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gstreamer/gst-libs/gst/codecparsers/gstvc1parser.c
Tim-Philipp Müller 9e1b75fda3 Fix FSF address 
https://bugzilla.gnome.org/show_bug.cgi?id=687520
2012-11-04 00:09:59 +00:00

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/* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gstvc1parser
* @short_description: Convenience library for parsing vc1 video
* bitstream.
*
* For more details about the structures, look at the
* smpte specifications (S421m-2006.pdf).
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gstvc1parser.h"
#include "parserutils.h"
#include <gst/base/gstbytereader.h>
#include <gst/base/gstbitreader.h>
#include <string.h>
#ifndef GST_DISABLE_GST_DEBUG
#define GST_CAT_DEFAULT ensure_debug_category()
static GstDebugCategory *
ensure_debug_category (void)
{
static gsize cat_gonce = 0;
if (g_once_init_enter (&cat_gonce)) {
gsize cat_done;
cat_done = (gsize) _gst_debug_category_new ("codecparsers_vc1", 0,
"VC1 codec parsing library");
g_once_init_leave (&cat_gonce, cat_done);
}
return (GstDebugCategory *) cat_gonce;
}
#else
#define ensure_debug_category() /* NOOP */
#endif /* GST_DISABLE_GST_DEBUG */
static 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,
13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 29, 31},
{ /* Explicit quantizer, pquantizer uniform */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31},
{ /* Explicit quantizer, pquantizer non-uniform */
0, 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 31}
};
static const guint8 vc1_mvmode_table[2][5] = {
/* Table 47: P Picture High rate (PQUANT <= 12) MVMODE code table */
{
GST_VC1_MVMODE_1MV,
GST_VC1_MVMODE_MIXED_MV,
GST_VC1_MVMODE_1MV_HPEL,
GST_VC1_MVMODE_INTENSITY_COMP,
GST_VC1_MVMODE_1MV_HPEL_BILINEAR},
/* Table 46: P Picture Low rate (PQUANT > 12) MVMODE code table */
{
GST_VC1_MVMODE_1MV_HPEL_BILINEAR,
GST_VC1_MVMODE_1MV,
GST_VC1_MVMODE_1MV_HPEL,
GST_VC1_MVMODE_INTENSITY_COMP,
GST_VC1_MVMODE_MIXED_MV}
};
static const guint8 vc1_mvmode2_table[2][4] = {
/* Table 50: P Picture High rate (PQUANT <= 12) MVMODE2 code table */
{
GST_VC1_MVMODE_1MV,
GST_VC1_MVMODE_MIXED_MV,
GST_VC1_MVMODE_1MV_HPEL,
GST_VC1_MVMODE_1MV_HPEL_BILINEAR},
/* Table 49: P Picture Low rate (PQUANT > 12) MVMODE2 code table */
{
GST_VC1_MVMODE_1MV_HPEL_BILINEAR,
GST_VC1_MVMODE_1MV,
GST_VC1_MVMODE_1MV_HPEL,
GST_VC1_MVMODE_MIXED_MV}
};
/* Table 40: BFRACTION VLC Table */
static const VLCTable vc1_bfraction_vlc_table[] = {
{GST_VC1_BFRACTION_BASIS / 2, 0x00, 3},
{GST_VC1_BFRACTION_BASIS / 3, 0x01, 3},
{(GST_VC1_BFRACTION_BASIS * 2) / 3, 0x02, 3},
{GST_VC1_BFRACTION_BASIS / 4, 0x02, 3},
{(GST_VC1_BFRACTION_BASIS * 3) / 4, 0x04, 3},
{GST_VC1_BFRACTION_BASIS / 5, 0x05, 3},
{(GST_VC1_BFRACTION_BASIS * 2) / 5, 0x06, 3},
{(GST_VC1_BFRACTION_BASIS * 3) / 5, 0x70, 7},
{(GST_VC1_BFRACTION_BASIS * 4) / 5, 0x71, 7},
{GST_VC1_BFRACTION_BASIS / 6, 0x72, 7},
{(GST_VC1_BFRACTION_BASIS * 5) / 6, 0x73, 7},
{GST_VC1_BFRACTION_BASIS / 7, 0x74, 7},
{(GST_VC1_BFRACTION_BASIS * 2) / 7, 0x75, 7},
{(GST_VC1_BFRACTION_BASIS * 3) / 7, 0x76, 7},
{(GST_VC1_BFRACTION_BASIS * 4) / 7, 0x77, 7},
{(GST_VC1_BFRACTION_BASIS * 5) / 7, 0x78, 7},
{(GST_VC1_BFRACTION_BASIS * 6) / 7, 0x79, 7},
{GST_VC1_BFRACTION_BASIS / 8, 0x7a, 7},
{(GST_VC1_BFRACTION_BASIS * 3) / 8, 0x7b, 7},
{(GST_VC1_BFRACTION_BASIS * 5) / 8, 0x7c, 7},
{(GST_VC1_BFRACTION_BASIS * 7) / 8, 0x7d, 7},
{GST_VC1_BFRACTION_RESERVED, 0x7e, 7},
{GST_VC1_BFRACTION_PTYPE_BI, 0x7f, 7}
};
/* Imode types */
enum
{
IMODE_RAW,
IMODE_NORM2,
IMODE_DIFF2,
IMODE_NORM6,
IMODE_DIFF6,
IMODE_ROWSKIP,
IMODE_COLSKIP
};
/* Table 69: IMODE VLC Codetable */
static const VLCTable vc1_imode_vlc_table[] = {
{IMODE_NORM2, 0x02, 2},
{IMODE_NORM6, 0x03, 2},
{IMODE_ROWSKIP, 0x02, 3},
{IMODE_COLSKIP, 0x03, 3},
{IMODE_DIFF2, 0x01, 3},
{IMODE_DIFF6, 0x01, 4},
{IMODE_RAW, 0x00, 4}
};
/* Table 80: Norm-2/Diff-2 Code Table */
static const VLCTable vc1_norm2_vlc_table[4] = {
{0, 0, 1},
{2, 4, 3},
{1, 5, 3},
{3, 3, 2}
};
/* Table 81: Code table for 3x2 and 2x3 tiles */
static const VLCTable vc1_norm6_vlc_table[64] = {
{0, 1, 1},
{1, 2, 4},
{2, 3, 4},
{3, 0, 8},
{4, 4, 4},
{5, 1, 8},
{6, 2, 8},
{7, (2 << 5) | 7, 10},
{8, 5, 4},
{9, 3, 8},
{10, 4, 8},
{11, (2 << 5) | 11, 10},
{12, 5, 8},
{13, (2 << 5) | 13, 10},
{14, (2 << 5) | 14, 10},
{15, (3 << 8) | 14, 13},
{16, 6, 4},
{17, 6, 8},
{18, 7, 8},
{19, (2 << 5) | 19, 10},
{20, 8, 8},
{21, (2 << 5) | 21, 10},
{22, (2 << 5) | 22, 10},
{23, (3 << 8) | 13, 13},
{24, 9, 8},
{25, (2 << 5) | 25, 10},
{26, (2 << 5) | 26, 10},
{27, (3 << 8) | 12, 13},
{28, (2 << 5) | 28, 10},
{29, (3 << 8) | 11, 13},
{30, (3 << 8) | 10, 13},
{31, (3 << 4) | 7, 9},
{32, 7, 4},
{33, 10, 8},
{34, 11, 8},
{35, (2 << 5) | 3, 10},
{36, 12, 8},
{37, (2 << 5) | 5, 10},
{38, (2 << 5) | 6, 10},
{39, (3 << 8) | 9, 13},
{40, 13, 8},
{41, (2 << 5) | 9, 10},
{42, (2 << 5) | 10, 10},
{43, (3 << 8) | 8, 13},
{44, (2 << 5) | 12, 10},
{45, (3 << 8) | 7, 13},
{46, (3 << 8) | 6, 13},
{47, (3 << 4) | 6, 9},
{48, 14, 8},
{49, (2 << 5) | 17, 10},
{50, (2 << 5) | 18, 10},
{51, (3 << 8) | 5, 13},
{52, (2 << 5) | 20, 10},
{53, (3 << 8) | 4, 13},
{54, (3 << 8) | 3, 13},
{55, (3 << 4) | 5, 9},
{56, (2 << 5) | 24, 10},
{57, (3 << 8) | 2, 13},
{58, (3 << 8) | 1, 13},
{59, (3 << 4) | 4, 9},
{60, (3 << 8) | 0, 13},
{61, (3 << 4) | 3, 9},
{62, (3 << 4) | 2, 9},
{63, (3 << 1) | 1, 6}
};
/* SMPTE 421M Table 7 */
typedef struct
{
gint par_n, par_d;
} PAR;
static PAR aspect_ratios[] = {
{0, 0},
{1, 1},
{12, 11},
{10, 11},
{16, 11},
{40, 33},
{24, 11},
{20, 11},
{32, 11},
{80, 33},
{18, 11},
{15, 11},
{64, 33},
{160, 99},
{0, 0},
{0, 0}
};
/* SMPTE 421M Table 8 */
static const guint framerates_n[] = {
0,
24 * 1000,
25 * 1000,
30 * 1000,
50 * 1000,
60 * 1000,
48 * 1000,
72 * 1000
};
/* SMPTE 421M Table 9 */
static const guint framerates_d[] = {
0,
1000,
1001
};
static inline gboolean
decode_colskip (GstBitReader * br, guint8 * data, guint width, guint height,
guint stride, guint invert)
{
guint x, y;
guint8 colskip, v;
GST_DEBUG ("Parsing colskip");
invert &= 1;
for (x = 0; x < width; x++) {
READ_UINT8 (br, colskip, 1);
if (data) {
if (colskip) {
for (y = 0; y < height; y++) {
READ_UINT8 (br, v, 1);
data[y * stride] = v ^ invert;
}
} else {
for (y = 0; y < height; y++)
data[y * stride] = invert;
}
data++;
} else if (colskip)
SKIP (br, height);
}
return TRUE;
failed:
GST_WARNING ("Failed to parse colskip");
return FALSE;
}
static inline gboolean
decode_rowskip (GstBitReader * br, guint8 * data, guint width, guint height,
guint stride, guint invert)
{
guint x, y;
guint8 rowskip, v;
GST_DEBUG ("Parsing rowskip");
invert &= 1;
for (y = 0; y < height; y++) {
READ_UINT8 (br, rowskip, 1);
if (data) {
if (!rowskip)
memset (data, invert, width);
else {
for (x = 0; x < width; x++) {
READ_UINT8 (br, v, 1);
data[x] = v ^ invert;
}
}
data += stride;
} else if (rowskip)
SKIP (br, width);
}
return TRUE;
failed:
GST_WARNING ("Failed to parse rowskip");
return FALSE;
}
static inline gint8
decode012 (GstBitReader * br)
{
guint8 n;
READ_UINT8 (br, n, 1);
if (n == 0)
return 0;
READ_UINT8 (br, n, 1);
return n + 1;
failed:
GST_WARNING ("Could not decode 0 1 2 returning -1");
return -1;
}
static inline guint
calculate_nb_pan_scan_win (GstVC1AdvancedSeqHdr * advseqhdr,
GstVC1PicAdvanced * pic)
{
if (advseqhdr->interlace && !advseqhdr->psf) {
if (advseqhdr->pulldown)
return pic->rff + 2;
return 2;
} else {
if (advseqhdr->pulldown)
return pic->rptfrm + 1;
return 1;
}
}
static gboolean
decode_refdist (GstBitReader * br, guint16 * value)
{
guint16 tmp;
gint i = 2;
if (!gst_bit_reader_peek_bits_uint16 (br, &tmp, i))
goto failed;
if (tmp < 0x03) {
READ_UINT16 (br, *value, i);
return TRUE;
}
do {
i++;
if (!gst_bit_reader_peek_bits_uint16 (br, &tmp, i))
goto failed;
if (!(tmp >> i)) {
READ_UINT16 (br, *value, i);
return TRUE;
}
} while (i < 16);
failed:
{
GST_WARNING ("Could not decode end 0 returning");
return FALSE;
}
}
/*** bitplanes decoding ***/
static gboolean
bitplane_decoding (GstBitReader * br, guint8 * data,
GstVC1SeqHdr * seqhdr, guint8 * is_raw)
{
const guint width = seqhdr->mb_width;
const guint height = seqhdr->mb_height;
const guint stride = seqhdr->mb_stride;
guint imode, invert, invert_mask;
guint x, y, v;
guint8 *pdata = data;
*is_raw = FALSE;
GET_BITS (br, 1, &invert);
invert_mask = -invert;
if (!decode_vlc (br, &imode, vc1_imode_vlc_table,
G_N_ELEMENTS (vc1_imode_vlc_table)))
goto failed;
switch (imode) {
case IMODE_RAW:
GST_DEBUG ("Parsing IMODE_RAW");
*is_raw = TRUE;
return TRUE;
case IMODE_DIFF2:
invert_mask = 0;
/* fall-through */
case IMODE_NORM2:
invert_mask &= 3;
GST_DEBUG ("Parsing IMODE_DIFF2 or IMODE_NORM2 biplane");
x = 0;
if ((height * width) & 1) {
GET_BITS (br, 1, &v);
if (pdata) {
*pdata++ = (v ^ invert_mask) & 1;
if (++x == width) {
x = 0;
pdata += stride - width;
}
}
}
for (y = 0; y < height * width; y += 2) {
if (!decode_vlc (br, &v, vc1_norm2_vlc_table,
G_N_ELEMENTS (vc1_norm2_vlc_table)))
goto failed;
if (pdata) {
v ^= invert_mask;
*pdata++ = v >> 1;
if (++x == width) {
x = 0;
pdata += stride - width;
}
*pdata++ = v & 1;
if (++x == width) {
x = 0;
pdata += stride - width;
}
}
}
break;
case IMODE_DIFF6:
invert_mask = 0;
/* fall-through */
case IMODE_NORM6:
GST_DEBUG ("Parsing IMODE_DIFF6 or IMODE_NORM6 biplane");
if (!(height % 3) && (width % 3)) { /* decode 2x3 "vertical" tiles */
for (y = 0; y < height; y += 3) {
for (x = width & 1; x < width; x += 2) {
if (!decode_vlc (br, &v, vc1_norm6_vlc_table,
G_N_ELEMENTS (vc1_norm6_vlc_table)))
goto failed;
if (pdata) {
v ^= invert_mask;
pdata[x + 0] = v & 1;
pdata[x + 1] = (v >> 1) & 1;
pdata[x + 0 + stride] = (v >> 2) & 1;
pdata[x + 1 + stride] = (v >> 3) & 1;
pdata[x + 0 + stride * 2] = (v >> 4) & 1;
pdata[x + 1 + stride * 2] = (v >> 5) & 1;
}
}
if (pdata)
pdata += 3 * stride;
}
x = width & 1;
y = 0;
} else { /* decode 3x2 "horizontal" tiles */
if (pdata)
pdata += (height & 1) * width;
for (y = height & 1; y < height; y += 2) {
for (x = width % 3; x < width; x += 3) {
if (!decode_vlc (br, &v, vc1_norm6_vlc_table,
G_N_ELEMENTS (vc1_norm6_vlc_table)))
goto failed;
if (pdata) {
v ^= invert_mask;
pdata[x + 0] = v & 1;
pdata[x + 1] = (v >> 1) & 1;
pdata[x + 2] = (v >> 2) & 1;
pdata[x + 0 + stride] = (v >> 3) & 1;
pdata[x + 1 + stride] = (v >> 4) & 1;
pdata[x + 2 + stride] = (v >> 5) & 1;
}
}
if (pdata)
pdata += 2 * stride;
}
x = width % 3;
y = height & 1;
}
if (x) {
if (data)
pdata = data + y * stride;
if (!decode_colskip (br, pdata, x, height, stride, invert_mask))
goto failed;
}
if (y) {
if (data)
pdata = data + x;
if (!decode_rowskip (br, pdata, width, y, stride, invert_mask))
goto failed;
}
break;
case IMODE_ROWSKIP:
GST_DEBUG ("Parsing IMODE_ROWSKIP biplane");
if (!decode_rowskip (br, data, width, height, stride, invert_mask))
goto failed;
break;
case IMODE_COLSKIP:
GST_DEBUG ("Parsing IMODE_COLSKIP biplane");
if (!decode_colskip (br, data, width, height, stride, invert_mask))
goto failed;
break;
}
if (!data)
return TRUE;
/* Applying diff operator */
if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6) {
pdata = data;
pdata[0] ^= invert;
for (x = 1; x < width; x++)
pdata[x] ^= pdata[x - 1];
for (y = 1; y < height; y++) {
pdata[stride] ^= pdata[0];
for (x = 1; x < width; x++) {
if (pdata[stride + x - 1] != pdata[x])
pdata[stride + x] ^= invert;
else
pdata[stride + x] ^= pdata[stride + x - 1];
}
pdata += stride;
}
}
return TRUE;
failed:
GST_WARNING ("Failed to decode bitplane");
return FALSE;
}
static gboolean
parse_vopdquant (GstBitReader * br, GstVC1FrameHdr * framehdr, guint8 dquant)
{
GstVC1VopDquant *vopdquant = &framehdr->vopdquant;
GST_DEBUG ("Parsing vopdquant");
vopdquant->dqbilevel = 0;
if (dquant == 2) {
READ_UINT8 (br, vopdquant->dquantfrm, 1);
READ_UINT8 (br, vopdquant->pqdiff, 3);
if (vopdquant->pqdiff != 7)
vopdquant->altpquant = framehdr->pquant + vopdquant->pqdiff + 1;
else {
READ_UINT8 (br, vopdquant->abspq, 5);
vopdquant->altpquant = vopdquant->abspq;
}
} else {
READ_UINT8 (br, vopdquant->dquantfrm, 1);
GST_DEBUG (" %u DquantFrm %u", gst_bit_reader_get_pos (br),
vopdquant->dquantfrm);
if (vopdquant->dquantfrm) {
READ_UINT8 (br, vopdquant->dqprofile, 1);
switch (vopdquant->dqprofile) {
case GST_VC1_DQPROFILE_SINGLE_EDGE:
case GST_VC1_DQPROFILE_DOUBLE_EDGES:
READ_UINT8 (br, vopdquant->dqsbedge, 2);
break;
case GST_VC1_DQPROFILE_ALL_MBS:
READ_UINT8 (br, vopdquant->dqbilevel, 1);
break;
}
if (vopdquant->dqbilevel
|| vopdquant->dqprofile != GST_VC1_DQPROFILE_ALL_MBS) {
{
READ_UINT8 (br, vopdquant->pqdiff, 3);
if (vopdquant->pqdiff == 7)
READ_UINT8 (br, vopdquant->abspq, 5);
}
}
}
}
return TRUE;
failed:
GST_WARNING ("Failed to parse vopdquant");
return FALSE;
}
static inline gint
scan_for_start_codes (const guint8 * data, guint size)
{
GstByteReader br;
gst_byte_reader_init (&br, data, size);
/* NALU not empty, so we can at least expect 1 (even 2) bytes following sc */
return gst_byte_reader_masked_scan_uint32 (&br, 0xffffff00, 0x00000100,
0, size);
}
static inline gint
get_unary (GstBitReader * br, gint stop, gint len)
{
int i;
guint8 current = 0xff;
for (i = 0; i < len; i++) {
current = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
if (current == stop)
return i;
}
return i;
}
static inline void
calculate_framerate_bitrate (guint8 frmrtq_postproc, guint8 bitrtq_postproc,
guint * framerate, guint * bitrate)
{
if (frmrtq_postproc == 0 && bitrtq_postproc == 31) {
*framerate = 0;
*bitrate = 0;
} else if (frmrtq_postproc == 0 && bitrtq_postproc == 30) {
*framerate = 2;
*bitrate = 1952;
} else if (frmrtq_postproc == 1 && bitrtq_postproc == 31) {
*framerate = 6;
*bitrate = 2016;
} else {
if (frmrtq_postproc == 7) {
*framerate = 30;
} else {
*framerate = 2 + (frmrtq_postproc * 4);
}
if (bitrtq_postproc == 31) {
*bitrate = 2016;
} else {
*bitrate = 32 + (bitrtq_postproc * 64);
}
}
}
static inline void
calculate_mb_size (GstVC1SeqHdr * seqhdr, guint width, guint height)
{
seqhdr->mb_width = (width + 15) >> 4;
seqhdr->mb_height = (height + 15) >> 4;
seqhdr->mb_stride = seqhdr->mb_width + 1;
}
static GstVC1ParserResult
parse_hrd_param_flag (GstBitReader * br, GstVC1HrdParam * hrd_param)
{
guint i;
GST_DEBUG ("Parsing Hrd param flag");
if (gst_bit_reader_get_remaining (br) < 13)
goto failed;
hrd_param->hrd_num_leaky_buckets =
gst_bit_reader_get_bits_uint8_unchecked (br, 5);
hrd_param->bit_rate_exponent =
gst_bit_reader_get_bits_uint8_unchecked (br, 4);
hrd_param->buffer_size_exponent =
gst_bit_reader_get_bits_uint8_unchecked (br, 4);
if (gst_bit_reader_get_remaining (br) <
(32 * hrd_param->hrd_num_leaky_buckets))
goto failed;
for (i = 0; i < hrd_param->hrd_num_leaky_buckets; i++) {
hrd_param->hrd_rate[i] = gst_bit_reader_get_bits_uint16_unchecked (br, 16);
hrd_param->hrd_buffer[i] =
gst_bit_reader_get_bits_uint16_unchecked (br, 16);
}
return GST_VC1_PARSER_OK;
failed:
GST_WARNING ("Failed to parse hrd param flag");
return GST_VC1_PARSER_ERROR;
}
static GstVC1ParserResult
parse_sequence_header_advanced (GstVC1SeqHdr * seqhdr, GstBitReader * br)
{
GstVC1AdvancedSeqHdr *advanced = &seqhdr->advanced;
guint8 tmp;
GST_DEBUG ("Parsing sequence header in advanced mode");
READ_UINT8 (br, tmp, 3);
advanced->level = tmp;
advanced->par_n = 0;
advanced->par_d = 0;
advanced->fps_n = 0;
advanced->fps_d = 0;
READ_UINT8 (br, advanced->colordiff_format, 2);
READ_UINT8 (br, advanced->frmrtq_postproc, 3);
READ_UINT8 (br, advanced->bitrtq_postproc, 5);
calculate_framerate_bitrate (advanced->frmrtq_postproc,
advanced->bitrtq_postproc, &advanced->framerate, &advanced->bitrate);
GST_DEBUG ("level %u, colordiff_format %u , frmrtq_postproc %u,"
" bitrtq_postproc %u", advanced->level, advanced->colordiff_format,
advanced->frmrtq_postproc, advanced->bitrtq_postproc);
if (gst_bit_reader_get_remaining (br) < 32)
goto failed;
advanced->postprocflag = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
advanced->max_coded_width = gst_bit_reader_get_bits_uint16_unchecked (br, 12);
advanced->max_coded_height =
gst_bit_reader_get_bits_uint16_unchecked (br, 12);
advanced->max_coded_width = (advanced->max_coded_width + 1) << 1;
advanced->max_coded_height = (advanced->max_coded_height + 1) << 1;
calculate_mb_size (seqhdr, advanced->max_coded_width,
advanced->max_coded_height);
advanced->pulldown = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
advanced->interlace = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
advanced->tfcntrflag = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
advanced->finterpflag = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
GST_DEBUG ("postprocflag %u, max_coded_width %u, max_coded_height %u,"
"pulldown %u, interlace %u, tfcntrflag %u, finterpflag %u",
advanced->postprocflag, advanced->max_coded_width,
advanced->max_coded_height, advanced->pulldown,
advanced->interlace, advanced->tfcntrflag, advanced->finterpflag);
/* Skipping reserved bit */
gst_bit_reader_skip_unchecked (br, 1);
advanced->psf = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
advanced->display_ext = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
if (advanced->display_ext) {
READ_UINT16 (br, advanced->disp_horiz_size, 14);
READ_UINT16 (br, advanced->disp_vert_size, 14);
advanced->disp_horiz_size++;
advanced->disp_vert_size++;
READ_UINT8 (br, advanced->aspect_ratio_flag, 1);
if (advanced->aspect_ratio_flag) {
READ_UINT8 (br, advanced->aspect_ratio, 4);
if (advanced->aspect_ratio == 15) {
/* Aspect Width (6.1.14.3.2) and Aspect Height (6.1.14.3.3)
* syntax elements hold a binary encoding of sizes ranging
* from 1 to 256 */
READ_UINT8 (br, advanced->aspect_horiz_size, 8);
READ_UINT8 (br, advanced->aspect_vert_size, 8);
advanced->par_n = 1 + advanced->aspect_horiz_size;
advanced->par_d = 1 + advanced->aspect_vert_size;
} else {
advanced->par_n = aspect_ratios[advanced->aspect_ratio].par_n;
advanced->par_d = aspect_ratios[advanced->aspect_ratio].par_d;
}
}
READ_UINT8 (br, advanced->framerate_flag, 1);
if (advanced->framerate_flag) {
READ_UINT8 (br, advanced->framerateind, 1);
if (!advanced->framerateind) {
READ_UINT8 (br, advanced->frameratenr, 8);
READ_UINT8 (br, advanced->frameratedr, 4);
} else {
READ_UINT16 (br, advanced->framerateexp, 16);
}
if (advanced->frameratenr > 0 &&
advanced->frameratenr < 8 &&
advanced->frameratedr > 0 && advanced->frameratedr < 3) {
advanced->fps_n = framerates_n[advanced->frameratenr];
advanced->fps_d = framerates_d[advanced->frameratedr];
} else {
advanced->fps_n = advanced->framerateexp + 1;
advanced->fps_d = 32;
}
}
READ_UINT8 (br, advanced->color_format_flag, 1);
if (advanced->color_format_flag) {
if (gst_bit_reader_get_remaining (br) < 24)
goto failed;
advanced->color_prim = gst_bit_reader_get_bits_uint8_unchecked (br, 8);
advanced->transfer_char = gst_bit_reader_get_bits_uint8_unchecked (br, 8);
advanced->matrix_coef = gst_bit_reader_get_bits_uint8_unchecked (br, 8);
