diff options
Diffstat (limited to 'libavfilter/af_ashowinfo.c')
-rw-r--r-- | libavfilter/af_ashowinfo.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/libavfilter/af_ashowinfo.c b/libavfilter/af_ashowinfo.c new file mode 100644 index 0000000..0d4bbb2 --- /dev/null +++ b/libavfilter/af_ashowinfo.c @@ -0,0 +1,106 @@ +/* + * 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 "libavutil/timestamp.h" +#include "audio.h" +#include "avfilter.h" + +typedef struct { + unsigned int frame; +} ShowInfoContext; + +static av_cold int init(AVFilterContext *ctx, const char *args) +{ + ShowInfoContext *showinfo = ctx->priv; + showinfo->frame = 0; + return 0; +} + +static int 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 (!av_sample_fmt_is_planar(samplesref->format)) + 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:%s pts_time:%s pos:%"PRId64" " + "fmt:%s chlayout:%s nb_samples:%d rate:%d " + "checksum:%08X plane_checksum[%08X", + showinfo->frame, + av_ts2str(samplesref->pts), av_ts2timestr(samplesref->pts, &inlink->time_base), + samplesref->pos, + av_get_sample_fmt_name(samplesref->format), + chlayout_str, + samplesref->audio->nb_samples, + samplesref->audio->sample_rate, + checksum, + plane_checksum[0]); + + for (plane = 1; samplesref->data[plane] && plane < 8; plane++) + av_log(ctx, AV_LOG_INFO, " %08X", plane_checksum[plane]); + av_log(ctx, AV_LOG_INFO, "]\n"); + + showinfo->frame++; + return ff_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 = ff_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}}, +}; |