FFmpeg
uncodedframecrcenc.c
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1 /*
2 * Copyright (c) 2013 Nicolas George
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20 
21 #include "libavutil/adler32.h"
22 #include "libavutil/avassert.h"
23 #include "libavutil/bprint.h"
24 #include "libavutil/imgutils.h"
25 #include "libavutil/pixdesc.h"
26 #include "avformat.h"
27 #include "internal.h"
28 
29 /* Identical to Adler32 when the type is uint8_t. */
30 #define DEFINE_CKSUM_LINE(name, type, conv) \
31 static void cksum_line_ ## name(unsigned *cksum, void *data, unsigned size) \
32 { \
33  type *p = data; \
34  unsigned a = *cksum & 0xFFFF, b = *cksum >> 16; \
35  for (; size > 0; size--, p++) { \
36  a = (a + (unsigned)(conv)) % 65521; \
37  b = (b + a) % 65521; \
38  } \
39  *cksum = a | (b << 16); \
40 }
41 
43 DEFINE_CKSUM_LINE(s16, int16_t, *p + 0x8000)
44 DEFINE_CKSUM_LINE(s32, int32_t, *p + 0x80000000)
45 DEFINE_CKSUM_LINE(flt, float, *p * 0x80000000 + 0x80000000)
46 DEFINE_CKSUM_LINE(dbl, double, *p * 0x80000000 + 0x80000000)
47 
48 static void video_frame_cksum(AVBPrint *bp, AVFrame *frame)
49 {
50  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
51  int i, y;
52  uint8_t *data;
53  int linesize[5] = { 0 };
54 
55  av_bprintf(bp, ", %d x %d", frame->width, frame->height);
56  if (!desc) {
57  av_bprintf(bp, ", unknown");
58  return;
59  }
60  if (av_image_fill_linesizes(linesize, frame->format, frame->width) < 0)
61  return;
62  av_bprintf(bp, ", %s", desc->name);
63  for (i = 0; linesize[i]; i++) {
64  unsigned cksum = 0;
65  int h = frame->height;
66  if ((i == 1 || i == 2) && desc->nb_components >= 3)
67  h = AV_CEIL_RSHIFT(h, desc->log2_chroma_h);
68  data = frame->data[i];
69  for (y = 0; y < h; y++) {
70  cksum = av_adler32_update(cksum, data, linesize[i]);
71  data += frame->linesize[i];
72  }
73  av_bprintf(bp, ", 0x%08x", cksum);
74  }
75 }
76 
77 static void audio_frame_cksum(AVBPrint *bp, AVFrame *frame)
78 {
79  int nb_planes, nb_samples, p;
80  const char *name;
81 
82  nb_planes = frame->channels;
83  nb_samples = frame->nb_samples;
84  if (!av_sample_fmt_is_planar(frame->format)) {
85  nb_samples *= nb_planes;
86  nb_planes = 1;
87  }
88  name = av_get_sample_fmt_name(frame->format);
89  av_bprintf(bp, ", %d samples", frame->nb_samples);
90  av_bprintf(bp, ", %s", name ? name : "unknown");
91  for (p = 0; p < nb_planes; p++) {
92  uint32_t cksum = 0;
93  void *d = frame->extended_data[p];
94  switch (frame->format) {
95  case AV_SAMPLE_FMT_U8:
96  case AV_SAMPLE_FMT_U8P:
97  cksum_line_u8(&cksum, d, nb_samples);
98  break;
99  case AV_SAMPLE_FMT_S16:
100  case AV_SAMPLE_FMT_S16P:
101  cksum_line_s16(&cksum, d, nb_samples);
102  break;
103  case AV_SAMPLE_FMT_S32:
104  case AV_SAMPLE_FMT_S32P:
105  cksum_line_s32(&cksum, d, nb_samples);
106  break;
107  case AV_SAMPLE_FMT_FLT:
108  case AV_SAMPLE_FMT_FLTP:
109  cksum_line_flt(&cksum, d, nb_samples);
110  break;
111  case AV_SAMPLE_FMT_DBL:
112  case AV_SAMPLE_FMT_DBLP:
113  cksum_line_dbl(&cksum, d, nb_samples);
114  break;
115  default:
116  av_assert0(!"reached");
117  }
118  av_bprintf(bp, ", 0x%08"PRIx32, cksum);
119  }
120 }
121 
122 static int write_header(struct AVFormatContext *s)
123 {
124  return ff_framehash_write_header(s);
125 }
126 
127 static int write_frame(struct AVFormatContext *s, int stream_index,
128  AVFrame **frame, unsigned flags)
129 {
130  AVBPrint bp;
131  int ret = 0;
132  enum AVMediaType type;
133  const char *type_name;
134 
135  if ((flags & AV_WRITE_UNCODED_FRAME_QUERY))
136  return 0;
137 
139  av_bprintf(&bp, "%d, %10"PRId64"",
140  stream_index, (*frame)->pts);
141  type = s->streams[stream_index]->codecpar->codec_type;
142  type_name = av_get_media_type_string(type);
143  av_bprintf(&bp, ", %s", type_name ? type_name : "unknown");
144  switch (type) {
145  case AVMEDIA_TYPE_VIDEO:
146  video_frame_cksum(&bp, *frame);
147  break;
148  case AVMEDIA_TYPE_AUDIO:
149  audio_frame_cksum(&bp, *frame);
150  break;
151  }
152 
153  av_bprint_chars(&bp, '\n', 1);
154  if (av_bprint_is_complete(&bp))
155  avio_write(s->pb, bp.str, bp.len);
156  else
157  ret = AVERROR(ENOMEM);
158  av_bprint_finalize(&bp, NULL);
159  return ret;
160 }
161 
163 {
164  return AVERROR(ENOSYS);
165 }
166 
168  .name = "uncodedframecrc",
