From e30a0b1b3b1f06bc34f43e8f77ddfd97503d8736 Mon Sep 17 00:00:00 2001 From: Stefano Sabatini Date: Thu, 18 Aug 2011 18:19:55 +0200 Subject: [PATCH] lavfi: add ashowinfo filter Useful for debugging. --- Changelog | 1 + doc/filters.texi | 50 +++++++++++++++++++ libavfilter/Makefile | 1 + libavfilter/af_ashowinfo.c | 99 ++++++++++++++++++++++++++++++++++++++ libavfilter/allfilters.c | 1 + libavfilter/avfilter.h | 2 +- 6 files changed, 153 insertions(+), 1 deletion(-) create mode 100644 libavfilter/af_ashowinfo.c diff --git a/Changelog b/Changelog index c606eb242e..61ea4e48f8 100644 --- a/Changelog +++ b/Changelog @@ -44,6 +44,7 @@ easier to use. The changes are: * -intra option was removed, it's equivalent to -g 0. - XMV demuxer - LOAS demuxer +- ashowinfo filter added version 0.8: diff --git a/doc/filters.texi b/doc/filters.texi index ce7d064b00..dd99c73175 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -137,6 +137,56 @@ For example, to resample the input audio to 44100Hz: aresample=44100 @end example +@section ashowinfo + +Show a line containing various information for each input audio frame. +The input audio is not modified. + +The shown line contains a sequence of key/value pairs of the form +@var{key}:@var{value}. + +A description of each shown parameter follows: + +@table @option +@item n +sequential number of the input frame, starting from 0 + +@item pts +presentation TimeStamp of the input frame, expressed as a number of +time base units. The time base unit depends on the filter input pad, and +is usually 1/@var{sample_rate}. + +@item pts_time +presentation TimeStamp of the input frame, expressed as a number of +seconds + +@item pos +position of the frame in the input stream, -1 if this information in +unavailable and/or meanigless (for example in case of synthetic audio) + +@item fmt +sample format name + +@item chlayout +channel layout description + +@item nb_samples +number of samples (per each channel) contained in the filtered frame + +@item rate +sample rate for the audio frame + +@item planar +if the packing format is planar, 0 if packed + +@item checksum +Adler-32 checksum of all the planes of the input frame + +@item plane_checksum +Adler-32 checksum for each input frame plane, expressed in the form +"[@var{c0} @var{c1} @var{c2} @var{c3} @var{c4} @var{c5} @var{c6} @var{c7}]" +@end table + @c man end AUDIO FILTERS @chapter Audio Sources diff --git a/libavfilter/Makefile b/libavfilter/Makefile index aa4654e207..a3faf27fb4 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -22,6 +22,7 @@ OBJS-$(CONFIG_AVCODEC) += avcodec.o OBJS-$(CONFIG_AFORMAT_FILTER) += af_aformat.o OBJS-$(CONFIG_ANULL_FILTER) += af_anull.o OBJS-$(CONFIG_ARESAMPLE_FILTER) += af_aresample.o +OBJS-$(CONFIG_ASHOWINFO_FILTER) += af_ashowinfo.o OBJS-$(CONFIG_ANULLSRC_FILTER) += asrc_anullsrc.o diff --git a/libavfilter/af_ashowinfo.c b/libavfilter/af_ashowinfo.c new file mode 100644 index 0000000000..25ec342eea --- /dev/null +++ b/libavfilter/af_ashowinfo.c @@ -0,0 +1,99 @@ +/* + * 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 fow 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; + + for (plane = 0; samplesref->data[plane] && plane < 8; plane++) { + uint8_t *data = samplesref->data[plane]; + int linesize = samplesref->linesize[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:%u plane_checksum[%u %u %u %u %u %u %u %u]\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 = (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 = (AVFilterPad[]) {{ .name = "default", + .type = AVMEDIA_TYPE_AUDIO }, + { .name = NULL}}, +}; diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index f623d00979..5cf330c395 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -37,6 +37,7 @@ void avfilter_register_all(void) REGISTER_FILTER (AFORMAT, aformat, af); REGISTER_FILTER (ANULL, anull, af); REGISTER_FILTER (ARESAMPLE, aresample, af); + REGISTER_FILTER (ASHOWINFO, ashowinfo, af); REGISTER_FILTER (ANULLSRC, anullsrc, asrc); diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h index 4df18d200c..af2d3cd3e3 100644 --- a/libavfilter/avfilter.h +++ b/libavfilter/avfilter.h @@ -29,7 +29,7 @@ #include "libavutil/rational.h" #define LIBAVFILTER_VERSION_MAJOR 2 -#define LIBAVFILTER_VERSION_MINOR 32 +#define LIBAVFILTER_VERSION_MINOR 33 #define LIBAVFILTER_VERSION_MICRO 0 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \