FFmpeg  2.1.1
af_ashowinfo.c
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1 /*
2  * Copyright (c) 2011 Stefano Sabatini
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
8  * License 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 GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * filter for showing textual audio frame information
24  */
25 
26 #include <inttypes.h>
27 #include <stddef.h>
28 
29 #include "libavutil/adler32.h"
30 #include "libavutil/attributes.h"
31 #include "libavutil/channel_layout.h"
32 #include "libavutil/common.h"
33 #include "libavutil/mem.h"
34 #include "libavutil/timestamp.h"
35 #include "libavutil/samplefmt.h"
36 
37 #include "audio.h"
38 #include "avfilter.h"
39 #include "internal.h"
40 
41 typedef struct AShowInfoContext {
42  /**
43  * Scratch space for individual plane checksums for planar audio
44  */
45  uint32_t *plane_checksums;
47 
48 static av_cold void uninit(AVFilterContext *ctx)
49 {
50  AShowInfoContext *s = ctx->priv;
52 }
53 
54 static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
55 {
56  AVFilterContext *ctx = inlink->dst;
57  AShowInfoContext *s = ctx->priv;
58  char chlayout_str[128];
59  uint32_t checksum = 0;
60  int channels = inlink->channels;
61  int planar = av_sample_fmt_is_planar(buf->format);
62  int block_align = av_get_bytes_per_sample(buf->format) * (planar ? 1 : channels);
63  int data_size = buf->nb_samples * block_align;
64  int planes = planar ? channels : 1;
65  int i;
66  void *tmp_ptr = av_realloc(s->plane_checksums, channels * sizeof(*s->plane_checksums));
67 
68  if (!tmp_ptr)
69  return AVERROR(ENOMEM);
70  s->plane_checksums = tmp_ptr;
71 
72  for (i = 0; i < planes; i++) {
73  uint8_t *data = buf->extended_data[i];
74 
75  s->plane_checksums[i] = av_adler32_update(0, data, data_size);
76  checksum = i ? av_adler32_update(checksum, data, data_size) :
77  s->plane_checksums[0];
78  }
79 
80  av_get_channel_layout_string(chlayout_str, sizeof(chlayout_str), -1,
81  buf->channel_layout);
82 
83  av_log(ctx, AV_LOG_INFO,
84  "n:%"PRId64" pts:%s pts_time:%s pos:%"PRId64" "
85  "fmt:%s channels:%d chlayout:%s rate:%d nb_samples:%d "
86  "checksum:%08X ",
87  inlink->frame_count,
88  av_ts2str(buf->pts), av_ts2timestr(buf->pts, &inlink->time_base),
90  av_get_sample_fmt_name(buf->format), av_frame_get_channels(buf), chlayout_str,
91  buf->sample_rate, buf->nb_samples,
92  checksum);
93 
94  av_log(ctx, AV_LOG_INFO, "plane_checksums: [ ");
95  for (i = 0; i < planes; i++)
96  av_log(ctx, AV_LOG_INFO, "%08X ", s->plane_checksums[i]);
97  av_log(ctx, AV_LOG_INFO, "]\n");
98 
99  return ff_filter_frame(inlink->dst->outputs[0], buf);
100 }
101 
102 static const AVFilterPad inputs[] = {
103  {
104  .name = "default",
105  .type = AVMEDIA_TYPE_AUDIO,
106  .filter_frame = filter_frame,
107  },
108  { NULL }
109 };
110 
111 static const AVFilterPad outputs[] = {
112  {
113  .name = "default",
114  .type = AVMEDIA_TYPE_AUDIO,
115  },
116  { NULL }
117 };
118 
120  .name = "ashowinfo",
121  .description = NULL_IF_CONFIG_SMALL("Show textual information for each audio frame."),
122  .priv_size = sizeof(AShowInfoContext),
123  .uninit = uninit,
124  .inputs = inputs,
125  .outputs = outputs,
126 };
const char * s
Definition: avisynth_c.h:668
This structure describes decoded (raw) audio or video data.
Definition: frame.h:96
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:47
const char * name
Filter name.
Definition: avfilter.h:468
void * priv
private data for use by the filter
Definition: avfilter.h:648
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:111
#define av_ts2timestr(ts, tb)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:72
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:140
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
#define av_cold
Definition: avcodec.h:653
void av_freep(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:234
const char * name
Pad name.
Definition: internal.h:66
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1118
uint8_t
unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf, unsigned int len) av_pure
Calculate the Adler32 checksum of a buffer.
Definition: adler32.c:35
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:182
const char data[16]
Definition: mxf.c:68
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
Definition: af_ashowinfo.c:54
A filter pad used for either input or output.
Definition: internal.h:60
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:151
int av_frame_get_channels(const AVFrame *frame)
uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:354
void * av_realloc(void *ptr, size_t size) 1(2)
Allocate or reallocate a block of memory.
Definition: mem.c:141
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_ashowinfo.c:48
Main libavfilter public API header.
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:642
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:157
uint32_t * plane_checksums
Scratch space for individual plane checksums for planar audio.
Definition: af_ashowinfo.c:45
#define AV_LOG_INFO
Standard information.
Definition: avcodec.h:4158
void * buf
Definition: avisynth_c.h:594
int sample_rate
Sample rate of the audio data.
Definition: frame.h:349
Filter definition.
Definition: avfilter.h:464
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:102
AVFilter avfilter_af_ashowinfo
Definition: af_ashowinfo.c:119
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
Check if the sample format is planar.
Definition: samplefmt.c:118
#define AVERROR(e)
An instance of a filter.
Definition: avfilter.h:627
internal API functions
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
Definition: samplefmt.c:104
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:150
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:50
int64_t av_frame_get_pkt_pos(const AVFrame *frame)
void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, uint64_t channel_layout)
Return a description of a channel layout.