}
}
READ_UINT8 (br, advanced->hrd_param_flag, 1);
if (advanced->hrd_param_flag)
return parse_hrd_param_flag (br, &advanced->hrd_param);
return GST_VC1_PARSER_OK;
failed:
GST_WARNING ("Failed to parse advanced headers");
return GST_VC1_PARSER_ERROR;
}
static GstVC1ParserResult
parse_frame_header_advanced (GstBitReader * br, GstVC1FrameHdr * framehdr,
GstVC1SeqHdr * seqhdr, GstVC1BitPlanes * bitplanes, gboolean field2)
{
GstVC1AdvancedSeqHdr *advhdr = &seqhdr->advanced;
GstVC1PicAdvanced *pic = &framehdr->pic.advanced;
GstVC1EntryPointHdr *entrypthdr = &advhdr->entrypoint;
guint8 mvmodeidx;
GST_DEBUG ("Parsing Frame header advanced %u", advhdr->interlace);
/* Set the conveninence fields */
framehdr->profile = seqhdr->profile;
framehdr->dquant = entrypthdr->dquant;
if (advhdr->interlace) {
gint8 fcm = decode012 (br);
if (fcm < 0)
goto failed;
pic->fcm = (guint8) fcm;
} else
pic->fcm = GST_VC1_FRAME_PROGRESSIVE;
if (pic->fcm == GST_VC1_FIELD_INTERLACE) {
READ_UINT8 (br, pic->fptype, 3);
if (field2) {
switch (pic->fptype) {
case 0x00:
case 0x02:
framehdr->ptype = GST_VC1_PICTURE_TYPE_I;
case 0x01:
case 0x03:
framehdr->ptype = GST_VC1_PICTURE_TYPE_P;
case 0x04:
case 0x06:
framehdr->ptype = GST_VC1_PICTURE_TYPE_B;
case 0x05:
case 0x07:
framehdr->ptype = GST_VC1_PICTURE_TYPE_BI;
}
} else {
switch (pic->fptype) {
case 0x00:
case 0x01:
framehdr->ptype = GST_VC1_PICTURE_TYPE_I;
case 0x02:
case 0x03:
framehdr->ptype = GST_VC1_PICTURE_TYPE_P;
case 0x04:
case 0x05:
framehdr->ptype = GST_VC1_PICTURE_TYPE_B;
case 0x06:
case 0x07:
framehdr->ptype = GST_VC1_PICTURE_TYPE_BI;
}
}
} else
framehdr->ptype = (guint8) get_unary (br, 0, 4);
if (advhdr->tfcntrflag) {
READ_UINT8 (br, pic->tfcntr, 8);
GST_DEBUG ("tfcntr %u", pic->tfcntr);
}
if (advhdr->pulldown) {
if (!advhdr->interlace || advhdr->psf) {
READ_UINT8 (br, pic->rptfrm, 2);
GST_DEBUG ("rptfrm %u", pic->rptfrm);
} else {
READ_UINT8 (br, pic->tff, 1);
READ_UINT8 (br, pic->rff, 1);
GST_DEBUG ("tff %u, rff %u", pic->tff, pic->rff);
}
}
if (entrypthdr->panscan_flag) {
READ_UINT8 (br, pic->ps_present, 1);
if (pic->ps_present) {
guint i, nb_pan_scan_win = calculate_nb_pan_scan_win (advhdr, pic);
if (gst_bit_reader_get_remaining (br) < 64 * nb_pan_scan_win)
goto failed;
for (i = 0; i < nb_pan_scan_win; i++) {
pic->ps_hoffset = gst_bit_reader_get_bits_uint32_unchecked (br, 18);
pic->ps_voffset = gst_bit_reader_get_bits_uint32_unchecked (br, 18);
pic->ps_width = gst_bit_reader_get_bits_uint16_unchecked (br, 14);
pic->ps_height = gst_bit_reader_get_bits_uint16_unchecked (br, 14);
}
}
}
if (framehdr->ptype == GST_VC1_PICTURE_TYPE_SKIPPED)
return GST_VC1_PARSER_OK;
READ_UINT8 (br, pic->rndctrl, 1);
if (advhdr->interlace) {
READ_UINT8 (br, pic->uvsamp, 1);
GST_DEBUG ("uvsamp %u", pic->uvsamp);
if (pic->fcm == GST_VC1_FIELD_INTERLACE && entrypthdr->refdist_flag &&
pic->fptype < 4)
decode_refdist (br, &pic->refdist);
else
pic->refdist = 0;
}
if (advhdr->finterpflag) {
READ_UINT8 (br, framehdr->interpfrm, 1);
GST_DEBUG ("interpfrm %u", framehdr->interpfrm);
}
if ((pic->fcm != GST_VC1_FIELD_INTERLACE &&
framehdr->ptype == GST_VC1_PICTURE_TYPE_B) ||
(pic->fcm == GST_VC1_FIELD_INTERLACE && (pic->fptype > 4))) {
guint bfraction;
if (!decode_vlc (br, &bfraction, vc1_bfraction_vlc_table,
G_N_ELEMENTS (vc1_bfraction_vlc_table)))
goto failed;
pic->bfraction = bfraction;
GST_DEBUG ("bfraction %u", pic->bfraction);
if (pic->bfraction == GST_VC1_BFRACTION_PTYPE_BI) {
framehdr->ptype = GST_VC1_PICTURE_TYPE_BI;
}
}
READ_UINT8 (br, framehdr->pqindex, 5);
if (!framehdr->pqindex)
goto failed;
/* compute pquant */
if (entrypthdr->quantizer == GST_VC1_QUANTIZER_IMPLICITLY)
framehdr->pquant = vc1_pquant_table[0][framehdr->pqindex];
else
framehdr->pquant = vc1_pquant_table[1][framehdr->pqindex];
framehdr->pquantizer = 1;
if (entrypthdr->quantizer == GST_VC1_QUANTIZER_IMPLICITLY)
framehdr->pquantizer = framehdr->pqindex < 9;
if (entrypthdr->quantizer == GST_VC1_QUANTIZER_NON_UNIFORM)
framehdr->pquantizer = 0;
if (framehdr->pqindex <= 8)
READ_UINT8 (br, framehdr->halfqp, 1);
else
framehdr->halfqp = 0;
if (entrypthdr->quantizer == GST_VC1_QUANTIZER_EXPLICITLY) {
READ_UINT8 (br, framehdr->pquantizer, 1);
}
if (advhdr->postprocflag)
READ_UINT8 (br, pic->postproc, 2);
GST_DEBUG ("Parsing %u picture, pqindex %u, pquant %u pquantizer %u"
"halfqp %u", framehdr->ptype, framehdr->pqindex, framehdr->pquant,
framehdr->pquantizer, framehdr->halfqp);
switch (framehdr->ptype) {
case GST_VC1_PICTURE_TYPE_I:
case GST_VC1_PICTURE_TYPE_BI:
if (pic->fcm == GST_VC1_FRAME_INTERLACE) {
if (!bitplane_decoding (br, bitplanes ? bitplanes->fieldtx : NULL,
seqhdr, &pic->fieldtx))
goto failed;
}
if (!bitplane_decoding (br, bitplanes ? bitplanes->acpred : NULL,
seqhdr, &pic->acpred))
goto failed;
if (entrypthdr->overlap && framehdr->pquant <= 8) {
pic->condover = decode012 (br);
if (pic->condover == (guint8) - 1)
goto failed;
else if (pic->condover == GST_VC1_CONDOVER_SELECT) {
if (!bitplane_decoding (br, bitplanes ? bitplanes->overflags : NULL,
seqhdr, &pic->overflags))
goto failed;
GST_DEBUG ("overflags %u", pic->overflags);
}
}
framehdr->transacfrm = get_unary (br, 0, 2);
pic->transacfrm2 = get_unary (br, 0, 2);
READ_UINT8 (br, framehdr->transdctab, 1);
if (framehdr->dquant)
parse_vopdquant (br, framehdr, framehdr->dquant);
GST_DEBUG
("acpred %u, condover %u, transacfrm %u, transacfrm2 %u, transdctab %u",
pic->acpred, pic->condover, framehdr->transacfrm, pic->transacfrm2,
framehdr->transdctab);
break;
case GST_VC1_PICTURE_TYPE_B:
if (entrypthdr->extended_mv)
pic->mvrange = get_unary (br, 0, 3);
else
pic->mvrange = 0;
if (pic->fcm != GST_VC1_FRAME_PROGRESSIVE) {
if (entrypthdr->extended_dmv)
pic->dmvrange = get_unary (br, 0, 3);
}
if (pic->fcm == GST_VC1_FRAME_INTERLACE)
READ_UINT8 (br, pic->intcomp, 1);
else
READ_UINT8 (br, pic->mvmode, 1);
if (pic->fcm == GST_VC1_FIELD_INTERLACE) {
if (!bitplane_decoding (br, bitplanes ? bitplanes->forwardmb : NULL,
seqhdr, &pic->forwardmb))
goto failed;
} else {
if (!bitplane_decoding (br, bitplanes ? bitplanes->directmb : NULL,
seqhdr, &pic->directmb))
goto failed;
if (!bitplane_decoding (br, bitplanes ? bitplanes->skipmb : NULL,
seqhdr, &pic->skipmb))
goto failed;
}
if (pic->fcm != GST_VC1_FRAME_PROGRESSIVE) {
