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opusdec: read pre-skip from first header if available

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This commit is contained in:
Vincent Penquerc'h 2011-11-21 12:50:22 +00:00
parent 9759d66407
commit b98cc2d092
2 changed files with 13 additions and 0 deletions
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12
ext/opus/gstopusdec.c
View file

@ -77,6 +77,8 @@ static GstFlowReturn gst_opus_dec_handle_frame (GstAudioDecoder * dec,
GstBuffer * buffer);
static gboolean gst_opus_dec_set_format (GstAudioDecoder * bdec,
GstCaps * caps);
static gboolean gst_opus_dec_is_header (GstBuffer * buf, const char *magic,
guint magic_size);
static void
gst_opus_dec_base_init (gpointer g_class)
@ -122,6 +124,8 @@ gst_opus_dec_reset (GstOpusDec * dec)
gst_buffer_replace (&dec->streamheader, NULL);
gst_buffer_replace (&dec->vorbiscomment, NULL);
dec->pre_skip = 0;
}
static void
@ -159,9 +163,17 @@ gst_opus_dec_stop (GstAudioDecoder * dec)
static GstFlowReturn
gst_opus_dec_parse_header (GstOpusDec * dec, GstBuffer * buf)
{
g_return_val_if_fail (gst_opus_dec_is_header (buf, "OpusHead", 8),
GST_FLOW_ERROR);
g_return_val_if_fail (GST_BUFFER_SIZE (buf) >= 19, GST_FLOW_ERROR);
dec->pre_skip = GST_READ_UINT16_LE (GST_BUFFER_DATA (buf) + 10);
GST_DEBUG_OBJECT (dec, "Found pre-skip of %u samples", dec->pre_skip);
return GST_FLOW_OK;
}
static GstFlowReturn
gst_opus_dec_parse_comments (GstOpusDec * dec, GstBuffer * buf)
{

1
ext/opus/gstopusdec.h
View file

@ -53,6 +53,7 @@ struct _GstOpusDec {
int sample_rate;
int n_channels;
guint32 pre_skip;
};
struct _GstOpusDecClass {