/* * Interface to xvidcore for mpeg4 encoding * Copyright (c) 2004 Adam Thayer <krevnik@comcast.net> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file xvidmpeg4.c * Interface to xvidcore for MPEG-4 compliant encoding. * @author Adam Thayer (krevnik@comcast.net) */ #include <xvid.h> #include <unistd.h> #include "common.h" #include "avcodec.h" #include "internal.h" /** * Buffer management macros. */ #define BUFFER_SIZE 1024 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x)) #define BUFFER_CAT(x) (&((x)[strlen(x)])) /* For PPC Use */ #if HAVE_ALTIVEC==1 extern int has_altivec(void); #endif /** * Structure for the private XviD context. * This stores all the private context for the codec. */ typedef struct xvid_context { void *encoder_handle; /** Handle for XviD Encoder */ int xsize, ysize; /** Frame size */ int vop_flags; /** VOP flags for XviD Encoder */ int vol_flags; /** VOL flags for XviD Encoder */ int me_flags; /** Motion Estimation flags */ int qscale; /** Do we use constant scale? */ int quicktime_format; /** Are we in a QT-based format? */ AVFrame encoded_picture; /** Encoded frame information */ char *twopassbuffer; /** Character buffer for two-pass */ char *old_twopassbuffer; /** Old character buffer (two-pass) */ char *twopassfile; /** second pass temp file name */ unsigned char *intra_matrix; /** P-Frame Quant Matrix */ unsigned char *inter_matrix; /** I-Frame Quant Matrix */ } xvid_context_t; /** * Structure for the private first-pass plugin. */ typedef struct xvid_ff_pass1 { int version; /** XviD version */ xvid_context_t *context; /** Pointer to private context */ } xvid_ff_pass1_t; /* Prototypes - See function implementation for details */ int xvid_strip_vol_header(AVCodecContext *avctx, unsigned char *frame, unsigned int header_len, unsigned int frame_len); int xvid_ff_2pass(void *ref, int opt, void *p1, void *p2); void xvid_correct_framerate(AVCodecContext *avctx); /** * Creates the private context for the encoder. * All buffers are allocated, settings are loaded from the user, * and the encoder context created. * * @param avctx AVCodecContext pointer to context * @return Returns 0 on success, -1 on failure */ int ff_xvid_encode_init(AVCodecContext *avctx) { int xerr, i; int xvid_flags = avctx->flags; xvid_context_t *x = avctx->priv_data; uint16_t *intra, *inter; int fd; xvid_plugin_single_t single; xvid_ff_pass1_t rc2pass1; xvid_plugin_2pass2_t rc2pass2; xvid_gbl_init_t xvid_gbl_init; xvid_enc_create_t xvid_enc_create; xvid_enc_plugin_t plugins[7]; /* Bring in VOP flags from ffmpeg command-line */ x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */ if( xvid_flags & CODEC_FLAG_4MV ) x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */ if( xvid_flags & CODEC_FLAG_TRELLIS_QUANT) x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */ if( xvid_flags & CODEC_FLAG_AC_PRED ) x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */ if( xvid_flags & CODEC_FLAG_GRAY ) x->vop_flags |= XVID_VOP_GREYSCALE; /* Decide which ME quality setting to use */ x->me_flags = 0; switch( avctx->me_method ) { case ME_FULL: /* Quality 6 */ x->me_flags |= XVID_ME_EXTSEARCH16 | XVID_ME_EXTSEARCH8; case ME_EPZS: /* Quality 4 */ x->me_flags |= XVID_ME_ADVANCEDDIAMOND8 | XVID_ME_HALFPELREFINE8 | XVID_ME_CHROMA_PVOP | XVID_ME_CHROMA_BVOP; case ME_LOG: /* Quality 2 */ case ME_PHODS: case ME_X1: x->me_flags |= XVID_ME_ADVANCEDDIAMOND16 | XVID_ME_HALFPELREFINE16; case ME_ZERO: /* Quality 0 */ default: break; } /* Decide how we should decide blocks */ switch( avctx->mb_decision ) { case 2: x->vop_flags |= XVID_VOP_MODEDECISION_RD; x->me_flags |= XVID_ME_HALFPELREFINE8_RD | XVID_ME_QUARTERPELREFINE8_RD | XVID_ME_EXTSEARCH_RD | XVID_ME_CHECKPREDICTION_RD; case 1: if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) ) x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD; x->me_flags |= XVID_ME_HALFPELREFINE16_RD | XVID_ME_QUARTERPELREFINE16_RD; default: break; } /* Bring in VOL flags from ffmpeg command-line */ x->vol_flags = 0; if( xvid_flags & CODEC_FLAG_GMC ) { x->vol_flags |= XVID_VOL_GMC; x->me_flags |= XVID_ME_GME_REFINE; } if( xvid_flags & CODEC_FLAG_QPEL ) { x->vol_flags |= XVID_VOL_QUARTERPEL; x->me_flags |= XVID_ME_QUARTERPELREFINE16; if( x->vop_flags & XVID_VOP_INTER4V ) x->me_flags |= XVID_ME_QUARTERPELREFINE8; } memset(&xvid_gbl_init, 