static GstFlowReturn
gst_mulawenc_handle_frame (GstAudioEncoder * audioenc, GstBuffer * buffer)
{
GstMuLawEnc *mulawenc;
GstMapInfo inmap, outmap;
gint16 *linear_data;
gsize linear_size;
guint8 *mulaw_data;
guint mulaw_size;
GstBuffer *outbuf;
GstFlowReturn ret;
if (!buffer) {
ret = GST_FLOW_OK;
goto done;
}
mulawenc = GST_MULAWENC (audioenc);
if (!mulawenc->rate || !mulawenc->channels)
goto not_negotiated;
gst_buffer_map (buffer, &inmap, GST_MAP_READ);
linear_data = (gint16 *) inmap.data;
linear_size = inmap.size;
mulaw_size = linear_size / 2;
outbuf = gst_audio_encoder_allocate_output_buffer (audioenc, mulaw_size);
g_assert (outbuf);
gst_buffer_map (outbuf, &outmap, GST_MAP_WRITE);
mulaw_data = outmap.data;
mulaw_encode (linear_data, mulaw_data, mulaw_size);
gst_buffer_unmap (outbuf, &outmap);
gst_buffer_unmap (buffer, &inmap);
ret = gst_audio_encoder_finish_frame (audioenc, outbuf, -1);
done:
return ret;
not_negotiated:
{
GST_DEBUG_OBJECT (mulawenc, "no format negotiated");
ret = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
}
static GstFlowReturn
gst_mulawenc_chain (GstPad * pad, GstBuffer * buffer)
{
GstMuLawEnc *mulawenc;
gint16 *linear_data;
guint linear_size;
guint8 *mulaw_data;
guint mulaw_size;
GstBuffer *outbuf;
GstFlowReturn ret;
GstClockTime timestamp, duration;
mulawenc = GST_MULAWENC (gst_pad_get_parent (pad));
if (!mulawenc->rate || !mulawenc->channels)
goto not_negotiated;
linear_data = (gint16 *) GST_BUFFER_DATA (buffer);
linear_size = GST_BUFFER_SIZE (buffer);
mulaw_size = linear_size / 2;
timestamp = GST_BUFFER_TIMESTAMP (buffer);
duration = GST_BUFFER_DURATION (buffer);
ret = gst_pad_alloc_buffer_and_set_caps (mulawenc->srcpad,
GST_BUFFER_OFFSET_NONE, mulaw_size, GST_PAD_CAPS (mulawenc->srcpad),
&outbuf);
if (ret != GST_FLOW_OK)
goto alloc_failed;
if (duration == -1) {
duration = gst_util_uint64_scale_int (mulaw_size,
GST_SECOND, mulawenc->rate * mulawenc->channels);
}
if (GST_BUFFER_SIZE (outbuf) < mulaw_size) {
/* pad-alloc can suggest a smaller size */
gst_buffer_unref (outbuf);
outbuf = gst_buffer_new_and_alloc (mulaw_size);
}
mulaw_data = (guint8 *) GST_BUFFER_DATA (outbuf);
/* copy discont flag */
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
GST_BUFFER_DURATION (outbuf) = duration;
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (mulawenc->srcpad));
mulaw_encode (linear_data, mulaw_data, mulaw_size);
gst_buffer_unref (buffer);
ret = gst_pad_push (mulawenc->srcpad, outbuf);
done:
gst_object_unref (mulawenc);
return ret;
not_negotiated:
{
GST_DEBUG_OBJECT (mulawenc, "no format negotiated");
ret = GST_FLOW_NOT_NEGOTIATED;
gst_buffer_unref (buffer);
goto done;
}
alloc_failed:
{
GST_DEBUG_OBJECT (mulawenc, "pad alloc failed");
gst_buffer_unref (buffer);
goto done;
}
}
