void MpegL2Codec::encodeData(Connector *conn,const float *pcm,int frames)
{
#ifdef HAVE_TWOLAME
int s;
unsigned char mpeg[8640];
if((s=twolame_encode_buffer_float32_interleaved(twolame_lameopts,pcm,frames,
mpeg,8640))>=0) {
conn->writeData(frames,mpeg,s);
}
#endif // HAVE_TWOLAME
}
// Encode a packet's payload
size_t MastCodec_MPA::encode_packet_internal(
size_t inputsize, /* input size in frames */
mast_sample_t *input,
size_t outputsize, /* output size in bytes */
u_int8_t *output)
{
int bytes_encoded = 0;
// MPEG Audio header is 4 bytes at the start of the packet
output[0] = 0x00;
output[1] = 0x00;
output[2] = 0x00;
output[3] = 0x00;
// Encode the audio using twolame
bytes_encoded = twolame_encode_buffer_float32_interleaved( this->twolame, input, inputsize, output+4, outputsize-4 );
//MAST_DEBUG( "mast_encode_mpa: encoded %d samples to %d bytes (max %d bytes)", inputsize, bytes_encoded, outputsize );
return bytes_encoded+4;
}
static GstFlowReturn
gst_two_lame_chain (GstPad * pad, GstBuffer * buf)
{
GstTwoLame *twolame;
guchar *mp3_data;
gint mp3_buffer_size, mp3_size;
gint64 duration;
GstFlowReturn result;
gint num_samples;
guint8 *data;
guint size;
twolame = GST_TWO_LAME (GST_PAD_PARENT (pad));
GST_LOG_OBJECT (twolame, "entered chain");
if (!twolame->setup)
goto not_setup;
data = GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
if (twolame->float_input)
num_samples = size / 4;
else
num_samples = size / 2;
/* allocate space for output */
mp3_buffer_size = 1.25 * num_samples + 16384;
mp3_data = g_malloc (mp3_buffer_size);
if (twolame->num_channels == 1) {
if (twolame->float_input)
mp3_size = twolame_encode_buffer_float32 (twolame->glopts,
(float *) data,
(float *) data, num_samples, mp3_data, mp3_buffer_size);
else
mp3_size = twolame_encode_buffer (twolame->glopts,
(short int *) data,
(short int *) data, num_samples, mp3_data, mp3_buffer_size);
} else {
if (twolame->float_input)
mp3_size = twolame_encode_buffer_float32_interleaved (twolame->glopts,
(float *) data,
num_samples / twolame->num_channels, mp3_data, mp3_buffer_size);
else
mp3_size = twolame_encode_buffer_interleaved (twolame->glopts,
(short int *) data,
num_samples / twolame->num_channels, mp3_data, mp3_buffer_size);
}
GST_LOG_OBJECT (twolame, "encoded %d bytes of audio to %d bytes of mp3",
size, mp3_size);
if (twolame->float_input)
duration = gst_util_uint64_scale_int (size, GST_SECOND,
4 * twolame->samplerate * twolame->num_channels);
else
duration = gst_util_uint64_scale_int (size, GST_SECOND,
2 * twolame->samplerate * twolame->num_channels);
if (GST_BUFFER_DURATION (buf) != GST_CLOCK_TIME_NONE &&
GST_BUFFER_DURATION (buf) != duration) {
GST_DEBUG_OBJECT (twolame, "incoming buffer had incorrect duration %"
GST_TIME_FORMAT ", outgoing buffer will have correct duration %"
GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_TIME_ARGS (duration));
}
if (twolame->last_ts == GST_CLOCK_TIME_NONE) {
twolame->last_ts = GST_BUFFER_TIMESTAMP (buf);
twolame->last_offs = GST_BUFFER_OFFSET (buf);
twolame->last_duration = duration;
} else {
twolame->last_duration += duration;
}
gst_buffer_unref (buf);
if (mp3_size < 0) {
g_warning ("error %d", mp3_size);
}
if (mp3_size > 0) {
GstBuffer *outbuf;
outbuf = gst_buffer_new ();
GST_BUFFER_DATA (outbuf) = mp3_data;
GST_BUFFER_MALLOCDATA (outbuf) = mp3_data;
GST_BUFFER_SIZE (outbuf) = mp3_size;
GST_BUFFER_TIMESTAMP (outbuf) = twolame->last_ts;
GST_BUFFER_OFFSET (outbuf) = twolame->last_offs;
GST_BUFFER_DURATION (outbuf) = twolame->last_duration;
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (twolame->srcpad));
result = gst_pad_push (twolame->srcpad, outbuf);
twolame->last_flow = result;
if (result != GST_FLOW_OK) {
GST_DEBUG_OBJECT (twolame, "flow return: %s", gst_flow_get_name (result));
}
if (GST_CLOCK_TIME_IS_VALID (twolame->last_ts))
twolame->eos_ts = twolame->last_ts + twolame->last_duration;
else
twolame->eos_ts = GST_CLOCK_TIME_NONE;
twolame->last_ts = GST_CLOCK_TIME_NONE;
} else {
g_free (mp3_data);
result = GST_FLOW_OK;
}
return result;
/* ERRORS */
not_setup:
{
gst_buffer_unref (buf);
GST_ELEMENT_ERROR (twolame, CORE, NEGOTIATION, (NULL),
("encoder not initialized (input is not audio?)"));
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_two_lame_handle_frame (GstAudioEncoder * enc, GstBuffer * buf)
{
GstTwoLame *twolame;
gint mp3_buffer_size, mp3_size;
GstBuffer *mp3_buf;
GstFlowReturn result;
gint num_samples;
GstMapInfo map, mp3_map;
twolame = GST_TWO_LAME (enc);
/* squeeze remaining and push */
if (G_UNLIKELY (buf == NULL))
return gst_two_lame_flush_full (twolame, TRUE);
gst_buffer_map (buf, &map, GST_MAP_READ);
if (twolame->float_input)
num_samples = map.size / 4;
else
num_samples = map.size / 2;
/* allocate space for output */
mp3_buffer_size = 1.25 * num_samples + 16384;
mp3_buf = gst_buffer_new_and_alloc (mp3_buffer_size);
gst_buffer_map (mp3_buf, &mp3_map, GST_MAP_WRITE);
if (twolame->num_channels == 1) {
if (twolame->float_input)
mp3_size = twolame_encode_buffer_float32 (twolame->glopts,
(float *) map.data,
(float *) map.data, num_samples, mp3_map.data, mp3_buffer_size);
else
mp3_size = twolame_encode_buffer (twolame->glopts,
(short int *) map.data,
(short int *) map.data, num_samples, mp3_map.data, mp3_buffer_size);
} else {
if (twolame->float_input)
mp3_size = twolame_encode_buffer_float32_interleaved (twolame->glopts,
(float *) map.data,
num_samples / twolame->num_channels, mp3_map.data, mp3_buffer_size);
else
mp3_size = twolame_encode_buffer_interleaved (twolame->glopts,
(short int *) map.data,
num_samples / twolame->num_channels, mp3_map.data, mp3_buffer_size);
}
GST_LOG_OBJECT (twolame, "encoded %" G_GSIZE_FORMAT " bytes of audio "
"to %d bytes of mp3", map.size, mp3_size);
gst_buffer_unmap (buf, &map);
gst_buffer_unmap (mp3_buf, &mp3_map);
if (mp3_size > 0) {
gst_buffer_set_size (mp3_buf, mp3_size);
result = gst_audio_encoder_finish_frame (enc, mp3_buf, -1);
} else {
if (mp3_size < 0) {
/* eat error ? */
g_warning ("error %d", mp3_size);
}
gst_buffer_unref (mp3_buf);
result = GST_FLOW_OK;
}
return result;
}
