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FFmpeg/libavcodec/libxvid.c

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/*
* Interface to xvidcore for MPEG-4 encoding
* Copyright (c) 2004 Adam Thayer <krevnik@comcast.net>
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; 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 <stdio.h>
#include <string.h>
#include <xvid.h>
#include "libavutil/avassert.h"
#include "libavutil/cpu.h"
#include "libavutil/file.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "encode.h"
#include "internal.h"
#include "mpegutils.h"
#include "packet_internal.h"
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_IO_H
#include <io.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 {
AVClass *class;
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? */
char *twopassbuffer; /**< Character buffer for two-pass */
char *old_twopassbuffer; /**< Old character buffer (two-pass) */
char *twopassfile; /**< second pass temp file name */
int twopassfd;
unsigned char *intra_matrix; /**< P-Frame Quant Matrix */
unsigned char *inter_matrix; /**< I-Frame Quant Matrix */
int lumi_aq; /**< Lumi masking as an aq method */
int variance_aq; /**< Variance adaptive quantization */
int ssim; /**< SSIM information display mode */
int ssim_acc; /**< SSIM accuracy. 0: accurate. 4: fast. */
int gmc;
int me_quality; /**< Motion estimation quality. 0: fast 6: best. */
int mpeg_quant; /**< Quantization type. 0: H.263, 1: MPEG */
};
/**
* Structure for the private first-pass plugin.
*/
struct xvid_ff_pass1 {
int version; /**< Xvid version */
struct xvid_context *context; /**< Pointer to private context */
};
static int xvid_encode_close(AVCodecContext *avctx);
static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *picture, int *got_packet);
/*
* 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)
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;
}
/**
* Destroy the two-pass plugin context.
*
* @param ref Context pointer for the plugin
* @param param Destroy 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)
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)
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
*/
static 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;
}
}
/**
* 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
*/
static int xvid_strip_vol_header(AVCodecContext *avctx, AVPacket *pkt,
unsigned int header_len,
unsigned int frame_len)
{
int vo_len = 0, i;
for (i = 0; i < header_len - 3; i++) {
if (pkt->data[i] == 0x00 &&
pkt->data[i + 1] == 0x00 &&
pkt->data[i + 2] == 0x01 &&
pkt->data[i + 3] == 0xB6) {
vo_len = i;
break;
}
}
if (vo_len > 0) {
/* We need to store the header, so extract it */
if (!avctx->extradata) {
avctx->extradata = av_malloc(vo_len);
if (!avctx->extradata)
return AVERROR(ENOMEM);
memcpy(avctx->extradata, pkt->data, vo_len);
avctx->extradata_size = vo_len;
}
/* Less dangerous now, memmove properly copies the two
* chunks of overlapping data */
memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
pkt->size = frame_len - vo_len;
}
return 0;
}
/**
* 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.
*/
static 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;
}
}
static av_cold int xvid_encode_init(AVCodecContext *avctx)
{
int xerr, i, ret = -1;
int xvid_flags = avctx->flags;
struct xvid_context *x = avctx->priv_data;
uint16_t *intra, *inter;
int fd;
xvid_plugin_single_t single = { 0 };
struct xvid_ff_pass1 rc2pass1 = { 0 };
xvid_plugin_2pass2_t rc2pass2 = { 0 };
xvid_plugin_lumimasking_t masking_l = { 0 }; /* For lumi masking */
xvid_plugin_lumimasking_t masking_v = { 0 }; /* For variance AQ */
xvid_plugin_ssim_t ssim = { 0 };
xvid_gbl_init_t xvid_gbl_init = { 0 };
xvid_enc_create_t xvid_enc_create = { 0 };
