Originally committed as revision 3325 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Adam Thayer
21 years ago
committed by
Michael Niedermayer
parent
6cfe51d9da
commit
1ddadfa9e3
6 changed files with 799 additions and 0 deletions
@ -0,0 +1,770 @@ |
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/*
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* Interface to xvidcore for mpeg4 encoding |
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* Copyright (c) 2004 Adam Thayer <krevnik@comcast.net> |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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/**
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* @file xvidmpeg4.c |
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* Interface to xvidcore for MPEG-4 compliant encoding. |
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* @author Adam Thayer (krevnik@comcast.net) |
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*/ |
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#include <xvid.h> |
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#include <unistd.h> |
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#include "common.h" |
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#include "avcodec.h" |
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/**
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* Buffer management macros. |
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*/ |
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#define BUFFER_SIZE 1024 |
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#define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x)) |
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#define BUFFER_CAT(x) (&((x)[strlen(x)])) |
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/* For PPC Use */ |
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#if HAVE_ALTIVEC==1 |
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extern int has_altivec(void); |
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#endif |
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/**
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* Structure for the private XviD context. |
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* This stores all the private context for the codec. |
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*/ |
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typedef struct xvid_context { |
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void *encoder_handle; /** Handle for XviD Encoder */ |
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int xsize, ysize; /** Frame size */ |
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int vop_flags; /** VOP flags for XviD Encoder */ |
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int vol_flags; /** VOL flags for XviD Encoder */ |
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int me_flags; /** Motion Estimation flags */ |
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int qscale; /** Do we use constant scale? */ |
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int quicktime_format; /** Are we in a QT-based format? */ |
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AVFrame encoded_picture; /** Encoded frame information */ |
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char *twopassbuffer; /** Character buffer for two-pass */ |
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char *old_twopassbuffer; /** Old character buffer (two-pass) */ |
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char *twopassfile; /** second pass temp file name */ |
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unsigned char *intra_matrix; /** P-Frame Quant Matrix */ |
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unsigned char *inter_matrix; /** I-Frame Quant Matrix */ |
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} xvid_context_t; |
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/**
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* Structure for the private first-pass plugin. |
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*/ |
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typedef struct xvid_ff_pass1 { |
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int version; /** XviD version */ |
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xvid_context_t *context; /** Pointer to private context */ |
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} xvid_ff_pass1_t; |
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/* Prototypes - See function implementation for details */ |
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int xvid_strip_vol_header(AVCodecContext *avctx, unsigned char *frame, unsigned int header_len, unsigned int frame_len); |
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int xvid_ff_2pass(void *ref, int opt, void *p1, void *p2); |
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void xvid_correct_framerate(AVCodecContext *avctx);
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/**
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* Creates the private context for the encoder. |
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* All buffers are allocated, settings are loaded from the user, |
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* and the encoder context created. |
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* |
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* @param avctx AVCodecContext pointer to context |
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* @return Returns 0 on success, -1 on failure |
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*/
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int ff_xvid_encode_init(AVCodecContext *avctx) { |
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int xerr, i; |
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int xvid_flags = avctx->flags; |
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xvid_context_t *x = avctx->priv_data; |
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uint16_t *intra, *inter; |
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int fd; |
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xvid_plugin_single_t single; |
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xvid_ff_pass1_t rc2pass1; |
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xvid_plugin_2pass2_t rc2pass2; |
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xvid_gbl_init_t xvid_gbl_init; |
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xvid_enc_create_t xvid_enc_create; |
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xvid_enc_plugin_t plugins[7]; |
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/* Bring in VOP flags from ffmpeg command-line */ |
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x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */ |
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if( xvid_flags & CODEC_FLAG_4MV )
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x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */ |
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if( xvid_flags & CODEC_FLAG_TRELLIS_QUANT)
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x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */ |
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if( xvid_flags & CODEC_FLAG_AC_PRED )
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x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */ |
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if( xvid_flags & CODEC_FLAG_GRAY ) |
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x->vop_flags |= XVID_VOP_GREYSCALE; |
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/* Decide which ME quality setting to use */ |
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x->me_flags = 0; |
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switch( avctx->me_method ) { |
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case ME_FULL: /* Quality 6 */ |
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x->me_flags |= XVID_ME_EXTSEARCH16 |
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| XVID_ME_EXTSEARCH8; |
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case ME_EPZS: /* Quality 4 */ |
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x->me_flags |= XVID_ME_ADVANCEDDIAMOND8 |
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| XVID_ME_HALFPELREFINE8 |
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| XVID_ME_CHROMA_PVOP |
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| XVID_ME_CHROMA_BVOP; |
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case ME_LOG: /* Quality 2 */ |
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case ME_PHODS: |
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case ME_X1: |
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x->me_flags |= XVID_ME_ADVANCEDDIAMOND16 |
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| XVID_ME_HALFPELREFINE16; |
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case ME_ZERO: /* Quality 0 */ |
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default: |
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break; |
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} |
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/* Decide how we should decide blocks */ |
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switch( avctx->mb_decision ) { |
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case 2: |
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x->vop_flags |= XVID_VOP_MODEDECISION_RD; |
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x->me_flags |= XVID_ME_HALFPELREFINE8_RD |
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| XVID_ME_QUARTERPELREFINE8_RD |
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| XVID_ME_EXTSEARCH_RD |
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| XVID_ME_CHECKPREDICTION_RD;
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case 1: |
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if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) ) |
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x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD; |
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x->me_flags |= XVID_ME_HALFPELREFINE16_RD |
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| XVID_ME_QUARTERPELREFINE16_RD; |
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default: |
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break; |
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} |
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/* Bring in VOL flags from ffmpeg command-line */ |
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x->vol_flags = 0; |
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if( xvid_flags & CODEC_FLAG_GMC ) {
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x->vol_flags |= XVID_VOL_GMC;
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x->me_flags |= XVID_ME_GME_REFINE;
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} |
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if( xvid_flags & CODEC_FLAG_QPEL ) {
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x->vol_flags |= XVID_VOL_QUARTERPEL; |
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x->me_flags |= XVID_ME_QUARTERPELREFINE16; |
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if( x->vop_flags & XVID_VOP_INTER4V ) |
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x->me_flags |= XVID_ME_QUARTERPELREFINE8; |
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} |
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memset(&xvid_gbl_init, 0, sizeof(xvid_gbl_init)); |
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xvid_gbl_init.version = XVID_VERSION; |
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xvid_gbl_init.debug = 0; |
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#ifdef ARCH_POWERPC |
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/* XviD's PPC support is borked, use libavcodec to detect */ |
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#if HAVE_ALTIVEC==1 |
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if( has_altivec() ) { |
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xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC; |
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} else |
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#endif |
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xvid_gbl_init.cpu_flags = XVID_CPU_FORCE;
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#else |
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/* XviD can detect on x86 */ |
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xvid_gbl_init.cpu_flags = 0; |
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#endif |
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/* Initialize */ |
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xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL); |
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/* Create the encoder reference */ |
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memset(&xvid_enc_create, 0, sizeof(xvid_enc_create)); |
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xvid_enc_create.version = XVID_VERSION; |
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/* Store the desired frame size */ |
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xvid_enc_create.width = x->xsize = avctx->width; |
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xvid_enc_create.height = x->ysize = avctx->height; |
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/* XviD can determine the proper profile to use */ |
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/* xvid_enc_create.profile = XVID_PROFILE_S_L3; */ |
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/* We don't use zones or threads */ |
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xvid_enc_create.zones = NULL; |
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xvid_enc_create.num_zones = 0; |
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xvid_enc_create.num_threads = 0; |
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xvid_enc_create.plugins = plugins; |
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xvid_enc_create.num_plugins = 0; |
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/* Initialize Buffers */ |
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x->twopassbuffer = NULL; |
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x->old_twopassbuffer = NULL; |
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x->twopassfile = NULL; |
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if( xvid_flags & CODEC_FLAG_PASS1 ) { |
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memset(&rc2pass1, 0, sizeof(xvid_ff_pass1_t)); |
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rc2pass1.version = XVID_VERSION; |
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rc2pass1.context = x; |
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x->twopassbuffer = av_malloc(BUFFER_SIZE); |
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x->old_twopassbuffer = av_malloc(BUFFER_SIZE); |
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if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) { |
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av_log(avctx, AV_LOG_ERROR, |
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"XviD: Cannot allocate 2-pass log buffers\n"); |
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return -1; |
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} |
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x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0; |
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plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass; |
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plugins[xvid_enc_create.num_plugins].param = &rc2pass1; |
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xvid_enc_create.num_plugins++; |
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} else if( xvid_flags & CODEC_FLAG_PASS2 ) { |
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memset(&rc2pass2, 0, sizeof(xvid_plugin_2pass2_t)); |
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rc2pass2.version = XVID_VERSION; |
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rc2pass2.bitrate = avctx->bit_rate; |
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x->twopassfile = av_malloc(BUFFER_SIZE); |
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if( x->twopassfile == NULL ) { |
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av_log(avctx, AV_LOG_ERROR, |
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"XviD: Cannot allocate 2-pass buffer\n"); |
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return -1; |
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} |
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strcpy(x->twopassfile, "/tmp/xvidff.XXXXXX"); |
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fd = mkstemp(x->twopassfile); |
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if( fd == -1 ) { |
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av_log(avctx, AV_LOG_ERROR, |
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"XviD: Cannot write 2-pass pipe\n"); |
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return -1; |
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} |
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if( avctx->stats_in == NULL ) { |
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av_log(avctx, AV_LOG_ERROR, |
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"XviD: No 2-pass information loaded for second pass\n"); |
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return -1; |
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} |
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if( strlen(avctx->stats_in) >
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write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) { |
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close(fd); |
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av_log(avctx, AV_LOG_ERROR, |
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"XviD: Cannot write to 2-pass pipe\n"); |
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return -1; |
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} |
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close(fd); |
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rc2pass2.filename = x->twopassfile; |
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plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2; |
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plugins[xvid_enc_create.num_plugins].param = &rc2pass2; |
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xvid_enc_create.num_plugins++; |
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} else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) { |
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/* Single Pass Bitrate Control! */ |
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memset(&single, 0, sizeof(xvid_plugin_single_t)); |
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single.version = XVID_VERSION; |
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single.bitrate = avctx->bit_rate; |
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plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single; |
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plugins[xvid_enc_create.num_plugins].param = &single; |
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xvid_enc_create.num_plugins++; |
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} |
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/* Luminance Masking */ |
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if( 0.0 != avctx->lumi_masking ) { |
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plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking; |
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plugins[xvid_enc_create.num_plugins].param = NULL; |
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xvid_enc_create.num_plugins++; |
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} |
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/* Frame Rate and Key Frames */ |
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xvid_correct_framerate(avctx); |
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xvid_enc_create.fincr = avctx->frame_rate_base; |
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xvid_enc_create.fbase = avctx->frame_rate; |
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if( avctx->gop_size > 0 ) |
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xvid_enc_create.max_key_interval = avctx->gop_size; |
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else |
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xvid_enc_create.max_key_interval = 240; /* XviD's best default */ |
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/* Quants */ |
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if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
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else x->qscale = 0; |
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xvid_enc_create.min_quant[0] = avctx->qmin; |
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xvid_enc_create.min_quant[1] = avctx->qmin; |
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xvid_enc_create.min_quant[2] = avctx->qmin; |
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xvid_enc_create.max_quant[0] = avctx->qmax; |
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xvid_enc_create.max_quant[1] = avctx->qmax; |
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xvid_enc_create.max_quant[2] = avctx->qmax; |
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/* Quant Matrices */ |
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x->intra_matrix = x->inter_matrix = NULL; |
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if( avctx->mpeg_quant ) |
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x->vol_flags |= XVID_VOL_MPEGQUANT; |
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if( (avctx->intra_matrix || avctx->inter_matrix) ) { |
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x->vol_flags |= XVID_VOL_MPEGQUANT; |
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if( avctx->intra_matrix ) { |
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intra = avctx->intra_matrix; |
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x->intra_matrix = av_malloc(sizeof(unsigned char) * 64); |
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} else
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intra = NULL; |
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if( avctx->inter_matrix ) { |
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inter = avctx->inter_matrix; |
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x->inter_matrix = av_malloc(sizeof(unsigned char) * 64); |
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} else
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inter = NULL; |
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for( i = 0; i < 64; i++ ) { |
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if( intra ) |
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x->intra_matrix[i] = (unsigned char)intra[i]; |
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if( inter ) |
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x->inter_matrix[i] = (unsigned char)inter[i]; |
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} |
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} |
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/* Misc Settings */ |
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xvid_enc_create.frame_drop_ratio = 0; |
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xvid_enc_create.global = 0; |
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if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
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xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP; |
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/* Determines which codec mode we are operating in */ |
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avctx->extradata = NULL; |
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avctx->extradata_size = 0; |
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if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) { |
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/* In this case, we are claiming to be MPEG4 */ |
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x->quicktime_format = 1; |
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avctx->codec_id = CODEC_ID_MPEG4; |
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} else { |
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/* We are claiming to be XviD */ |
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x->quicktime_format = 0; |
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avctx->codec_tag = ff_get_fourcc("xvid"); |
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}
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/* Bframes */ |
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xvid_enc_create.max_bframes = avctx->max_b_frames; |
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xvid_enc_create.bquant_offset = avctx->b_quant_offset; |
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xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor; |
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if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED; |
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/* Create encoder context */ |
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xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL); |
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if( xerr ) { |
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av_log(avctx, AV_LOG_ERROR, "XviD: Could not create encoder reference\n"); |
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return -1; |
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} |
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x->encoder_handle = xvid_enc_create.handle; |
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avctx->coded_frame = &x->encoded_picture; |
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return 0; |
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} |
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/**
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* Encodes a single frame. |
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* |
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* @param avctx AVCodecContext pointer to context |
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* @param frame Pointer to encoded frame buffer |
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* @param buf_size Size of encoded frame buffer |
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* @param data Pointer to AVFrame of unencoded frame |
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* @return Returns 0 on success, -1 on failure |
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*/ |
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int ff_xvid_encode_frame(AVCodecContext *avctx, |
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unsigned char *frame, int buf_size, void *data) { |
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int xerr, i; |
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char *tmp; |
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xvid_context_t *x = avctx->priv_data; |
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AVFrame *picture = data; |
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AVFrame *p = &(x->encoded_picture); |
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xvid_enc_frame_t xvid_enc_frame; |
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xvid_enc_stats_t xvid_enc_stats; |
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/* Start setting up the frame */ |
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memset(&xvid_enc_frame, 0, sizeof(xvid_enc_frame)); |
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xvid_enc_frame.version = XVID_VERSION; |
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memset(&xvid_enc_stats, 0, sizeof(xvid_enc_stats)); |
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xvid_enc_stats.version = XVID_VERSION; |
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*p = *picture;
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/* Let XviD know where to put the frame. */ |
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xvid_enc_frame.bitstream = frame; |
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xvid_enc_frame.length = buf_size; |
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/* Initialize input image fields */ |
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if( avctx->pix_fmt != PIX_FMT_YUV420P ) { |
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av_log(avctx, AV_LOG_ERROR, "XviD: Color spaces other than 420p not supported\n"); |
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return -1; |
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} |
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xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */ |
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for( i = 0; i < 4; i++ ) { |
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xvid_enc_frame.input.plane[i] = picture->data[i]; |
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xvid_enc_frame.input.stride[i] = picture->linesize[i]; |
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} |
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/* Encoder Flags */ |
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xvid_enc_frame.vop_flags = x->vop_flags; |
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xvid_enc_frame.vol_flags = x->vol_flags; |
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xvid_enc_frame.motion = x->me_flags; |
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xvid_enc_frame.type = XVID_TYPE_AUTO; |
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/* Quant Setting */ |
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if( x->qscale ) xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA; |
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else xvid_enc_frame.quant = 0; |
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/* Matrices */ |
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xvid_enc_frame.quant_intra_matrix = x->intra_matrix; |
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xvid_enc_frame.quant_inter_matrix = x->inter_matrix; |
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/* Encode */ |
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xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
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&xvid_enc_frame, &xvid_enc_stats); |
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/* Two-pass log buffer swapping */ |
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avctx->stats_out = NULL; |
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if( x->twopassbuffer ) { |
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tmp = x->old_twopassbuffer; |
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x->old_twopassbuffer = x->twopassbuffer; |
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x->twopassbuffer = tmp; |
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x->twopassbuffer[0] = 0; |
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if( x->old_twopassbuffer[0] != 0 ) { |
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avctx->stats_out = x->old_twopassbuffer; |
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} |
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}
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if( 0 <= xerr ) { |
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p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA; |
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if( xvid_enc_stats.type == XVID_TYPE_PVOP ) |
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p->pict_type = FF_P_TYPE; |
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else if( xvid_enc_stats.type == XVID_TYPE_BVOP ) |
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p->pict_type = FF_B_TYPE; |
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else if( xvid_enc_stats.type == XVID_TYPE_SVOP ) |
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p->pict_type = FF_SP_TYPE; |
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else |
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p->pict_type = FF_I_TYPE; |
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if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) { |
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p->key_frame = 1; |
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if( x->quicktime_format ) |
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return xvid_strip_vol_header(avctx, frame,
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xvid_enc_stats.hlength, xerr); |
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} else
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p->key_frame = 0; |
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return xerr; |
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} else { |
||||
av_log(avctx, AV_LOG_ERROR, "XviD: Encoding Error Occurred: %i\n", xerr); |
||||
return -1; |
||||
} |
||||
} |
||||
|
||||
/**
|
||||
* Destroys the private context for the encoder. |
||||
* All buffers are freed, and the XviD encoder context is destroyed. |
||||
* |
||||
* @param avctx AVCodecContext pointer to context |
||||
* @return Returns 0, success guaranteed |
||||
*/ |
||||
int ff_xvid_encode_close(AVCodecContext *avctx) { |
||||
xvid_context_t *x = avctx->priv_data; |
||||
|
||||
xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL); |
||||
|
||||
if( avctx->extradata != NULL ) |
||||
av_free(avctx->extradata); |
||||
if( x->twopassbuffer != NULL ) { |
||||
av_free(x->twopassbuffer); |
||||
av_free(x->old_twopassbuffer); |
||||
} |
||||
if( x->twopassfile != NULL ) |
||||
av_free(x->twopassfile); |
||||
if( x->intra_matrix != NULL ) |
||||
av_free(x->intra_matrix); |
||||
if( x->inter_matrix != NULL ) |
||||
av_free(x->inter_matrix); |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
/**
|
||||
* Routine to create a global VO/VOL header for MP4 container. |
||||
* What we do here is extract the header from the XviD bitstream |
||||
* as it is encoded. We also strip the repeated headers from the |
||||
* bitstream when a global header is requested for MPEG-4 ISO |
||||
* compliance. |
||||
* |
||||
* @param avctx AVCodecContext pointer to context |
||||
* @param frame Pointer to encoded frame data |
||||
* @param header_len Length of header to search |
||||
* @param frame_len Length of encoded frame data |
||||
* @return Returns new length of frame data |
||||
*/ |
||||
int xvid_strip_vol_header(AVCodecContext *avctx,
|
||||
unsigned char *frame,
|
||||
unsigned int header_len, |
||||
unsigned int frame_len) { |
||||
int vo_len = 0, i; |
||||
|
||||
for( i = 0; i < header_len - 3; i++ ) { |
||||
if( frame[i] == 0x00 &&
|
||||
frame[i+1] == 0x00 && |
||||
frame[i+2] == 0x01 && |
||||
frame[i+3] == 0xB6 ) { |
||||
vo_len = i; |
||||
break; |
||||
}
|
||||
} |
||||
|
||||
if( vo_len > 0 ) { |
||||
/* We need to store the header, so extract it */ |
||||
if( avctx->extradata == NULL ) { |
||||
avctx->extradata = av_malloc(vo_len); |
||||
memcpy(avctx->extradata, frame, vo_len); |
||||
avctx->extradata_size = vo_len; |
||||
} |
||||
/* Less dangerous now, memmove properly copies the two
|
||||
chunks of overlapping data */ |
||||
memmove(frame, &(frame[vo_len]), frame_len - vo_len); |
||||
return frame_len - vo_len; |
||||
} else |
||||
return frame_len; |
||||
} |
||||
|
||||
/**
|
||||
* Routine to correct a possibly erroneous framerate being fed to us. |
||||
* XviD currently chokes on framerates where the ticks per frame is
|
||||
* extremely large. This function works to correct problems in this area |
||||
* by estimating a new framerate and taking the simpler fraction of
|
||||
* the two presented. |
||||
* |
||||
* @param avctx Context that contains the framerate to correct. |
||||
*/ |
||||
void xvid_correct_framerate(AVCodecContext *avctx) { |
||||
int frate, fbase; |
||||
int est_frate, est_fbase; |
||||
int gcd; |
||||
float est_fps, fps; |
||||
|
||||
frate = avctx->frame_rate; |
||||
fbase = avctx->frame_rate_base; |
||||
|
||||
gcd = ff_gcd(frate, fbase); |
||||
if( gcd > 1 ) { |
||||
frate /= gcd; |
||||
fbase /= gcd; |
||||
} |
||||
|
||||
if( frate <= 65000 && fbase <= 65000 ) { |
||||
avctx->frame_rate = frate; |
||||
avctx->frame_rate_base = fbase; |
||||
return; |
||||
} |
||||
|
||||
fps = (float)frate / (float)fbase; |
||||
est_fps = roundf(fps * 1000.0) / 1000.0; |
||||
|
||||
est_frate = (int)est_fps; |
||||
if( est_fps > (int)est_fps ) { |
||||
est_frate = (est_frate + 1) * 1000; |
||||
est_fbase = (int)roundf((float)est_frate / est_fps);
|
||||
} else |
||||
est_fbase = 1; |
||||
|
||||
gcd = ff_gcd(est_frate, est_fbase); |
||||
if( gcd > 1 ) { |
