static GstFlowReturn
gst_ffmpegaudioresample_transform (GstBaseTransform * trans, GstBuffer * inbuf,
GstBuffer * outbuf)
{
GstFFMpegAudioResample *resample = GST_FFMPEGAUDIORESAMPLE (trans);
gint nbsamples;
gint ret;
gst_buffer_copy_metadata (outbuf, inbuf, GST_BUFFER_COPY_TIMESTAMPS);
nbsamples = GST_BUFFER_SIZE (inbuf) / (2 * resample->in_channels);
GST_LOG_OBJECT (resample, "input buffer duration:%" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_DURATION (inbuf)));
GST_DEBUG_OBJECT (resample,
"audio_resample(ctx, output:%p [size:%d], input:%p [size:%d], nbsamples:%d",
GST_BUFFER_DATA (outbuf), GST_BUFFER_SIZE (outbuf),
GST_BUFFER_DATA (inbuf), GST_BUFFER_SIZE (inbuf), nbsamples);
ret = audio_resample (resample->res, (short *) GST_BUFFER_DATA (outbuf),
(short *) GST_BUFFER_DATA (inbuf), nbsamples);
GST_DEBUG_OBJECT (resample, "audio_resample returned %d", ret);
GST_BUFFER_DURATION (outbuf) = gst_util_uint64_scale (ret, GST_SECOND,
resample->out_rate);
GST_BUFFER_SIZE (outbuf) = ret * 2 * resample->out_channels;
GST_LOG_OBJECT (resample, "Output buffer duration:%" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)));
return GST_FLOW_OK;
}
static gboolean
gst_ffmpegaudioresample_set_caps (GstBaseTransform * trans, GstCaps * incaps,
GstCaps * outcaps)
{
GstFFMpegAudioResample *resample = GST_FFMPEGAUDIORESAMPLE (trans);
GstStructure *instructure = gst_caps_get_structure (incaps, 0);
GstStructure *outstructure = gst_caps_get_structure (outcaps, 0);
GST_LOG_OBJECT (resample, "incaps:%" GST_PTR_FORMAT, incaps);
GST_LOG_OBJECT (resample, "outcaps:%" GST_PTR_FORMAT, outcaps);
if (!gst_structure_get_int (instructure, "channels", &resample->in_channels))
return FALSE;
if (!gst_structure_get_int (instructure, "rate", &resample->in_rate))
return FALSE;
if (!gst_structure_get_int (outstructure, "channels",
&resample->out_channels))
return FALSE;
if (!gst_structure_get_int (outstructure, "rate", &resample->out_rate))
return FALSE;
/* FIXME : Allow configuring the various resampling properties */
#define TAPS 16
resample->res =
av_audio_resample_init (resample->out_channels, resample->in_channels,
resample->out_rate, resample->in_rate,
AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16, TAPS, 10, 0, 0.8);
if (resample->res == NULL)
return FALSE;
return TRUE;
}
static gboolean
gst_ffmpegaudioresample_set_caps (GstBaseTransform * trans, GstCaps * incaps,
GstCaps * outcaps)
{
GstFFMpegAudioResample *resample = GST_FFMPEGAUDIORESAMPLE (trans);
GstStructure *instructure = gst_caps_get_structure (incaps, 0);
GstStructure *outstructure = gst_caps_get_structure (outcaps, 0);
GST_LOG_OBJECT (resample, "incaps:%" GST_PTR_FORMAT, incaps);
GST_LOG_OBJECT (resample, "outcaps:%" GST_PTR_FORMAT, outcaps);
if (!gst_structure_get_int (instructure, "channels", &resample->in_channels))
return FALSE;
if (!gst_structure_get_int (instructure, "rate", &resample->in_rate))
return FALSE;
if (!gst_structure_get_int (outstructure, "channels",
&resample->out_channels))
return FALSE;
if (!gst_structure_get_int (outstructure, "rate", &resample->out_rate))
return FALSE;
resample->res =
audio_resample_init (resample->out_channels, resample->in_channels,
resample->out_rate, resample->in_rate);
if (resample->res == NULL)
return FALSE;
return TRUE;
}
static void
gst_ffmpegaudioresample_finalize (GObject * object)
{
GstFFMpegAudioResample *resample = GST_FFMPEGAUDIORESAMPLE (object);
if (resample->res != NULL)
audio_resample_close (resample->res);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
