mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-27 04:01:08 +00:00
Code Issues 1 Projects Releases Wiki Activity

codecparsers: Move shared code to a parser utils file

Browse source
This commit is contained in:
Thibault Saunier 2011-09-21 19:40:47 -03:00
parent fbe30dd2ea
commit 4439048e4a
5 changed files with 171 additions and 107 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
gst-libs/gst/codecparsers/Makefile.am
View file

@ -1,11 +1,13 @@
lib_LTLIBRARIES = libgstcodecparsers-@GST_MAJORMINOR@.la
libgstcodecparsers_@GST_MAJORMINOR@_la_SOURCES = \
gstmpegvideoparser.c gsth264parser.c gstvc1parser.c
gstmpegvideoparser.c gsth264parser.c gstvc1parser.c parserutils.c
libgstcodecparsers_@GST_MAJORMINOR@includedir = \
$(includedir)/gstreamer-@GST_MAJORMINOR@/gst/codecparsers
noinst_HEADERS = parserutils.h
libgstcodecparsers_@GST_MAJORMINOR@include_HEADERS = \
gstmpegvideoparser.h gsth264parser.h gstvc1parser.h

28
gst-libs/gst/codecparsers/gstmpegvideoparser.c
View file

@ -40,6 +40,7 @@
#endif
#include "gstmpegvideoparser.h"
#include "parserutils.h"
#include <string.h>
#include <gst/base/gstbitreader.h>
@ -47,33 +48,6 @@
#define MARKER_BIT 0x1
#define GET_BITS(b, num, bits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint32(b, bits, num)) \
goto failed; \
GST_TRACE ("parsed %d bits: %d", num, *(bits)); \
} G_STMT_END
#define READ_UINT8(br, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint8 (br, &val, nbits)) { \
GST_WARNING ("failed to read uint8, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
#define READ_UINT16(br, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint16 (br, &val, nbits)) { \
GST_WARNING ("failed to read uint16, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
#define READ_UINT32(br, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint32 (br, &val, nbits)) { \
GST_WARNING ("failed to read uint32, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
/* default intra quant matrix, in zig-zag order */
const guint8 default_intra_quantizer_matrix[64] = {
8,

81
gst-libs/gst/codecparsers/gstvc1parser.c
View file

@ -33,6 +33,7 @@
#endif
#include "gstvc1parser.h"
#include "parserutils.h"
#include <gst/base/gstbytereader.h>
#include <gst/base/gstbitreader.h>
#include <string.h>
@ -64,49 +65,6 @@ ensure_debug_category (void)
#endif /* GST_DISABLE_GST_DEBUG */
/* ------------------------------------------------------------------------- */
#define GET_BITS(b, num, bits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint32(b, bits, num)) \
goto failed; \
GST_TRACE ("parsed %d bits: %d", num, *(bits)); \
} G_STMT_END
#define READ_UINT8(br, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint8 (br, &val, nbits)) { \
GST_WARNING ("failed to read uint8, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
#define READ_UINT16(br, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint16 (br, &val, nbits)) { \
GST_WARNING ("failed to read uint16, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
#define READ_UINT32(br, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint32 (br, &val, nbits)) { \
GST_WARNING ("failed to read uint32, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
#define SKIP(br, nbits) G_STMT_START { \
if (!gst_bit_reader_skip (br, nbits)) { \
GST_WARNING ("Failed to skip nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
typedef struct _VLCTable
{
guint value;
guint cword;
guint cbits;
} VLCTable;
const guint8 vc1_pquant_table[3][32] = {
{ /* Implicit quantizer */
0, 1, 2, 3, 4, 5, 6, 7, 8, 6, 7, 8, 9, 10, 11, 12,
@ -468,41 +426,6 @@ failed:
}
}
static gboolean
decode_vlc (GstBitReader * br, guint * res, const VLCTable * table,
guint length)
{
guint8 i;
guint cbits = 0;
guint32 value = 0;
for (i = 0; i < length; i++) {
if (cbits != table[i].cbits) {
cbits = table[i].cbits;
if (!gst_bit_reader_peek_bits_uint32 (br, &value, cbits)) {
goto failed;
}
}
if (value == table[i].cword) {
SKIP (br, cbits);
if (res)
*res = table[i].value;
return TRUE;
}
}
GST_DEBUG ("Did not find code");
failed:
{
GST_WARNING ("Could not decode VLC returning");
return FALSE;
}
}
/*** bitplanes decoding ***/
static gboolean
bitplane_decoding (GstBitReader * br, guint8 * data,
@ -1807,7 +1730,7 @@ gst_vc1_parse_sequence_layer (const guint8 * data, gsize size,
READ_UINT32 (&br, tmp, 32);
if (tmp != 0x04)
goto failed;
if (parse_sequence_header_struct_c (&br, &seqlayer->struct_c) ==
GST_VC1_PARSER_ERROR)
goto failed;