if (gst_bit_reader_get_remaining (br) < 7)
goto failed;
pic->mbmodetab = gst_bit_reader_get_bits_uint8_unchecked (br, 2);
pic->imvtab = gst_bit_reader_get_bits_uint8_unchecked (br, 2);
pic->icbptab = gst_bit_reader_get_bits_uint8_unchecked (br, 3);
if (pic->fcm == GST_VC1_FRAME_INTERLACE)
READ_UINT8 (br, pic->mvbptab2, 2);
if (pic->fcm == GST_VC1_FRAME_INTERLACE ||
(pic->fcm == GST_VC1_FIELD_INTERLACE
&& pic->mvmode == GST_VC1_MVMODE_MIXED_MV))
READ_UINT8 (br, pic->mvbptab4, 2);
} else {
READ_UINT8 (br, pic->mvtab, 2);
READ_UINT8 (br, pic->cbptab, 2);
}
if (framehdr->dquant) {
parse_vopdquant (br, framehdr, framehdr->dquant);
}
if (entrypthdr->vstransform) {
READ_UINT8 (br, pic->ttmbf, 1);
if (pic->ttmbf) {
READ_UINT8 (br, pic->ttfrm, 2);
}
}
framehdr->transacfrm = get_unary (br, 0, 2);
READ_UINT8 (br, framehdr->transdctab, 1);
GST_DEBUG ("transacfrm %u transdctab %u mvmode %u mvtab %u,"
"cbptab %u directmb %u skipmb %u", framehdr->transacfrm,
framehdr->transdctab, pic->mvmode, pic->mvtab, pic->cbptab,
pic->directmb, pic->skipmb);
break;
case GST_VC1_PICTURE_TYPE_P:
if (pic->fcm == GST_VC1_FIELD_INTERLACE) {
READ_UINT8 (br, pic->numref, 1);
if (pic->numref)
READ_UINT8 (br, pic->reffield, 1);
}
if (entrypthdr->extended_mv)
pic->mvrange = get_unary (br, 0, 3);
else
pic->mvrange = 0;
if (pic->fcm != GST_VC1_FRAME_PROGRESSIVE) {
if (entrypthdr->extended_dmv)
pic->dmvrange = get_unary (br, 0, 3);
}
if (pic->fcm == GST_VC1_FRAME_INTERLACE) {
READ_UINT8 (br, pic->mvswitch4, 1);
READ_UINT8 (br, pic->intcomp, 1);
if (pic->intcomp) {
READ_UINT8 (br, pic->lumscale, 6);
READ_UINT8 (br, pic->lumshift, 6);
}
} else {
mvmodeidx = framehdr->pquant > 12;
pic->mvmode = vc1_mvmode_table[mvmodeidx][get_unary (br, 1, 4)];
if (pic->mvmode == GST_VC1_MVMODE_INTENSITY_COMP) {
pic->mvmode2 = vc1_mvmode2_table[mvmodeidx][get_unary (br, 1, 3)];
if (pic->fcm == GST_VC1_FIELD_INTERLACE)
pic->intcompfield = decode012 (br);
READ_UINT8 (br, pic->lumscale, 6);
READ_UINT8 (br, pic->lumshift, 6);
GST_DEBUG ("lumscale %u lumshift %u", pic->lumscale, pic->lumshift);
if (pic->fcm == GST_VC1_FIELD_INTERLACE && pic->intcompfield) {
READ_UINT8 (br, pic->lumscale2, 6);
READ_UINT8 (br, pic->lumshift2, 6);
}
}
if (pic->fcm == GST_VC1_FRAME_PROGRESSIVE) {
if (pic->mvmode == GST_VC1_MVMODE_MIXED_MV ||
(pic->mvmode == GST_VC1_MVMODE_INTENSITY_COMP &&
pic->mvmode2 == GST_VC1_MVMODE_MIXED_MV)) {
if (!bitplane_decoding (br, bitplanes ? bitplanes->mvtypemb : NULL,
seqhdr, &pic->mvtypemb))
goto failed;
GST_DEBUG ("mvtypemb %u", pic->mvtypemb);
}
}
}
if (pic->fcm != GST_VC1_FIELD_INTERLACE) {
if (!bitplane_decoding (br, bitplanes ? bitplanes->skipmb : NULL,
seqhdr, &pic->skipmb))
goto failed;
}
if (pic->fcm != GST_VC1_FRAME_PROGRESSIVE) {
if (gst_bit_reader_get_remaining (br) < 7)
goto failed;
pic->mbmodetab = gst_bit_reader_get_bits_uint8_unchecked (br, 2);
pic->imvtab = gst_bit_reader_get_bits_uint8_unchecked (br, 2);
pic->icbptab = gst_bit_reader_get_bits_uint8_unchecked (br, 3);
if (pic->fcm != GST_VC1_FIELD_INTERLACE) {
READ_UINT8 (br, pic->mvbptab2, 2);
if (pic->mvswitch4)
READ_UINT8 (br, pic->mvbptab4, 2);
} else if (pic->mvmode == GST_VC1_MVMODE_MIXED_MV)
READ_UINT8 (br, pic->mvbptab4, 2);
} else {
if (gst_bit_reader_get_remaining (br) < 4)
goto failed;
pic->mvtab = gst_bit_reader_get_bits_uint8_unchecked (br, 2);
pic->cbptab = gst_bit_reader_get_bits_uint8_unchecked (br, 2);
}
if (framehdr->dquant) {
parse_vopdquant (br, framehdr, framehdr->dquant);
}
if (entrypthdr->vstransform) {
READ_UINT8 (br, pic->ttmbf, 1);
if (pic->ttmbf) {
READ_UINT8 (br, pic->ttfrm, 2);
}
}
framehdr->transacfrm = get_unary (br, 0, 2);
READ_UINT8 (br, framehdr->transdctab, 1);
GST_DEBUG ("transacfrm %u transdctab %u mvmode %u mvtab %u,"
"cbptab %u skipmb %u", framehdr->transacfrm, framehdr->transdctab,
pic->mvmode, pic->mvtab, pic->cbptab, pic->skipmb);
break;
default:
goto failed;
break;
}
return GST_VC1_PARSER_OK;
failed:
GST_WARNING ("Failed to parse frame header");
return GST_VC1_PARSER_ERROR;
}
static GstVC1ParserResult
parse_frame_header (GstBitReader * br, GstVC1FrameHdr * framehdr,
GstVC1SeqHdr * seqhdr, GstVC1BitPlanes * bitplanes)
{
guint8 mvmodeidx, tmp;
GstVC1PicSimpleMain *pic = &framehdr->pic.simple;
GstVC1SeqStructC *structc = &seqhdr->struct_c;
GST_DEBUG ("Parsing frame header in simple or main mode");
/* Set the conveninence fields */
framehdr->profile = seqhdr->profile;
framehdr->dquant = structc->dquant;
framehdr->interpfrm = 0;
if (structc->finterpflag)
READ_UINT8 (br, framehdr->interpfrm, 1);
READ_UINT8 (br, pic->frmcnt, 2);
pic->rangeredfrm = 0;
if (structc->rangered) {
READ_UINT8 (br, pic->rangeredfrm, 1);
}
/* Figuring out the picture type */
READ_UINT8 (br, tmp, 1);
framehdr->ptype = tmp;
if (structc->maxbframes) {
if (!framehdr->ptype) {
READ_UINT8 (br, tmp, 1);
if (tmp)
framehdr->ptype = GST_VC1_PICTURE_TYPE_I;
else
framehdr->ptype = GST_VC1_PICTURE_TYPE_B;
} else
framehdr->ptype = GST_VC1_PICTURE_TYPE_P;
} else {
if (framehdr->ptype)
framehdr->ptype = GST_VC1_PICTURE_TYPE_P;
else
framehdr->ptype = GST_VC1_PICTURE_TYPE_I;
}
if (framehdr->ptype == GST_VC1_PICTURE_TYPE_B) {
guint bfraction;
if (!decode_vlc (br, &bfraction, vc1_bfraction_vlc_table,
G_N_ELEMENTS (vc1_bfraction_vlc_table)))
goto failed;
pic->bfraction = bfraction;
GST_DEBUG ("bfraction %d", pic->bfraction);
if (pic->bfraction == GST_VC1_BFRACTION_PTYPE_BI) {
framehdr->ptype = GST_VC1_PICTURE_TYPE_BI;
}
}
if (framehdr->ptype == GST_VC1_PICTURE_TYPE_I ||
framehdr->ptype == GST_VC1_PICTURE_TYPE_BI)
READ_UINT8 (br, pic->bf, 7);
READ_UINT8 (br, framehdr->pqindex, 5);
if (!framehdr->pqindex)
return GST_VC1_PARSER_ERROR;
GST_DEBUG ("pqindex %u", framehdr->pqindex);
/* compute pquant */
if (structc->quantizer == GST_VC1_QUANTIZER_IMPLICITLY)
framehdr->pquant = vc1_pquant_table[0][framehdr->pqindex];
else
framehdr->pquant = vc1_pquant_table[1][framehdr->pqindex];
GST_DEBUG ("pquant %u", framehdr->pquant);
if (framehdr->pqindex <= 8)
READ_UINT8 (br, framehdr->halfqp, 1);
else
framehdr->halfqp = 0;
/* Set pquantizer */
framehdr->pquantizer = 1;
if (structc->quantizer == GST_VC1_QUANTIZER_IMPLICITLY)
framehdr->pquantizer = framehdr->pqindex < 9;
else if (structc->quantizer == GST_VC1_QUANTIZER_NON_UNIFORM)
framehdr->pquantizer = 0;
if (structc->quantizer == GST_VC1_QUANTIZER_EXPLICITLY)
READ_UINT8 (br, framehdr->pquantizer, 1);
if (structc->extended_mv == 1) {
pic->mvrange = get_unary (br, 0, 3);
GST_DEBUG ("mvrange %u", pic->mvrange);
}
if (structc->multires && (framehdr->ptype == GST_VC1_PICTURE_TYPE_P ||
framehdr->ptype == GST_VC1_PICTURE_TYPE_I)) {
READ_UINT8 (br, pic->respic, 2);
GST_DEBUG ("Respic %u", pic->respic);
}
GST_DEBUG ("Parsing %u Frame, pquantizer %u, halfqp %u, rangeredfrm %u, "
"interpfrm %u", framehdr->ptype, framehdr->pquantizer, framehdr->halfqp,
pic->rangeredfrm, framehdr->interpfrm);
switch (framehdr->ptype) {
case GST_VC1_PICTURE_TYPE_I:
case GST_VC1_PICTURE_TYPE_BI:
framehdr->transacfrm = get_unary (br, 0, 2);
pic->transacfrm2 = get_unary (br, 0, 2);
READ_UINT8 (br, framehdr->transdctab, 1);
GST_DEBUG ("transacfrm %u, transacfrm2 %u, transdctab %u",
framehdr->transacfrm, pic->transacfrm2, framehdr->transdctab);
break;
case GST_VC1_PICTURE_TYPE_P:
mvmodeidx = framehdr->pquant > 12;
pic->mvmode = vc1_mvmode_table[mvmodeidx][get_unary (br, 1, 4)];
if (pic->mvmode == GST_VC1_MVMODE_INTENSITY_COMP) {
pic->mvmode2 = vc1_mvmode2_table[mvmodeidx][get_unary (br, 1, 3)];
READ_UINT8 (br, pic->lumscale, 6);
READ_UINT8 (br, pic->lumshift, 6);
GST_DEBUG ("lumscale %u lumshift %u", pic->lumscale, pic->lumshift);
}
if (pic->mvmode == GST_VC1_MVMODE_MIXED_MV ||
(pic->mvmode == GST_VC1_MVMODE_INTENSITY_COMP &&
pic->mvmode2 == GST_VC1_MVMODE_MIXED_MV)) {
if (!bitplane_decoding (br, bitplanes ? bitplanes->mvtypemb : NULL,
seqhdr, &pic->mvtypemb))
goto failed;
GST_DEBUG ("mvtypemb %u", pic->mvtypemb);
}
if (!bitplane_decoding (br, bitplanes ? bitplanes->skipmb : NULL,
seqhdr, &pic->skipmb))
goto failed;
READ_UINT8 (br, pic->mvtab, 2);
READ_UINT8 (br, pic->cbptab, 2);
if (framehdr->dquant) {
parse_vopdquant (br, framehdr, framehdr->dquant);
}
if (structc->vstransform) {
READ_UINT8 (br, pic->ttmbf, 1);
GST_DEBUG ("ttmbf %u", pic->ttmbf);
if (pic->ttmbf) {
READ_UINT8 (br, pic->ttfrm, 2);
GST_DEBUG ("ttfrm %u", pic->ttfrm);
}
}
framehdr->transacfrm = get_unary (br, 0, 2);
READ_UINT8 (br, framehdr->transdctab, 1);
GST_DEBUG ("transacfrm %u transdctab %u mvmode %u mvtab %u,"
"cbptab %u skipmb %u", framehdr->transacfrm, framehdr->transdctab,
pic->mvmode, pic->mvtab, pic->cbptab, pic->skipmb);
break;
case GST_VC1_PICTURE_TYPE_B:
READ_UINT8 (br, pic->mvmode, 1);
if (!bitplane_decoding (br, bitplanes ? bitplanes->directmb : NULL,
seqhdr, &pic->directmb))
goto failed;
if (!bitplane_decoding (br, bitplanes ? bitplanes->skipmb : NULL,
seqhdr, &pic->skipmb))
goto failed;
READ_UINT8 (br, pic->mvtab, 2);
READ_UINT8 (br, pic->cbptab, 2);
if (framehdr->dquant)
parse_vopdquant (br, framehdr, framehdr->dquant);
if (structc->vstransform) {
READ_UINT8 (br, pic->ttmbf, 1);
if (pic->ttmbf) {
READ_UINT8 (br, pic->ttfrm, 2);
}
}
framehdr->transacfrm = get_unary (br, 0, 2);
READ_UINT8 (br, framehdr->transdctab, 1);
GST_DEBUG ("transacfrm %u transdctab %u mvmode %u mvtab %u,"
"cbptab %u directmb %u skipmb %u", framehdr->transacfrm,
framehdr->transdctab, pic->mvmode, pic->mvtab, pic->cbptab,
pic->directmb, pic->skipmb);
break;
default:
goto failed;
break;
}
return GST_VC1_PARSER_OK;
failed:
GST_WARNING ("Failed to parse Simple picture header");
return GST_VC1_PARSER_ERROR;
}
static GstVC1ParserResult
parse_sequence_header_struct_a (GstBitReader * br, GstVC1SeqStructA * structa)
{
if (gst_bit_reader_get_remaining (br) < 64) {
GST_WARNING ("Failed to parse struct A");
return GST_VC1_PARSER_ERROR;
}
structa->vert_size = gst_bit_reader_get_bits_uint32_unchecked (br, 32);
structa->horiz_size = gst_bit_reader_get_bits_uint32_unchecked (br, 32);
return GST_VC1_PARSER_OK;
}
static GstVC1ParserResult
parse_sequence_header_struct_b (GstBitReader * br, GstVC1SeqStructB * structb)
{
if (gst_bit_reader_get_remaining (br) < 96) {
GST_WARNING ("Failed to parse sequence header");
return GST_VC1_PARSER_ERROR;
}
structb->level = gst_bit_reader_get_bits_uint8_unchecked (br, 3);
structb->cbr = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
/* res4 */
gst_bit_reader_skip_unchecked (br, 4);
structb->hrd_buffer = gst_bit_reader_get_bits_uint32_unchecked (br, 24);
structb->hrd_rate = gst_bit_reader_get_bits_uint32_unchecked (br, 32);
structb->framerate = gst_bit_reader_get_bits_uint32_unchecked (br, 32);
return GST_VC1_PARSER_OK;
}
static GstVC1ParserResult
parse_sequence_header_struct_c (GstBitReader * br, GstVC1SeqStructC * structc)
{
guint8 old_interlaced_mode, tmp;
READ_UINT8 (br, tmp, 2);
structc->profile = tmp;
if (structc->profile == GST_VC1_PROFILE_ADVANCED)
return GST_VC1_PARSER_OK;
GST_DEBUG ("Parsing sequence header in simple or main mode");
if (gst_bit_reader_get_remaining (br) < 29)
goto failed;
/* Reserved bits */
old_interlaced_mode = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
if (old_interlaced_mode)
GST_WARNING ("Old interlaced mode used");
structc->wmvp = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
if (structc->wmvp)
GST_DEBUG ("WMVP mode");
structc->frmrtq_postproc = gst_bit_reader_get_bits_uint8_unchecked (br, 3);
structc->bitrtq_postproc = gst_bit_reader_get_bits_uint8_unchecked (br, 5);
structc->loop_filter = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
calculate_framerate_bitrate (structc->frmrtq_postproc,
structc->bitrtq_postproc, &structc->framerate, &structc->bitrate);
/* Skipping reserved3 bit */
gst_bit_reader_skip_unchecked (br, 1);
structc->multires = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
/* Skipping reserved4 bit */
gst_bit_reader_skip_unchecked (br, 1);
structc->fastuvmc = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
structc->extended_mv = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
structc->dquant = gst_bit_reader_get_bits_uint8_unchecked (br, 2);
structc->vstransform = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
/* Skipping reserved5 bit */
gst_bit_reader_skip_unchecked (br, 1);
structc->overlap = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
structc->syncmarker = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
structc->rangered = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
structc->maxbframes = gst_bit_reader_get_bits_uint8_unchecked (br, 3);
structc->quantizer = gst_bit_reader_get_bits_uint8_unchecked (br, 2);
