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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 
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 = -((-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 
78 {
79  int nb_planes, nb_samples, p;
80  const char *name;
81 
82  nb_planes = av_frame_get_channels(frame);
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%08x", cksum);
119  }
120 }
121 
122 static int write_frame(struct AVFormatContext *s, int stream_index,
123  AVFrame **frame, unsigned flags)
124 {
125  AVBPrint bp;
126  int ret = 0;
127  enum AVMediaType type;
128  const char *type_name;
129 
130  if ((flags & AV_WRITE_UNCODED_FRAME_QUERY))
131  return 0;
132 
134  av_bprintf(&bp, "%d, %10"PRId64"",
135  stream_index, (*frame)->pts);
136  type = s->streams[stream_index]->codec->codec_type;
137  type_name = av_get_media_type_string(type);
138  av_bprintf(&bp, ", %s", type_name ? type_name : "unknown");
139  switch (type) {
140  case AVMEDIA_TYPE_VIDEO:
141  video_frame_cksum(&bp, *frame);
142  break;
143  case AVMEDIA_TYPE_AUDIO:
144  audio_frame_cksum(&bp, *frame);
145  break;
146  }
147 
148  av_bprint_chars(&bp, '\n', 1);
149  if (av_bprint_is_complete(&bp))
150  avio_write(s->pb, bp.str, bp.len);
151  else
152  ret = AVERROR(ENOMEM);
153  av_bprint_finalize(&bp, NULL);
154  return ret;
155 }
156 
158 {
159  return AVERROR(ENOSYS);
160 }
161 
163  .name = "uncodedframecrc",
164  .long_name = NULL_IF_CONFIG_SMALL("uncoded framecrc testing"),
165  .audio_codec = AV_CODEC_ID_PCM_S16LE,
166  .video_codec = AV_CODEC_ID_RAWVIDEO,
167  .write_header = ff_framehash_write_header,
168  .write_packet = write_packet,
169  .write_uncoded_frame = write_frame,
172 };