0, sizeof(xvid_gbl_init)); xvid_gbl_init.version = XVID_VERSION; xvid_gbl_init.debug = 0; #ifdef ARCH_POWERPC /* XviD's PPC support is borked, use libavcodec to detect */ #if HAVE_ALTIVEC==1 if( has_altivec() ) { xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC; } else #endif xvid_gbl_init.cpu_flags = XVID_CPU_FORCE; #else /* XviD can detect on x86 */ xvid_gbl_init.cpu_flags = 0; #endif /* Initialize */ xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL); /* Create the encoder reference */ memset(&xvid_enc_create, 0, sizeof(xvid_enc_create)); xvid_enc_create.version = XVID_VERSION; /* Store the desired frame size */ xvid_enc_create.width = x->xsize = avctx->width; xvid_enc_create.height = x->ysize = avctx->height; /* XviD can determine the proper profile to use */ /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */ /* We don't use zones or threads */ xvid_enc_create.zones = NULL; xvid_enc_create.num_zones = 0; xvid_enc_create.num_threads = 0; xvid_enc_create.plugins = plugins; xvid_enc_create.num_plugins = 0; /* Initialize Buffers */ x->twopassbuffer = NULL; x->old_twopassbuffer = NULL; x->twopassfile = NULL; if( xvid_flags & CODEC_FLAG_PASS1 ) { memset(&rc2pass1, 0, sizeof(xvid_ff_pass1_t)); rc2pass1.version = XVID_VERSION; rc2pass1.context = x; x->twopassbuffer = av_malloc(BUFFER_SIZE); x->old_twopassbuffer = av_malloc(BUFFER_SIZE); if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) { av_log(avctx, AV_LOG_ERROR, "XviD: Cannot allocate 2-pass log buffers\n"); return -1; } x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0; plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass; plugins[xvid_enc_create.num_plugins].param = &rc2pass1; xvid_enc_create.num_plugins++; } else if( xvid_flags & CODEC_FLAG_PASS2 ) { memset(&rc2pass2, 0, sizeof(xvid_plugin_2pass2_t)); rc2pass2.version = XVID_VERSION; rc2pass2.bitrate = avctx->bit_rate; fd = av_tempfile("xvidff.", &(x->twopassfile)); if( fd == -1 ) { av_log(avctx, AV_LOG_ERROR, "XviD: Cannot write 2-pass pipe\n"); return -1; } if( avctx->stats_in == NULL ) { av_log(avctx, AV_LOG_ERROR, "XviD: No 2-pass information loaded for second pass\n"); return -1; } if( strlen(avctx->stats_in) > write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) { close(fd); av_log(avctx, AV_LOG_ERROR, "XviD: Cannot write to 2-pass pipe\n"); return -1; } close(fd); rc2pass2.filename = x->twopassfile; plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2; plugins[xvid_enc_create.num_plugins].param = &rc2pass2; xvid_enc_create.num_plugins++; } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) { /* Single Pass Bitrate Control! */ memset(&single, 0, sizeof(xvid_plugin_single_t)); single.version = XVID_VERSION; single.bitrate = avctx->bit_rate; plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single; plugins[xvid_enc_create.num_plugins].param = &single; xvid_enc_create.num_plugins++; } /* Luminance Masking */ if( 0.0 != avctx->lumi_masking ) { plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking; plugins[xvid_enc_create.num_plugins].param = NULL; xvid_enc_create.num_plugins++; } /* Frame Rate and Key Frames */ xvid_correct_framerate(avctx); xvid_enc_create.fincr = avctx->time_base.num; xvid_enc_create.fbase = avctx->time_base.den; if( avctx->gop_size > 0 ) xvid_enc_create.max_key_interval = avctx->gop_size; else xvid_enc_create.max_key_interval = 240; /* XviD's best default */ /* Quants */ if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1; else x->qscale = 0; xvid_enc_create.min_quant[0] = avctx->qmin; xvid_enc_create.min_quant[1] = avctx->qmin; xvid_enc_create.min_quant[2] = avctx->qmin; xvid_enc_create.max_quant[0] = avctx->qmax; xvid_enc_create.max_quant[1] = avctx->qmax; xvid_enc_create.max_quant[2] = avctx->qmax; /* Quant Matrices */ x->intra_matrix = x->inter_matrix = NULL; if( avctx->mpeg_quant ) x->vol_flags |= XVID_VOL_MPEGQUANT; if( (avctx->intra_matrix || avctx->inter_matrix) ) { x->vol_flags |= XVID_VOL_MPEGQUANT; if( avctx->intra_matrix ) { intra = avctx->intra_matrix; x->intra_matrix = av_malloc(sizeof(unsigned char) * 64); } else intra = NULL; if( avctx->inter_matrix ) { inter = avctx->inter_matrix; x->inter_matrix = av_malloc(sizeof(unsigned char) * 64); } else inter = NULL; for( i = 0; i < 64; i++ ) { if( intra ) x->intra_matrix[i] = (unsigned