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examples/filtering_audio: get rid of AVABufferSinkParams 

AVABufferSinkParams are ignored by avfilter_graph_create_filter,
therefore the example is misleading.  Use av_opt_set_int_list to
configure abuffersink directly.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Pavel Koshevoy 2013-04-17 00:46:49 -06:00 committed by Michael Niedermayer
parent f2619cbd61
commit e5644313c5
1 changed files with 26 additions and 6 deletions
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32
doc/examples/filtering_audio.c
View File

@ -36,6 +36,7 @@
#include <libavfilter/avcodec.h>
#include <libavfilter/buffersink.h>
#include <libavfilter/buffersrc.h>
#include <libavutil/opt.h>
const char *filter_descr = "aresample=8000,aformat=sample_fmts=s16:channel_layouts=mono";
const char *player = "ffplay -f s16le -ar 8000 -ac 1 -";
@ -89,8 +90,9 @@ static int init_filters(const char *filters_descr)
AVFilter *abuffersink = avfilter_get_by_name("abuffersink");
AVFilterInOut *outputs = avfilter_inout_alloc();
AVFilterInOut *inputs = avfilter_inout_alloc();
const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, -1 };
AVABufferSinkParams *abuffersink_params;
const enum AVSampleFormat out_sample_fmts[] = { AV_SAMPLE_FMT_S16, -1 };
const int64_t out_channel_layouts[] = { AV_CH_LAYOUT_MONO, -1 };
const int out_sample_rates[] = { 8000, -1 };
const AVFilterLink *outlink;
AVRational time_base = fmt_ctx->streams[audio_stream_index]->time_base;
@ -111,16 +113,34 @@ static int init_filters(const char *filters_descr)
}
/* buffer audio sink: to terminate the filter chain. */
abuffersink_params = av_abuffersink_params_alloc();
abuffersink_params->sample_fmts = sample_fmts;
ret = avfilter_graph_create_filter(&buffersink_ctx, abuffersink, "out",
NULL, abuffersink_params, filter_graph);
av_free(abuffersink_params);
NULL, NULL, filter_graph);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer sink\n");
return ret;
}
ret = av_opt_set_int_list(buffersink_ctx, "sample_fmts", out_sample_fmts, -1,
AV_OPT_SEARCH_CHILDREN);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot set output sample format\n");
return ret;
}
ret = av_opt_set_int_list(buffersink_ctx, "channel_layouts", out_channel_layouts, -1,
AV_OPT_SEARCH_CHILDREN);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot set output channel layout\n");
return ret;
}
ret = av_opt_set_int_list(buffersink_ctx, "sample_rates", out_sample_rates, -1,
AV_OPT_SEARCH_CHILDREN);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot set output sample rate\n");
return ret;
}
/* Endpoints for the filter graph. */
outputs->name = av_strdup("in");
outputs->filter_ctx = buffersrc_ctx;