;
391
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 44 else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency)
392 ✗ f->pix_fmt = AV_PIX_FMT_GBRP10;
393
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 44 else if (f->avctx->bits_per_raw_sample == 10 && f->transparency)
394 ✗ f->pix_fmt = AV_PIX_FMT_GBRAP10;
395
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 44 else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency)
396 ✗ f->pix_fmt = AV_PIX_FMT_GBRP12;
397
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 44 else if (f->avctx->bits_per_raw_sample == 12 && f->transparency)
398 ✗ f->pix_fmt = AV_PIX_FMT_GBRAP12;
399
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 44 else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency)
400 ✗ f->pix_fmt = AV_PIX_FMT_GBRP14;
401
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 44 else if (f->avctx->bits_per_raw_sample == 14 && f->transparency)
402 ✗ f->pix_fmt = AV_PIX_FMT_GBRAP14;
403
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 44 else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency) {
404 44 f->pix_fmt = AV_PIX_FMT_GBRP16;
405 44 f->use32bit = 1;
406 ✗ } else if (f->avctx->bits_per_raw_sample == 16 && f->transparency) {
407 ✗ f->pix_fmt = AV_PIX_FMT_GBRAP16;
408 ✗ f->use32bit = 1;
409 }
410 } else {
411 ✗ av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
412 ✗ return AVERROR(ENOSYS);
413 }
414
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 478 if (f->pix_fmt == AV_PIX_FMT_NONE) {
415 ✗ av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
416 ✗ return AVERROR(ENOSYS);
417 }
418
419 478 return 0;
420 }
421