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ffmpeg.wasm-core
Commit a05ea77c authored by Diego Biurrun's avatar Diego Biurrun
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mpeg12: reorder functions to avoid ugly forward declarations

parent a92d0fa5
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Showing with 920 additions and 931 deletions
libavcodec/mpeg12.c
View file @ a05ea77c
...@@ -49,1069 +49,1062 @@ ...@@ -49,1069 +49,1062 @@
#define MB_PTYPE_VLC_BITS 6 #define MB_PTYPE_VLC_BITS 6
#define MB_BTYPE_VLC_BITS 6 #define MB_BTYPE_VLC_BITS 6
static inline int mpeg1_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n); static VLC mv_vlc;
static inline int mpeg1_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n);
static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n);
static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n);
static inline int mpeg2_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n);
static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n);
static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n);
static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
static void exchange_uv(MpegEncContext *s);
static const enum PixelFormat pixfmt_xvmc_mpg2_420[] = { /* as H.263, but only 17 codes */
PIX_FMT_XVMC_MPEG2_IDCT, static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
PIX_FMT_XVMC_MPEG2_MC, {
PIX_FMT_NONE }; int code, sign, val, l, shift;
uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
if (code == 0) {
return pred;
}
if (code < 0) {
return 0xffff;
}
sign = get_bits1(&s->gb);
shift = fcode - 1;
val = code;
if (shift) {
val = (val - 1) << shift;
val |= get_bits(&s->gb, shift);
val++;
}
if (sign)
val = -val;
val += pred;
#define INIT_2D_VLC_RL(rl, static_size)\ /* modulo decoding */
{\ l = INT_BIT - 5 - shift;
static RL_VLC_ELEM rl_vlc_table[static_size];\ val = (val << l) >> l;
INIT_VLC_STATIC(&rl.vlc, TEX_VLC_BITS, rl.n + 2,\ return val;
&rl.table_vlc[0][1], 4, 2,\
&rl.table_vlc[0][0], 4, 2, static_size);\
\
rl.rl_vlc[0] = rl_vlc_table;\
init_2d_vlc_rl(&rl);\
} }
static void init_2d_vlc_rl(RLTable *rl) static inline int mpeg1_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
{ {
int i; int level, dc, diff, i, j, run;
int component;
RLTable *rl = &ff_rl_mpeg1;
uint8_t * const scantable = s->intra_scantable.permutated;
const uint16_t *quant_matrix = s->intra_matrix;
const int qscale = s->qscale;
for (i = 0; i < rl->vlc.table_size; i++) { /* DC coefficient */
int code = rl->vlc.table[i][0]; component = (n <= 3 ? 0 : n - 4 + 1);
int len = rl->vlc.table[i][1]; diff = decode_dc(&s->gb, component);
int level, run; if (diff >= 0xffff)
return -1;
dc = s->last_dc[component];
dc += diff;
s->last_dc[component] = dc;
block[0] = dc * quant_matrix[0];
av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
i = 0;
{
OPEN_READER(re, &s->gb);
/* now quantify & encode AC coefficients */
for (;;) {
UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
if (len == 0) { // illegal code if (level == 127) {
run = 65; break;
level = MAX_LEVEL; } else if (level != 0) {
} else if (len<0) { //more bits needed i += run;
run = 0; j = scantable[i];
level = code; level = (level * qscale * quant_matrix[j]) >> 4;
level = (level - 1) | 1;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
LAST_SKIP_BITS(re, &s->gb, 1);
} else { } else {
if (code == rl->n) { //esc /* escape */
run = 65; run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
level = 0; UPDATE_CACHE(re, &s->gb);
} else if (code == rl->n+1) { //eob level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
run = 0; if (level == -128) {
level = 127; level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
} else if (level == 0) {
level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
}
i += run;
j = scantable[i];
if (level < 0) {
level = -level;
level = (level * qscale * quant_matrix[j]) >> 4;
level = (level - 1) | 1;
level = -level;
} else { } else {
run = rl->table_run [code] + 1; level = (level * qscale * quant_matrix[j]) >> 4;
level = rl->table_level[code]; level = (level - 1) | 1;
} }
} }
rl->rl_vlc[0][i].len = len; if (i > 63) {
rl->rl_vlc[0][i].level = level; av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
rl->rl_vlc[0][i].run = run; return -1;
} }
}
void ff_mpeg12_common_init(MpegEncContext *s)
{
s->y_dc_scale_table =
s->c_dc_scale_table = ff_mpeg2_dc_scale_table[s->intra_dc_precision];
block[j] = level;
}
CLOSE_READER(re, &s->gb);
}
s->block_last_index[n] = i;
return 0;
} }
void ff_mpeg1_clean_buffers(MpegEncContext *s) int ff_mpeg1_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
{ {
s->last_dc[0] = 1 << (7 + s->intra_dc_precision); return mpeg1_decode_block_intra(s, block, n);
s->last_dc[1] = s->last_dc[0];
s->last_dc[2] = s->last_dc[0];
memset(s->last_mv, 0, sizeof(s->last_mv));
} }
static inline int mpeg1_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
/******************************************/
/* decoding */
VLC ff_dc_lum_vlc;
VLC ff_dc_chroma_vlc;
static VLC mv_vlc;
static VLC mbincr_vlc;
static VLC mb_ptype_vlc;
static VLC mb_btype_vlc;
static VLC mb_pat_vlc;
av_cold void ff_mpeg12_init_vlcs(void)
{ {
static int done = 0; int level, i, j, run;
RLTable *rl = &ff_rl_mpeg1;
if (!done) { uint8_t * const scantable = s->intra_scantable.permutated;
done = 1; const uint16_t *quant_matrix = s->inter_matrix;
const int qscale = s->qscale;
INIT_VLC_STATIC(&ff_dc_lum_vlc, DC_VLC_BITS, 12,
ff_mpeg12_vlc_dc_lum_bits, 1, 1,
ff_mpeg12_vlc_dc_lum_code, 2, 2, 512);
INIT_VLC_STATIC(&ff_dc_chroma_vlc, DC_VLC_BITS, 12,
ff_mpeg12_vlc_dc_chroma_bits, 1, 1,
ff_mpeg12_vlc_dc_chroma_code, 2, 2, 514);
INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 17,
&ff_mpeg12_mbMotionVectorTable[0][1], 2, 1,
&ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 518);
INIT_VLC_STATIC(&mbincr_vlc, MBINCR_VLC_BITS, 36,
&ff_mpeg12_mbAddrIncrTable[0][1], 2, 1,
&ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 538);
INIT_VLC_STATIC(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
&ff_mpeg12_mbPatTable[0][1], 2, 1,
&ff_mpeg12_mbPatTable[0][0], 2, 1, 512);
INIT_VLC_STATIC(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7, {
&table_mb_ptype[0][1], 2, 1, OPEN_READER(re, &s->gb);
&table_mb_ptype[0][0], 2, 1, 64); i = -1;
INIT_VLC_STATIC(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11, // special case for first coefficient, no need to add second VLC table
&table_mb_btype[0][1], 2, 1, UPDATE_CACHE(re, &s->gb);
&table_mb_btype[0][0], 2, 1, 64); if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]); level = (3 * qscale * quant_matrix[0]) >> 5;
init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]); level = (level - 1) | 1;
if (GET_CACHE(re, &s->gb) & 0x40000000)
level = -level;
block[0] = level;
i++;
SKIP_BITS(re, &s->gb, 2);
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
goto end;
}
/* now quantify & encode AC coefficients */
for (;;) {
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
INIT_2D_VLC_RL(ff_rl_mpeg1, 680); if (level != 0) {
INIT_2D_VLC_RL(ff_rl_mpeg2, 674); i += run;
j = scantable[i];
level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
level = (level - 1) | 1;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
SKIP_BITS(re, &s->gb, 1);
} else {
/* escape */
run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
UPDATE_CACHE(re, &s->gb);
level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
if (level == -128) {
level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
} else if (level == 0) {
level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
}
i += run;
j = scantable[i];
if (level < 0) {
level = -level;
level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
level = (level - 1) | 1;
level = -level;
} else {
level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
level = (level - 1) | 1;
}
}
if (i > 63) {
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
return -1;
} }
}
static inline int get_dmv(MpegEncContext *s) block[j] = level;
{ if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
if (get_bits1(&s->gb)) break;
return 1 - (get_bits1(&s->gb) << 1); UPDATE_CACHE(re, &s->gb);
else }
end:
LAST_SKIP_BITS(re, &s->gb, 2);
CLOSE_READER(re, &s->gb);
}
s->block_last_index[n] = i;
return 0; return 0;
} }
static inline int get_qscale(MpegEncContext *s) static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
{
int qscale = get_bits(&s->gb, 5);
if (s->q_scale_type) {
return non_linear_qscale[qscale];
} else {
return qscale << 1;
}
}
/* motion type (for MPEG-2) */
#define MT_FIELD 1
#define MT_FRAME 2
#define MT_16X8 2
#define MT_DMV 3
static int mpeg_decode_mb(MpegEncContext *s, DCTELEM block[12][64])
{ {
int i, j, k, cbp, val, mb_type, motion_type; int level, i, j, run;
const int mb_block_count = 4 + (1 << s->chroma_format); RLTable *rl = &ff_rl_mpeg1;
uint8_t * const scantable = s->intra_scantable.permutated;
av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y); const int qscale = s->qscale;
assert(s->mb_skipped == 0);
if (s->mb_skip_run-- != 0) {
if (s->pict_type == AV_PICTURE_TYPE_P) {
s->mb_skipped = 1;
s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
} else {
int mb_type;
if (s->mb_x)
mb_type = s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
else
mb_type = s->current_picture.f.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1]; // FIXME not sure if this is allowed in MPEG at all
if (IS_INTRA(mb_type))
return -1;
s->current_picture.f.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
mb_type | MB_TYPE_SKIP;
// assert(s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1] & (MB_TYPE_16x16 | MB_TYPE_16x8));
if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0) {
s->mb_skipped = 1; OPEN_READER(re, &s->gb);
i = -1;
// special case for first coefficient, no need to add second VLC table
UPDATE_CACHE(re, &s->gb);
if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
level = (3 * qscale) >> 1;
level = (level - 1) | 1;
if (GET_CACHE(re, &s->gb) & 0x40000000)
level = -level;
block[0] = level;
i++;
SKIP_BITS(re, &s->gb, 2);
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
goto end;
} }
return 0; /* now quantify & encode AC coefficients */
} for (;;) {
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
switch (s->pict_type) { if (level != 0) {
default: i += run;
case AV_PICTURE_TYPE_I: j = scantable[i];
if (get_bits1(&s->gb) == 0) { level = ((level * 2 + 1) * qscale) >> 1;
if (get_bits1(&s->gb) == 0) { level = (level - 1) | 1;
av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y); level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
return -1; SKIP_BITS(re, &s->gb, 1);
}
mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
} else { } else {
mb_type = MB_TYPE_INTRA; /* escape */
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
UPDATE_CACHE(re, &s->gb);
level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
if (level == -128) {
level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
} else if (level == 0) {
level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
} }
break; i += run;
case AV_PICTURE_TYPE_P: j = scantable[i];
mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1); if (level < 0) {
if (mb_type < 0) { level = -level;
av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y); level = ((level * 2 + 1) * qscale) >> 1;
return -1; level = (level - 1) | 1;
level = -level;
} else {
level = ((level * 2 + 1) * qscale) >> 1;
level = (level - 1) | 1;
} }
mb_type = ptype2mb_type[mb_type];
break;
case AV_PICTURE_TYPE_B:
mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
if (mb_type < 0) {
av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
return -1;
} }
mb_type = btype2mb_type[mb_type];
block[j] = level;
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
break; break;
UPDATE_CACHE(re, &s->gb);
} }
av_dlog(s->avctx, "mb_type=%x\n", mb_type); end:
// motion_type = 0; /* avoid warning */ LAST_SKIP_BITS(re, &s->gb, 2);
if (IS_INTRA(mb_type)) { CLOSE_READER(re, &s->gb);
s->dsp.clear_blocks(s->block[0]);
if (!s->chroma_y_shift) {
s->dsp.clear_blocks(s->block[6]);
} }
s->block_last_index[n] = i;
return 0;
}
/* compute DCT type */
if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
!s->frame_pred_frame_dct) {
s->interlaced_dct = get_bits1(&s->gb);
}
if (IS_QUANT(mb_type)) static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n)
s->qscale = get_qscale(s); {
int level, i, j, run;
RLTable *rl = &ff_rl_mpeg1;
uint8_t * const scantable = s->intra_scantable.permutated;
const uint16_t *quant_matrix;
const int qscale = s->qscale;
int mismatch;
if (s->concealment_motion_vectors) { mismatch = 1;
/* just parse them */
if (s->picture_structure != PICT_FRAME)
skip_bits1(&s->gb); /* field select */
s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] = {
mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]); OPEN_READER(re, &s->gb);
s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] = i = -1;
mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]); if (n < 4)
quant_matrix = s->inter_matrix;
else
quant_matrix = s->chroma_inter_matrix;
skip_bits1(&s->gb); /* marker */ // special case for first coefficient, no need to add second VLC table
} else UPDATE_CACHE(re, &s->gb);
memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */ if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
s->mb_intra = 1; level= (3 * qscale * quant_matrix[0]) >> 5;
// if 1, we memcpy blocks in xvmcvideo if (GET_CACHE(re, &s->gb) & 0x40000000)
if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) { level = -level;
ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks block[0] = level;
if (s->swap_uv) { mismatch ^= level;
exchange_uv(s); i++;
} SKIP_BITS(re, &s->gb, 2);
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
goto end;
} }
if (s->codec_id == CODEC_ID_MPEG2VIDEO) { /* now quantify & encode AC coefficients */
if (s->flags2 & CODEC_FLAG2_FAST) { for (;;) {
for (i = 0; i < 6; i++) { GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
} if (level != 0) {
i += run;
j = scantable[i];
level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
SKIP_BITS(re, &s->gb, 1);
} else { } else {
for (i = 0; i < mb_block_count; i++) { /* escape */
if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0) run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
return -1; UPDATE_CACHE(re, &s->gb);
level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
i += run;
j = scantable[i];
if (level < 0) {
level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
level = -level;
} else {
level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
} }
} }
} else { if (i > 63) {
for (i = 0; i < 6; i++) { av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
return -1; return -1;
} }
}
} else {
if (mb_type & MB_TYPE_ZERO_MV) {
assert(mb_type & MB_TYPE_CBP);
s->mv_dir = MV_DIR_FORWARD; mismatch ^= level;
if (s->picture_structure == PICT_FRAME) { block[j] = level;
if (!s->frame_pred_frame_dct) if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
s->interlaced_dct = get_bits1(&s->gb); break;
s->mv_type = MV_TYPE_16X16; UPDATE_CACHE(re, &s->gb);
} else { }
s->mv_type = MV_TYPE_FIELD; end:
mb_type |= MB_TYPE_INTERLACED; LAST_SKIP_BITS(re, &s->gb, 2);
s->field_select[0][0] = s->picture_structure - 1; CLOSE_READER(re, &s->gb);
} }
block[63] ^= (mismatch & 1);
if (IS_QUANT(mb_type)) s->block_last_index[n] = i;
s->qscale = get_qscale(s); return 0;
}
s->last_mv[0][0][0] = 0; static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
s->last_mv[0][0][1] = 0; DCTELEM *block, int n)
s->last_mv[0][1][0] = 0; {
s->last_mv[0][1][1] = 0; int level, i, j, run;
s->mv[0][0][0] = 0; RLTable *rl = &ff_rl_mpeg1;
s->mv[0][0][1] = 0; uint8_t * const scantable = s->intra_scantable.permutated;
} else { const int qscale = s->qscale;
assert(mb_type & MB_TYPE_L0L1); OPEN_READER(re, &s->gb);
// FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED i = -1;
/* get additional motion vector type */
if (s->frame_pred_frame_dct) // special case for first coefficient, no need to add second VLC table
motion_type = MT_FRAME; UPDATE_CACHE(re, &s->gb);
else { if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
motion_type = get_bits(&s->gb, 2); level = (3 * qscale) >> 1;
if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type)) if (GET_CACHE(re, &s->gb) & 0x40000000)
s->interlaced_dct = get_bits1(&s->gb); level = -level;
block[0] = level;
i++;
SKIP_BITS(re, &s->gb, 2);
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
goto end;
} }
if (IS_QUANT(mb_type)) /* now quantify & encode AC coefficients */
s->qscale = get_qscale(s); for (;;) {
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
/* motion vectors */ if (level != 0) {
s->mv_dir = (mb_type >> 13) & 3; i += run;
av_dlog(s->avctx, "motion_type=%d\n", motion_type); j = scantable[i];
switch (motion_type) { level = ((level * 2 + 1) * qscale) >> 1;
case MT_FRAME: /* or MT_16X8 */ level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
if (s->picture_structure == PICT_FRAME) { SKIP_BITS(re, &s->gb, 1);
mb_type |= MB_TYPE_16x16;
s->mv_type = MV_TYPE_16X16;
for (i = 0; i < 2; i++) {
if (USES_LIST(mb_type, i)) {
/* MT_FRAME */
s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
/* full_pel: only for MPEG-1 */
if (s->full_pel[i]) {
s->mv[i][0][0] <<= 1;
s->mv[i][0][1] <<= 1;
}
}
}
} else { } else {
mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; /* escape */
s->mv_type = MV_TYPE_16X8; run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
for (i = 0; i < 2; i++) { UPDATE_CACHE(re, &s->gb);
if (USES_LIST(mb_type, i)) { level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
/* MT_16X8 */
for (j = 0; j < 2; j++) { i += run;
s->field_select[i][j] = get_bits1(&s->gb); j = scantable[i];
for (k = 0; k < 2; k++) { if (level < 0) {
val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], level = ((-level * 2 + 1) * qscale) >> 1;
s->last_mv[i][j][k]); level = -level;
s->last_mv[i][j][k] = val;
s->mv[i][j][k] = val;
}
}
}
}
}
break;
case MT_FIELD:
s->mv_type = MV_TYPE_FIELD;
if (s->picture_structure == PICT_FRAME) {
mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
for (i = 0; i < 2; i++) {
if (USES_LIST(mb_type, i)) {
for (j = 0; j < 2; j++) {
s->field_select[i][j] = get_bits1(&s->gb);
val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
s->last_mv[i][j][0]);
s->last_mv[i][j][0] = val;
s->mv[i][j][0] = val;
av_dlog(s->avctx, "fmx=%d\n", val);
val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
s->last_mv[i][j][1] >> 1);
s->last_mv[i][j][1] = val << 1;
s->mv[i][j][1] = val;
av_dlog(s->avctx, "fmy=%d\n", val);
}
}
}
} else { } else {
mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; level = ((level * 2 + 1) * qscale) >> 1;
for (i = 0; i < 2; i++) {
if (USES_LIST(mb_type, i)) {
s->field_select[i][0] = get_bits1(&s->gb);
for (k = 0; k < 2; k++) {
val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
s->last_mv[i][0][k]);
s->last_mv[i][0][k] = val;
s->last_mv[i][1][k] = val;
s->mv[i][0][k] = val;
}
}
} }
} }
break;
case MT_DMV:
s->mv_type = MV_TYPE_DMV;
for (i = 0; i < 2; i++) {
if (USES_LIST(mb_type, i)) {
int dmx, dmy, mx, my, m;
const int my_shift = s->picture_structure == PICT_FRAME;
mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0], block[j] = level;
s->last_mv[i][0][0]); if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
s->last_mv[i][0][0] = mx; break;
s->last_mv[i][1][0] = mx; UPDATE_CACHE(re, &s->gb);
dmx = get_dmv(s); }
my = mpeg_decode_motion(s, s->mpeg_f_code[i][1], end:
s->last_mv[i][0][1] >> my_shift); LAST_SKIP_BITS(re, &s->gb, 2);
dmy = get_dmv(s); CLOSE_READER(re, &s->gb);
s->block_last_index[n] = i;
return 0;
s->last_mv[i][0][1] = my << my_shift; }
s->last_mv[i][1][1] = my << my_shift;
s->mv[i][0][0] = mx;
s->mv[i][0][1] = my;
s->mv[i][1][0] = mx; // not used
s->mv[i][1][1] = my; // not used
if (s->picture_structure == PICT_FRAME) {
mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
// m = 1 + 2 * s->top_field_first; static inline int mpeg2_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
m = s->top_field_first ? 1 : 3; {
int level, dc, diff, i, j, run;
int component;
RLTable *rl;
uint8_t * const scantable = s->intra_scantable.permutated;
const uint16_t *quant_matrix;
const int qscale = s->qscale;
int mismatch;
/* top -> top pred */ /* DC coefficient */
s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx; if (n < 4) {
s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1; quant_matrix = s->intra_matrix;
m = 4 - m; component = 0;
s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
} else { } else {
mb_type |= MB_TYPE_16x16; quant_matrix = s->chroma_intra_matrix;
component = (n & 1) + 1;
s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
if (s->picture_structure == PICT_TOP_FIELD)
s->mv[i][2][1]--;
else
s->mv[i][2][1]++;
}
}
} }
break; diff = decode_dc(&s->gb, component);
default: if (diff >= 0xffff)
av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
return -1; return -1;
} dc = s->last_dc[component];
} dc += diff;
s->last_dc[component] = dc;
block[0] = dc << (3 - s->intra_dc_precision);
av_dlog(s->avctx, "dc=%d\n", block[0]);
mismatch = block[0] ^ 1;
i = 0;
if (s->intra_vlc_format)
rl = &ff_rl_mpeg2;
else
rl = &ff_rl_mpeg1;
s->mb_intra = 0; {
if (HAS_CBP(mb_type)) { OPEN_READER(re, &s->gb);
s->dsp.clear_blocks(s->block[0]); /* now quantify & encode AC coefficients */
for (;;) {
UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1); if (level == 127) {
if (mb_block_count > 6) { break;
cbp <<= mb_block_count - 6; } else if (level != 0) {
cbp |= get_bits(&s->gb, mb_block_count - 6); i += run;
s->dsp.clear_blocks(s->block[6]); j = scantable[i];
level = (level * qscale * quant_matrix[j]) >> 4;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
LAST_SKIP_BITS(re, &s->gb, 1);
} else {
/* escape */
run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
UPDATE_CACHE(re, &s->gb);
level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
i += run;
j = scantable[i];
if (level < 0) {
level = (-level * qscale * quant_matrix[j]) >> 4;
level = -level;
} else {
level = (level * qscale * quant_matrix[j]) >> 4;
} }
if (cbp <= 0) { }
av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y); if (i > 63) {
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
return -1; return -1;
} }
//if 1, we memcpy blocks in xvmcvideo mismatch ^= level;
if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) { block[j] = level;
ff_xvmc_pack_pblocks(s, cbp);
if (s->swap_uv) {
exchange_uv(s);
} }
CLOSE_READER(re, &s->gb);
} }
block[63] ^= mismatch & 1;
if (s->codec_id == CODEC_ID_MPEG2VIDEO) { s->block_last_index[n] = i;
if (s->flags2 & CODEC_FLAG2_FAST) { return 0;
for (i = 0; i < 6; i++) { }
if (cbp & 32) {
mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i); static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
{
int level, dc, diff, j, run;
int component;
RLTable *rl;
uint8_t * scantable = s->intra_scantable.permutated;
const uint16_t *quant_matrix;
const int qscale = s->qscale;
/* DC coefficient */
if (n < 4) {
quant_matrix = s->intra_matrix;
component = 0;
} else { } else {
s->block_last_index[i] = -1; quant_matrix = s->chroma_intra_matrix;
} component = (n & 1) + 1;
cbp += cbp;
} }
} else { diff = decode_dc(&s->gb, component);
cbp <<= 12-mb_block_count; if (diff >= 0xffff)
for (i = 0; i < mb_block_count; i++) {
if (cbp & (1 << 11)) {
if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
return -1; return -1;
dc = s->last_dc[component];
dc += diff;
s->last_dc[component] = dc;
block[0] = dc << (3 - s->intra_dc_precision);
if (s->intra_vlc_format)
rl = &ff_rl_mpeg2;
else
rl = &ff_rl_mpeg1;
{
OPEN_READER(re, &s->gb);
/* now quantify & encode AC coefficients */
for (;;) {
UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
if (level == 127) {
break;
} else if (level != 0) {
scantable += run;
j = *scantable;
level = (level * qscale * quant_matrix[j]) >> 4;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
LAST_SKIP_BITS(re, &s->gb, 1);
} else { } else {
s->block_last_index[i] = -1; /* escape */
} run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
cbp += cbp; UPDATE_CACHE(re, &s->gb);
level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
scantable += run;
j = *scantable;
if (level < 0) {
level = (-level * qscale * quant_matrix[j]) >> 4;
level = -level;
} else {
level = (level * qscale * quant_matrix[j]) >> 4;
} }
} }
} else {
if (s->flags2 & CODEC_FLAG2_FAST) { block[j] = level;
for (i = 0; i < 6; i++) {
if (cbp & 32) {
mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
} else {
s->block_last_index[i] = -1;
} }
cbp += cbp; CLOSE_READER(re, &s->gb);
} }
s->block_last_index[n] = scantable - s->intra_scantable.permutated;
return 0;
}
uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
#define INIT_2D_VLC_RL(rl, static_size)\
{\
static RL_VLC_ELEM rl_vlc_table[static_size];\
INIT_VLC_STATIC(&rl.vlc, TEX_VLC_BITS, rl.n + 2,\
&rl.table_vlc[0][1], 4, 2,\
&rl.table_vlc[0][0], 4, 2, static_size);\
\
rl.rl_vlc[0] = rl_vlc_table;\
init_2d_vlc_rl(&rl);\
}
static void init_2d_vlc_rl(RLTable *rl)
{
int i;
for (i = 0; i < rl->vlc.table_size; i++) {
int code = rl->vlc.table[i][0];
int len = rl->vlc.table[i][1];
int level, run;
if (len == 0) { // illegal code
run = 65;
level = MAX_LEVEL;
} else if (len<0) { //more bits needed
run = 0;
level = code;
} else { } else {
for (i = 0; i < 6; i++) { if (code == rl->n) { //esc
if (cbp & 32) { run = 65;
if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0) level = 0;
return -1; } else if (code == rl->n+1) { //eob
run = 0;
level = 127;
} else { } else {
s->block_last_index[i] = -1; run = rl->table_run [code] + 1;
} level = rl->table_level[code];
cbp += cbp;
}
}
} }
} else {
for (i = 0; i < 12; i++)
s->block_last_index[i] = -1;
} }
rl->rl_vlc[0][i].len = len;
rl->rl_vlc[0][i].level = level;
rl->rl_vlc[0][i].run = run;
} }
}
s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type; void ff_mpeg12_common_init(MpegEncContext *s)
{
s->y_dc_scale_table =
s->c_dc_scale_table = ff_mpeg2_dc_scale_table[s->intra_dc_precision];
return 0;
} }
/* as H.263, but only 17 codes */ void ff_mpeg1_clean_buffers(MpegEncContext *s)
static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
{ {
int code, sign, val, l, shift; s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
s->last_dc[1] = s->last_dc[0];
s->last_dc[2] = s->last_dc[0];
memset(s->last_mv, 0, sizeof(s->last_mv));
}
code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
if (code == 0) {
return pred;
}
if (code < 0) {
return 0xffff;
}
sign = get_bits1(&s->gb); /******************************************/
shift = fcode - 1; /* decoding */
val = code;
if (shift) {
val = (val - 1) << shift;
val |= get_bits(&s->gb, shift);
val++;
}
if (sign)
val = -val;
val += pred;
/* modulo decoding */ VLC ff_dc_lum_vlc;
l = INT_BIT - 5 - shift; VLC ff_dc_chroma_vlc;
val = (val << l) >> l;
return val; static VLC mbincr_vlc;
static VLC mb_ptype_vlc;
static VLC mb_btype_vlc;
static VLC mb_pat_vlc;
av_cold void ff_mpeg12_init_vlcs(void)
{
static int done = 0;
if (!done) {
done = 1;
INIT_VLC_STATIC(&ff_dc_lum_vlc, DC_VLC_BITS, 12,
ff_mpeg12_vlc_dc_lum_bits, 1, 1,
ff_mpeg12_vlc_dc_lum_code, 2, 2, 512);
INIT_VLC_STATIC(&ff_dc_chroma_vlc, DC_VLC_BITS, 12,
ff_mpeg12_vlc_dc_chroma_bits, 1, 1,
ff_mpeg12_vlc_dc_chroma_code, 2, 2, 514);
INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 17,
&ff_mpeg12_mbMotionVectorTable[0][1], 2, 1,
&ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 518);
INIT_VLC_STATIC(&mbincr_vlc, MBINCR_VLC_BITS, 36,
&ff_mpeg12_mbAddrIncrTable[0][1], 2, 1,
&ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 538);
INIT_VLC_STATIC(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
&ff_mpeg12_mbPatTable[0][1], 2, 1,
&ff_mpeg12_mbPatTable[0][0], 2, 1, 512);
INIT_VLC_STATIC(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
&table_mb_ptype[0][1], 2, 1,
&table_mb_ptype[0][0], 2, 1, 64);
INIT_VLC_STATIC(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
&table_mb_btype[0][1], 2, 1,
&table_mb_btype[0][0], 2, 1, 64);
init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
INIT_2D_VLC_RL(ff_rl_mpeg1, 680);
INIT_2D_VLC_RL(ff_rl_mpeg2, 674);
}
} }
static inline int mpeg1_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n) static inline int get_dmv(MpegEncContext *s)
{ {
int level, dc, diff, i, j, run; if (get_bits1(&s->gb))
int component; return 1 - (get_bits1(&s->gb) << 1);
RLTable *rl = &ff_rl_mpeg1; else
uint8_t * const scantable = s->intra_scantable.permutated; return 0;
const uint16_t *quant_matrix = s->intra_matrix; }
const int qscale = s->qscale;
/* DC coefficient */
component = (n <= 3 ? 0 : n - 4 + 1);
diff = decode_dc(&s->gb, component);
if (diff >= 0xffff)
return -1;
dc = s->last_dc[component];
dc += diff;
s->last_dc[component] = dc;
block[0] = dc * quant_matrix[0];
av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
i = 0;
{
OPEN_READER(re, &s->gb);
/* now quantify & encode AC coefficients */
for (;;) {
UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
if (level == 127) { static inline int get_qscale(MpegEncContext *s)
break; {
} else if (level != 0) { int qscale = get_bits(&s->gb, 5);
i += run; if (s->q_scale_type) {
j = scantable[i]; return non_linear_qscale[qscale];
level = (level * qscale * quant_matrix[j]) >> 4;
level = (level - 1) | 1;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
LAST_SKIP_BITS(re, &s->gb, 1);
} else {
/* escape */
run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
UPDATE_CACHE(re, &s->gb);
level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
if (level == -128) {
level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
} else if (level == 0) {
level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
}
i += run;
j = scantable[i];
if (level < 0) {
level = -level;
level = (level * qscale * quant_matrix[j]) >> 4;
level = (level - 1) | 1;
level = -level;
} else { } else {
level = (level * qscale * quant_matrix[j]) >> 4; return qscale << 1;
level = (level - 1) | 1;
}
}
if (i > 63) {
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
block[j] = level;
}
CLOSE_READER(re, &s->gb);
} }
s->block_last_index[n] = i;
return 0;
} }
int ff_mpeg1_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n) static void exchange_uv(MpegEncContext *s)
{ {
return mpeg1_decode_block_intra(s, block, n); DCTELEM (*tmp)[64];
tmp = s->pblocks[4];
s->pblocks[4] = s->pblocks[5];
s->pblocks[5] = tmp;
} }
static inline int mpeg1_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n) /* motion type (for MPEG-2) */
#define MT_FIELD 1
#define MT_FRAME 2
#define MT_16X8 2
#define MT_DMV 3
static int mpeg_decode_mb(MpegEncContext *s, DCTELEM block[12][64])
{ {
int level, i, j, run; int i, j, k, cbp, val, mb_type, motion_type;
RLTable *rl = &ff_rl_mpeg1; const int mb_block_count = 4 + (1 << s->chroma_format);
uint8_t * const scantable = s->intra_scantable.permutated;
const uint16_t *quant_matrix = s->inter_matrix;
const int qscale = s->qscale;
{ av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
OPEN_READER(re, &s->gb);
i = -1;
// special case for first coefficient, no need to add second VLC table
UPDATE_CACHE(re, &s->gb);
if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
level = (3 * qscale * quant_matrix[0]) >> 5;
level = (level - 1) | 1;
if (GET_CACHE(re, &s->gb) & 0x40000000)
level = -level;
block[0] = level;
i++;
SKIP_BITS(re, &s->gb, 2);
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
goto end;
}
/* now quantify & encode AC coefficients */
for (;;) {
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
if (level != 0) { assert(s->mb_skipped == 0);
i += run;
j = scantable[i]; if (s->mb_skip_run-- != 0) {
level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; if (s->pict_type == AV_PICTURE_TYPE_P) {
level = (level - 1) | 1; s->mb_skipped = 1;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
SKIP_BITS(re, &s->gb, 1);
} else { } else {
/* escape */ int mb_type;
run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
UPDATE_CACHE(re, &s->gb); if (s->mb_x)
level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); mb_type = s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
if (level == -128) { else
level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8); mb_type = s->current_picture.f.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1]; // FIXME not sure if this is allowed in MPEG at all
} else if (level == 0) { if (IS_INTRA(mb_type))
level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8); return -1;
s->current_picture.f.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
mb_type | MB_TYPE_SKIP;
// assert(s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1] & (MB_TYPE_16x16 | MB_TYPE_16x8));
if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
s->mb_skipped = 1;
} }
i += run;
j = scantable[i]; return 0;
if (level < 0) { }
level = -level;
level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; switch (s->pict_type) {
level = (level - 1) | 1; default:
level = -level; case AV_PICTURE_TYPE_I:
if (get_bits1(&s->gb) == 0) {
if (get_bits1(&s->gb) == 0) {
av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
} else { } else {
level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; mb_type = MB_TYPE_INTRA;
level = (level - 1) | 1;
} }
break;
case AV_PICTURE_TYPE_P:
mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
if (mb_type < 0) {
av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
return -1;
} }
if (i > 63) { mb_type = ptype2mb_type[mb_type];
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); break;
case AV_PICTURE_TYPE_B:
mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
if (mb_type < 0) {
av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
return -1; return -1;
} }
mb_type = btype2mb_type[mb_type];
block[j] = level;
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
break; break;
UPDATE_CACHE(re, &s->gb);
} }
end: av_dlog(s->avctx, "mb_type=%x\n", mb_type);
LAST_SKIP_BITS(re, &s->gb, 2); // motion_type = 0; /* avoid warning */
CLOSE_READER(re, &s->gb); if (IS_INTRA(mb_type)) {
s->dsp.clear_blocks(s->block[0]);
if (!s->chroma_y_shift) {
s->dsp.clear_blocks(s->block[6]);
} }
s->block_last_index[n] = i;
return 0;
}
static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n) /* compute DCT type */
{ if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
int level, i, j, run; !s->frame_pred_frame_dct) {
RLTable *rl = &ff_rl_mpeg1; s->interlaced_dct = get_bits1(&s->gb);
uint8_t * const scantable = s->intra_scantable.permutated; }
const int qscale = s->qscale;
{ if (IS_QUANT(mb_type))
OPEN_READER(re, &s->gb); s->qscale = get_qscale(s);
i = -1;
// special case for first coefficient, no need to add second VLC table if (s->concealment_motion_vectors) {
UPDATE_CACHE(re, &s->gb); /* just parse them */
if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { if (s->picture_structure != PICT_FRAME)
level = (3 * qscale) >> 1; skip_bits1(&s->gb); /* field select */
level = (level - 1) | 1;
if (GET_CACHE(re, &s->gb) & 0x40000000) s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
level = -level; mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
block[0] = level; s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
i++; mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
SKIP_BITS(re, &s->gb, 2);
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) skip_bits1(&s->gb); /* marker */
goto end; } else
memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
s->mb_intra = 1;
// if 1, we memcpy blocks in xvmcvideo
if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
if (s->swap_uv) {
exchange_uv(s);
}
} }
/* now quantify & encode AC coefficients */ if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
for (;;) { if (s->flags2 & CODEC_FLAG2_FAST) {
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); for (i = 0; i < 6; i++) {
mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
if (level != 0) {
i += run;
j = scantable[i];
level = ((level * 2 + 1) * qscale) >> 1;
level = (level - 1) | 1;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
SKIP_BITS(re, &s->gb, 1);
} else {
/* escape */
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
UPDATE_CACHE(re, &s->gb);
level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
if (level == -128) {
level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
} else if (level == 0) {
level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
} }
i += run;
j = scantable[i];
if (level < 0) {
level = -level;
level = ((level * 2 + 1) * qscale) >> 1;
level = (level - 1) | 1;
level = -level;
} else { } else {
level = ((level * 2 + 1) * qscale) >> 1; for (i = 0; i < mb_block_count; i++) {
level = (level - 1) | 1; if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
return -1;
} }
} }
} else {
block[j] = level; for (i = 0; i < 6; i++) {
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
break; return -1;
UPDATE_CACHE(re, &s->gb);
} }
end:
LAST_SKIP_BITS(re, &s->gb, 2);
CLOSE_READER(re, &s->gb);
} }
s->block_last_index[n] = i; } else {
return 0; if (mb_type & MB_TYPE_ZERO_MV) {
} assert(mb_type & MB_TYPE_CBP);
static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n)
{
int level, i, j, run;
RLTable *rl = &ff_rl_mpeg1;
uint8_t * const scantable = s->intra_scantable.permutated;
const uint16_t *quant_matrix;
const int qscale = s->qscale;
int mismatch;
mismatch = 1;
{
OPEN_READER(re, &s->gb);
i = -1;
if (n < 4)
quant_matrix = s->inter_matrix;
else
quant_matrix = s->chroma_inter_matrix;
// special case for first coefficient, no need to add second VLC table s->mv_dir = MV_DIR_FORWARD;
UPDATE_CACHE(re, &s->gb); if (s->picture_structure == PICT_FRAME) {
if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { if (!s->frame_pred_frame_dct)
level= (3 * qscale * quant_matrix[0]) >> 5; s->interlaced_dct = get_bits1(&s->gb);
if (GET_CACHE(re, &s->gb) & 0x40000000) s->mv_type = MV_TYPE_16X16;
level = -level; } else {
block[0] = level; s->mv_type = MV_TYPE_FIELD;
mismatch ^= level; mb_type |= MB_TYPE_INTERLACED;
i++; s->field_select[0][0] = s->picture_structure - 1;
SKIP_BITS(re, &s->gb, 2);
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
goto end;
} }
/* now quantify & encode AC coefficients */ if (IS_QUANT(mb_type))
for (;;) { s->qscale = get_qscale(s);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
if (level != 0) { s->last_mv[0][0][0] = 0;
i += run; s->last_mv[0][0][1] = 0;
j = scantable[i]; s->last_mv[0][1][0] = 0;
level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; s->last_mv[0][1][1] = 0;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); s->mv[0][0][0] = 0;
SKIP_BITS(re, &s->gb, 1); s->mv[0][0][1] = 0;
} else { } else {
/* escape */ assert(mb_type & MB_TYPE_L0L1);
run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
UPDATE_CACHE(re, &s->gb); /* get additional motion vector type */
level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); if (s->frame_pred_frame_dct)
motion_type = MT_FRAME;
else {
motion_type = get_bits(&s->gb, 2);
if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
s->interlaced_dct = get_bits1(&s->gb);
}
i += run; if (IS_QUANT(mb_type))
j = scantable[i]; s->qscale = get_qscale(s);
if (level < 0) {
level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5; /* motion vectors */
level = -level; s->mv_dir = (mb_type >> 13) & 3;
av_dlog(s->avctx, "motion_type=%d\n", motion_type);
switch (motion_type) {
case MT_FRAME: /* or MT_16X8 */
if (s->picture_structure == PICT_FRAME) {
mb_type |= MB_TYPE_16x16;
s->mv_type = MV_TYPE_16X16;
for (i = 0; i < 2; i++) {
if (USES_LIST(mb_type, i)) {
/* MT_FRAME */
s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
/* full_pel: only for MPEG-1 */
if (s->full_pel[i]) {
s->mv[i][0][0] <<= 1;
s->mv[i][0][1] <<= 1;
}
}
}
} else { } else {
level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
s->mv_type = MV_TYPE_16X8;
for (i = 0; i < 2; i++) {
if (USES_LIST(mb_type, i)) {
/* MT_16X8 */
for (j = 0; j < 2; j++) {
s->field_select[i][j] = get_bits1(&s->gb);
for (k = 0; k < 2; k++) {
val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
s->last_mv[i][j][k]);
s->last_mv[i][j][k] = val;
s->mv[i][j][k] = val;
}
}
} }
} }
if (i > 63) {
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
return -1;
} }
mismatch ^= level;
block[j] = level;
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
break; break;
UPDATE_CACHE(re, &s->gb); case MT_FIELD:
s->mv_type = MV_TYPE_FIELD;
if (s->picture_structure == PICT_FRAME) {
mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
for (i = 0; i < 2; i++) {
if (USES_LIST(mb_type, i)) {
for (j = 0; j < 2; j++) {
s->field_select[i][j] = get_bits1(&s->gb);
val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
s->last_mv[i][j][0]);
s->last_mv[i][j][0] = val;
s->mv[i][j][0] = val;
av_dlog(s->avctx, "fmx=%d\n", val);
val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
s->last_mv[i][j][1] >> 1);
s->last_mv[i][j][1] = val << 1;
s->mv[i][j][1] = val;
av_dlog(s->avctx, "fmy=%d\n", val);
} }
end:
LAST_SKIP_BITS(re, &s->gb, 2);
CLOSE_READER(re, &s->gb);
} }
block[63] ^= (mismatch & 1); }
} else {
mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
for (i = 0; i < 2; i++) {
if (USES_LIST(mb_type, i)) {
s->field_select[i][0] = get_bits1(&s->gb);
for (k = 0; k < 2; k++) {
val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
s->last_mv[i][0][k]);
s->last_mv[i][0][k] = val;
s->last_mv[i][1][k] = val;
s->mv[i][0][k] = val;
}
}
}
}
break;
case MT_DMV:
s->mv_type = MV_TYPE_DMV;
for (i = 0; i < 2; i++) {
if (USES_LIST(mb_type, i)) {
int dmx, dmy, mx, my, m;
const int my_shift = s->picture_structure == PICT_FRAME;
s->block_last_index[n] = i; mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
return 0; s->last_mv[i][0][0]);
} s->last_mv[i][0][0] = mx;
s->last_mv[i][1][0] = mx;
dmx = get_dmv(s);
my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
s->last_mv[i][0][1] >> my_shift);
dmy = get_dmv(s);
static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
DCTELEM *block, int n)
{
int level, i, j, run;
RLTable *rl = &ff_rl_mpeg1;
uint8_t * const scantable = s->intra_scantable.permutated;
const int qscale = s->qscale;
OPEN_READER(re, &s->gb);
i = -1;
// special case for first coefficient, no need to add second VLC table s->last_mv[i][0][1] = my << my_shift;
UPDATE_CACHE(re, &s->gb); s->last_mv[i][1][1] = my << my_shift;
if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
level = (3 * qscale) >> 1; s->mv[i][0][0] = mx;
if (GET_CACHE(re, &s->gb) & 0x40000000) s->mv[i][0][1] = my;
level = -level; s->mv[i][1][0] = mx; // not used
block[0] = level; s->mv[i][1][1] = my; // not used
i++;
SKIP_BITS(re, &s->gb, 2); if (s->picture_structure == PICT_FRAME) {
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
goto end;
}
/* now quantify & encode AC coefficients */ // m = 1 + 2 * s->top_field_first;
for (;;) { m = s->top_field_first ? 1 : 3;
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
if (level != 0) { /* top -> top pred */
i += run; s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
j = scantable[i]; s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
level = ((level * 2 + 1) * qscale) >> 1; m = 4 - m;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
SKIP_BITS(re, &s->gb, 1); s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
} else { } else {
/* escape */ mb_type |= MB_TYPE_16x16;
run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
UPDATE_CACHE(re, &s->gb);
level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
i += run; s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
j = scantable[i]; s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
if (level < 0) { if (s->picture_structure == PICT_TOP_FIELD)
level = ((-level * 2 + 1) * qscale) >> 1; s->mv[i][2][1]--;
level = -level; else
} else { s->mv[i][2][1]++;
level = ((level * 2 + 1) * qscale) >> 1; }
} }
} }
block[j] = level;
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
break; break;
UPDATE_CACHE(re, &s->gb); default:
av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
} }
end:
LAST_SKIP_BITS(re, &s->gb, 2);
CLOSE_READER(re, &s->gb);
s->block_last_index[n] = i;
return 0;
}
static inline int mpeg2_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n) s->mb_intra = 0;
{ if (HAS_CBP(mb_type)) {
int level, dc, diff, i, j, run; s->dsp.clear_blocks(s->block[0]);
int component;
RLTable *rl;
uint8_t * const scantable = s->intra_scantable.permutated;
const uint16_t *quant_matrix;
const int qscale = s->qscale;
int mismatch;
/* DC coefficient */ cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
if (n < 4) { if (mb_block_count > 6) {
quant_matrix = s->intra_matrix; cbp <<= mb_block_count - 6;
component = 0; cbp |= get_bits(&s->gb, mb_block_count - 6);
} else { s->dsp.clear_blocks(s->block[6]);
quant_matrix = s->chroma_intra_matrix;
component = (n & 1) + 1;
} }
diff = decode_dc(&s->gb, component); if (cbp <= 0) {
if (diff >= 0xffff) av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
return -1; return -1;
dc = s->last_dc[component]; }
dc += diff;
s->last_dc[component] = dc;
block[0] = dc << (3 - s->intra_dc_precision);
av_dlog(s->avctx, "dc=%d\n", block[0]);
mismatch = block[0] ^ 1;
i = 0;
if (s->intra_vlc_format)
rl = &ff_rl_mpeg2;
else
rl = &ff_rl_mpeg1;
{ //if 1, we memcpy blocks in xvmcvideo
OPEN_READER(re, &s->gb); if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
/* now quantify & encode AC coefficients */ ff_xvmc_pack_pblocks(s, cbp);
for (;;) { if (s->swap_uv) {
UPDATE_CACHE(re, &s->gb); exchange_uv(s);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); }
}
if (level == 127) { if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
break; if (s->flags2 & CODEC_FLAG2_FAST) {
} else if (level != 0) { for (i = 0; i < 6; i++) {
i += run; if (cbp & 32) {
j = scantable[i]; mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
level = (level * qscale * quant_matrix[j]) >> 4;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
LAST_SKIP_BITS(re, &s->gb, 1);
} else {
/* escape */
run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
UPDATE_CACHE(re, &s->gb);
level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
i += run;
j = scantable[i];
if (level < 0) {
level = (-level * qscale * quant_matrix[j]) >> 4;
level = -level;
} else { } else {
level = (level * qscale * quant_matrix[j]) >> 4; s->block_last_index[i] = -1;
} }
cbp += cbp;
} }
if (i > 63) { } else {
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); cbp <<= 12-mb_block_count;
for (i = 0; i < mb_block_count; i++) {
if (cbp & (1 << 11)) {
if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
return -1; return -1;
} else {
s->block_last_index[i] = -1;
} }
cbp += cbp;
mismatch ^= level;
block[j] = level;
} }
CLOSE_READER(re, &s->gb);
} }
block[63] ^= mismatch & 1;
s->block_last_index[n] = i;
return 0;
}
static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
{
int level, dc, diff, j, run;
int component;
RLTable *rl;
uint8_t * scantable = s->intra_scantable.permutated;
const uint16_t *quant_matrix;
const int qscale = s->qscale;
/* DC coefficient */
if (n < 4) {
quant_matrix = s->intra_matrix;
component = 0;
} else { } else {
quant_matrix = s->chroma_intra_matrix; if (s->flags2 & CODEC_FLAG2_FAST) {
component = (n & 1) + 1; for (i = 0; i < 6; i++) {
if (cbp & 32) {
mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
} else {
s->block_last_index[i] = -1;
}
cbp += cbp;
} }
diff = decode_dc(&s->gb, component);
if (diff >= 0xffff)
return -1;
dc = s->last_dc[component];
dc += diff;
s->last_dc[component] = dc;
block[0] = dc << (3 - s->intra_dc_precision);
if (s->intra_vlc_format)
rl = &ff_rl_mpeg2;
else
rl = &ff_rl_mpeg1;
{
OPEN_READER(re, &s->gb);
/* now quantify & encode AC coefficients */
for (;;) {
UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
if (level == 127) {
break;
} else if (level != 0) {
scantable += run;
j = *scantable;
level = (level * qscale * quant_matrix[j]) >> 4;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
LAST_SKIP_BITS(re, &s->gb, 1);
} else { } else {
/* escape */ for (i = 0; i < 6; i++) {
run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); if (cbp & 32) {
UPDATE_CACHE(re, &s->gb); if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); return -1;
scantable += run;
j = *scantable;
if (level < 0) {
level = (-level * qscale * quant_matrix[j]) >> 4;
level = -level;
} else { } else {
level = (level * qscale * quant_matrix[j]) >> 4; s->block_last_index[i] = -1;
} }
cbp += cbp;
} }
block[j] = level;
} }
CLOSE_READER(re, &s->gb); }
} else {
for (i = 0; i < 12; i++)
s->block_last_index[i] = -1;
}
} }
s->block_last_index[n] = scantable - s->intra_scantable.permutated; s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
return 0; return 0;
} }
...@@ -1193,6 +1186,11 @@ static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm, ...@@ -1193,6 +1186,11 @@ static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
} }
} }
static const enum PixelFormat pixfmt_xvmc_mpg2_420[] = {
PIX_FMT_XVMC_MPEG2_IDCT,
PIX_FMT_XVMC_MPEG2_MC,
PIX_FMT_NONE };
static enum PixelFormat mpeg_get_pixelformat(AVCodecContext *avctx) static enum PixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
{ {
Mpeg1Context *s1 = avctx->priv_data; Mpeg1Context *s1 = avctx->priv_data;
...@@ -1573,15 +1571,6 @@ static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1) ...@@ -1573,15 +1571,6 @@ static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame); av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
} }
static void exchange_uv(MpegEncContext *s)
{
DCTELEM (*tmp)[64];
tmp = s->pblocks[4];
s->pblocks[4] = s->pblocks[5];
s->pblocks[5] = tmp;
}
static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size) static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
{ {
AVCodecContext *avctx = s->avctx; AVCodecContext *avctx = s->avctx;
......
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