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codecparsers: first video_packet_header doesn't start with resync_marker

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Zhao Halley 2011-12-06 08:55:19 +08:00 committed by Thibault Saunier
parent 5aaf56af29
commit 4960d27d73
1 changed files with 13 additions and 3 deletions
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16
gst-libs/gst/codecparsers/gstmpeg4parser.c
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@ -364,7 +364,8 @@ compute_resync_marker_size (const GstMpeg4VideoObjectPlane * vop,
*/ */
static GstMpeg4ParseResult static GstMpeg4ParseResult
gst_mpeg4_next_resync (GstMpeg4Packet * packet, gst_mpeg4_next_resync (GstMpeg4Packet * packet,
const GstMpeg4VideoObjectPlane * vop, const guint8 * data, gsize size) const GstMpeg4VideoObjectPlane * vop, const guint8 * data, gsize size,
gboolean first_resync_marker)
{ {
guint markersize = 0, off1, off2; guint markersize = 0, off1, off2;
guint32 mask = 0xff, pattern = 0xff; guint32 mask = 0xff, pattern = 0xff;
@ -377,7 +378,11 @@ gst_mpeg4_next_resync (GstMpeg4Packet * packet,
markersize = compute_resync_marker_size (vop, &pattern, &mask); markersize = compute_resync_marker_size (vop, &pattern, &mask);
off1 = gst_byte_reader_masked_scan_uint32 (&br, mask, pattern, 0, size); if (first_resync_marker) {
off1 = 0;
} else {
off1 = gst_byte_reader_masked_scan_uint32 (&br, mask, pattern, 0, size);
}
if (off1 == -1) if (off1 == -1)
return GST_MPEG4_PARSER_NO_PACKET; return GST_MPEG4_PARSER_NO_PACKET;
@ -425,6 +430,7 @@ gst_mpeg4_parse (GstMpeg4Packet * packet, gboolean skip_user_data,
gint off1, off2; gint off1, off2;
GstByteReader br; GstByteReader br;
GstMpeg4ParseResult resync_res; GstMpeg4ParseResult resync_res;
static guint first_resync_marker = TRUE;
gst_byte_reader_init (&br, data, size); gst_byte_reader_init (&br, data, size);
@ -438,7 +444,9 @@ gst_mpeg4_parse (GstMpeg4Packet * packet, gboolean skip_user_data,
if (vop) { if (vop) {
resync_res = resync_res =
gst_mpeg4_next_resync (packet, vop, data + offset, size - offset); gst_mpeg4_next_resync (packet, vop, data + offset, size - offset,
first_resync_marker);
first_resync_marker = FALSE;
/* We found a complet slice */ /* We found a complet slice */
if (resync_res == GST_MPEG4_PARSER_OK) if (resync_res == GST_MPEG4_PARSER_OK)
@ -449,6 +457,8 @@ gst_mpeg4_parse (GstMpeg4Packet * packet, gboolean skip_user_data,
goto find_end; goto find_end;
} else if (resync_res == GST_MPEG4_PARSER_NO_PACKET) } else if (resync_res == GST_MPEG4_PARSER_NO_PACKET)
return resync_res; return resync_res;
} else {
first_resync_marker = TRUE;
} }
off1 = gst_byte_reader_masked_scan_uint32 (&br, 0xffffff00, 0x00000100, off1 = gst_byte_reader_masked_scan_uint32 (&br, 0xffffff00, 0x00000100,