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c3bf08d04cdec3d4fd5c4ea70e14b5edca2c45a7
ffmpeg/libavcodec/libxvidff.c
Diego Biurrun 3dc99a18d4 cosmetics: drop some pointless parentheses
2012-01-07 22:13:07 +01:00

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/*
* Interface to xvidcore for mpeg4 encoding
* Copyright (c) 2004 Adam Thayer <krevnik@comcast.net>
*
* This file is part of Libav.
*
* Libav 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 2.1 of the License, or (at your option) any later version.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Interface to xvidcore for MPEG-4 compliant encoding.
* @author Adam Thayer (krevnik@comcast.net)
*/
#include <xvid.h>
#include <unistd.h>
#include "avcodec.h"
#include "libavutil/cpu.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libxvid_internal.h"
#if !HAVE_MKSTEMP
#include <fcntl.h>
#endif
/**
* Buffer management macros.
*/
#define BUFFER_SIZE 1024
#define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
#define BUFFER_CAT(x) (&((x)[strlen(x)]))
/**
* Structure for the private Xvid context.
* This stores all the private context for the codec.
*/
struct xvid_context {
void *encoder_handle; /**< Handle for Xvid encoder */
int xsize; /**< Frame x size */
int ysize; /**< Frame y 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 */
};
/**
* Structure for the private first-pass plugin.
*/
struct xvid_ff_pass1 {
int version; /**< Xvid version */
struct xvid_context *context; /**< Pointer to private context */
};
/* 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);
/* Wrapper to work around the lack of mkstemp() on mingw.
* Also, tries to create file in /tmp first, if possible.
* *prefix can be a character constant; *filename will be allocated internally.
* @return file descriptor of opened file (or -1 on error)
* and opened file name in **filename. */
int ff_tempfile(const char *prefix, char **filename) {
int fd=-1;
#if !HAVE_MKSTEMP
*filename = tempnam(".", prefix);
#else
size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
*filename = av_malloc(len);
#endif
/* -----common section-----*/
if (*filename == NULL) {
av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
return -1;
}
#if !HAVE_MKSTEMP
fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
#else
snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
fd = mkstemp(*filename);
if (fd < 0) {
snprintf(*filename, len, "./%sXXXXXX", prefix);
fd = mkstemp(*filename);
}
#endif
/* -----common section-----*/
if (fd < 0) {
av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
return -1;
}
return fd; /* success */
}
#if CONFIG_LIBXVID_ENCODER
/**
* Create 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
*/
static av_cold int xvid_encode_init(AVCodecContext *avctx) {
int xerr, i;
int xvid_flags = avctx->flags;
struct xvid_context *x = avctx->priv_data;
uint16_t *intra, *inter;
int fd;
xvid_plugin_single_t single;
struct xvid_ff_pass1 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 avconv 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( avctx->trellis
)
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 avconv 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;
#if ARCH_PPC
/* Xvid's PPC support is borked, use libavcodec to detect */
#if HAVE_ALTIVEC
if (av_get_cpu_flags() & AV_CPU_FLAG_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 */
xvid_enc_create.zones = NULL;
xvid_enc_create.num_zones = 0;
xvid_enc_create.num_threads = avctx->thread_count;
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(struct xvid_ff_pass1));
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 = ff_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;
if(!avctx->codec_tag)
avctx->codec_tag = AV_RL32("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;
}
/**
* Encode 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
*/
static int xvid_encode_frame(AVCodecContext *avctx,
unsigned char *frame, int buf_size, void *data) {
int xerr, i;
char *tmp;
struct xvid_context *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 =
picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP :
picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP :
picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP :
XVID_TYPE_AUTO;
/* Pixel aspect ratio setting */
if (avctx->sample_aspect_ratio.num < 1 || avctx->sample_aspect_ratio.num > 255 ||
avctx->sample_aspect_ratio.den < 1 || avctx->sample_aspect_ratio.den > 255) {
av_log(avctx, AV_LOG_ERROR, "Invalid pixel aspect ratio %i/%i\n",
avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
return -1;
}
xvid_enc_frame.par = XVID_PAR_EXT;
xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
/* 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 = AV_PICTURE_TYPE_P;
else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
p->pict_type = AV_PICTURE_TYPE_B;
else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
p->pict_type = AV_PICTURE_TYPE_S;
else
p->pict_type = AV_PICTURE_TYPE_I;
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;
}
}
/**
* Destroy 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
*/
static av_cold int xvid_encode_close(AVCodecContext *avctx) {
struct xvid_context *x = avctx->priv_data;
xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
av_freep(&avctx->extradata);
if( x->twopassbuffer != NULL ) {
av_free(x->twopassbuffer);
av_free(x->old_twopassbuffer);
}
av_free(x->twopassfile);
av_free(x->intra_matrix);
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 = av_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 = av_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.
*/
/**
* Initialize 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) {
struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)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),
"# avconv 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;
}
/**
* Destroy 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(struct xvid_context *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;
}
/**
* Enable 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(struct xvid_context *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;
}
/**
* Capture statistic data and write 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(struct xvid_context *ref,
xvid_plg_data_t *param) {
char *log = ref->twopassbuffer;
const 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 ff_libxvid_encoder = {
.name = "libxvid",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_MPEG4,
.priv_data_size = sizeof(struct xvid_context),
.init = xvid_encode_init,
.encode = xvid_encode_frame,
.close = xvid_encode_close,
.pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
.long_name= NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
};
#endif /* CONFIG_LIBXVID_ENCODER */
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