57
gst-libs/gst/codecparsers/parserutils.c Normal file
View file

@ -0,0 +1,57 @@
/* Gstreamer
* Copyright (C) <2011> Intel Corporation
* Copyright (C) <2011> Collabora Ltd.
* Copyright (C) <2011> Thibault Saunier <thibault.saunier@collabora.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "parserutils.h"
gboolean
decode_vlc (GstBitReader * br, guint * res, const VLCTable * table,
guint length)
{
guint8 i;
guint cbits = 0;
guint32 value = 0;
for (i = 0; i < length; i++) {
if (cbits != table[i].cbits) {
cbits = table[i].cbits;
if (!gst_bit_reader_peek_bits_uint32 (br, &value, cbits)) {
goto failed;
}
}
if (value == table[i].cword) {
SKIP (br, cbits);
if (res)
*res = table[i].value;
return TRUE;
}
}
GST_DEBUG ("Did not find code");
failed:
{
GST_WARNING ("Could not decode VLC returning");
return FALSE;
}
}

108
gst-libs/gst/codecparsers/parserutils.h Normal file
View file

@ -0,0 +1,108 @@
/* Gstreamer
* Copyright (C) <2011> Intel
* Copyright (C) <2011> Collabora Ltd.
* Copyright (C) <2011> Thibault Saunier <thibault.saunier@collabora.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __PARSER_UTILS__
#define __PARSER_UTILS__
#include <gst/gst.h>
#include <gst/base/gstbitreader.h>
/* Parsing utils */
#define GET_BITS(b, num, bits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint32(b, bits, num)) \
goto failed; \
GST_TRACE ("parsed %d bits: %d", num, *(bits)); \
} G_STMT_END
#define CHECK_ALLOWED(val, min, max) G_STMT_START { \
if (val < min || val > max) { \
GST_WARNING ("value not in allowed range. value: %d, range %d-%d", \
val, min, max); \
goto failed; \
} \
} G_STMT_END
#define READ_UINT8(reader, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint8 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint8, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
#define READ_UINT16(reader, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint16 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint16, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
#define READ_UINT32(reader, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint32 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint32, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
#define READ_UINT64(reader, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint64 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint64, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
#define U_READ_UINT8(reader, val, nbits) G_STMT_START { \
val = gst_bit_reader_get_bits_uint8_unchecked (reader, nbits); \
} G_STMT_END
#define U_READ_UINT16(reader, val, nbits) G_STMT_START { \
val = gst_bit_reader_get_bits_uint16_unchecked (reader, nbits); \
} G_STMT_END
#define U_READ_UINT32(reader, val, nbits) G_STMT_START { \
val = gst_bit_reader_get_bits_uint32_unchecked (reader, nbits); \
} G_STMT_END
#define U_READ_UINT64(reader, val, nbits) G_STMT_START { \
val = gst_bit_reader_get_bits_uint64_unchecked (reader, nbits); \
} G_STMT_END
#define SKIP(reader, nbits) G_STMT_START { \
if (!gst_bit_reader_skip (reader, nbits)) { \
GST_WARNING ("failed to skip nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
typedef struct _VLCTable VLCTable;
struct _VLCTable
{
guint value;
guint cword;
guint cbits;
};
gboolean
decode_vlc (GstBitReader * br, guint * res, const VLCTable * table,
guint length);
#endif /* __PARSER_UTILS__ */