1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/*
* Copyright (c) 2013 Nicolas George
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/adler32.h"
#include "libavutil/avassert.h"
#include "libavutil/bprint.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "avformat.h"
#include "internal.h"
/* Identical to Adler32 when the type is uint8_t. */
#define DEFINE_CKSUM_LINE(name, type, conv) \
static void cksum_line_ ## name(unsigned *cksum, void *data, unsigned size) \
{ \
type *p = data; \
unsigned a = *cksum & 0xFFFF, b = *cksum >> 16; \
for (; size > 0; size--, p++) { \
a = (a + (unsigned)(conv)) % 65521; \
b = (b + a) % 65521; \
} \
*cksum = a | (b << 16); \
}
DEFINE_CKSUM_LINE(u8, uint8_t, *p)
DEFINE_CKSUM_LINE(s16, int16_t, *p + 0x8000)
DEFINE_CKSUM_LINE(s32, int32_t, *p + 0x80000000)
DEFINE_CKSUM_LINE(flt, float, *p * 0x80000000 + 0x80000000)
DEFINE_CKSUM_LINE(dbl, double, *p * 0x80000000 + 0x80000000)
static void video_frame_cksum(AVBPrint *bp, AVFrame *frame)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
int i, y;
uint8_t *data;
int linesize[5] = { 0 };
av_bprintf(bp, ", %d x %d", frame->width, frame->height);
if (!desc) {
av_bprintf(bp, ", unknown");
return;
}
if (av_image_fill_linesizes(linesize, frame->format, frame->width) < 0)
return;
av_bprintf(bp, ", %s", desc->name);
for (i = 0; linesize[i]; i++) {
unsigned cksum = 0;
int h = frame->height;
if ((i == 1 || i == 2) && desc->nb_components >= 3)
h = AV_CEIL_RSHIFT(h, desc->log2_chroma_h);
data = frame->data[i];
for (y = 0; y < h; y++) {
cksum = av_adler32_update(cksum, data, linesize[i]);
data += frame->linesize[i];
}
av_bprintf(bp, ", 0x%08x", cksum);
}
}
static void audio_frame_cksum(AVBPrint *bp, AVFrame *frame)
{
int nb_planes, nb_samples, p;
const char *name;
nb_planes = av_frame_get_channels(frame);
nb_samples = frame->nb_samples;
if (!av_sample_fmt_is_planar(frame->format)) {
nb_samples *= nb_planes;
nb_planes = 1;
}
name = av_get_sample_fmt_name(frame->format);
av_bprintf(bp, ", %d samples", frame->nb_samples);
av_bprintf(bp, ", %s", name ? name : "unknown");
for (p = 0; p < nb_planes; p++) {
uint32_t cksum = 0;
void *d = frame->extended_data[p];
switch (frame->format) {
case AV_SAMPLE_FMT_U8:
case AV_SAMPLE_FMT_U8P:
cksum_line_u8(&cksum, d, nb_samples);
break;
case AV_SAMPLE_FMT_S16:
case AV_SAMPLE_FMT_S16P:
cksum_line_s16(&cksum, d, nb_samples);
break;
case AV_SAMPLE_FMT_S32:
case AV_SAMPLE_FMT_S32P:
cksum_line_s32(&cksum, d, nb_samples);
break;
case AV_SAMPLE_FMT_FLT:
case AV_SAMPLE_FMT_FLTP:
cksum_line_flt(&cksum, d, nb_samples);
break;
case AV_SAMPLE_FMT_DBL:
case AV_SAMPLE_FMT_DBLP:
cksum_line_dbl(&cksum, d, nb_samples);
break;
default:
av_assert0(!"reached");
}
av_bprintf(bp, ", 0x%08x", cksum);
}
}
static int write_header(struct AVFormatContext *s)
{
return ff_framehash_write_header(s, 1);
}
static int write_frame(struct AVFormatContext *s, int stream_index,
AVFrame **frame, unsigned flags)
{
AVBPrint bp;
int ret = 0;
enum AVMediaType type;
const char *type_name;
if ((flags & AV_WRITE_UNCODED_FRAME_QUERY))
return 0;
av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED);
av_bprintf(&bp, "%d, %10"PRId64"",
stream_index, (*frame)->pts);
type = s->streams[stream_index]->codecpar->codec_type;
type_name = av_get_media_type_string(type);
av_bprintf(&bp, ", %s", type_name ? type_name : "unknown");
switch (type) {
case AVMEDIA_TYPE_VIDEO:
video_frame_cksum(&bp, *frame);
break;
case AVMEDIA_TYPE_AUDIO:
audio_frame_cksum(&bp, *frame);
break;
}
av_bprint_chars(&bp, '\n', 1);
if (av_bprint_is_complete(&bp))
avio_write(s->pb, bp.str, bp.len);
else
ret = AVERROR(ENOMEM);
av_bprint_finalize(&bp, NULL);
return ret;
}
static int write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
return AVERROR(ENOSYS);
}
AVOutputFormat ff_uncodedframecrc_muxer = {
.name = "uncodedframecrc",
.long_name = NULL_IF_CONFIG_SMALL("uncoded framecrc testing"),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_RAWVIDEO,
.write_header = write_header,
.write_packet = write_packet,
.write_uncoded_frame = write_frame,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
};
|