||||
est_frate /= gcd; |
||||
est_fbase /= gcd; |
||||
}
|
||||
|
||||
if( fbase > est_fbase ) { |
||||
avctx->frame_rate = est_frate; |
||||
avctx->frame_rate_base = est_fbase; |
||||
av_log(avctx, AV_LOG_DEBUG,
|
||||
"XviD: framerate re-estimated: %.2f, %.3f%% correction\n", |
||||
est_fps, (((est_fps - fps)/fps) * 100.0)); |
||||
} else { |
||||
avctx->frame_rate = frate; |
||||
avctx->frame_rate_base = fbase; |
||||
} |
||||
} |
||||
|
||||
/*
|
||||
* XviD 2-Pass Kludge Section |
||||
* |
||||
* XviD's default 2-pass doesn't allow us to create data as we need to, so |
||||
* this section spends time replacing the first pass plugin so we can write |
||||
* statistic information as libavcodec requests in. We have another kludge |
||||
* that allows us to pass data to the second pass in XviD without a custom |
||||
* rate-control plugin. |
||||
*/ |
||||
|
||||
/**
|
||||
* Initializes the two-pass plugin and context. |
||||
* |
||||
* @param param Input construction parameter structure |
||||
* @param handle Private context handle |
||||
* @return Returns XVID_ERR_xxxx on failure, or 0 on success. |
||||
*/ |
||||
static int xvid_ff_2pass_create(xvid_plg_create_t * param, |
||||
void ** handle) { |
||||
xvid_ff_pass1_t *x = (xvid_ff_pass1_t *)param->param; |
||||
char *log = x->context->twopassbuffer; |
||||
|
||||
/* Do a quick bounds check */ |
||||
if( log == NULL ) |
||||
return XVID_ERR_FAIL; |
||||
|
||||
/* We use snprintf() */ |
||||
/* This is because we can safely prevent a buffer overflow */ |
||||
log[0] = 0; |
||||
snprintf(log, BUFFER_REMAINING(log), |
||||
"# ffmpeg 2-pass log file, using xvid codec\n"); |
||||
snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log), |
||||
"# Do not modify. libxvidcore version: %d.%d.%d\n\n", |
||||
XVID_VERSION_MAJOR(XVID_VERSION), |
||||
XVID_VERSION_MINOR(XVID_VERSION), |
||||
XVID_VERSION_PATCH(XVID_VERSION)); |
||||
|
||||
*handle = x->context; |
||||
return 0;
|
||||
} |
||||
|
||||
/**
|
||||
* Destroys the two-pass plugin context. |
||||
* |
||||
* @param ref Context pointer for the plugin |
||||
* @param param Destrooy context |
||||
* @return Returns 0, success guaranteed |
||||
*/ |
||||
static int xvid_ff_2pass_destroy(xvid_context_t *ref,
|
||||
xvid_plg_destroy_t *param) { |
||||
/* Currently cannot think of anything to do on destruction */ |
||||
/* Still, the framework should be here for reference/use */ |
||||
if( ref->twopassbuffer != NULL ) |
||||
ref->twopassbuffer[0] = 0; |
||||
return 0; |
||||
} |
||||
|
||||
/**
|
||||
* Enables fast encode mode during the first pass. |
||||
* |
||||
* @param ref Context pointer for the plugin |
||||
* @param param Frame data |
||||
* @return Returns 0, success guaranteed |
||||
*/ |
||||
static int xvid_ff_2pass_before(xvid_context_t *ref, |
||||
xvid_plg_data_t *param) { |
||||
int motion_remove; |
||||
int motion_replacements;
|
||||
int vop_remove; |
||||
|
||||
/* Nothing to do here, result is changed too much */
|
||||
if( param->zone && param->zone->mode == XVID_ZONE_QUANT ) |
||||
return 0;
|
||||
|
||||
/* We can implement a 'turbo' first pass mode here */
|
||||
param->quant = 2;
|
||||
|
||||
/* Init values */ |
||||
motion_remove = ~XVID_ME_CHROMA_PVOP & |
||||
~XVID_ME_CHROMA_BVOP & |
||||
~XVID_ME_EXTSEARCH16 & |
||||
~XVID_ME_ADVANCEDDIAMOND16; |
||||
motion_replacements = XVID_ME_FAST_MODEINTERPOLATE | |
||||
XVID_ME_SKIP_DELTASEARCH | |
||||
XVID_ME_FASTREFINE16 | |
||||
XVID_ME_BFRAME_EARLYSTOP; |
||||
vop_remove = ~XVID_VOP_MODEDECISION_RD & |
||||
~XVID_VOP_FAST_MODEDECISION_RD & |
||||
~XVID_VOP_TRELLISQUANT & |
||||
~XVID_VOP_INTER4V & |
||||
~XVID_VOP_HQACPRED; |
||||
|
||||
param->vol_flags &= ~XVID_VOL_GMC; |
||||
param->vop_flags &= vop_remove; |
||||
param->motion_flags &= motion_remove; |
||||
param->motion_flags |= motion_replacements;
|
||||
|
||||
return 0;
|
||||
} |
||||
|
||||
/**
|
||||
* Captures statistic data and writes it during first pass. |
||||
* |
||||
* @param ref Context pointer for the plugin |
||||
* @param param Statistic data |
||||
* @return Returns XVID_ERR_xxxx on failure, or 0 on success |
||||
*/ |
||||
static int xvid_ff_2pass_after(xvid_context_t *ref, |
||||
xvid_plg_data_t *param) { |
||||
char *log = ref->twopassbuffer; |
||||
char *frame_types = " ipbs"; |
||||
char frame_type; |
||||
|
||||
/* Quick bounds check */ |
||||
if( log == NULL ) |
||||
return XVID_ERR_FAIL; |
||||
|
||||
/* Convert the type given to us into a character */ |
||||
if( param->type < 5 && param->type > 0 ) { |
||||
frame_type = frame_types[param->type]; |
||||
} else { |
||||
return XVID_ERR_FAIL; |
||||
} |
||||
|
||||
snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log), |
||||
"%c %d %d %d %d %d %d\n", |
||||
frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
|
||||
param->stats.ublks, param->stats.length, param->stats.hlength); |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
/**
|
||||
* Dispatch function for our custom plugin. |
||||
* This handles the dispatch for the XviD plugin. It passes data |
||||
* on to other functions for actual processing. |
||||
* |
||||
* @param ref Context pointer for the plugin |
||||
* @param cmd The task given for us to complete |
||||
* @param p1 First parameter (varies) |
||||
* @param p2 Second parameter (varies) |
||||
* @return Returns XVID_ERR_xxxx on failure, or 0 on success |
||||
*/ |
||||
int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2) { |
||||
switch( cmd ) { |
||||
case XVID_PLG_INFO: |
||||
case XVID_PLG_FRAME: |
||||
return 0; |
||||
|
||||
case XVID_PLG_BEFORE: |
||||
return xvid_ff_2pass_before(ref, p1); |
||||
|
||||
case XVID_PLG_CREATE: |
||||
return xvid_ff_2pass_create(p1, p2); |
||||
|
||||
case XVID_PLG_AFTER: |
||||
return xvid_ff_2pass_after(ref, p1); |
||||
|
||||
case XVID_PLG_DESTROY: |
||||
return xvid_ff_2pass_destroy(ref, p1); |
||||
|
||||
default: |
||||
return XVID_ERR_FAIL; |
||||
} |
||||
} |
||||
|
||||
/**
|
||||
* XviD codec definition for libavcodec. |
||||
*/ |
||||
AVCodec xvid_encoder = { |
||||
"xvid", |
||||
CODEC_TYPE_VIDEO, |
||||
CODEC_ID_XVID, |
||||
sizeof(xvid_context_t), |
||||
ff_xvid_encode_init, |
||||
ff_xvid_encode_frame, |
||||
ff_xvid_encode_close |
||||
}; |
||||
Loading…
Reference in new issue