* null audio source
*/
+#include <inttypes.h>
+#include <stdio.h>
+
+#include "libavutil/channel_layout.h"
+#include "libavutil/internal.h"
#include "avfilter.h"
#include "internal.h"
-#include "libavutil/audioconvert.h"
-
-typedef struct {
- uint64_t channel_layout;
- int64_t sample_rate;
-} ANullContext;
-
-static int init(AVFilterContext *ctx, const char *args)
-{
- ANullContext *priv = ctx->priv;
- char channel_layout_str[128] = "";
-
- priv->sample_rate = 44100;
- priv->channel_layout = AV_CH_LAYOUT_STEREO;
-
- if (args)
- sscanf(args, "%"PRId64":%s", &priv->sample_rate, channel_layout_str);
-
- if (priv->sample_rate < 0) {
- av_log(ctx, AV_LOG_ERROR, "Invalid negative sample rate: %"PRId64"\n", priv->sample_rate);
- return AVERROR(EINVAL);
- }
-
- if (*channel_layout_str)
- if (!(priv->channel_layout = av_get_channel_layout(channel_layout_str))
- && sscanf(channel_layout_str, "%"PRId64, &priv->channel_layout) != 1) {
- av_log(ctx, AV_LOG_ERROR, "Invalid value '%s' for channel layout\n",
- channel_layout_str);
- return AVERROR(EINVAL);
- }
-
- return 0;
-}
-
-static int config_props(AVFilterLink *outlink)
-{
- ANullContext *priv = outlink->src->priv;
- char buf[128];
- int chans_nb;
-
- outlink->sample_rate = priv->sample_rate;
- outlink->channel_layout = priv->channel_layout;
-
- chans_nb = av_get_channel_layout_nb_channels(priv->channel_layout);
- av_get_channel_layout_string(buf, sizeof(buf), chans_nb, priv->channel_layout);
- av_log(outlink->src, AV_LOG_VERBOSE,
- "sample_rate:%"PRId64 " channel_layout:%"PRId64 " channel_layout_description:'%s'\n",
- priv->sample_rate, priv->channel_layout, buf);
-
- return 0;
-}
static int request_frame(AVFilterLink *link)
{
- return -1;
+ return AVERROR_EOF;
}
-AVFilter avfilter_asrc_anullsrc = {
+static const AVFilterPad avfilter_asrc_anullsrc_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .request_frame = request_frame,
+ },
+ { NULL }
+};
+
+AVFilter ff_asrc_anullsrc = {
.name = "anullsrc",
.description = NULL_IF_CONFIG_SMALL("Null audio source, never return audio frames."),
- .init = init,
- .priv_size = sizeof(ANullContext),
-
- .inputs = (const AVFilterPad[]) {{ .name = NULL}},
+ .inputs = NULL,
- .outputs = (const AVFilterPad[]) {{ .name = "default",
- .type = AVMEDIA_TYPE_AUDIO,
- .config_props = config_props,
- .request_frame = request_frame, },
- { .name = NULL}},
+ .outputs = avfilter_asrc_anullsrc_outputs,
};