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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;
  46. } AShowInfoContext;
  47.  
  48. static av_cold void uninit(AVFilterContext *ctx)
  49. {
  50.     AShowInfoContext *s = ctx->priv;
  51.     av_freep(&s->plane_checksums);
  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),
  89.            av_frame_get_pkt_pos(buf),
  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.  
  119. AVFilter avfilter_af_ashowinfo = {
  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. };
  127.