* sample format and channel layout conversion audio filter
*/
-#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
+#include "libavutil/opt.h"
#include "libswresample/swresample.h"
#include "avfilter.h"
#include "audio.h"
#include "internal.h"
typedef struct {
+ const AVClass *class;
enum AVSampleFormat out_sample_fmt;
int64_t out_chlayout;
struct SwrContext *swr;
+ char *format_str;
+ char *channel_layout_str;
} AConvertContext;
+#define OFFSET(x) offsetof(AConvertContext, x)
+#define A AV_OPT_FLAG_AUDIO_PARAM
+#define F AV_OPT_FLAG_FILTERING_PARAM
+static const AVOption aconvert_options[] = {
+ { "sample_fmt", "", OFFSET(format_str), AV_OPT_TYPE_STRING, .flags = A|F },
+ { "channel_layout", "", OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A|F },
+ { NULL },
+};
+
+AVFILTER_DEFINE_CLASS(aconvert);
+
static av_cold int init(AVFilterContext *ctx)
{
AConvertContext *aconvert = ctx->priv;
- char *arg, *ptr = NULL;
int ret = 0;
- char *args = av_strdup(NULL);
av_log(ctx, AV_LOG_WARNING, "This filter is deprecated, use aformat instead\n");
aconvert->out_sample_fmt = AV_SAMPLE_FMT_NONE;
aconvert->out_chlayout = 0;
- if ((arg = av_strtok(args, ":", &ptr)) && strcmp(arg, "auto")) {
- if ((ret = ff_parse_sample_format(&aconvert->out_sample_fmt, arg, ctx)) < 0)
- goto end;
- }
- if ((arg = av_strtok(NULL, ":", &ptr)) && strcmp(arg, "auto")) {
- if ((ret = ff_parse_channel_layout(&aconvert->out_chlayout, arg, ctx)) < 0)
- goto end;
- }
-
-end:
- av_freep(&args);
+ if (aconvert->format_str && strcmp(aconvert->format_str, "auto") &&
+ (ret = ff_parse_sample_format(&aconvert->out_sample_fmt, aconvert->format_str, ctx)) < 0)
+ return ret;
+ if (aconvert->channel_layout_str && strcmp(aconvert->channel_layout_str, "auto"))
+ return ff_parse_channel_layout(&aconvert->out_chlayout, aconvert->channel_layout_str, ctx);
return ret;
}
.name = "aconvert",
.description = NULL_IF_CONFIG_SMALL("Convert the input audio to sample_fmt:channel_layout."),
.priv_size = sizeof(AConvertContext),
+ .priv_class = &aconvert_class,
.init = init,
.uninit = uninit,
.query_formats = query_formats,