FFmpeg  4.3
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 }
av_buffer_alloc
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:67
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
u
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:262
HEADER
#define HEADER(name)
Definition: cbs_av1.c:536
rw
FFmpeg Automated Testing Environment ************************************Introduction Using FATE from your FFmpeg source directory Submitting the results to the FFmpeg result aggregation server Uploading new samples to the fate suite FATE makefile targets and variables Makefile targets Makefile variables Examples Introduction **************FATE is an extended regression suite on the client side and a means for results aggregation and presentation on the server side The first part of this document explains how you can use FATE from your FFmpeg source directory to test your ffmpeg binary The second part describes how you can run FATE to submit the results to FFmpeg’s FATE server In any way you can have a look at the publicly viewable FATE results by visiting this as it can be seen if some test on some platform broke with their recent contribution This usually happens on the platforms the developers could not test on The second part of this document describes how you can run FATE to submit your results to FFmpeg’s FATE server If you want to submit your results be sure to check that your combination of OS and compiler is not already listed on the above mentioned website In the third part you can find a comprehensive listing of FATE makefile targets and variables Using FATE from your FFmpeg source directory **********************************************If you want to run FATE on your machine you need to have the samples in place You can get the samples via the build target fate rsync Use this command from the top level source this will cause FATE to fail NOTE To use a custom wrapper to run the pass ‘ target exec’ to ‘configure’ or set the TARGET_EXEC Make variable Submitting the results to the FFmpeg result aggregation server ****************************************************************To submit your results to the server you should run fate through the shell script ‘tests fate sh’ from the FFmpeg sources This script needs to be invoked with a configuration file as its first argument tests fate sh path to fate_config A configuration file template with comments describing the individual configuration variables can be found at ‘doc fate_config sh template’ Create a configuration that suits your based on the configuration template The ‘slot’ configuration variable can be any string that is not yet but it is suggested that you name it adhering to the following pattern ‘ARCH OS COMPILER COMPILER VERSION’ The configuration file itself will be sourced in a shell therefore all shell features may be used This enables you to setup the environment as you need it for your build For your first test runs the ‘fate_recv’ variable should be empty or commented out This will run everything as normal except that it will omit the submission of the results to the server The following files should be present in $workdir as specified in the configuration it may help to try out the ‘ssh’ command with one or more ‘ v’ options You should get detailed output concerning your SSH configuration and the authentication process The only thing left is to automate the execution of the fate sh script and the synchronisation of the samples directory Uploading new samples to the fate suite *****************************************If you need a sample uploaded send a mail to samples request This is for developers who have an account on the fate suite server If you upload new please make sure they are as small as space on each network bandwidth and so on benefit from smaller test cases Also keep in mind older checkouts use existing sample that means in practice generally do not remove or overwrite files as it likely would break older checkouts or releases Also all needed samples for a commit should be ideally before the push If you need an account for frequently uploading samples or you wish to help others by doing that send a mail to ffmpeg devel rsync vauL Duo ug rw
Definition: fate.txt:150
CodedBitstreamContext
Context structure for coded bitstream operations.
Definition: cbs.h:168
application_data
static int FUNC() application_data(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawApplicationData *current)
Definition: cbs_jpeg_syntax_template.c:150
JPEG_MAX_HEIGHT
@ JPEG_MAX_HEIGHT
Definition: cbs_jpeg.h:48
JPEGRawQuantisationTable
Definition: cbs_jpeg.h:87
CHECK
CHECK(-1) CHECK(-2) }} }} CHECK(1) CHECK(2) }} }} } if(diff0+diff1 > 0) temp -
JPEG_MAX_WIDTH
@ JPEG_MAX_WIDTH
Definition: cbs_jpeg.h:49
X
@ X
Definition: vf_addroi.c:26
JPEGRawQuantisationTableSpecification
Definition: cbs_jpeg.h:93
us
#define us(width, name, range_min, range_max, subs,...)
Definition: cbs_h2645.c:276
C
s EdgeDetect Foobar g libavfilter vf_edgedetect c libavfilter vf_foobar c edit libavfilter and add an entry for foobar following the pattern of the other filters edit libavfilter allfilters and add an entry for foobar following the pattern of the other filters configure make j< whatever > ffmpeg ffmpeg i you should get a foobar png with Lena edge detected That s your new playground is ready Some little details about what s going which in turn will define variables for the build system and the C
Definition: writing_filters.txt:58
scan_header
static int FUNC() scan_header(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawScanHeader *current)
Definition: cbs_jpeg_syntax_template.c:126
ctx
AVFormatContext * ctx
Definition: movenc.c:48
V
#define V
Definition: avdct.c:30
huffman_table
static int FUNC() huffman_table(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawHuffmanTable *current)
Definition: cbs_jpeg_syntax_template.c:78
quantisation_table
static int FUNC() quantisation_table(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawQuantisationTable *current)
Definition: cbs_jpeg_syntax_template.c:43
JPEGRawHuffmanTableSpecification
Definition: cbs_jpeg.h:105
P
#define P
H
#define H
Definition: pixlet.c:39
Y
#define Y
Definition: boxblur.h:38
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
JPEG_MAX_COMPONENTS
@ JPEG_MAX_COMPONENTS
Definition: cbs_jpeg.h:46
JPEGRawApplicationData
Definition: cbs_jpeg.h:110
comment
static int FUNC() comment(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawComment *current)
Definition: cbs_jpeg_syntax_template.c:174
dht
static int FUNC() dht(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawHuffmanTableSpecification *current)
Definition: cbs_jpeg_syntax_template.c:102
L
#define L(x)
Definition: vp56_arith.h:36
frame_header
Definition: truemotion1.c:87
FUNC
#define FUNC(a)
Definition: bit_depth_template.c:104
dqt
static int FUNC() dqt(CodedBitstreamContext *ctx, RWContext *rw, JPEGRawQuantisationTableSpecification *current)
Definition: cbs_jpeg_syntax_template.c:62
JPEGRawFrameHeader
Definition: cbs_jpeg.h:53
JPEGRawComment
Definition: cbs_jpeg.h:116
JPEGRawHuffmanTable
Definition: cbs_jpeg.h:98
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
RWContext
#define RWContext
Definition: cbs_av1.c:665
JPEGRawScanHeader
Definition: cbs_jpeg.h:66