2 * Copyright (c) 2011 Stefano Sabatini
4 * This file is part of FFmpeg.
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.
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.
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
23 * filter for showing textual audio frame information
26 #include "libavutil/adler32.h"
27 #include "libavutil/audioconvert.h"
28 #include "libavutil/timestamp.h"
35 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
37 ShowInfoContext *showinfo = ctx->priv;
42 static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *samplesref)
44 AVFilterContext *ctx = inlink->dst;
45 ShowInfoContext *showinfo = ctx->priv;
46 uint32_t plane_checksum[8] = {0}, checksum = 0;
47 char chlayout_str[128];
50 samplesref->audio->nb_samples *
51 av_get_bytes_per_sample(samplesref->format);
52 if (!samplesref->audio->planar) /* packed layout */
53 linesize *= av_get_channel_layout_nb_channels(samplesref->audio->channel_layout);
55 for (plane = 0; samplesref->data[plane] && plane < 8; plane++) {
56 uint8_t *data = samplesref->data[plane];
58 plane_checksum[plane] = av_adler32_update(plane_checksum[plane],
60 checksum = av_adler32_update(checksum, data, linesize);
63 av_get_channel_layout_string(chlayout_str, sizeof(chlayout_str), -1,
64 samplesref->audio->channel_layout);
66 av_log(ctx, AV_LOG_INFO,
67 "n:%d pts:%s pts_time:%s pos:%"PRId64" "
68 "fmt:%s chlayout:%s nb_samples:%d rate:%d planar:%d "
69 "checksum:%08X plane_checksum[%08X",
71 av_ts2str(samplesref->pts), av_ts2timestr(samplesref->pts, &inlink->time_base),
73 av_get_sample_fmt_name(samplesref->format),
75 samplesref->audio->nb_samples,
76 samplesref->audio->sample_rate,
77 samplesref->audio->planar,
81 for (plane = 1; samplesref->data[plane] && plane < 8; plane++)
82 av_log(ctx, AV_LOG_INFO, " %08X", plane_checksum[plane]);
83 av_log(ctx, AV_LOG_INFO, "]\n");
86 avfilter_filter_samples(inlink->dst->outputs[0], samplesref);
89 AVFilter avfilter_af_ashowinfo = {
91 .description = NULL_IF_CONFIG_SMALL("Show textual information for each audio frame."),
93 .priv_size = sizeof(ShowInfoContext),
96 .inputs = (const AVFilterPad[]) {{ .name = "default",
97 .type = AVMEDIA_TYPE_AUDIO,
98 .get_audio_buffer = avfilter_null_get_audio_buffer,
99 .filter_samples = filter_samples,
100 .min_perms = AV_PERM_READ, },
103 .outputs = (const AVFilterPad[]) {{ .name = "default",
104 .type = AVMEDIA_TYPE_AUDIO },