lamemp3enc: Tell GstAudioEncoder about the number of incoming samples

lame does internal resampling, but the base class only cares about
the number of raw samples, so tell finish frames about that, not
the number of samples in the outgoing frame.:

diff --git a/ext/lame/gstlamemp3enc.c b/ext/lame/gstlamemp3enc.c
index 3c16b29..ee528be 100644 (file)
--- a/ext/lame/gstlamemp3enc.c
+++ b/ext/lame/gstlamemp3enc.c
@@ -653,6 +653,7 @@ gst_lamemp3enc_finish_frames (GstLameMP3Enc * lame)
     guint rate, version, layer, size;
     GstBuffer *mp3_buf;
     const guint8 *data;
+    guint samples_per_frame;
 
     data = gst_adapter_map (lame->adapter, 4);
     header = GST_READ_UINT32_BE (data);
@@ -677,11 +678,18 @@ gst_lamemp3enc_finish_frames (GstLameMP3Enc * lame)
       break;
     }
 
+    /* Account for the internal resampling, finish frame really wants to
+     * know about the number of incoming samples
+     */
+    samples_per_frame = (version == 1) ? 1152 : 576;
+    samples_per_frame *= lame->samplerate;
+    samples_per_frame /= lame->out_samplerate;
+
     /* should be ok now */
     mp3_buf = gst_adapter_take_buffer (lame->adapter, size);
     /* number of samples for MPEG-1, layer 3 */
     result = gst_audio_encoder_finish_frame (GST_AUDIO_ENCODER (lame),
-        mp3_buf, version == 1 ? 1152 : 576);
+        mp3_buf, samples_per_frame);
   }
 
 exit: