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codecparsers: vc1: fix VLC decoding.

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Gwenole Beauchesne 2011-10-04 11:57:37 +02:00 committed by Thibault Saunier
parent 1a1935dacf
commit 52d8510ee0
1 changed files with 137 additions and 128 deletions
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265
gst-libs/gst/codecparsers/gstvc1parser.c
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@ -100,6 +100,13 @@ ensure_debug_category (void)
} \
} 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,
@ -140,30 +147,34 @@ const guint8 mvmode2_table[2][4] = {
GST_VC1_MVMODE_1MV_HPEL_BILINEAR}
};
static const guint bfraction_vlc_table[] = {
0x00, 3, 128,
0x01, 3, 85,
0x02, 3, 170,
0x03, 3, 64,
0x04, 3, 192,
0x05, 3, 51,
0x06, 3, 102,
0x70, 3, 153,
0x71, 7, 204,
0x72, 7, 43,
0x73, 7, 215,
0x74, 7, 37,
0x75, 7, 74,
0x76, 7, 111,
0x77, 7, 148,
0x78, 7, 185,
0x79, 7, 222,
0x7a, 7, 32,
0x7b, 7, 96,
0x7c, 7, 160,
0x7d, 7, 224,
0x7e, 7, 0, /* Indicate sthat it is smtpe reserved */
0x7f, 7, GST_VC1_PICTURE_TYPE_BI
#define GST_VC1_BFRACTION_RESERVED (GST_VC1_BFRACTION_BASIS + 1)
#define GST_VC1_BFRACTION_PTYPE_BI (GST_VC1_BFRACTION_BASIS + 2)
/* 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 */
@ -178,88 +189,91 @@ enum
IMODE_COLSKIP
};
static const guint imode_vlc_table[] = {
0x02, 2, IMODE_NORM2, /* 10 */
0x03, 2, IMODE_NORM6, /* 11 */
0x02, 3, IMODE_ROWSKIP, /* 010 */
0x03, 3, IMODE_COLSKIP, /* 011 */
0x01, 3, IMODE_DIFF2, /* 001 */
0x01, 4, IMODE_DIFF6, /* 0001 */
0x00, 4, IMODE_RAW /* 0000 */
/* 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}
};
const guint vc1_norm2_codes_vlc_table[] = {
0x00, 1, 1,
0x03, 2, 3,
0x04, 3, 3,
0x05, 3, 2
/* 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}
};
const guint norm6_vlc_table[256] = {
0x001, 1, 0,
0x002, 4, 0,
0x003, 4, 0,
0x004, 4, 0,
0x005, 4, 0,
0x006, 4, 0,
0x007, 4, 0,
0x007, 6, 0,
0x000, 8, 0,
0x001, 8, 0,
0x002, 8, 0,
0x003, 8, 0,
0x004, 8, 0,
0x005, 8, 0,
0x006, 8, 0,
0x007, 8, 0,
0x008, 8, 0,
0x009, 8, 0,
0x00A, 8, 0,
0x00B, 8, 0,
0x00C, 8, 0,
0x00D, 8, 0,
0x00E, 8, 0,
0x037, 9, 0,
0x036, 9, 0,
0x035, 9, 0,
0x034, 9, 0,
0x033, 9, 0,
0x032, 9, 0,
0x047, 10, 0,
0x04B, 10, 0,
0x04D, 10, 0,
0x04E, 10, 0,
0x30E, 13, 0,
0x053, 10, 0,
0x055, 10, 0,
0x056, 10, 0,
0x30D, 13, 0,
0x059, 10, 0,
0x05A, 10, 0,
0x30C, 13, 0,
0x05C, 10, 0,
0x30B, 13, 0,
0x30A, 13, 0,
0x043, 10, 0,
0x045, 10, 0,
0x046, 10, 0,
0x309, 13, 0,
0x049, 10, 0,
0x04A, 10, 0,
0x308, 13, 0,
0x04C, 10, 0,
0x307, 13, 0,
0x306, 13, 0,
0x051, 10, 0,
0x052, 10, 0,
0x305, 13, 0,
0x054, 10, 0,
0x304, 13, 0,
0x303, 13, 0,
0x058, 10, 0,
0x302, 13, 0,
0x301, 13, 0,
0x300, 13, 0
/* 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}
};
static inline guint8
@ -345,32 +359,26 @@ calculate_nb_pan_scan_win (GstVC1AdvancedSeqHdr * advseqhdr,
}
}
/**
* table should look like:
* {Value, nbBits, Meaning,
* ...
* } nbBits must be increasing
*/
static gboolean
decode_vlc (GstBitReader * br, guint * res, const guint * table, guint length)
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 += 3) {
if (cbits != table[i + 1]) {
cbits = table[i + 1];
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]) {
if (value == table[i].cword) {
SKIP (br, cbits);
if (res)
*res = table[i + 2];
*res = table[i].value;
return TRUE;
}
@ -393,7 +401,8 @@ bitplane_decoding (GstBitReader * br, guint height,
guint i, j, offset = 0;
SKIP (br, 1);
if (!decode_vlc (br, &imode, imode_vlc_table, G_N_ELEMENTS (imode_vlc_table)))
if (!decode_vlc (br, &imode, vc1_imode_vlc_table,
G_N_ELEMENTS (vc1_imode_vlc_table)))
goto failed;
switch (imode) {
@ -415,8 +424,8 @@ bitplane_decoding (GstBitReader * br, guint height,
for (i = offset; i < height * width; i += 2) {
/*guint x; */
if (!decode_vlc (br, NULL, vc1_norm2_codes_vlc_table,
G_N_ELEMENTS (vc1_norm2_codes_vlc_table))) {
if (!decode_vlc (br, NULL, vc1_norm2_vlc_table,
G_N_ELEMENTS (vc1_norm2_vlc_table))) {
goto failed;
}
}
@ -431,8 +440,8 @@ bitplane_decoding (GstBitReader * br, guint height,
for (i = 0; i < height; i += 3) {
for (j = width & 1; j < width; j += 2) {
if (!decode_vlc (br, NULL, norm6_vlc_table,
G_N_ELEMENTS (norm6_vlc_table))) {
if (!decode_vlc (br, NULL, vc1_norm6_vlc_table,
G_N_ELEMENTS (vc1_norm6_vlc_table))) {
goto failed;
}
}
@ -440,8 +449,8 @@ bitplane_decoding (GstBitReader * br, guint height,
} else {
for (i = height & 1; i < height; i += 2) {
for (j = width % 3; j < width; j += 3) {
if (!decode_vlc (br, NULL, norm6_vlc_table,
G_N_ELEMENTS (norm6_vlc_table))) {
if (!decode_vlc (br, NULL, vc1_norm6_vlc_table,
G_N_ELEMENTS (vc1_norm6_vlc_table))) {
goto failed;
}
}
@ -806,13 +815,13 @@ parse_frame_header_advanced (GstBitReader * br, GstVC1FrameHdr * framehdr,
}
if (framehdr->ptype == GST_VC1_PICTURE_TYPE_B) {
if (!decode_vlc (br, (guint *) & pic->bfraction, bfraction_vlc_table,
G_N_ELEMENTS (bfraction_vlc_table)))
if (!decode_vlc (br, (guint *) & pic->bfraction, vc1_bfraction_vlc_table,
G_N_ELEMENTS (vc1_bfraction_vlc_table)))
goto failed;
GST_DEBUG ("bfraction %u", pic->bfraction);
if (pic->bfraction == GST_VC1_PICTURE_TYPE_BI) {
if (pic->bfraction == GST_VC1_BFRACTION_PTYPE_BI) {
framehdr->ptype = GST_VC1_PICTURE_TYPE_BI;
}
@ -1033,11 +1042,11 @@ parse_frame_header (GstBitReader * br, GstVC1FrameHdr * framehdr,
if (framehdr->ptype == GST_VC1_PICTURE_TYPE_B) {
if (!decode_vlc (br, (guint *) & pic->bfraction, bfraction_vlc_table,
G_N_ELEMENTS (bfraction_vlc_table)))
if (!decode_vlc (br, (guint *) & pic->bfraction, vc1_bfraction_vlc_table,
G_N_ELEMENTS (vc1_bfraction_vlc_table)))
goto failed;
if (pic->bfraction == GST_VC1_PICTURE_TYPE_BI) {
if (pic->bfraction == GST_VC1_BFRACTION_PTYPE_BI) {
framehdr->ptype = GST_VC1_PICTURE_TYPE_BI;
}
GST_DEBUG ("bfraction= %d", pic->bfraction);