FFmpeg  4.3.6
cbs_jpeg_syntax_template.c
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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 
20  JPEGRawFrameHeader *current)
21 {
22  int err, i;
23 
24  HEADER("Frame Header");
25 
26  u(16, Lf, 8, 8 + 3 * JPEG_MAX_COMPONENTS);
27 
28  u(8, P, 2, 16);
29  u(16, Y, 0, JPEG_MAX_HEIGHT);
30  u(16, X, 1, JPEG_MAX_WIDTH);
31  u(8, Nf, 1, JPEG_MAX_COMPONENTS);
32 
33  for (i = 0; i < current->Nf; i++) {
34  us(8, C[i], i, 0, JPEG_MAX_COMPONENTS);
35  us(4, H[i], i, 1, 4);
36  us(4, V[i], i, 1, 4);
37  us(8, Tq[i], i, 0, 3);
38  }
39 
40  return 0;
41 }
42 
44  JPEGRawQuantisationTable *current)
45 {
46  int err, i;
47 
48  u(4, Pq, 0, 1);
49  u(4, Tq, 0, 3);
50 
51  if (current->Pq) {
52  for (i = 0; i < 64; i++)
53  us(16, Q[i], i, 1, 255);
54  } else {
55  for (i = 0; i < 64; i++)
56  us(8, Q[i], i, 1, 255);
57  }
58 
59  return 0;
60 }
61 
64 {
65  int err, i, n;
66 
67  HEADER("Quantisation Tables");
68 
69  u(16, Lq, 2, 2 + 4 * 65);
70  n = current->Lq / 65;
71 
72  for (i = 0; i < n; i++)
73  CHECK(FUNC(quantisation_table)(ctx, rw, &current->table[i]));
74 
75  return 0;
76 }
77 
79  JPEGRawHuffmanTable *current)
80 {
81  int err, i, j, ij;
82 
83  u(4, Tc, 0, 1);
84  u(4, Th, 0, 3);
85 
86  for (i = 0; i < 16; i++)
87  us(8, L[i], i, 0, 224);
88 
89  ij = 0;
90  for (i = 0; i < 16; i++) {
91  for (j = 0; j < current->L[i]; j++) {
92  if (ij >= 224)
93  return AVERROR_INVALIDDATA;
94  us(8, V[ij], ij, 0, 255);
95  ++ij;
96  }
97  }
98 
99  return 0;
100 }
101 
104 {
105  int err, i, j, n;
106 
107  HEADER("Huffman Tables");
108 
109  u(16, Lh, 2, 2 + 8 * (1 + 16 + 256));
110 
111  n = 2;
112  for (i = 0; n < current->Lh; i++) {
113  if (i >= 8)
114  return AVERROR_INVALIDDATA;
115 
116  CHECK(FUNC(huffman_table)(ctx, rw, &current->table[i]));
117 
118  ++n;
119  for (j = 0; j < 16; j++)
120  n += 1 + current->table[i].L[j];
121  }
122 
123  return 0;
124 }
125 
127  JPEGRawScanHeader *current)
128 {
129  int err, j;
130 
131  HEADER("Scan");
132 
133  u(16, Ls, 6, 6 + 2 * JPEG_MAX_COMPONENTS);
134 
135  u(8, Ns, 1, 4);
136  for (j = 0; j < current->Ns; j++) {
137  us(8, Cs[j], j, 0, JPEG_MAX_COMPONENTS);
138  us(4, Td[j], j, 0, 3);
139  us(4, Ta[j], j, 0, 3);
140  }
141 
142  u(8, Ss, 0, 63);
143  u(8, Se, 0, 63);
144  u(4, Ah, 0, 13);
145  u(4, Al, 0, 15);
146 
147  return 0;
148 }
149 
151  JPEGRawApplicationData *current)
152 {
153  int err, i;
154 
155  HEADER("Application Data");
156 
157  u(16, Lp, 2, 65535);
158 
159  if (current->Lp > 2) {
160 #ifdef READ
161  current->Ap_ref = av_buffer_alloc(current->Lp - 2);
162  if (!current->Ap_ref)
163  return AVERROR(ENOMEM);
164  current->Ap = current->Ap_ref->data;
165 #endif
166 
167  for (i = 0; i < current->Lp - 2; i++)
168  us(8, Ap[i], i, 0, 255);
169  }
170 
171  return 0;
172 }
173 
175  JPEGRawComment *current)
176 {
177  int err, i;
178 
179  HEADER("Comment");
180 
181  u(16, Lc, 2, 65535);
182 
183  if (current->Lc > 2) {
184 #ifdef READ
185  current->Cm_ref = av_buffer_alloc(current->Lc - 2);
186  if (!current->Cm_ref)
187  return AVERROR(ENOMEM);
188  current->Cm = current->Cm_ref->data;
189 #endif
190 
191  for (i = 0; i < current->Lc - 2; i++)
192  us(8, Cm[i], i, 0, 255);
193  }
194 
195  return 0;
196 }
#define P
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int FUNC() dqt(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawQuantisationTableSpecification *current)
#define C
#define RWContext
Definition: cbs_av1.c:666
#define us(width, name, range_min, range_max, subs,...)
Definition: cbs_h2645.c:276
Definition: vf_addroi.c:26
#define HEADER(name)
Definition: cbs_av1.c:537
static int FUNC() huffman_table(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawHuffmanTable *current)
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:262
static int FUNC() scan_header(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawScanHeader *current)
Definition: vf_addroi.c:26
static int FUNC() dht(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawHuffmanTableSpecification *current)
static int FUNC() comment(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawComment *current)
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define FUNC(a)
#define AVERROR(e)
Definition: error.h:43
#define Y
Definition: boxblur.h:38
AVFormatContext * ctx
Definition: movenc.c:48
#define L(x)
Definition: vp56_arith.h:36
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:67
Context structure for coded bitstream operations.
Definition: cbs.h:168
CHECK(-1) CHECK(-2) }} }} CHECK(1) CHECK(2) }} }} } if(diff0+diff1 > 0) temp -
static int FUNC() application_data(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawApplicationData *current)
static int FUNC() quantisation_table(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawQuantisationTable *current)
#define V
Definition: avdct.c:30