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flvdemux: fix speex audio decoding by creating fake stream header

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=683622
This commit is contained in:
Dmitriy Samonenko 2012-09-10 10:27:28 +04:00 committed by Tim-Philipp Müller
parent 626e0258e3
commit 7d4b6f655e
1 changed files with 65 additions and 0 deletions
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65
gst/flv/gstflvdemux.c
View file

@ -714,7 +714,72 @@ gst_flv_demux_audio_negotiate (GstFlvDemux * demux, guint32 codec_tag,
caps = gst_caps_new_empty_simple ("audio/x-mulaw");
break;
case 11:
{
GValue streamheader = G_VALUE_INIT;
GValue value = G_VALUE_INIT;
GstStructure *structure;
GstBuffer *buf;
guint8 *data, *mallocdata;
g_value_init (&streamheader, GST_TYPE_ARRAY);
caps = gst_caps_new_empty_simple ("audio/x-speex");
structure = gst_caps_get_structure (caps, 0);
data = mallocdata = g_malloc (80);
GST_DEBUG_OBJECT (demux, "generating speex header");
memcpy (data, "Speex ", 8);
data += 8;
memcpy (data, "1.1.12", 7);
data += 20;
GST_WRITE_UINT32_LE (data, 1); /* version */
data += 4;
GST_WRITE_UINT32_LE (data, 80); /* header_size */
data += 4;
GST_WRITE_UINT32_LE (data, 16000); /* rate */
data += 4;
GST_WRITE_UINT32_LE (data, 1); /* mode: Wideband */
data += 4;
GST_WRITE_UINT32_LE (data, 4); /* mode_bitstream_version */
data += 4;
GST_WRITE_UINT32_LE (data, 1); /* nb_channels: 1 */
data += 4;
GST_WRITE_UINT32_LE (data, -1); /* bitrate */
data += 4;
GST_WRITE_UINT32_LE (data, 0x50); /* frame_size */
data += 4;
GST_WRITE_UINT32_LE (data, 0); /* VBR */
data += 4;
GST_WRITE_UINT32_LE (data, 1); /* frames_per_packet */
data += 4;
GST_WRITE_UINT32_LE (data, 0); /* extra_headers */
data += 4;
GST_WRITE_UINT32_LE (data, 0); /* reserved1 */
data += 4;
GST_WRITE_UINT32_LE (data, 0); /* reserved2 */
buf = gst_buffer_new_wrapped (mallocdata, 80);
g_value_init (&value, GST_TYPE_BUFFER); /* Speex decoder expects it to be { [header], [comment] } */
gst_value_set_buffer (&value, buf); /* setting header part */
gst_value_array_append_value (&streamheader, &value);
g_value_unset (&value);
gst_buffer_unref (buf);
data = mallocdata = g_malloc (12); /* setting comment part */
memcpy (data, "No comments", 12);
g_value_init (&value, GST_TYPE_BUFFER);
buf = gst_buffer_new_wrapped (mallocdata, 12);
gst_value_set_buffer (&value, buf);
gst_value_array_append_value (&streamheader, &value);
g_value_unset (&value);
gst_buffer_unref (buf);
gst_structure_set_value (structure, "streamheader", &streamheader);
}
break;
default:
GST_WARNING_OBJECT (demux, "unsupported audio codec tag %u", codec_tag);