char)intra[i]; if( inter ) x->inter_matrix[i] = (unsigned char)inter[i]; } } /* Misc Settings */ xvid_enc_create.frame_drop_ratio = 0; xvid_enc_create.global = 0; if( xvid_flags & CODEC_FLAG_CLOSED_GOP ) xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP; /* Determines which codec mode we are operating in */ avctx->extradata = NULL; avctx->extradata_size = 0; if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) { /* In this case, we are claiming to be MPEG4 */ x->quicktime_format = 1; avctx->codec_id = CODEC_ID_MPEG4; } else { /* We are claiming to be XviD */ x->quicktime_format = 0; avctx->codec_tag = ff_get_fourcc("xvid"); } /* Bframes */ xvid_enc_create.max_bframes = avctx->max_b_frames; xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset; xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor; if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED; /* Create encoder context */ xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL); if( xerr ) { av_log(avctx, AV_LOG_ERROR, "XviD: Could not create encoder reference\n"); return -1; } x->encoder_handle = xvid_enc_create.handle; avctx->coded_frame = &x->encoded_picture; return 0; } /** * Encodes a single frame. * * @param avctx AVCodecContext pointer to context * @param frame Pointer to encoded frame buffer * @param buf_size Size of encoded frame buffer * @param data Pointer to AVFrame of unencoded frame * @return Returns 0 on success, -1 on failure */ int ff_xvid_encode_frame(AVCodecContext *avctx, unsigned char *frame, int buf_size, void *data) { int xerr, i; char *tmp; xvid_context_t *x = avctx->priv_data; AVFrame *picture = data; AVFrame *p = &(x->encoded_picture); xvid_enc_frame_t xvid_enc_frame; xvid_enc_stats_t xvid_enc_stats; /* Start setting up the frame */ memset(&xvid_enc_frame, 0, sizeof(xvid_enc_frame)); xvid_enc_frame.version = XVID_VERSION; memset(&xvid_enc_stats, 0, sizeof(xvid_enc_stats)); xvid_enc_stats.version = XVID_VERSION; *p = *picture; /* Let XviD know where to put the frame. */ xvid_enc_frame.bitstream = frame; xvid_enc_frame.length = buf_size; /* Initialize input image fields */ if( avctx->pix_fmt != PIX_FMT_YUV420P ) { av_log(avctx, AV_LOG_ERROR, "XviD: Color spaces other than 420p not supported\n"); return -1; } xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */ for( i = 0; i < 4; i++ ) { xvid_enc_frame.input.plane[i] = picture->data[i]; xvid_enc_frame.input.stride[i] = picture->linesize[i]; } /* Encoder Flags */ xvid_enc_frame.vop_flags = x->vop_flags; xvid_enc_frame.vol_flags = x->vol_flags; xvid_enc_frame.motion = x->me_flags; xvid_enc_frame.type = XVID_TYPE_AUTO; /* Quant Setting */ if( x->qscale ) xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA; else xvid_enc_frame.quant = 0; /* Matrices */ xvid_enc_frame.quant_intra_matrix = x->intra_matrix; xvid_enc_frame.quant_inter_matrix = x->inter_matrix; /* Encode */ xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE, &xvid_enc_frame, &xvid_enc_stats); /* Two-pass log buffer swapping */ avctx->stats_out = NULL; if( x->twopassbuffer ) { tmp = x->old_twopassbuffer; x->old_twopassbuffer = x->twopassbuffer; x->twopassbuffer = tmp; x->twopassbuffer[0] = 0; if( x->old_twopassbuffer[0] != 0 ) { avctx->stats_out = x->old_twopassbuffer; } } if( 0 <= xerr ) { p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA; if( xvid_enc_stats.type == XVID_TYPE_PVOP ) p->pict_type = FF_P_TYPE; else if( xvid_enc_stats.type == XVID_TYPE_BVOP ) p->pict_type = FF_B_TYPE; else if( xvid_enc_stats.type == XVID_TYPE_SVOP ) p->pict_type = FF_S_TYPE; else p->pict_type = FF_I_TYPE; if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) { p->key_frame = 1; if( x->quicktime_format ) return xvid_strip_vol_header(avctx, frame, xvid_enc_stats.hlength, xerr); } else p->key_frame = 0; return xerr; } 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->time_base.den; fbase = avctx->time_base.num; gcd = ff_gcd(frate, fbase); if( gcd > 1 ) { frate /= gcd; fbase /= gcd; } if( frate <= 65000 && fbase <= 65000 ) { avctx->time_base.den = frate; avctx->time_base.num = 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->time_base.den = est_frate; avctx->time_base.num = 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->time_base.den = frate; avctx->time_base.num = 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 };