mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-24 09:10:36 +00:00
Code Issues 1 Projects Releases Wiki Activity

gst/matroska/matroska-demux.c: Some MPEG-AAC hacks, because else it doesn't work...

Browse source 
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (aac_rate_idx), (aac_profile_idx),
(gst_matroska_demux_audio_caps):
Some MPEG-AAC hacks, because else it doesn't work...
This commit is contained in:
Ronald S. Bultje 2004-12-16 22:16:02 +00:00
parent 7e322d1230
commit b76bb4154e
2 changed files with 91 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
ChangeLog
View file

@ -1,3 +1,9 @@
2004-12-16 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* gst/matroska/matroska-demux.c: (aac_rate_idx), (aac_profile_idx),
(gst_matroska_demux_audio_caps):
Some MPEG-AAC hacks, because else it doesn't work...
2004-12-16 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* gst-libs/gst/riff/riff-media.c:

87
gst/matroska/matroska-demux.c
View file

@ -2554,6 +2554,60 @@ gst_matroska_demux_video_caps (GstMatroskaTrackVideoContext * videocontext,
return caps;
}
/*
* Some AAC specific code... *sigh*
*/
static gint
aac_rate_idx (gint rate)
{
if (92017 <= rate)
return 0;
else if (75132 <= rate)
return 1;
else if (55426 <= rate)
return 2;
else if (46009 <= rate)
return 3;
else if (37566 <= rate)
return 4;
else if (27713 <= rate)
return 5;
else if (23004 <= rate)
return 6;
else if (18783 <= rate)
return 7;
else if (13856 <= rate)
return 8;
else if (11502 <= rate)
return 9;
else if (9391 <= rate)
return 10;
else
return 11;
}
static gint
aac_profile_idx (const gchar * codec_id)
{
gint profile;
if (strlen (codec_id) <= 12)
profile = 3;
else if (!strncmp (&codec_id[12], "MAIN", 4))
profile = 0;
else if (!strncmp (&codec_id[12], "LC", 2))
profile = 1;
else if (!strncmp (&codec_id[12], "SSR", 3))
profile = 2;
else
profile = 3;
return profile;
}
#define AAC_SYNC_EXTENSION_TYPE 0x02b7
static GstCaps *
gst_matroska_demux_audio_caps (GstMatroskaTrackAudioContext * audiocontext,
const gchar * codec_id, gpointer data, guint size, GstMatroskaDemux * demux)
@ -2648,18 +2702,47 @@ gst_matroska_demux_audio_caps (GstMatroskaTrackAudioContext * audiocontext,
!strncmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_MPEG4,
strlen (GST_MATROSKA_CODEC_ID_AUDIO_MPEG4))) {
gint mpegversion = -1;
GstBuffer *priv = NULL;
if (!strncmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_MPEG2,
strlen (GST_MATROSKA_CODEC_ID_AUDIO_MPEG2)))
mpegversion = 2;
else if (!strncmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_MPEG4,
strlen (GST_MATROSKA_CODEC_ID_AUDIO_MPEG4)))
strlen (GST_MATROSKA_CODEC_ID_AUDIO_MPEG4))) {
gint rate_idx, profile;
guint8 *data;
mpegversion = 4;
else
if (audiocontext) {
/* make up decoderspecificdata */
priv = gst_buffer_new_and_alloc (5);
data = GST_BUFFER_DATA (priv);
rate_idx = aac_rate_idx (audiocontext->samplerate);
profile = aac_profile_idx (codec_id);
data[0] = ((profile + 1) << 3) | ((rate_idx & 0xE) >> 1);
data[1] = ((rate_idx & 0x1) << 7) | (audiocontext->channels << 3);
if (g_strrstr (codec_id, "SBR")) {
/* HE-AAC (aka SBR AAC) */
audiocontext->samplerate *= 2;
rate_idx = aac_rate_idx (audiocontext->samplerate);
data[2] = AAC_SYNC_EXTENSION_TYPE >> 3;
data[3] = ((AAC_SYNC_EXTENSION_TYPE & 0x07) << 5) | 5;
data[4] = (1 << 7) | (rate_idx << 3);
} else {
GST_BUFFER_SIZE (priv) = 2;
}
}
} else
g_assert (0);
caps = gst_caps_new_simple ("audio/mpeg",
"mpegversion", G_TYPE_INT, mpegversion, NULL);
if (priv) {
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, priv, NULL);
}
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_TTA)) {
if (audiocontext != NULL) {
caps = gst_caps_new_simple ("audio/x-tta",