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opusdec: default to stereo 48000 Hz if possible when no headers seen

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=665078
This commit is contained in:
Vincent Penquerc'h 2011-11-28 19:47:34 +00:00
parent 780d774a5d
commit 9a7af231c7
1 changed files with 35 additions and 12 deletions
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47
ext/opus/gstopusdec.c
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@ -213,12 +213,27 @@ gst_opus_dec_get_r128_volume (gint16 r128_gain)
return DB_TO_LINEAR (gst_opus_dec_get_r128_gain (r128_gain));
}
static GstCaps *
gst_opus_dec_negotiate (GstOpusDec * dec)
{
GstCaps *caps = gst_pad_get_allowed_caps (GST_AUDIO_DECODER_SRC_PAD (dec));
GstStructure *s = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (s, "rate", 48000);
gst_structure_get_int (s, "rate", &dec->sample_rate);
gst_structure_fixate_field_nearest_int (s, "channels", dec->n_channels);
gst_structure_get_int (s, "channels", &dec->n_channels);
GST_INFO_OBJECT (dec, "Negotiated %d channels, %d Hz", dec->n_channels,
dec->sample_rate);
return caps;
}
static GstFlowReturn
gst_opus_dec_parse_header (GstOpusDec * dec, GstBuffer * buf)
{
const guint8 *data = GST_BUFFER_DATA (buf);
GstCaps *caps;
GstStructure *s;
const GstAudioChannelPosition *pos = NULL;
g_return_val_if_fail (gst_opus_header_is_id_header (buf), GST_FLOW_ERROR);
@ -280,16 +295,7 @@ gst_opus_dec_parse_header (GstOpusDec * dec, GstBuffer * buf)
}
}
/* negotiate width with downstream */
caps = gst_pad_get_allowed_caps (GST_AUDIO_DECODER_SRC_PAD (dec));
s = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (s, "rate", 48000);
gst_structure_get_int (s, "rate", &dec->sample_rate);
gst_structure_fixate_field_nearest_int (s, "channels", dec->n_channels);
gst_structure_get_int (s, "channels", &dec->n_channels);
GST_INFO_OBJECT (dec, "Negotiated %d channels, %d Hz", dec->n_channels,
dec->sample_rate);
caps = gst_opus_dec_negotiate (dec);
if (pos) {
GST_DEBUG_OBJECT (dec, "Setting channel positions on caps");
@ -307,7 +313,6 @@ gst_opus_dec_parse_header (GstOpusDec * dec, GstBuffer * buf)
return GST_FLOW_OK;
}
static GstFlowReturn
gst_opus_dec_parse_comments (GstOpusDec * dec, GstBuffer * buf)
{
@ -328,6 +333,24 @@ opus_dec_chain_parse_data (GstOpusDec * dec, GstBuffer * buffer)
GstBuffer *buf;
if (dec->state == NULL) {
/* If we did not get any headers, default to 2 channels */
if (dec->n_channels == 0) {
GstCaps *caps;
GST_INFO_OBJECT (dec, "No header, assuming single stream");
dec->n_channels = 2;
dec->sample_rate = 48000;
caps = gst_opus_dec_negotiate (dec);
GST_INFO_OBJECT (dec, "Setting src caps to %" GST_PTR_FORMAT, caps);
gst_pad_set_caps (GST_AUDIO_DECODER_SRC_PAD (dec), caps);
gst_caps_unref (caps);
/* default stereo mapping */
dec->channel_mapping_family = 0;
dec->channel_mapping[0] = 0;
dec->channel_mapping[1] = 1;
dec->n_streams = 1;
dec->n_stereo_streams = 1;
}
GST_DEBUG_OBJECT (dec, "Creating decoder with %d channels, %d Hz",
dec->n_channels, dec->sample_rate);
dec->state = opus_multistream_decoder_create (dec->sample_rate,