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lamemp3enc: Tell GstAudioEncoder about the number of incoming samples

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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.:
This commit is contained in:
Olivier Crête 2013-05-09 19:40:49 -04:00
parent 86d714bd71
commit 365b99e66a
1 changed files with 9 additions and 1 deletions
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10
ext/lame/gstlamemp3enc.c
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@ -653,6 +653,7 @@ gst_lamemp3enc_finish_frames (GstLameMP3Enc * lame)
guint rate, version, layer, size; guint rate, version, layer, size;
GstBuffer *mp3_buf; GstBuffer *mp3_buf;
const guint8 *data; const guint8 *data;
guint samples_per_frame;
data = gst_adapter_map (lame->adapter, 4); data = gst_adapter_map (lame->adapter, 4);
header = GST_READ_UINT32_BE (data); header = GST_READ_UINT32_BE (data);
@ -677,11 +678,18 @@ gst_lamemp3enc_finish_frames (GstLameMP3Enc * lame)
break; 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 */ /* should be ok now */
mp3_buf = gst_adapter_take_buffer (lame->adapter, size); mp3_buf = gst_adapter_take_buffer (lame->adapter, size);
/* number of samples for MPEG-1, layer 3 */ /* number of samples for MPEG-1, layer 3 */
result = gst_audio_encoder_finish_frame (GST_AUDIO_ENCODER (lame), result = gst_audio_encoder_finish_frame (GST_AUDIO_ENCODER (lame),
mp3_buf, version == 1 ? 1152 : 576); mp3_buf, samples_per_frame);
} }
exit: exit: