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* XVID MPEG-4 VIDEO CODEC |
* XVID MPEG-4 VIDEO CODEC |
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* - Decoder main module - |
* - Decoder main module - |
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* |
* |
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* This program is an implementation of a part of one or more MPEG-4 |
* Copyright(C) 2002 MinChen <chenm001@163.com> |
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* Video tools as specified in ISO/IEC 14496-2 standard. Those intending |
* 2002 Peter Ross <pross@xvid.org> |
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* to use this software module in hardware or software products are |
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* advised that its use may infringe existing patents or copyrights, and |
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* any such use would be at such party's own risk. The original |
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* developer of this software module and his/her company, and subsequent |
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* editors and their companies, will have no liability for use of this |
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* software or modifications or derivatives thereof. |
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* |
* |
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* This program is free software; you can redistribute it and/or modify |
* This file is part of XviD, a free MPEG-4 video encoder/decoder |
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* it under the terms of the GNU General Public License as published by |
* |
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* XviD is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
* (at your option) any later version. |
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* |
* |
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* along with this program; if not, write to the Free Software |
* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
* |
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*************************************************************************/ |
* Under section 8 of the GNU General Public License, the copyright |
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* holders of XVID explicitly forbid distribution in the following |
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/************************************************************************** |
* countries: |
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* |
* |
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* History: |
* - Japan |
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* - United States of America |
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* |
* |
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* 15.07.2002 fix a bug in B-frame decode at DIRECT mode |
* Linking XviD statically or dynamically with other modules is making a |
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* MinChen <chenm001@163.com> |
* combined work based on XviD. Thus, the terms and conditions of the |
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* 10.07.2002 added BFRAMES_DEC_DEBUG support |
* GNU General Public License cover the whole combination. |
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* Fix a little bug for low_delay flage |
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* MinChen <chenm001@163.com> |
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* 28.06.2002 added basic resync support to iframe/pframe_decode() |
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* 22.06.2002 added primative N_VOP support |
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* #define BFRAMES_DEC now enables Minchen's bframe decoder |
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* 08.05.2002 add low_delay support for B_VOP decode |
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* MinChen <chenm001@163.com> |
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* 05.05.2002 fix some B-frame decode problem |
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* 02.05.2002 add B-frame decode support(have some problem); |
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* MinChen <chenm001@163.com> |
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* 22.04.2002 add some B-frame decode support; chenm001 <chenm001@163.com> |
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* 29.03.2002 interlacing fix - compensated block wasn't being used when |
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* reconstructing blocks, thus artifacts |
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* interlacing speedup - used transfers to re-interlace |
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* interlaced decoding should be as fast as progressive now |
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* 26.03.2002 interlacing support - moved transfers outside decode loop |
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* 26.12.2001 decoder_mbinter: dequant/idct moved within if(coded) block |
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* 22.12.2001 lock based interpolation |
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* 01.12.2001 inital version; (c)2001 peter ross <pross@xvid.org> |
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* |
* |
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* $Id: decoder.c,v 1.38 2002-09-21 03:07:56 suxen_drol Exp $ |
* As a special exception, the copyright holders of XviD give you |
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* permission to link XviD with independent modules that communicate with |
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* XviD solely through the VFW1.1 and DShow interfaces, regardless of the |
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* license terms of these independent modules, and to copy and distribute |
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* the resulting combined work under terms of your choice, provided that |
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* every copy of the combined work is accompanied by a complete copy of |
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* the source code of XviD (the version of XviD used to produce the |
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* combined work), being distributed under the terms of the GNU General |
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* Public License plus this exception. An independent module is a module |
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* which is not derived from or based on XviD. |
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* |
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* Note that people who make modified versions of XviD are not obligated |
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* to grant this special exception for their modified versions; it is |
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* their choice whether to do so. The GNU General Public License gives |
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* permission to release a modified version without this exception; this |
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* exception also makes it possible to release a modified version which |
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* carries forward this exception. |
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* |
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* $Id: decoder.c,v 1.46 2003-02-11 21:56:31 edgomez Exp $ |
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* |
* |
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*************************************************************************/ |
*************************************************************************/ |
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xvid_free(dec); |
xvid_free(dec); |
117 |
return XVID_ERR_MEMORY; |
return XVID_ERR_MEMORY; |
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} |
} |
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// add by chenm001 <chenm001@163.com> |
/* add by chenm001 <chenm001@163.com> */ |
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// for support B-frame to reference last 2 frame |
/* for support B-frame to reference last 2 frame */ |
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if (image_create(&dec->refn[1], dec->edged_width, dec->edged_height)) { |
if (image_create(&dec->refn[1], dec->edged_width, dec->edged_height)) { |
122 |
image_destroy(&dec->cur, dec->edged_width, dec->edged_height); |
image_destroy(&dec->cur, dec->edged_width, dec->edged_height); |
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image_destroy(&dec->refn[0], dec->edged_width, dec->edged_height); |
image_destroy(&dec->refn[0], dec->edged_width, dec->edged_height); |
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memset(dec->mbs, 0, sizeof(MACROBLOCK) * dec->mb_width * dec->mb_height); |
memset(dec->mbs, 0, sizeof(MACROBLOCK) * dec->mb_width * dec->mb_height); |
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// add by chenm001 <chenm001@163.com> |
/* add by chenm001 <chenm001@163.com> */ |
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// for skip MB flag |
/* for skip MB flag */ |
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dec->last_mbs = |
dec->last_mbs = |
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xvid_malloc(sizeof(MACROBLOCK) * dec->mb_width * dec->mb_height, |
xvid_malloc(sizeof(MACROBLOCK) * dec->mb_width * dec->mb_height, |
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CACHE_LINE); |
CACHE_LINE); |
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init_timer(); |
init_timer(); |
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// add by chenm001 <chenm001@163.com> |
/* add by chenm001 <chenm001@163.com> */ |
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// for support B-frame to save reference frame's time |
/* for support B-frame to save reference frame's time */ |
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dec->frames = -1; |
dec->frames = -1; |
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dec->time = dec->time_base = dec->last_time_base = 0; |
dec->time = dec->time_base = dec->last_time_base = 0; |
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200 |
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// decode an intra macroblock |
/* decode an intra macroblock */ |
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void |
void |
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decoder_mbintra(DECODER * dec, |
decoder_mbintra(DECODER * dec, |
227 |
pU_Cur = dec->cur.u + (y_pos << 3) * stride2 + (x_pos << 3); |
pU_Cur = dec->cur.u + (y_pos << 3) * stride2 + (x_pos << 3); |
228 |
pV_Cur = dec->cur.v + (y_pos << 3) * stride2 + (x_pos << 3); |
pV_Cur = dec->cur.v + (y_pos << 3) * stride2 + (x_pos << 3); |
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memset(block, 0, 6 * 64 * sizeof(int16_t)); // clear |
memset(block, 0, 6 * 64 * sizeof(int16_t)); /* clear */ |
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for (i = 0; i < 6; i++) { |
for (i = 0; i < 6; i++) { |
233 |
uint32_t iDcScaler = get_dc_scaler(iQuant, i < 4); |
uint32_t iDcScaler = get_dc_scaler(iQuant, i < 4); |
250 |
dc_dif = dc_size ? get_dc_dif(bs, dc_size) : 0; |
dc_dif = dc_size ? get_dc_dif(bs, dc_size) : 0; |
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if (dc_size > 8) { |
if (dc_size > 8) { |
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BitstreamSkip(bs, 1); // marker |
BitstreamSkip(bs, 1); /* marker */ |
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} |
} |
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block[i * 64 + 0] = dc_dif; |
block[i * 64 + 0] = dc_dif; |
262 |
} |
} |
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start_timer(); |
start_timer(); |
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if (cbp & (1 << (5 - i))) // coded |
if (cbp & (1 << (5 - i))) /* coded */ |
266 |
{ |
{ |
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get_intra_block(bs, &block[i * 64], pMB->acpred_directions[i], |
get_intra_block(bs, &block[i * 64], pMB->acpred_directions[i], |
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start_coeff); |
start_coeff); |
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{ 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2 }; |
{ 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2 }; |
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// decode an inter macroblock |
/* decode an inter macroblock */ |
315 |
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void |
void |
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decoder_mbinter(DECODER * dec, |
decoder_mbinter(DECODER * dec, |
344 |
uv_dx = pMB->mvs[0].x; |
uv_dx = pMB->mvs[0].x; |
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uv_dy = pMB->mvs[0].y; |
uv_dy = pMB->mvs[0].y; |
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if (dec->quarterpel) |
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{ |
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uv_dx = (uv_dx >> 1) | (uv_dx & 1); |
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uv_dy = (uv_dy >> 1) | (uv_dy & 1); |
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} |
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uv_dx = (uv_dx & 3) ? (uv_dx >> 1) | 1 : uv_dx / 2; |
uv_dx = (uv_dx & 3) ? (uv_dx >> 1) | 1 : uv_dx / 2; |
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uv_dy = (uv_dy & 3) ? (uv_dy >> 1) | 1 : uv_dy / 2; |
uv_dy = (uv_dy & 3) ? (uv_dy >> 1) | 1 : uv_dy / 2; |
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} else { |
} else { |
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int sum; |
int sum; |
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sum = pMB->mvs[0].x + pMB->mvs[1].x + pMB->mvs[2].x + pMB->mvs[3].x; |
sum = pMB->mvs[0].x + pMB->mvs[1].x + pMB->mvs[2].x + pMB->mvs[3].x; |
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if (dec->quarterpel) |
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{ |
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sum /= 2; |
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} |
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uv_dx = (sum == 0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + (ABS(sum) / 16) * 2)); |
uv_dx = (sum == 0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + (ABS(sum) / 16) * 2)); |
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sum = pMB->mvs[0].y + pMB->mvs[1].y + pMB->mvs[2].y + pMB->mvs[3].y; |
sum = pMB->mvs[0].y + pMB->mvs[1].y + pMB->mvs[2].y + pMB->mvs[3].y; |
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if (dec->quarterpel) |
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{ |
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sum /= 2; |
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} |
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uv_dy = (sum == 0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + (ABS(sum) / 16) * 2)); |
uv_dy = (sum == 0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + (ABS(sum) / 16) * 2)); |
358 |
} |
} |
359 |
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start_timer(); |
start_timer(); |
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if(dec->quarterpel) { |
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DEBUG("QUARTERPEL"); |
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interpolate8x8_quarterpel(dec->cur.y, dec->refn[0].y, 16*x_pos, 16*y_pos, |
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pMB->mvs[0].x, pMB->mvs[0].y, stride, rounding); |
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interpolate8x8_quarterpel(dec->cur.y, dec->refn[0].y, 16*x_pos + 8, 16*y_pos, |
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pMB->mvs[1].x, pMB->mvs[1].y, stride, rounding); |
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interpolate8x8_quarterpel(dec->cur.y, dec->refn[0].y, 16*x_pos, 16*y_pos + 8, |
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pMB->mvs[2].x, pMB->mvs[2].y, stride, rounding); |
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interpolate8x8_quarterpel(dec->cur.y, dec->refn[0].y, 16*x_pos + 8, 16*y_pos + 8, |
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pMB->mvs[3].x, pMB->mvs[3].y, stride, rounding); |
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} |
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else { |
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361 |
interpolate8x8_switch(dec->cur.y, dec->refn[0].y, 16*x_pos, 16*y_pos, |
interpolate8x8_switch(dec->cur.y, dec->refn[0].y, 16*x_pos, 16*y_pos, |
362 |
pMB->mvs[0].x, pMB->mvs[0].y, stride, rounding); |
pMB->mvs[0].x, pMB->mvs[0].y, stride, rounding); |
363 |
interpolate8x8_switch(dec->cur.y, dec->refn[0].y, 16*x_pos + 8, 16*y_pos, |
interpolate8x8_switch(dec->cur.y, dec->refn[0].y, 16*x_pos + 8, 16*y_pos, |
366 |
pMB->mvs[2].x, pMB->mvs[2].y, stride, rounding); |
pMB->mvs[2].x, pMB->mvs[2].y, stride, rounding); |
367 |
interpolate8x8_switch(dec->cur.y, dec->refn[0].y, 16*x_pos + 8, 16*y_pos + 8, |
interpolate8x8_switch(dec->cur.y, dec->refn[0].y, 16*x_pos + 8, 16*y_pos + 8, |
368 |
pMB->mvs[3].x, pMB->mvs[3].y, stride, rounding); |
pMB->mvs[3].x, pMB->mvs[3].y, stride, rounding); |
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} |
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interpolate8x8_switch(dec->cur.u, dec->refn[0].u, 8 * x_pos, 8 * y_pos, |
interpolate8x8_switch(dec->cur.u, dec->refn[0].u, 8 * x_pos, 8 * y_pos, |
370 |
uv_dx, uv_dy, stride2, rounding); |
uv_dx, uv_dy, stride2, rounding); |
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interpolate8x8_switch(dec->cur.v, dec->refn[0].v, 8 * x_pos, 8 * y_pos, |
interpolate8x8_switch(dec->cur.v, dec->refn[0].v, 8 * x_pos, 8 * y_pos, |
373 |
stop_comp_timer(); |
stop_comp_timer(); |
374 |
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375 |
for (i = 0; i < 6; i++) { |
for (i = 0; i < 6; i++) { |
376 |
if (cbp & (1 << (5 - i))) // coded |
if (cbp & (1 << (5 - i))) /* coded */ |
377 |
{ |
{ |
378 |
memset(&block[i * 64], 0, 64 * sizeof(int16_t)); // clear |
memset(&block[i * 64], 0, 64 * sizeof(int16_t)); /* clear */ |
379 |
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380 |
start_timer(); |
start_timer(); |
381 |
get_inter_block(bs, &block[i * 64]); |
get_inter_block(bs, &block[i * 64]); |
475 |
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476 |
if (dec->interlacing) { |
if (dec->interlacing) { |
477 |
mb->field_dct = BitstreamGetBit(bs); |
mb->field_dct = BitstreamGetBit(bs); |
478 |
DEBUG1("deci: field_dct: ", mb->field_dct); |
DPRINTF(DPRINTF_DEBUG, "deci: field_dct: %d", mb->field_dct); |
479 |
} |
} |
480 |
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481 |
decoder_mbintra(dec, mb, x, y, acpred_flag, cbp, bs, quant, |
decoder_mbintra(dec, mb, x, y, acpred_flag, cbp, bs, quant, |
551 |
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552 |
start_timer(); |
start_timer(); |
553 |
image_setedges(&dec->refn[0], dec->edged_width, dec->edged_height, |
image_setedges(&dec->refn[0], dec->edged_width, dec->edged_height, |
554 |
dec->width, dec->height, dec->interlacing); |
dec->width, dec->height); |
555 |
stop_edges_timer(); |
stop_edges_timer(); |
556 |
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557 |
bound = 0; |
bound = 0; |
561 |
for (x = 0; x < dec->mb_width; x++) { |
for (x = 0; x < dec->mb_width; x++) { |
562 |
MACROBLOCK *mb; |
MACROBLOCK *mb; |
563 |
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564 |
// skip stuffing |
/* skip stuffing */ |
565 |
while (BitstreamShowBits(bs, 10) == 1) |
while (BitstreamShowBits(bs, 10) == 1) |
566 |
BitstreamSkip(bs, 10); |
BitstreamSkip(bs, 10); |
567 |
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575 |
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576 |
DPRINTF(DPRINTF_MB, "macroblock (%i,%i) %08x", x, y, BitstreamShowBits(bs, 32)); |
DPRINTF(DPRINTF_MB, "macroblock (%i,%i) %08x", x, y, BitstreamShowBits(bs, 32)); |
577 |
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578 |
//if (!(dec->mb_skip[y*dec->mb_width + x]=BitstreamGetBit(bs))) // not_coded |
/*if (!(dec->mb_skip[y*dec->mb_width + x]=BitstreamGetBit(bs))) not_coded */ |
579 |
if (!(BitstreamGetBit(bs))) // not_coded |
if (!(BitstreamGetBit(bs))) /* not_coded */ |
580 |
{ |
{ |
581 |
uint32_t mcbpc; |
uint32_t mcbpc; |
582 |
uint32_t cbpc; |
uint32_t cbpc; |
621 |
if (dec->interlacing) { |
if (dec->interlacing) { |
622 |
if (cbp || intra) { |
if (cbp || intra) { |
623 |
mb->field_dct = BitstreamGetBit(bs); |
mb->field_dct = BitstreamGetBit(bs); |
624 |
DEBUG1("decp: field_dct: ", mb->field_dct); |
DPRINTF(DPRINTF_DEBUG, "decp: field_dct: %d", mb->field_dct); |
625 |
} |
} |
626 |
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|
627 |
if (mb->mode == MODE_INTER || mb->mode == MODE_INTER_Q) { |
if (mb->mode == MODE_INTER || mb->mode == MODE_INTER_Q) { |
628 |
mb->field_pred = BitstreamGetBit(bs); |
mb->field_pred = BitstreamGetBit(bs); |
629 |
DEBUG1("decp: field_pred: ", mb->field_pred); |
DPRINTF(DPRINTF_DEBUG, "decp: field_pred: %d", mb->field_pred); |
630 |
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|
631 |
if (mb->field_pred) { |
if (mb->field_pred) { |
632 |
mb->field_for_top = BitstreamGetBit(bs); |
mb->field_for_top = BitstreamGetBit(bs); |
633 |
DEBUG1("decp: field_for_top: ", mb->field_for_top); |
DPRINTF(DPRINTF_DEBUG, "decp: field_for_top: %d", mb->field_for_top); |
634 |
mb->field_for_bot = BitstreamGetBit(bs); |
mb->field_for_bot = BitstreamGetBit(bs); |
635 |
DEBUG1("decp: field_for_bot: ", mb->field_for_bot); |
DPRINTF(DPRINTF_DEBUG, "decp: field_for_bot: %d", mb->field_for_bot); |
636 |
} |
} |
637 |
} |
} |
638 |
} |
} |
657 |
get_motion_vector(dec, bs, x, y, 1, &mb->mvs[1], fcode, bound); |
get_motion_vector(dec, bs, x, y, 1, &mb->mvs[1], fcode, bound); |
658 |
get_motion_vector(dec, bs, x, y, 2, &mb->mvs[2], fcode, bound); |
get_motion_vector(dec, bs, x, y, 2, &mb->mvs[2], fcode, bound); |
659 |
get_motion_vector(dec, bs, x, y, 3, &mb->mvs[3], fcode, bound); |
get_motion_vector(dec, bs, x, y, 3, &mb->mvs[3], fcode, bound); |
660 |
} else // MODE_INTRA, MODE_INTRA_Q |
} else /* MODE_INTRA, MODE_INTRA_Q */ |
661 |
{ |
{ |
662 |
mb->mvs[0].x = mb->mvs[1].x = mb->mvs[2].x = mb->mvs[3].x = |
mb->mvs[0].x = mb->mvs[1].x = mb->mvs[2].x = mb->mvs[3].x = |
663 |
0; |
0; |
670 |
|
|
671 |
decoder_mbinter(dec, mb, x, y, acpred_flag, cbp, bs, quant, |
decoder_mbinter(dec, mb, x, y, acpred_flag, cbp, bs, quant, |
672 |
rounding); |
rounding); |
673 |
} else // not coded |
} else /* not coded */ |
674 |
{ |
{ |
675 |
DEBUG2("P-frame MB at (X,Y)=",x,y); |
DPRINTF(DPRINTF_DEBUG, "P-frame MB at (X,Y)=(%d,%d)", x, y); |
676 |
|
|
677 |
mb->mode = MODE_NOT_CODED; |
mb->mode = MODE_NOT_CODED; |
678 |
mb->mvs[0].x = mb->mvs[1].x = mb->mvs[2].x = mb->mvs[3].x = 0; |
mb->mvs[0].x = mb->mvs[1].x = mb->mvs[2].x = mb->mvs[3].x = 0; |
679 |
mb->mvs[0].y = mb->mvs[1].y = mb->mvs[2].y = mb->mvs[3].y = 0; |
mb->mvs[0].y = mb->mvs[1].y = mb->mvs[2].y = mb->mvs[3].y = 0; |
680 |
|
|
681 |
// copy macroblock directly from ref to cur |
/* copy macroblock directly from ref to cur */ |
682 |
|
|
683 |
start_timer(); |
start_timer(); |
684 |
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728 |
} |
} |
729 |
} |
} |
730 |
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731 |
|
/* swap two MACROBLOCK array */ |
|
// add by MinChen <chenm001@163.com> |
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// decode B-frame motion vector |
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void |
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get_b_motion_vector(DECODER * dec, |
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Bitstream * bs, |
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int x, |
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int y, |
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VECTOR * mv, |
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int fcode, |
|
|
const VECTOR pmv) |
|
|
{ |
|
|
int scale_fac = 1 << (fcode - 1); |
|
|
int high = (32 * scale_fac) - 1; |
|
|
int low = ((-32) * scale_fac); |
|
|
int range = (64 * scale_fac); |
|
|
|
|
|
int mv_x, mv_y; |
|
|
int pmv_x, pmv_y; |
|
|
|
|
|
pmv_x = pmv.x; |
|
|
pmv_y = pmv.y; |
|
|
|
|
|
mv_x = get_mv(bs, fcode); |
|
|
mv_y = get_mv(bs, fcode); |
|
|
|
|
|
mv_x += pmv_x; |
|
|
mv_y += pmv_y; |
|
|
|
|
|
if (mv_x < low) { |
|
|
mv_x += range; |
|
|
} else if (mv_x > high) { |
|
|
mv_x -= range; |
|
|
} |
|
|
|
|
|
if (mv_y < low) { |
|
|
mv_y += range; |
|
|
} else if (mv_y > high) { |
|
|
mv_y -= range; |
|
|
} |
|
|
|
|
|
mv->x = mv_x; |
|
|
mv->y = mv_y; |
|
|
} |
|
|
|
|
|
|
|
|
// add by MinChen <chenm001@163.com> |
|
|
// decode an B-frame forward & backward inter macroblock |
|
|
void |
|
|
decoder_bf_mbinter(DECODER * dec, |
|
|
const MACROBLOCK * pMB, |
|
|
const uint32_t x_pos, |
|
|
const uint32_t y_pos, |
|
|
const uint32_t cbp, |
|
|
Bitstream * bs, |
|
|
const uint32_t quant, |
|
|
const uint8_t ref) |
|
|
{ |
|
|
|
|
|
DECLARE_ALIGNED_MATRIX(block, 6, 64, int16_t, CACHE_LINE); |
|
|
DECLARE_ALIGNED_MATRIX(data, 6, 64, int16_t, CACHE_LINE); |
|
|
|
|
|
uint32_t stride = dec->edged_width; |
|
|
uint32_t stride2 = stride / 2; |
|
|
uint32_t next_block = stride * 8; |
|
|
uint32_t i; |
|
|
uint32_t iQuant = pMB->quant; |
|
|
uint8_t *pY_Cur, *pU_Cur, *pV_Cur; |
|
|
int uv_dx, uv_dy; |
|
|
|
|
|
pY_Cur = dec->cur.y + (y_pos << 4) * stride + (x_pos << 4); |
|
|
pU_Cur = dec->cur.u + (y_pos << 3) * stride2 + (x_pos << 3); |
|
|
pV_Cur = dec->cur.v + (y_pos << 3) * stride2 + (x_pos << 3); |
|
|
|
|
|
|
|
|
if (!(pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q)) { |
|
|
uv_dx = pMB->mvs[0].x; |
|
|
uv_dy = pMB->mvs[0].y; |
|
|
|
|
|
uv_dx = (uv_dx & 3) ? (uv_dx >> 1) | 1 : uv_dx / 2; |
|
|
uv_dy = (uv_dy & 3) ? (uv_dy >> 1) | 1 : uv_dy / 2; |
|
|
} else { |
|
|
int sum; |
|
|
|
|
|
sum = pMB->mvs[0].x + pMB->mvs[1].x + pMB->mvs[2].x + pMB->mvs[3].x; |
|
|
uv_dx = |
|
|
(sum == |
|
|
0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + |
|
|
(ABS(sum) / 16) * 2)); |
|
|
|
|
|
sum = pMB->mvs[0].y + pMB->mvs[1].y + pMB->mvs[2].y + pMB->mvs[3].y; |
|
|
uv_dy = |
|
|
(sum == |
|
|
0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + |
|
|
(ABS(sum) / 16) * 2)); |
|
|
} |
|
|
|
|
|
start_timer(); |
|
|
interpolate8x8_switch(dec->cur.y, dec->refn[ref].y, 16 * x_pos, 16 * y_pos, |
|
|
pMB->mvs[0].x, pMB->mvs[0].y, stride, 0); |
|
|
interpolate8x8_switch(dec->cur.y, dec->refn[ref].y, 16 * x_pos + 8, |
|
|
16 * y_pos, pMB->mvs[1].x, pMB->mvs[1].y, stride, 0); |
|
|
interpolate8x8_switch(dec->cur.y, dec->refn[ref].y, 16 * x_pos, |
|
|
16 * y_pos + 8, pMB->mvs[2].x, pMB->mvs[2].y, stride, |
|
|
0); |
|
|
interpolate8x8_switch(dec->cur.y, dec->refn[ref].y, 16 * x_pos + 8, |
|
|
16 * y_pos + 8, pMB->mvs[3].x, pMB->mvs[3].y, stride, |
|
|
0); |
|
|
interpolate8x8_switch(dec->cur.u, dec->refn[ref].u, 8 * x_pos, 8 * y_pos, |
|
|
uv_dx, uv_dy, stride2, 0); |
|
|
interpolate8x8_switch(dec->cur.v, dec->refn[ref].v, 8 * x_pos, 8 * y_pos, |
|
|
uv_dx, uv_dy, stride2, 0); |
|
|
stop_comp_timer(); |
|
|
|
|
|
for (i = 0; i < 6; i++) { |
|
|
if (cbp & (1 << (5 - i))) // coded |
|
|
{ |
|
|
memset(&block[i * 64], 0, 64 * sizeof(int16_t)); // clear |
|
|
|
|
|
start_timer(); |
|
|
get_inter_block(bs, &block[i * 64]); |
|
|
stop_coding_timer(); |
|
|
|
|
|
start_timer(); |
|
|
if (dec->quant_type == 0) { |
|
|
dequant_inter(&data[i * 64], &block[i * 64], iQuant); |
|
|
} else { |
|
|
dequant4_inter(&data[i * 64], &block[i * 64], iQuant); |
|
|
} |
|
|
stop_iquant_timer(); |
|
|
|
|
|
start_timer(); |
|
|
idct(&data[i * 64]); |
|
|
stop_idct_timer(); |
|
|
} |
|
|
} |
|
|
|
|
|
if (dec->interlacing && pMB->field_dct) { |
|
|
next_block = stride; |
|
|
stride *= 2; |
|
|
} |
|
|
|
|
|
start_timer(); |
|
|
if (cbp & 32) |
|
|
transfer_16to8add(pY_Cur, &data[0 * 64], stride); |
|
|
if (cbp & 16) |
|
|
transfer_16to8add(pY_Cur + 8, &data[1 * 64], stride); |
|
|
if (cbp & 8) |
|
|
transfer_16to8add(pY_Cur + next_block, &data[2 * 64], stride); |
|
|
if (cbp & 4) |
|
|
transfer_16to8add(pY_Cur + 8 + next_block, &data[3 * 64], stride); |
|
|
if (cbp & 2) |
|
|
transfer_16to8add(pU_Cur, &data[4 * 64], stride2); |
|
|
if (cbp & 1) |
|
|
transfer_16to8add(pV_Cur, &data[5 * 64], stride2); |
|
|
stop_transfer_timer(); |
|
|
} |
|
|
|
|
|
|
|
|
// add by MinChen <chenm001@163.com> |
|
|
// decode an B-frame direct & inter macroblock |
|
|
void |
|
|
decoder_bf_interpolate_mbinter(DECODER * dec, |
|
|
IMAGE forward, |
|
|
IMAGE backward, |
|
|
const MACROBLOCK * pMB, |
|
|
const uint32_t x_pos, |
|
|
const uint32_t y_pos, |
|
|
Bitstream * bs) |
|
|
{ |
|
|
|
|
|
DECLARE_ALIGNED_MATRIX(block, 6, 64, int16_t, CACHE_LINE); |
|
|
DECLARE_ALIGNED_MATRIX(data, 6, 64, int16_t, CACHE_LINE); |
|
|
|
|
|
uint32_t stride = dec->edged_width; |
|
|
uint32_t stride2 = stride / 2; |
|
|
uint32_t next_block = stride * 8; |
|
|
uint32_t iQuant = pMB->quant; |
|
|
int uv_dx, uv_dy; |
|
|
int b_uv_dx, b_uv_dy; |
|
|
uint32_t i; |
|
|
uint8_t *pY_Cur, *pU_Cur, *pV_Cur; |
|
|
const uint32_t cbp = pMB->cbp; |
|
|
|
|
|
pY_Cur = dec->cur.y + (y_pos << 4) * stride + (x_pos << 4); |
|
|
pU_Cur = dec->cur.u + (y_pos << 3) * stride2 + (x_pos << 3); |
|
|
pV_Cur = dec->cur.v + (y_pos << 3) * stride2 + (x_pos << 3); |
|
|
|
|
|
|
|
|
if ((pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q)) { |
|
|
uv_dx = pMB->mvs[0].x; |
|
|
uv_dy = pMB->mvs[0].y; |
|
|
|
|
|
uv_dx = (uv_dx & 3) ? (uv_dx >> 1) | 1 : uv_dx / 2; |
|
|
uv_dy = (uv_dy & 3) ? (uv_dy >> 1) | 1 : uv_dy / 2; |
|
|
|
|
|
b_uv_dx = pMB->b_mvs[0].x; |
|
|
b_uv_dy = pMB->b_mvs[0].y; |
|
|
|
|
|
b_uv_dx = (uv_dx & 3) ? (uv_dx >> 1) | 1 : uv_dx / 2; |
|
|
b_uv_dy = (uv_dy & 3) ? (uv_dy >> 1) | 1 : uv_dy / 2; |
|
|
} else { |
|
|
int sum; |
|
|
|
|
|
sum = pMB->mvs[0].x + pMB->mvs[1].x + pMB->mvs[2].x + pMB->mvs[3].x; |
|
|
uv_dx = |
|
|
(sum == |
|
|
0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + |
|
|
(ABS(sum) / 16) * 2)); |
|
|
|
|
|
sum = pMB->mvs[0].y + pMB->mvs[1].y + pMB->mvs[2].y + pMB->mvs[3].y; |
|
|
uv_dy = |
|
|
(sum == |
|
|
0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + |
|
|
(ABS(sum) / 16) * 2)); |
|
|
|
|
|
sum = |
|
|
pMB->b_mvs[0].x + pMB->b_mvs[1].x + pMB->b_mvs[2].x + |
|
|
pMB->b_mvs[3].x; |
|
|
b_uv_dx = |
|
|
(sum == |
|
|
0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + |
|
|
(ABS(sum) / 16) * 2)); |
|
|
|
|
|
sum = |
|
|
pMB->b_mvs[0].y + pMB->b_mvs[1].y + pMB->b_mvs[2].y + |
|
|
pMB->b_mvs[3].y; |
|
|
b_uv_dy = |
|
|
(sum == |
|
|
0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + |
|
|
(ABS(sum) / 16) * 2)); |
|
|
} |
|
|
|
|
|
|
|
|
start_timer(); |
|
|
interpolate8x8_switch(dec->cur.y, forward.y, 16 * x_pos, 16 * y_pos, |
|
|
pMB->mvs[0].x, pMB->mvs[0].y, stride, 0); |
|
|
interpolate8x8_switch(dec->cur.y, forward.y, 16 * x_pos + 8, 16 * y_pos, |
|
|
pMB->mvs[1].x, pMB->mvs[1].y, stride, 0); |
|
|
interpolate8x8_switch(dec->cur.y, forward.y, 16 * x_pos, 16 * y_pos + 8, |
|
|
pMB->mvs[2].x, pMB->mvs[2].y, stride, 0); |
|
|
interpolate8x8_switch(dec->cur.y, forward.y, 16 * x_pos + 8, |
|
|
16 * y_pos + 8, pMB->mvs[3].x, pMB->mvs[3].y, stride, |
|
|
0); |
|
|
interpolate8x8_switch(dec->cur.u, forward.u, 8 * x_pos, 8 * y_pos, uv_dx, |
|
|
uv_dy, stride2, 0); |
|
|
interpolate8x8_switch(dec->cur.v, forward.v, 8 * x_pos, 8 * y_pos, uv_dx, |
|
|
uv_dy, stride2, 0); |
|
|
|
|
|
|
|
|
interpolate8x8_switch(dec->refn[2].y, backward.y, 16 * x_pos, 16 * y_pos, |
|
|
pMB->b_mvs[0].x, pMB->b_mvs[0].y, stride, 0); |
|
|
interpolate8x8_switch(dec->refn[2].y, backward.y, 16 * x_pos + 8, |
|
|
16 * y_pos, pMB->b_mvs[1].x, pMB->b_mvs[1].y, stride, |
|
|
0); |
|
|
interpolate8x8_switch(dec->refn[2].y, backward.y, 16 * x_pos, |
|
|
16 * y_pos + 8, pMB->b_mvs[2].x, pMB->b_mvs[2].y, |
|
|
stride, 0); |
|
|
interpolate8x8_switch(dec->refn[2].y, backward.y, 16 * x_pos + 8, |
|
|
16 * y_pos + 8, pMB->b_mvs[3].x, pMB->b_mvs[3].y, |
|
|
stride, 0); |
|
|
interpolate8x8_switch(dec->refn[2].u, backward.u, 8 * x_pos, 8 * y_pos, |
|
|
b_uv_dx, b_uv_dy, stride2, 0); |
|
|
interpolate8x8_switch(dec->refn[2].v, backward.v, 8 * x_pos, 8 * y_pos, |
|
|
b_uv_dx, b_uv_dy, stride2, 0); |
|
|
|
|
|
interpolate8x8_c(dec->cur.y, dec->refn[2].y, 16 * x_pos, 16 * y_pos, |
|
|
stride); |
|
|
interpolate8x8_c(dec->cur.y, dec->refn[2].y, 16 * x_pos + 8, 16 * y_pos, |
|
|
stride); |
|
|
interpolate8x8_c(dec->cur.y, dec->refn[2].y, 16 * x_pos, 16 * y_pos + 8, |
|
|
stride); |
|
|
interpolate8x8_c(dec->cur.y, dec->refn[2].y, 16 * x_pos + 8, |
|
|
16 * y_pos + 8, stride); |
|
|
interpolate8x8_c(dec->cur.u, dec->refn[2].u, 8 * x_pos, 8 * y_pos, |
|
|
stride2); |
|
|
interpolate8x8_c(dec->cur.v, dec->refn[2].v, 8 * x_pos, 8 * y_pos, |
|
|
stride2); |
|
|
stop_comp_timer(); |
|
|
|
|
|
for (i = 0; i < 6; i++) { |
|
|
if (cbp & (1 << (5 - i))) // coded |
|
|
{ |
|
|
memset(&block[i * 64], 0, 64 * sizeof(int16_t)); // clear |
|
|
|
|
|
start_timer(); |
|
|
get_inter_block(bs, &block[i * 64]); |
|
|
stop_coding_timer(); |
|
|
|
|
|
start_timer(); |
|
|
if (dec->quant_type == 0) { |
|
|
dequant_inter(&data[i * 64], &block[i * 64], iQuant); |
|
|
} else { |
|
|
dequant4_inter(&data[i * 64], &block[i * 64], iQuant); |
|
|
} |
|
|
stop_iquant_timer(); |
|
|
|
|
|
start_timer(); |
|
|
idct(&data[i * 64]); |
|
|
stop_idct_timer(); |
|
|
} |
|
|
} |
|
|
|
|
|
if (dec->interlacing && pMB->field_dct) { |
|
|
next_block = stride; |
|
|
stride *= 2; |
|
|
} |
|
|
|
|
|
start_timer(); |
|
|
if (cbp & 32) |
|
|
transfer_16to8add(pY_Cur, &data[0 * 64], stride); |
|
|
if (cbp & 16) |
|
|
transfer_16to8add(pY_Cur + 8, &data[1 * 64], stride); |
|
|
if (cbp & 8) |
|
|
transfer_16to8add(pY_Cur + next_block, &data[2 * 64], stride); |
|
|
if (cbp & 4) |
|
|
transfer_16to8add(pY_Cur + 8 + next_block, &data[3 * 64], stride); |
|
|
if (cbp & 2) |
|
|
transfer_16to8add(pU_Cur, &data[4 * 64], stride2); |
|
|
if (cbp & 1) |
|
|
transfer_16to8add(pV_Cur, &data[5 * 64], stride2); |
|
|
stop_transfer_timer(); |
|
|
} |
|
|
|
|
|
|
|
|
// add by MinChen <chenm001@163.com> |
|
|
// for decode B-frame dbquant |
|
|
int32_t __inline |
|
|
get_dbquant(Bitstream * bs) |
|
|
{ |
|
|
if (!BitstreamGetBit(bs)) // '0' |
|
|
return (0); |
|
|
else if (!BitstreamGetBit(bs)) // '10' |
|
|
return (-2); |
|
|
else |
|
|
return (2); // '11' |
|
|
} |
|
|
|
|
|
// add by MinChen <chenm001@163.com> |
|
|
// for decode B-frame mb_type |
|
|
// bit ret_value |
|
|
// 1 0 |
|
|
// 01 1 |
|
|
// 001 2 |
|
|
// 0001 3 |
|
|
int32_t __inline |
|
|
get_mbtype(Bitstream * bs) |
|
|
{ |
|
|
int32_t mb_type; |
|
|
|
|
|
for (mb_type = 0; mb_type <= 3; mb_type++) { |
|
|
if (BitstreamGetBit(bs)) |
|
|
break; |
|
|
} |
|
|
|
|
|
if (mb_type <= 3) |
|
|
return (mb_type); |
|
|
else |
|
|
return (-1); |
|
|
} |
|
|
|
|
|
void |
|
|
decoder_bframe(DECODER * dec, |
|
|
Bitstream * bs, |
|
|
int quant, |
|
|
int fcode_forward, |
|
|
int fcode_backward) |
|
|
{ |
|
|
uint32_t x, y; |
|
|
VECTOR mv; |
|
|
const VECTOR zeromv = {0,0}; |
|
|
#ifdef BFRAMES_DEC_DEBUG |
|
|
FILE *fp; |
|
|
static char first=0; |
|
|
#define BFRAME_DEBUG if (!first && fp){ \ |
|
|
fprintf(fp,"Y=%3d X=%3d MB=%2d CBP=%02X\n",y,x,mb->mb_type,mb->cbp); \ |
|
|
} |
|
|
#endif |
|
|
|
|
|
start_timer(); |
|
|
image_setedges(&dec->refn[0], dec->edged_width, dec->edged_height, |
|
|
dec->width, dec->height, dec->interlacing); |
|
|
image_setedges(&dec->refn[1], dec->edged_width, dec->edged_height, |
|
|
dec->width, dec->height, dec->interlacing); |
|
|
stop_edges_timer(); |
|
|
|
|
|
#ifdef BFRAMES_DEC_DEBUG |
|
|
if (!first){ |
|
|
fp=fopen("C:\\XVIDDBG.TXT","w"); |
|
|
} |
|
|
#endif |
|
|
|
|
|
for (y = 0; y < dec->mb_height; y++) { |
|
|
// Initialize Pred Motion Vector |
|
|
dec->p_fmv = dec->p_bmv = zeromv; |
|
|
for (x = 0; x < dec->mb_width; x++) { |
|
|
MACROBLOCK *mb = &dec->mbs[y * dec->mb_width + x]; |
|
|
MACROBLOCK *last_mb = &dec->last_mbs[y * dec->mb_width + x]; |
|
|
|
|
|
mv = |
|
|
mb->b_mvs[0] = mb->b_mvs[1] = mb->b_mvs[2] = mb->b_mvs[3] = |
|
|
mb->mvs[0] = mb->mvs[1] = mb->mvs[2] = mb->mvs[3] = zeromv; |
|
|
|
|
|
// the last P_VOP is skip macroblock ? |
|
|
if (last_mb->mode == MODE_NOT_CODED) { |
|
|
//DEBUG2("Skip MB in B-frame at (X,Y)=!",x,y); |
|
|
mb->cbp = 0; |
|
|
#ifdef BFRAMES_DEC_DEBUG |
|
|
mb->mb_type = MODE_NOT_CODED; |
|
|
BFRAME_DEBUG |
|
|
#endif |
|
|
mb->mb_type = MODE_FORWARD; |
|
|
mb->quant = last_mb->quant; |
|
|
//mb->mvs[1].x = mb->mvs[2].x = mb->mvs[3].x = mb->mvs[0].x; |
|
|
//mb->mvs[1].y = mb->mvs[2].y = mb->mvs[3].y = mb->mvs[0].y; |
|
|
|
|
|
decoder_bf_mbinter(dec, mb, x, y, mb->cbp, bs, mb->quant, 1); |
|
|
continue; |
|
|
} |
|
|
|
|
|
if (!BitstreamGetBit(bs)) { // modb=='0' |
|
|
const uint8_t modb2 = BitstreamGetBit(bs); |
|
|
|
|
|
mb->mb_type = get_mbtype(bs); |
|
|
|
|
|
if (!modb2) { // modb=='00' |
|
|
mb->cbp = BitstreamGetBits(bs, 6); |
|
|
} else { |
|
|
mb->cbp = 0; |
|
|
} |
|
|
if (mb->mb_type && mb->cbp) { |
|
|
quant += get_dbquant(bs); |
|
|
|
|
|
if (quant > 31) { |
|
|
quant = 31; |
|
|
} else if (quant < 1) { |
|
|
quant = 1; |
|
|
} |
|
|
} |
|
|
} else { |
|
|
mb->mb_type = MODE_DIRECT_NONE_MV; |
|
|
mb->cbp = 0; |
|
|
} |
|
|
|
|
|
mb->quant = quant; |
|
|
mb->mode = MODE_INTER4V; |
|
|
//DEBUG1("Switch bm_type=",mb->mb_type); |
|
|
|
|
|
#ifdef BFRAMES_DEC_DEBUG |
|
|
BFRAME_DEBUG |
|
|
#endif |
|
|
|
|
|
switch (mb->mb_type) { |
|
|
case MODE_DIRECT: |
|
|
get_b_motion_vector(dec, bs, x, y, &mv, 1, zeromv); |
|
|
|
|
|
case MODE_DIRECT_NONE_MV: |
|
|
{ |
|
|
const int64_t TRB = dec->time_pp - dec->time_bp, TRD = dec->time_pp; |
|
|
int i; |
|
|
|
|
|
for (i = 0; i < 4; i++) { |
|
|
mb->mvs[i].x = (int32_t) ((TRB * last_mb->mvs[i].x) |
|
|
/ TRD + mv.x); |
|
|
mb->b_mvs[i].x = (int32_t) ((mv.x == 0) |
|
|
? ((TRB - TRD) * last_mb->mvs[i].x) |
|
|
/ TRD |
|
|
: mb->mvs[i].x - last_mb->mvs[i].x); |
|
|
mb->mvs[i].y = (int32_t) ((TRB * last_mb->mvs[i].y) |
|
|
/ TRD + mv.y); |
|
|
mb->b_mvs[i].y = (int32_t) ((mv.y == 0) |
|
|
? ((TRB - TRD) * last_mb->mvs[i].y) |
|
|
/ TRD |
|
|
: mb->mvs[i].y - last_mb->mvs[i].y); |
|
|
} |
|
|
//DEBUG("B-frame Direct!\n"); |
|
|
} |
|
|
decoder_bf_interpolate_mbinter(dec, dec->refn[1], dec->refn[0], |
|
|
mb, x, y, bs); |
|
|
break; |
|
|
|
|
|
case MODE_INTERPOLATE: |
|
|
get_b_motion_vector(dec, bs, x, y, &mb->mvs[0], fcode_forward, |
|
|
dec->p_fmv); |
|
|
dec->p_fmv = mb->mvs[1] = mb->mvs[2] = mb->mvs[3] = mb->mvs[0]; |
|
|
|
|
|
get_b_motion_vector(dec, bs, x, y, &mb->b_mvs[0], |
|
|
fcode_backward, dec->p_bmv); |
|
|
dec->p_bmv = mb->b_mvs[1] = mb->b_mvs[2] = |
|
|
mb->b_mvs[3] = mb->b_mvs[0]; |
|
|
|
|
|
decoder_bf_interpolate_mbinter(dec, dec->refn[1], dec->refn[0], |
|
|
mb, x, y, bs); |
|
|
//DEBUG("B-frame Bidir!\n"); |
|
|
break; |
|
|
|
|
|
case MODE_BACKWARD: |
|
|
get_b_motion_vector(dec, bs, x, y, &mb->mvs[0], fcode_backward, |
|
|
dec->p_bmv); |
|
|
dec->p_bmv = mb->mvs[1] = mb->mvs[2] = mb->mvs[3] = mb->mvs[0]; |
|
|
|
|
|
mb->mode = MODE_INTER; |
|
|
decoder_bf_mbinter(dec, mb, x, y, mb->cbp, bs, quant, 0); |
|
|
//DEBUG("B-frame Backward!\n"); |
|
|
break; |
|
|
|
|
|
case MODE_FORWARD: |
|
|
get_b_motion_vector(dec, bs, x, y, &mb->mvs[0], fcode_forward, |
|
|
dec->p_fmv); |
|
|
dec->p_fmv = mb->mvs[1] = mb->mvs[2] = mb->mvs[3] = mb->mvs[0]; |
|
|
|
|
|
mb->mode = MODE_INTER; |
|
|
decoder_bf_mbinter(dec, mb, x, y, mb->cbp, bs, quant, 1); |
|
|
//DEBUG("B-frame Forward!\n"); |
|
|
break; |
|
|
|
|
|
default: |
|
|
DEBUG1("Not support B-frame mb_type =", mb->mb_type); |
|
|
} |
|
|
|
|
|
} // end of FOR |
|
|
} |
|
|
#ifdef BFRAMES_DEC_DEBUG |
|
|
if (!first){ |
|
|
first=1; |
|
|
if (fp) |
|
|
fclose(fp); |
|
|
} |
|
|
#endif |
|
|
} |
|
|
|
|
|
// swap two MACROBLOCK array |
|
732 |
void |
void |
733 |
mb_swap(MACROBLOCK ** mb1, |
mb_swap(MACROBLOCK ** mb1, |
734 |
MACROBLOCK ** mb2) |
MACROBLOCK ** mb2) |
758 |
|
|
759 |
BitstreamInit(&bs, frame->bitstream, frame->length); |
BitstreamInit(&bs, frame->bitstream, frame->length); |
760 |
|
|
761 |
// add by chenm001 <chenm001@163.com> |
/* add by chenm001 <chenm001@163.com> */ |
762 |
// for support B-frame to reference last 2 frame |
/* for support B-frame to reference last 2 frame */ |
763 |
dec->frames++; |
dec->frames++; |
764 |
vop_type = |
vop_type = |
765 |
BitstreamReadHeaders(&bs, dec, &rounding, &quant, &fcode_forward, |
BitstreamReadHeaders(&bs, dec, &rounding, &quant, &fcode_forward, |
766 |
&fcode_backward, &intra_dc_threshold); |
&fcode_backward, &intra_dc_threshold); |
767 |
|
|
768 |
dec->p_bmv.x = dec->p_bmv.y = dec->p_fmv.y = dec->p_fmv.y = 0; // init pred vector to 0 |
dec->p_bmv.x = dec->p_bmv.y = dec->p_fmv.y = dec->p_fmv.y = 0; /* init pred vector to 0 */ |
769 |
|
|
770 |
switch (vop_type) { |
switch (vop_type) { |
771 |
case P_VOP: |
case P_VOP: |
772 |
decoder_pframe(dec, &bs, rounding, quant, fcode_forward, |
decoder_pframe(dec, &bs, rounding, quant, fcode_forward, |
773 |
intra_dc_threshold); |
intra_dc_threshold); |
|
#ifdef BFRAMES_DEC |
|
|
DEBUG1("P_VOP Time=", dec->time); |
|
|
#endif |
|
774 |
break; |
break; |
775 |
|
|
776 |
case I_VOP: |
case I_VOP: |
777 |
decoder_iframe(dec, &bs, quant, intra_dc_threshold); |
decoder_iframe(dec, &bs, quant, intra_dc_threshold); |
|
#ifdef BFRAMES_DEC |
|
|
DEBUG1("I_VOP Time=", dec->time); |
|
|
#endif |
|
778 |
break; |
break; |
|
|
|
779 |
case B_VOP: |
case B_VOP: |
|
#ifdef BFRAMES_DEC |
|
|
if (dec->time_pp > dec->time_bp) { |
|
|
DEBUG1("B_VOP Time=", dec->time); |
|
|
decoder_bframe(dec, &bs, quant, fcode_forward, fcode_backward); |
|
|
} else { |
|
|
DEBUG("broken B-frame!"); |
|
|
} |
|
|
#else |
|
780 |
image_copy(&dec->cur, &dec->refn[0], dec->edged_width, dec->height); |
image_copy(&dec->cur, &dec->refn[0], dec->edged_width, dec->height); |
|
#endif |
|
781 |
break; |
break; |
782 |
|
case N_VOP: |
783 |
case N_VOP: // vop not coded |
/* when low_delay==0, N_VOP's should interpolate between the past and future frames */ |
|
// when low_delay==0, N_VOP's should interpolate between the past and future frames |
|
784 |
image_copy(&dec->cur, &dec->refn[0], dec->edged_width, dec->height); |
image_copy(&dec->cur, &dec->refn[0], dec->edged_width, dec->height); |
785 |
break; |
break; |
786 |
|
|
788 |
return XVID_ERR_FAIL; |
return XVID_ERR_FAIL; |
789 |
} |
} |
790 |
|
|
|
#ifdef BFRAMES_DEC_DEBUG |
|
|
if (frame->length != BitstreamPos(&bs) / 8){ |
|
|
DEBUG2("InLen/UseLen",frame->length, BitstreamPos(&bs) / 8); |
|
|
} |
|
|
#endif |
|
791 |
frame->length = BitstreamPos(&bs) / 8; |
frame->length = BitstreamPos(&bs) / 8; |
792 |
|
|
|
|
|
|
#ifdef BFRAMES_DEC |
|
|
// test if no B_VOP |
|
|
if (dec->low_delay || dec->frames == 0) { |
|
|
#endif |
|
793 |
image_output(&dec->cur, dec->width, dec->height, dec->edged_width, |
image_output(&dec->cur, dec->width, dec->height, dec->edged_width, |
794 |
frame->image, frame->stride, frame->colorspace); |
frame->image, frame->stride, frame->colorspace); |
795 |
|
|
|
#ifdef BFRAMES_DEC |
|
|
} else { |
|
|
if (dec->frames >= 1) { |
|
|
start_timer(); |
|
|
if ((vop_type == I_VOP || vop_type == P_VOP)) { |
|
|
image_output(&dec->refn[0], dec->width, dec->height, |
|
|
dec->edged_width, frame->image, frame->stride, |
|
|
frame->colorspace); |
|
|
} else if (vop_type == B_VOP) { |
|
|
image_output(&dec->cur, dec->width, dec->height, |
|
|
dec->edged_width, frame->image, frame->stride, |
|
|
frame->colorspace); |
|
|
} |
|
|
stop_conv_timer(); |
|
|
} |
|
|
} |
|
|
#endif |
|
|
|
|
796 |
if (vop_type == I_VOP || vop_type == P_VOP) { |
if (vop_type == I_VOP || vop_type == P_VOP) { |
797 |
image_swap(&dec->refn[0], &dec->refn[1]); |
image_swap(&dec->refn[0], &dec->refn[1]); |
798 |
image_swap(&dec->cur, &dec->refn[0]); |
image_swap(&dec->cur, &dec->refn[0]); |
799 |
|
|
800 |
// swap MACROBLOCK |
/* swap MACROBLOCK */ |
801 |
// the Divx will not set the low_delay flage some times |
/* the Divx will not set the low_delay flage some times */ |
802 |
// so follow code will wrong to not swap at that time |
/* so follow code will wrong to not swap at that time */ |
803 |
// this will broken bitstream! so I'm change it, |
/* this will broken bitstream! so I'm change it, */ |
804 |
// But that is not the best way! can anyone tell me how |
/* But that is not the best way! can anyone tell me how */ |
805 |
// to do another way? |
/* to do another way? */ |
806 |
// 18-07-2002 MinChen<chenm001@163.com> |
/* 18-07-2002 MinChen<chenm001@163.com> */ |
807 |
//if (!dec->low_delay && vop_type == P_VOP) |
/*if (!dec->low_delay && vop_type == P_VOP) */ |
808 |
if (vop_type == P_VOP) |
if (vop_type == P_VOP) |
809 |
mb_swap(&dec->mbs, &dec->last_mbs); |
mb_swap(&dec->mbs, &dec->last_mbs); |
810 |
} |
} |