yading@10: /*
yading@10:  * Copyright (c) 2011 Stefano Sabatini
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * filter for showing textual audio frame information
yading@10:  */
yading@10: 
yading@10: #include <inttypes.h>
yading@10: #include <stddef.h>
yading@10: 
yading@10: #include "libavutil/adler32.h"
yading@10: #include "libavutil/channel_layout.h"
yading@10: #include "libavutil/common.h"
yading@10: #include "libavutil/mem.h"
yading@10: #include "libavutil/timestamp.h"
yading@10: #include "libavutil/samplefmt.h"
yading@10: 
yading@10: #include "audio.h"
yading@10: #include "avfilter.h"
yading@10: #include "internal.h"
yading@10: 
yading@10: typedef struct AShowInfoContext {
yading@10:     /**
yading@10:      * Scratch space for individual plane checksums for planar audio
yading@10:      */
yading@10:     uint32_t *plane_checksums;
yading@10: 
yading@10:     /**
yading@10:      * Frame counter
yading@10:      */
yading@10:     uint64_t frame;
yading@10: } AShowInfoContext;
yading@10: 
yading@10: static void uninit(AVFilterContext *ctx)
yading@10: {
yading@10:     AShowInfoContext *s = ctx->priv;
yading@10:     av_freep(&s->plane_checksums);
yading@10: }
yading@10: 
yading@10: static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
yading@10: {
yading@10:     AVFilterContext *ctx = inlink->dst;
yading@10:     AShowInfoContext *s  = ctx->priv;
yading@10:     char chlayout_str[128];
yading@10:     uint32_t checksum = 0;
yading@10:     int channels    = av_get_channel_layout_nb_channels(buf->channel_layout);
yading@10:     int planar      = av_sample_fmt_is_planar(buf->format);
yading@10:     int block_align = av_get_bytes_per_sample(buf->format) * (planar ? 1 : channels);
yading@10:     int data_size   = buf->nb_samples * block_align;
yading@10:     int planes      = planar ? channels : 1;
yading@10:     int i;
yading@10:     void *tmp_ptr = av_realloc(s->plane_checksums, channels * sizeof(*s->plane_checksums));
yading@10: 
yading@10:     if (!tmp_ptr)
yading@10:         return AVERROR(ENOMEM);
yading@10:     s->plane_checksums = tmp_ptr;
yading@10: 
yading@10:     for (i = 0; i < planes; i++) {
yading@10:         uint8_t *data = buf->extended_data[i];
yading@10: 
yading@10:         s->plane_checksums[i] = av_adler32_update(0, data, data_size);
yading@10:         checksum = i ? av_adler32_update(checksum, data, data_size) :
yading@10:                        s->plane_checksums[0];
yading@10:     }
yading@10: 
yading@10:     av_get_channel_layout_string(chlayout_str, sizeof(chlayout_str), -1,
yading@10:                                  buf->channel_layout);
yading@10: 
yading@10:     av_log(ctx, AV_LOG_INFO,
yading@10:            "n:%"PRIu64" pts:%s pts_time:%s pos:%"PRId64" "
yading@10:            "fmt:%s channels:%d chlayout:%s rate:%d nb_samples:%d "
yading@10:            "checksum:%08X ",
yading@10:            s->frame,
yading@10:            av_ts2str(buf->pts), av_ts2timestr(buf->pts, &inlink->time_base),
yading@10:            av_frame_get_pkt_pos(buf),
yading@10:            av_get_sample_fmt_name(buf->format), av_frame_get_channels(buf), chlayout_str,
yading@10:            buf->sample_rate, buf->nb_samples,
yading@10:            checksum);
yading@10: 
yading@10:     av_log(ctx, AV_LOG_INFO, "plane_checksums: [ ");
yading@10:     for (i = 0; i < planes; i++)
yading@10:         av_log(ctx, AV_LOG_INFO, "%08X ", s->plane_checksums[i]);
yading@10:     av_log(ctx, AV_LOG_INFO, "]\n");
yading@10: 
yading@10:     s->frame++;
yading@10:     return ff_filter_frame(inlink->dst->outputs[0], buf);
yading@10: }
yading@10: 
yading@10: static const AVFilterPad inputs[] = {
yading@10:     {
yading@10:         .name       = "default",
yading@10:         .type             = AVMEDIA_TYPE_AUDIO,
yading@10:         .get_audio_buffer = ff_null_get_audio_buffer,
yading@10:         .filter_frame     = filter_frame,
yading@10:     },
yading@10:     { NULL },
yading@10: };
yading@10: 
yading@10: static const AVFilterPad outputs[] = {
yading@10:     {
yading@10:         .name = "default",
yading@10:         .type = AVMEDIA_TYPE_AUDIO,
yading@10:     },
yading@10:     { NULL },
yading@10: };
yading@10: 
yading@10: AVFilter avfilter_af_ashowinfo = {
yading@10:     .name        = "ashowinfo",
yading@10:     .description = NULL_IF_CONFIG_SMALL("Show textual information for each audio frame."),
yading@10:     .priv_size   = sizeof(AShowInfoContext),
yading@10:     .uninit      = uninit,
yading@10:     .inputs      = inputs,
yading@10:     .outputs     = outputs,
yading@10: };