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av_aresample: Allow changing sample format and channel layout as well

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-05-17 16:12:54 +02:00
parent a0493be10e
commit b13d39bd81
1 changed files with 45 additions and 27 deletions
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64
libavfilter/af_aresample.c
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@ -26,13 +26,14 @@
#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
#include "libavutil/avassert.h"
#include "libswresample/swresample.h"
#include "avfilter.h"
#include "audio.h"
#include "internal.h"
typedef struct {
int out_rate;
double ratio;
struct SwrContext *swr;
} AResampleContext;
@ -57,12 +58,14 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
if(value) {
if((ret=av_opt_set(aresample->swr, token, value, 0)) < 0)
goto end;
} else if ((ret = ff_parse_sample_rate(&aresample->out_rate, token, ctx)) < 0)
} else {
int out_rate;
if ((ret = ff_parse_sample_rate(&out_rate, token, ctx)) < 0)
goto end;
if((ret = av_opt_set_int(aresample->swr, "osr", out_rate, 0)) < 0)
goto end;
}
} else {
aresample->out_rate = -1;
}
}
end:
av_free(argd);
@ -78,34 +81,42 @@ static av_cold void uninit(AVFilterContext *ctx)
static int query_formats(AVFilterContext *ctx)
{
AResampleContext *aresample = ctx->priv;
int out_rate = av_get_int(aresample->swr, "osr", NULL);
uint64_t out_layout = av_get_int(aresample->swr, "ocl", NULL);
enum AVSampleFormat out_format = av_get_int(aresample->swr, "osf", NULL);
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
AVFilterFormats *in_formats = avfilter_all_formats(AVMEDIA_TYPE_AUDIO);
AVFilterFormats *out_formats = avfilter_all_formats(AVMEDIA_TYPE_AUDIO);
AVFilterFormats *out_formats;
AVFilterFormats *in_samplerates = ff_all_samplerates();
AVFilterFormats *out_samplerates;
AVFilterChannelLayouts *in_layouts = ff_all_channel_layouts();
AVFilterChannelLayouts *out_layouts = ff_all_channel_layouts();
AVFilterChannelLayouts *out_layouts;
avfilter_formats_ref (in_formats, &inlink->out_formats);
avfilter_formats_ref(out_formats, &outlink->in_formats);
avfilter_formats_ref (in_samplerates, &inlink->out_samplerates);
ff_channel_layouts_ref(in_layouts, &inlink->out_channel_layouts);
ff_channel_layouts_ref(out_layouts, &outlink->in_channel_layouts);
if(aresample->out_rate > 0) {
int sample_rates[] = { aresample->out_rate, -1 };
avfilter_formats_ref(avfilter_make_format_list(sample_rates), &outlink->in_samplerates);
if(out_rate > 0) {
out_samplerates = avfilter_make_format_list((int[]){ out_rate, -1 });
} else {
out_samplerates = ff_all_samplerates();
avfilter_formats_ref(out_samplerates, &outlink->in_samplerates);
}
avfilter_formats_ref(out_samplerates, &outlink->in_samplerates);
if(out_format != AV_SAMPLE_FMT_NONE) {
out_formats = avfilter_make_format_list((int[]){ out_format, -1 });
} else
out_formats = avfilter_make_all_formats(AVMEDIA_TYPE_AUDIO);
avfilter_formats_ref(out_formats, &outlink->in_formats);
if(out_layout) {
out_layouts = avfilter_make_format64_list((int64_t[]){ out_layout, -1 });
} else
out_layouts = ff_all_channel_layouts();
ff_channel_layouts_ref(out_layouts, &outlink->in_channel_layouts);
return 0;
}
@ -117,12 +128,9 @@ static int config_output(AVFilterLink *outlink)
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
AResampleContext *aresample = ctx->priv;
if (aresample->out_rate == -1)
aresample->out_rate = outlink->sample_rate;
else
outlink->sample_rate = aresample->out_rate;
outlink->time_base = (AVRational) {1, aresample->out_rate};
int out_rate;
uint64_t out_layout;
enum AVSampleFormat out_format;
aresample->swr = swr_alloc_set_opts(aresample->swr,
outlink->channel_layout, outlink->format, outlink->sample_rate,
@ -130,10 +138,20 @@ static int config_output(AVFilterLink *outlink)
0, ctx);
if (!aresample->swr)
return AVERROR(ENOMEM);
ret = swr_init(aresample->swr);
if (ret < 0)
return ret;
out_rate = av_get_int(aresample->swr, "osr", NULL);
out_layout = av_get_int(aresample->swr, "ocl", NULL);
out_format = av_get_int(aresample->swr, "osf", NULL);
outlink->time_base = (AVRational) {1, out_rate};
av_assert0(outlink->sample_rate == out_rate);
av_assert0(outlink->channel_layout == out_layout);
av_assert0(outlink->format == out_format);
aresample->ratio = (double)outlink->sample_rate / inlink->sample_rate;
av_log(ctx, AV_LOG_INFO, "r:%"PRId64"Hz -> r:%"PRId64"Hz\n",