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oggdemux: Add support for mapping specific granulepos to key granule mapping

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This commit is contained in:
Sebastian Dröge 2010-05-14 11:02:38 +02:00
parent 5fc1309703
commit d6b6d0cdad
1 changed files with 51 additions and 11 deletions
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62
ext/ogg/gstoggstream.c
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@ -56,6 +56,9 @@ typedef gboolean (*GstOggMapIsHeaderPacketFunc) (GstOggStream * pad,
typedef gint64 (*GstOggMapPacketDurationFunc) (GstOggStream * pad,
ogg_packet * packet);
typedef gint64 (*GstOggMapGranuleposToKeyGranuleFunc) (GstOggStream * pad,
gint64 granulepos);
#define SKELETON_FISBONE_MIN_SIZE 52
#define SKELETON_FISHEAD_3_3_MIN_SIZE 112
@ -71,6 +74,7 @@ struct _GstOggMap
GstOggMapIsKeyFrameFunc is_key_frame_func;
GstOggMapIsHeaderPacketFunc is_header_func;
GstOggMapPacketDurationFunc packet_duration_func;
GstOggMapGranuleposToKeyGranuleFunc granulepos_to_key_granule_func;
};
static const GstOggMap mappers[];
@ -141,6 +145,9 @@ gst_ogg_stream_granulepos_to_granule (GstOggStream * pad, gint64 granulepos)
gint64
gst_ogg_stream_granulepos_to_key_granule (GstOggStream * pad, gint64 granulepos)
{
if (mappers[pad->map].granulepos_to_key_granule_func)
return mappers[pad->map].granulepos_to_key_granule_func (pad, granulepos);
if (granulepos == -1 || granulepos == 0) {
return granulepos;
}
@ -546,6 +553,22 @@ packet_duration_vp8 (GstOggStream * pad, ogg_packet * packet)
return (((hdr >> 4) & 1) != 0) ? 1 : 0;
}
static gint64
granulepos_to_key_granule_vp8 (GstOggStream * pad, gint64 granulepos)
{
guint64 gp = granulepos;
guint64 pts = (gp >> 32);
guint32 dist = (gp >> 3) & 0x07ffffff;
if (granulepos == -1 || granulepos == 0)
return granulepos;
if (dist > pts)
return 0;
return pts - dist;
}
/* vorbis */
static gboolean
@ -1445,7 +1468,8 @@ static const GstOggMap mappers[] = {
granule_to_granulepos_default,
is_keyframe_theora,
is_header_theora,
packet_duration_constant
packet_duration_constant,
NULL
},
{
"\001vorbis", 7, 22,
@ -1455,7 +1479,8 @@ static const GstOggMap mappers[] = {
granule_to_granulepos_default,
is_keyframe_true,
is_header_vorbis,
packet_duration_vorbis
packet_duration_vorbis,
NULL
},
{
"Speex", 5, 80,
@ -1465,7 +1490,8 @@ static const GstOggMap mappers[] = {
granule_to_granulepos_default,
is_keyframe_true,
is_header_count,
packet_duration_constant
packet_duration_constant,
NULL
},
{
"PCM ", 8, 0,
@ -1475,6 +1501,7 @@ static const GstOggMap mappers[] = {
NULL,
NULL,
is_header_count,
NULL,
NULL
},
{
@ -1485,6 +1512,7 @@ static const GstOggMap mappers[] = {
NULL,
NULL,
is_header_count,
NULL,
NULL
},
{
@ -1495,6 +1523,7 @@ static const GstOggMap mappers[] = {
granule_to_granulepos_default,
NULL,
is_header_count,
NULL,
NULL
},
{
@ -1505,6 +1534,7 @@ static const GstOggMap mappers[] = {
NULL,
NULL,
is_header_true,
NULL,
NULL
},
{
@ -1515,7 +1545,8 @@ static const GstOggMap mappers[] = {
granule_to_granulepos_default,
is_keyframe_true,
is_header_fLaC,
packet_duration_flac
packet_duration_flac,
NULL
},
{
"\177FLAC", 5, 36,
@ -1525,7 +1556,8 @@ static const GstOggMap mappers[] = {
granule_to_granulepos_default,
is_keyframe_true,
is_header_flac,
packet_duration_flac
packet_duration_flac,
NULL
},
{
"AnxData", 7, 0,
@ -1534,6 +1566,7 @@ static const GstOggMap mappers[] = {
NULL,
NULL,
NULL,
NULL,
NULL
},
{
@ -1544,7 +1577,8 @@ static const GstOggMap mappers[] = {
granule_to_granulepos_default,
NULL,
is_header_count,
packet_duration_constant
packet_duration_constant,
NULL
},
{
"\200kate\0\0\0", 8, 0,
@ -1554,6 +1588,7 @@ static const GstOggMap mappers[] = {
granule_to_granulepos_default,
NULL,
is_header_count,
NULL,
NULL
},
{
@ -1564,7 +1599,8 @@ static const GstOggMap mappers[] = {
granule_to_granulepos_dirac,
is_keyframe_dirac,
is_header_count,
packet_duration_constant
packet_duration_constant,
NULL
},
{
"VP80\1", 5, 4,
@ -1574,7 +1610,8 @@ static const GstOggMap mappers[] = {
granule_to_granulepos_vp8,
is_keyframe_vp8,
is_header_count,
packet_duration_vp8
packet_duration_vp8,
granulepos_to_key_granule_vp8
},
{
"\001audio\0\0\0", 9, 53,
@ -1584,7 +1621,8 @@ static const GstOggMap mappers[] = {
granule_to_granulepos_default,
is_keyframe_true,
is_header_ogm,
packet_duration_ogm
packet_duration_ogm,
NULL
},
{
"\001video\0\0\0", 9, 53,
@ -1594,7 +1632,8 @@ static const GstOggMap mappers[] = {
granule_to_granulepos_default,
NULL,
is_header_ogm,
packet_duration_constant
packet_duration_constant,
NULL
},
{
"\001text\0\0\0", 9, 9,
@ -1604,7 +1643,8 @@ static const GstOggMap mappers[] = {
granule_to_granulepos_default,
is_keyframe_true,
is_header_ogm,
packet_duration_ogm
packet_duration_ogm,
NULL
}
};
/* *INDENT-ON* */