169  .long_name = NULL_IF_CONFIG_SMALL("uncoded framecrc testing"),
170  .audio_codec = AV_CODEC_ID_PCM_S16LE,
171  .video_codec = AV_CODEC_ID_RAWVIDEO,
172  .write_header = write_header,
173  .write_packet = write_packet,
174  .write_uncoded_frame = write_frame,
177 };
float, planar
Definition: samplefmt.h:69
#define NULL
Definition: coverity.c:32
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2522
This structure describes decoded (raw) audio or video data.
Definition: frame.h:268
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
misc image utilities
const char * desc
Definition: nvenc.c:68
static void audio_frame_cksum(AVBPrint *bp, AVFrame *frame)
double, planar
Definition: samplefmt.h:70
GLint GLenum type
Definition: opengl_enc.c:104
static AVPacket pkt
#define AVFMT_TS_NONSTRICT
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition: avformat.h:477
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
Format I/O context.
Definition: avformat.h:1358
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
uint8_t
AV_SAMPLE_FMT_U8
Query whether the feature is possible on this stream.
Definition: internal.h:644
unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf, unsigned int len)
Calculate the Adler32 checksum of a buffer.
Definition: adler32.c:44
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
static int write_packet(struct AVFormatContext *s, AVPacket *pkt)
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218
signed 32 bits
Definition: samplefmt.h:62
const char * name
Definition: pixdesc.h:82
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
Check if the sample format is planar.
Definition: samplefmt.c:112
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:260
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
#define AV_BPRINT_SIZE_UNLIMITED
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
static int write_header(struct AVFormatContext *s)
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3949
simple assert() macros that are a bit more flexible than ISO C assert().
const char * av_get_sample_fmt_name(enum AVSampleFormat sample_fmt)
Return the name of sample_fmt, or NULL if sample_fmt is not recognized.
Definition: samplefmt.c:49
AVOutputFormat ff_uncodedframecrc_muxer
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
int channels
number of audio channels, only used for audio.
Definition: frame.h:573
signed 32 bits, planar
Definition: samplefmt.h:68
#define DEFINE_CKSUM_LINE(name, type, conv)
const char * name
Definition: avformat.h:505
int32_t
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
#define s(width, name)
Definition: cbs_vp9.c:257
static int av_bprint_is_complete(const AVBPrint *buf)
Test if the print buffer is complete (not truncated).
Definition: bprint.h:185
unsigned 8 bits, planar
Definition: samplefmt.h:66
int ff_framehash_write_header(AVFormatContext *s)
Set the timebase for each stream from the corresponding codec timebase and print it.
Definition: framehash.c:23
Public header for Adler-32 hash function implementation.
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:341
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
Definition: imgutils.c:89
static int write_frame(struct AVFormatContext *s, int stream_index, AVFrame **frame, unsigned flags)
AVMediaType
Definition: avutil.h:199
static void video_frame_cksum(AVBPrint *bp, AVFrame *frame)
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:76
#define flags(name, subs,...)
Definition: cbs_av1.c:561
Main libavformat public API header.
signed 16 bits
Definition: samplefmt.h:61
#define AVFMT_VARIABLE_FPS
Format allows variable fps.
Definition: avformat.h:470
signed 16 bits, planar
Definition: samplefmt.h:67
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
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
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:315
#define AVFMT_TS_NEGATIVE
Format allows muxing negative timestamps.
Definition: avformat.h:482
This structure stores compressed data.
Definition: avcodec.h:1454
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:334
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
const char * name
Definition: opengl_enc.c:102
void av_bprint_chars(AVBPrint *buf, char c, unsigned n)
Append char c n times to a print buffer.
Definition: bprint.c:140