structc->finterpflag = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
GST_DEBUG ("frmrtq_postproc %u, bitrtq_postproc %u, loop_filter %u, "
"multires %u, fastuvmc %u, extended_mv %u, dquant %u, vstransform %u, "
"overlap %u, syncmarker %u, rangered %u, maxbframes %u, quantizer %u, "
"finterpflag %u", structc->frmrtq_postproc, structc->bitrtq_postproc,
structc->loop_filter, structc->multires, structc->fastuvmc,
structc->extended_mv, structc->dquant, structc->vstransform,
structc->overlap, structc->syncmarker, structc->rangered,
structc->maxbframes, structc->quantizer, structc->finterpflag);
if (structc->wmvp) {
if (gst_bit_reader_get_remaining (br) < 29)
goto failed;
structc->coded_width = gst_bit_reader_get_bits_uint16_unchecked (br, 11);
structc->coded_height = gst_bit_reader_get_bits_uint16_unchecked (br, 11);
structc->framerate = gst_bit_reader_get_bits_uint8_unchecked (br, 5);
gst_bit_reader_skip_unchecked (br, 1);
structc->slice_code = gst_bit_reader_get_bits_uint8_unchecked (br, 1);
GST_DEBUG ("coded_width %u, coded_height %u, framerate %u slice_code %u",
structc->coded_width, structc->coded_height, structc->framerate,
structc->slice_code);
}
return GST_VC1_PARSER_OK;
failed:
GST_WARNING ("Failed to struct C");
return GST_VC1_PARSER_ERROR;
}
/**** API ****/
/**
* gst_vc1_identify_next_bdu:
* @data: The data to parse
* @size: the size of @data
* @bdu: (out): The #GstVC1BDU where to store parsed bdu headers
*
* Parses @data and fills @bdu fields
*
* Returns: a #GstVC1ParserResult
*/
GstVC1ParserResult
gst_vc1_identify_next_bdu (const guint8 * data, gsize size, GstVC1BDU * bdu)
{
gint off1, off2;
g_return_val_if_fail (bdu != NULL, GST_VC1_PARSER_ERROR);
if (size < 4) {
GST_DEBUG ("Can't parse, buffer has too small size %" G_GSSIZE_FORMAT,
size);
return GST_VC1_PARSER_ERROR;
}
off1 = scan_for_start_codes (data, size);
if (off1 < 0) {
GST_DEBUG ("No start code prefix in this buffer");
return GST_VC1_PARSER_NO_BDU;
}
bdu->sc_offset = off1;
bdu->offset = off1 + 4;
bdu->data = (guint8 *) data;
bdu->type = (GstVC1StartCode) (data[bdu->offset - 1]);
if (bdu->type == GST_VC1_END_OF_SEQ) {
GST_DEBUG ("End-of-Seq BDU found");
bdu->size = 0;
return GST_VC1_PARSER_OK;
}
off2 = scan_for_start_codes (data + bdu->offset, size - bdu->offset);
if (off2 < 0) {
GST_DEBUG ("Bdu start %d, No end found", bdu->offset);
return GST_VC1_PARSER_NO_BDU_END;
}
if (off2 > 0 && data[bdu->offset + off2 - 1] == 00)
off2--;
bdu->size = off2;
GST_DEBUG ("Complete bdu found. Off: %d, Size: %d", bdu->offset, bdu->size);
return GST_VC1_PARSER_OK;
}
/**
* gst_vc1_parse_sequence_layer:
* @data: The data to parse
* @size: the size of @data
* @structa: The #GstVC1SeqLayer to set.
*
* Parses @data, and fills @seqlayer fields.
*
* Returns: a #GstVC1ParserResult
*/
GstVC1ParserResult
gst_vc1_parse_sequence_layer (const guint8 * data, gsize size,
GstVC1SeqLayer * seqlayer)
{
guint32 tmp;
GstBitReader br = GST_BIT_READER_INIT (data, size);
g_return_val_if_fail (seqlayer != NULL, GST_VC1_PARSER_ERROR);
READ_UINT32 (&br, tmp, 8);
if (tmp != 0xC5)
goto failed;
READ_UINT32 (&br, seqlayer->numframes, 24);
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;
if (parse_sequence_header_struct_a (&br, &seqlayer->struct_a) ==
GST_VC1_PARSER_ERROR)
goto failed;
READ_UINT32 (&br, tmp, 32);
if (tmp != 0x0C)
goto failed;
if (parse_sequence_header_struct_b (&br, &seqlayer->struct_b) ==
GST_VC1_PARSER_ERROR)
goto failed;
return GST_VC1_PARSER_OK;
failed:
GST_WARNING ("Failed to parse sequence layer");
return GST_VC1_PARSER_ERROR;
}
/**
* gst_vc1_parse_sequence_header_struct_a:
* @data: The data to parse
* @size: the size of @data
* @structa: The #GstVC1SeqStructA to set.
*
* Parses @data, and fills @structa fields.
*
* Returns: a #GstVC1ParserResult
*/
GstVC1ParserResult
gst_vc1_parse_sequence_header_struct_a (const guint8 * data,
gsize size, GstVC1SeqStructA * structa)
{
GstBitReader br = GST_BIT_READER_INIT (data, size);
g_return_val_if_fail (structa != NULL, GST_VC1_PARSER_ERROR);
return parse_sequence_header_struct_a (&br, structa);
}
/**
* gst_vc1_parse_sequence_header_struct_b:
* @data: The data to parse
* @size: the size of @data
* @structa: The #GstVC1SeqStructB to set.
*
* Parses @data, and fills @structb fields.
*
* Returns: a #GstVC1ParserResult
*/
GstVC1ParserResult
gst_vc1_parse_sequence_header_struct_b (const guint8 * data,
gsize size, GstVC1SeqStructB * structb)
{
GstBitReader br = GST_BIT_READER_INIT (data, size);
g_return_val_if_fail (structb != NULL, GST_VC1_PARSER_ERROR);
return parse_sequence_header_struct_b (&br, structb);
}
/**
* gst_vc1_parse_sequence_header_struct_c:
* @data: The data to parse
* @size: the size of @data
* @structc: The #GstVC1SeqStructC to set.
*
* Parses @data, and fills @structc fields.
*
* Returns: a #GstVC1ParserResult
*/
GstVC1ParserResult
gst_vc1_parse_sequence_header_struct_c (const guint8 * data, gsize size,
GstVC1SeqStructC * structc)
{
GstBitReader br = GST_BIT_READER_INIT (data, size);
g_return_val_if_fail (structc != NULL, GST_VC1_PARSER_ERROR);
return parse_sequence_header_struct_c (&br, structc);
}
/**
* gst_vc1_parse_sequence_header:
* @data: The data to parse
* @size: the size of @data
* @seqhdr: The #GstVC1SeqHdr to set.
*
* Parses @data, and fills @seqhdr fields.
*
* Returns: a #GstVC1ParserResult
*/
GstVC1ParserResult
gst_vc1_parse_sequence_header (const guint8 * data, gsize size,
GstVC1SeqHdr * seqhdr)
{
GstBitReader br = GST_BIT_READER_INIT (data, size);
g_return_val_if_fail (seqhdr != NULL, GST_VC1_PARSER_ERROR);
if (parse_sequence_header_struct_c (&br, &seqhdr->struct_c) ==
GST_VC1_PARSER_ERROR)
goto failed;
/* Convenience field */
seqhdr->profile = seqhdr->struct_c.profile;
if (seqhdr->profile == GST_VC1_PROFILE_ADVANCED)
return parse_sequence_header_advanced (seqhdr, &br);
/* Compute MB height and width */
calculate_mb_size (seqhdr, seqhdr->struct_c.coded_width,
seqhdr->struct_c.coded_height);
return GST_VC1_PARSER_OK;
failed:
GST_WARNING ("Failed to parse sequence header");
return GST_VC1_PARSER_ERROR;
}
/**
* gst_vc1_parse_entry_point_header:
* @data: The data to parse
* @size: the size of @data
* @entrypoint: (out): The #GstVC1EntryPointHdr to set.
* @seqhdr: The #GstVC1SeqHdr currently being parsed
*
* Parses @data, and sets @entrypoint fields.
*
* Returns: a #GstVC1EntryPointHdr
*/
GstVC1ParserResult
gst_vc1_parse_entry_point_header (const guint8 * data, gsize size,
GstVC1EntryPointHdr * entrypoint, GstVC1SeqHdr * seqhdr)
{
GstBitReader br;
guint8 i;
GstVC1AdvancedSeqHdr *advanced = &seqhdr->advanced;
g_return_val_if_fail (entrypoint != NULL, GST_VC1_PARSER_ERROR);
gst_bit_reader_init (&br, data, size);
if (gst_bit_reader_get_remaining (&br) < 13)
goto failed;
entrypoint->broken_link = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
entrypoint->closed_entry = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
entrypoint->panscan_flag = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
entrypoint->refdist_flag = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
entrypoint->loopfilter = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
entrypoint->fastuvmc = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
entrypoint->extended_mv = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
entrypoint->dquant = gst_bit_reader_get_bits_uint8_unchecked (&br, 2);
entrypoint->vstransform = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
entrypoint->overlap = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
entrypoint->quantizer = gst_bit_reader_get_bits_uint8_unchecked (&br, 2);
if (advanced->hrd_param_flag) {
if (seqhdr->advanced.hrd_param.hrd_num_leaky_buckets >
MAX_HRD_NUM_LEAKY_BUCKETS) {
GST_WARNING
("hrd_num_leaky_buckets (%d) > MAX_HRD_NUM_LEAKY_BUCKETS (%d)",
seqhdr->advanced.hrd_param.hrd_num_leaky_buckets,
MAX_HRD_NUM_LEAKY_BUCKETS);
goto failed;
}
for (i = 0; i < seqhdr->advanced.hrd_param.hrd_num_leaky_buckets; i++)
READ_UINT8 (&br, entrypoint->hrd_full[i], 8);
}
READ_UINT8 (&br, entrypoint->coded_size_flag, 1);
if (entrypoint->coded_size_flag) {
READ_UINT16 (&br, entrypoint->coded_width, 12);
READ_UINT16 (&br, entrypoint->coded_height, 12);
entrypoint->coded_height = (entrypoint->coded_height + 1) << 1;
entrypoint->coded_width = (entrypoint->coded_width + 1) << 1;
calculate_mb_size (seqhdr, entrypoint->coded_width,
entrypoint->coded_height);
}
if (entrypoint->extended_mv)
READ_UINT8 (&br, entrypoint->extended_dmv, 1);
READ_UINT8 (&br, entrypoint->range_mapy_flag, 1);
if (entrypoint->range_mapy_flag)
READ_UINT8 (&br, entrypoint->range_mapy, 3);
READ_UINT8 (&br, entrypoint->range_mapuv_flag, 1);
if (entrypoint->range_mapy_flag)
READ_UINT8 (&br, entrypoint->range_mapuv, 3);
advanced->entrypoint = *entrypoint;
return GST_VC1_PARSER_OK;
failed:
GST_WARNING ("Failed to parse entry point header");
return GST_VC1_PARSER_ERROR;
}
/**
* gst_vc1_parse_frame_layer:
* @data: The data to parse
* @size: the size of @data
* @framelayer: The #GstVC1FrameLayer to fill.
*
* Parses @data, and fills @framelayer fields.
*
* Returns: a #GstVC1ParserResult
*/
GstVC1ParserResult
gst_vc1_parse_frame_layer (const guint8 * data, gsize size,
GstVC1FrameLayer * framelayer)
{
GstBitReader br = GST_BIT_READER_INIT (data, size);
if (gst_bit_reader_get_remaining (&br) < 64) {
GST_WARNING ("Could not parse frame layer");
return GST_VC1_PARSER_ERROR;
}
/* set default values */
framelayer->skiped_p_frame = 0;
framelayer->key = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
gst_bit_reader_skip_unchecked (&br, 7);
framelayer->framesize = gst_bit_reader_get_bits_uint32_unchecked (&br, 24);
if (framelayer->framesize == 0 || framelayer->framesize == 1)
framelayer->skiped_p_frame = 1;
/* compute next_framelayer_offset */
framelayer->next_framelayer_offset = framelayer->framesize + 8;
framelayer->timestamp = gst_bit_reader_get_bits_uint32_unchecked (&br, 32);
return GST_VC1_PARSER_OK;
}
/**
* gst_vc1_parse_frame_header:
* @data: The data to parse
* @size: the size of @data
* @framehdr: The #GstVC1FrameHdr to fill.
* @seqhdr: The #GstVC1SeqHdr currently being parsed
* @bitplanes: The #GstVC1BitPlanes to store bitplanes in or %NULL
*
* Parses @data, and fills @entrypoint fields.
*
* Returns: a #GstVC1ParserResult
*/
GstVC1ParserResult
gst_vc1_parse_frame_header (const guint8 * data, gsize size,
GstVC1FrameHdr * framehdr, GstVC1SeqHdr * seqhdr,
GstVC1BitPlanes * bitplanes)
{
GstBitReader br;
GstVC1ParserResult result;
gst_bit_reader_init (&br, data, size);
if (seqhdr->profile == GST_VC1_PROFILE_ADVANCED)
result = parse_frame_header_advanced (&br, framehdr, seqhdr, bitplanes,
FALSE);
else
result = parse_frame_header (&br, framehdr, seqhdr, bitplanes);
framehdr->header_size = gst_bit_reader_get_pos (&br);
return result;
}
/**
* gst_vc1_parse_field_header:
* @data: The data to parse
* @size: the size of @data
* @fieldhdr: The #GstVC1FrameHdr to fill.
* @seqhdr: The #GstVC1SeqHdr currently being parsed
* @bitplanes: The #GstVC1BitPlanes to store bitplanes in or %NULL
*
* Parses @data, and fills @fieldhdr fields.
*
* Returns: a #GstVC1ParserResult
*/
GstVC1ParserResult
gst_vc1_parse_field_header (const guint8 * data, gsize size,
GstVC1FrameHdr * fieldhdr, GstVC1SeqHdr * seqhdr,
GstVC1BitPlanes * bitplanes)
{
GstBitReader br;
GstVC1ParserResult result;
gst_bit_reader_init (&br, data, size);
result = parse_frame_header_advanced (&br, fieldhdr, seqhdr, bitplanes, TRUE);
return result;
}
/**
* gst_vc1_bitplanes_new:
* @seqhdr: The #GstVC1SeqHdr from which to set @bitplanes
*
* Creates a new #GstVC1BitPlanes. It should be freed with
* gst_vc1_bitplanes_free() after use.
*
* Returns: a new #GstVC1BitPlanes
*/
GstVC1BitPlanes *
gst_vc1_bitplanes_new (void)
{
return g_slice_new0 (GstVC1BitPlanes);
}
/**
* gst_vc1_bitplane_free:
* @bitplanes: the #GstVC1BitPlanes to free
*
* Frees @bitplanes.
*/
void
gst_vc1_bitplanes_free (GstVC1BitPlanes * bitplanes)
{
gst_vc1_bitplanes_free_1 (bitplanes);
g_slice_free (GstVC1BitPlanes, bitplanes);
}
/**
* gst_vc1_bitplane_free_1:
* @bitplanes: The #GstVC1BitPlanes to free
*
* Frees @bitplanes fields.
*/
void
gst_vc1_bitplanes_free_1 (GstVC1BitPlanes * bitplanes)
{
g_free (bitplanes->acpred);
g_free (bitplanes->fieldtx);
g_free (bitplanes->overflags);
g_free (bitplanes->mvtypemb);
g_free (bitplanes->skipmb);
g_free (bitplanes->directmb);
g_free (bitplanes->forwardmb);
}
/**
* gst_vc1_bitplanes_ensure_size:
* @bitplanes: The #GstVC1BitPlanes to reset
* @seqhdr: The #GstVC1SeqHdr from which to set @bitplanes
*
* Fills the @bitplanes structure from @seqhdr, this function
* should be called after #gst_vc1_parse_sequence_header if
* in simple or main mode, or after #gst_vc1_parse_entry_point_header
* if in advanced mode.
*
* Returns: %TRUE if everything went fine, %FALSE otherwize
*/
gboolean
gst_vc1_bitplanes_ensure_size (GstVC1BitPlanes * bitplanes,
GstVC1SeqHdr * seqhdr)
{
g_return_val_if_fail (bitplanes != NULL, FALSE);
g_return_val_if_fail (seqhdr != NULL, FALSE);
if (bitplanes->size) {
bitplanes->size = seqhdr->mb_height * seqhdr->mb_stride;
bitplanes->acpred =
g_realloc_n (bitplanes->acpred, bitplanes->size, sizeof (guint8));
bitplanes->fieldtx =
g_realloc_n (bitplanes->fieldtx, bitplanes->size, sizeof (guint8));
bitplanes->overflags =
g_realloc_n (bitplanes->overflags, bitplanes->size, sizeof (guint8));
bitplanes->mvtypemb =
g_realloc_n (bitplanes->mvtypemb, bitplanes->size, sizeof (guint8));
bitplanes->skipmb =
g_realloc_n (bitplanes->skipmb, bitplanes->size, sizeof (guint8));
bitplanes->directmb =
g_realloc_n (bitplanes->directmb, bitplanes->size, sizeof (guint8));
bitplanes->forwardmb =
g_realloc_n (bitplanes->forwardmb, bitplanes->size, sizeof (guint8));
} else {
bitplanes->size = seqhdr->mb_height * seqhdr->mb_stride;
bitplanes->acpred = g_malloc0 (bitplanes->size * sizeof (guint8));
bitplanes->fieldtx = g_malloc0 (bitplanes->size * sizeof (guint8));
bitplanes->overflags = g_malloc0 (bitplanes->size * sizeof (guint8));
bitplanes->mvtypemb = g_malloc0 (bitplanes->size * sizeof (guint8));
bitplanes->skipmb = g_malloc0 (bitplanes->size * sizeof (guint8));
bitplanes->directmb = g_malloc0 (bitplanes->size * sizeof (guint8));
bitplanes->forwardmb = g_malloc0 (bitplanes->size * sizeof (guint8));
}
return TRUE;
}
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