FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/uncodedframecrcenc.c
Date: 2024-02-29 09:57:37
Exec Total Coverage
Lines: 0 84 0.0%
Functions: 0 10 0.0%
Branches: 0 45 0.0%

Line Branch Exec Source
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/frame.h"
25 #include "libavutil/imgutils.h"
26 #include "libavutil/pixdesc.h"
27 #include "libavformat/mux.h"
28 #include "avformat.h"
29 #include "internal.h"
30
31 /* Identical to Adler32 when the type is uint8_t. */
32 #define DEFINE_CKSUM_LINE(name, type, conv) \
33 static void cksum_line_ ## name(unsigned *cksum, void *data, unsigned size) \
34 { \
35 type *p = data; \
36 unsigned a = *cksum & 0xFFFF, b = *cksum >> 16; \
37 for (; size > 0; size--, p++) { \
38 a = (a + (unsigned)(conv)) % 65521; \
39 b = (b + a) % 65521; \
40 } \
41 *cksum = a | (b << 16); \
42 }
43
44 DEFINE_CKSUM_LINE(u8, uint8_t, *p)
45 DEFINE_CKSUM_LINE(s16, int16_t, *p + 0x8000)
46 DEFINE_CKSUM_LINE(s32, int32_t, *p + 0x80000000)
47 DEFINE_CKSUM_LINE(flt, float, *p * 0x80000000 + 0x80000000)
48 DEFINE_CKSUM_LINE(dbl, double, *p * 0x80000000 + 0x80000000)
49
50 static void video_frame_cksum(AVBPrint *bp, AVFrame *frame)
51 {
52 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
53 int i, y;
54 uint8_t *data;
55 int linesize[5] = { 0 };
56
57 av_bprintf(bp, ", %d x %d", frame->width, frame->height);
58 if (!desc) {
59 av_bprintf(bp, ", unknown");
60 return;
61 }
62 if (av_image_fill_linesizes(linesize, frame->format, frame->width) < 0)
63 return;
64 av_bprintf(bp, ", %s", desc->name);
65 for (i = 0; linesize[i]; i++) {
66 unsigned cksum = 0;
67 int h = frame->height;
68 if ((i == 1 || i == 2) && desc->nb_components >= 3)
69 h = AV_CEIL_RSHIFT(h, desc->log2_chroma_h);
70 data = frame->data[i];
71 for (y = 0; y < h; y++) {
72 cksum = av_adler32_update(cksum, data, linesize[i]);
73 data += frame->linesize[i];
74 }
75 av_bprintf(bp, ", 0x%08x", cksum);
76 }
77 }
78
79 static void audio_frame_cksum(AVBPrint *bp, AVFrame *frame)
80 {
81 int nb_planes, nb_samples, p;
82 const char *name;
83
84 nb_planes = frame->ch_layout.nb_channels;
85 nb_samples = frame->nb_samples;
86 if (!av_sample_fmt_is_planar(frame->format)) {
87 nb_samples *= nb_planes;
88 nb_planes = 1;
89 }
90 name = av_get_sample_fmt_name(frame->format);
91 av_bprintf(bp, ", %d samples", frame->nb_samples);
92 av_bprintf(bp, ", %s", name ? name : "unknown");
93 for (p = 0; p < nb_planes; p++) {
94 uint32_t cksum = 0;
95 void *d = frame->extended_data[p];
96 switch (frame->format) {
97 case AV_SAMPLE_FMT_U8:
98 case AV_SAMPLE_FMT_U8P:
99 cksum_line_u8(&cksum, d, nb_samples);
100 break;
101 case AV_SAMPLE_FMT_S16:
102 case AV_SAMPLE_FMT_S16P:
103 cksum_line_s16(&cksum, d, nb_samples);
104 break;
105 case AV_SAMPLE_FMT_S32:
106 case AV_SAMPLE_FMT_S32P:
107 cksum_line_s32(&cksum, d, nb_samples);
108 break;
109 case AV_SAMPLE_FMT_FLT:
110 case AV_SAMPLE_FMT_FLTP:
111 cksum_line_flt(&cksum, d, nb_samples);
112 break;
113 case AV_SAMPLE_FMT_DBL:
114 case AV_SAMPLE_FMT_DBLP:
115 cksum_line_dbl(&cksum, d, nb_samples);
116 break;
117 default:
118 av_assert0(!"reached");
119 }
120 av_bprintf(bp, ", 0x%08"PRIx32, cksum);
121 }
122 }
123
124 static int write_header(struct AVFormatContext *s)
125 {
126 return ff_framehash_write_header(s);
127 }
128
129 static int write_frame(struct AVFormatContext *s, int stream_index,
130 AVFrame **frame, unsigned flags)
131 {
132 AVBPrint bp;
133 int ret = 0;
134 enum AVMediaType type;
135 const char *type_name;
136
137 if ((flags & AV_WRITE_UNCODED_FRAME_QUERY))
138 return 0;
139
140 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED);
141 av_bprintf(&bp, "%d, %10"PRId64"",
142 stream_index, (*frame)->pts);
143 type = s->streams[stream_index]->codecpar->codec_type;
144 type_name = av_get_media_type_string(type);
145 av_bprintf(&bp, ", %s", type_name ? type_name : "unknown");
146 switch (type) {
147 case AVMEDIA_TYPE_VIDEO:
148 video_frame_cksum(&bp, *frame);
149 break;
150 case AVMEDIA_TYPE_AUDIO:
151 audio_frame_cksum(&bp, *frame);
152 break;
153 }
154
155 av_bprint_chars(&bp, '\n', 1);
156 if (av_bprint_is_complete(&bp))
157 avio_write(s->pb, bp.str, bp.len);
158 else
159 ret = AVERROR(ENOMEM);
160 av_bprint_finalize(&bp, NULL);
161 return ret;
162 }
163
164 static int write_packet(struct AVFormatContext *s, AVPacket *pkt)
165 {
166 return AVERROR(ENOSYS);
167 }
168
169 const FFOutputFormat ff_uncodedframecrc_muxer = {
170 .p.name = "uncodedframecrc",
171 .p.long_name = NULL_IF_CONFIG_SMALL("uncoded framecrc testing"),
172 .p.audio_codec = AV_CODEC_ID_PCM_S16LE,
173 .p.video_codec = AV_CODEC_ID_RAWVIDEO,
174 .p.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
175 AVFMT_TS_NEGATIVE,
176 .write_header = write_header,
177 .write_packet = write_packet,
178 .write_uncoded_frame = write_frame,
179 };
180