| /* |
| * Copyright (c) 2011 Stefano Sabatini |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * filter for showing textual audio frame information |
| */ |
| |
| #include "libavutil/adler32.h" |
| #include "libavutil/audioconvert.h" |
| #include "avfilter.h" |
| |
| typedef struct { |
| unsigned int frame; |
| } ShowInfoContext; |
| |
| static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| ShowInfoContext *showinfo = ctx->priv; |
| showinfo->frame = 0; |
| return 0; |
| } |
| |
| static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *samplesref) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| ShowInfoContext *showinfo = ctx->priv; |
| uint32_t plane_checksum[8] = {0}, checksum = 0; |
| char chlayout_str[128]; |
| int plane; |
| int linesize = |
| samplesref->audio->nb_samples * |
| av_get_bytes_per_sample(samplesref->format); |
| if (!samplesref->audio->planar) /* packed layout */ |
| linesize *= av_get_channel_layout_nb_channels(samplesref->audio->channel_layout); |
| |
| for (plane = 0; samplesref->data[plane] && plane < 8; plane++) { |
| uint8_t *data = samplesref->data[plane]; |
| |
| plane_checksum[plane] = av_adler32_update(plane_checksum[plane], |
| data, linesize); |
| checksum = av_adler32_update(checksum, data, linesize); |
| } |
| |
| av_get_channel_layout_string(chlayout_str, sizeof(chlayout_str), -1, |
| samplesref->audio->channel_layout); |
| |
| av_log(ctx, AV_LOG_INFO, |
| "n:%d pts:%"PRId64" pts_time:%f pos:%"PRId64" " |
| "fmt:%s chlayout:%s nb_samples:%d rate:%d planar:%d " |
| "checksum:%08X plane_checksum[%08X %08X %08X %08X %08X %08X %08X %08X]\n", |
| showinfo->frame, |
| samplesref->pts, samplesref->pts * av_q2d(inlink->time_base), |
| samplesref->pos, |
| av_get_sample_fmt_name(samplesref->format), |
| chlayout_str, |
| samplesref->audio->nb_samples, |
| samplesref->audio->sample_rate, |
| samplesref->audio->planar, |
| checksum, |
| plane_checksum[0], plane_checksum[1], plane_checksum[2], plane_checksum[3], |
| plane_checksum[4], plane_checksum[5], plane_checksum[6], plane_checksum[7]); |
| |
| showinfo->frame++; |
| |
| avfilter_filter_samples(inlink->dst->outputs[0], samplesref); |
| } |
| |
| AVFilter avfilter_af_ashowinfo = { |
| .name = "ashowinfo", |
| .description = NULL_IF_CONFIG_SMALL("Show textual information for each audio frame."), |
| |
| .priv_size = sizeof(ShowInfoContext), |
| .init = init, |
| |
| .inputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| .get_audio_buffer = avfilter_null_get_audio_buffer, |
| .filter_samples = filter_samples, |
| .min_perms = AV_PERM_READ, }, |
| { .name = NULL}}, |
| |
| .outputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO }, |
| { .name = NULL}}, |
| }; |