xvid_enc_plugin_t plugins[4];
x->twopassfd = -1;
/* Bring in VOP flags from ffmpeg command-line */
x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
if (xvid_flags & AV_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 & AV_CODEC_FLAG_AC_PRED)
x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
if (xvid_flags & AV_CODEC_FLAG_GRAY)
x->vop_flags |= XVID_VOP_GREYSCALE;
/* Decide which ME quality setting to use */
x->me_flags = 0;
switch (x->me_quality) {
case 6:
case 5:
x->me_flags |= XVID_ME_EXTSEARCH16 |
XVID_ME_EXTSEARCH8;
case 4:
case 3:
x->me_flags |= XVID_ME_ADVANCEDDIAMOND8 |
XVID_ME_HALFPELREFINE8 |
XVID_ME_CHROMA_PVOP |
XVID_ME_CHROMA_BVOP;
case 2:
case 1:
x->me_flags |= XVID_ME_ADVANCEDDIAMOND16 |
XVID_ME_HALFPELREFINE16;
}
/* 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 (x->gmc) {
x->vol_flags |= XVID_VOL_GMC;
x->me_flags |= XVID_ME_GME_REFINE;
}
if (xvid_flags & AV_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;
}
xvid_gbl_init.version = XVID_VERSION;
xvid_gbl_init.debug = 0;
xvid_gbl_init.cpu_flags = 0;
/* Initialize */
xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
/* Create the encoder reference */
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;
#if (XVID_VERSION <= 0x010303) && (XVID_VERSION >= 0x010300)
/* workaround for a bug in libxvidcore */
if (avctx->height <= 16) {
if (avctx->thread_count < 2) {
xvid_enc_create.num_threads = 0;
} else {
av_log(avctx, AV_LOG_ERROR,
"Too small height for threads > 1.");
return AVERROR(EINVAL);
}
}
#endif
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 & AV_CODEC_FLAG_PASS1) {
rc2pass1.version = XVID_VERSION;
rc2pass1.context = x;
x->twopassbuffer = av_malloc(BUFFER_SIZE);
x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
if (!x->twopassbuffer || !x->old_twopassbuffer) {
av_log(avctx, AV_LOG_ERROR,
"Xvid: Cannot allocate 2-pass log buffers\n");
return AVERROR(ENOMEM);
}
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 & AV_CODEC_FLAG_PASS2) {
rc2pass2.version = XVID_VERSION;
rc2pass2.bitrate = avctx->bit_rate;
fd = avpriv_tempfile("xvidff.", &x->twopassfile, 0, avctx);
if (fd < 0) {
av_log(avctx, AV_LOG_ERROR, "Xvid: Cannot write 2-pass pipe\n");
return fd;
}
x->twopassfd = fd;
if (!avctx->stats_in) {
av_log(avctx, AV_LOG_ERROR,
"Xvid: No 2-pass information loaded for second pass\n");
return AVERROR(EINVAL);
}
ret = write(fd, avctx->stats_in, strlen(avctx->stats_in));
if (ret == -1)
ret = AVERROR(errno);
else if (strlen(avctx->stats_in) > ret) {
av_log(avctx, AV_LOG_ERROR, "Xvid: Cannot write to 2-pass pipe\n");
ret = AVERROR(EIO);
}
if (ret < 0)
return ret;
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 & AV_CODEC_FLAG_QSCALE)) {
/* Single Pass Bitrate Control! */
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++;
}
if (avctx->lumi_masking != 0.0)
x->lumi_aq = 1;
/* Luminance Masking */
if (x->lumi_aq) {
masking_l.method = 0;
plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
/* The old behavior is that when avctx->lumi_masking is specified,
* plugins[...].param = NULL. Trying to keep the old behavior here. */
plugins[xvid_enc_create.num_plugins].param =
avctx->lumi_masking ? NULL : &masking_l;
xvid_enc_create.num_plugins++;
}
/* Variance AQ */
if (x->variance_aq) {
masking_v.method = 1;
plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
plugins[xvid_enc_create.num_plugins].param = &masking_v;
xvid_enc_create.num_plugins++;
}
if (x->lumi_aq && x->variance_aq )
av_log(avctx, AV_LOG_INFO,
"Both lumi_aq and variance_aq are enabled. The resulting quality"
"will be the worse one of the two effects made by the AQ.\n");
/* SSIM */
if (x->ssim) {
plugins[xvid_enc_create.num_plugins].func = xvid_plugin_ssim;
ssim.b_printstat = x->ssim == 2;
ssim.acc = x->ssim_acc;
ssim.cpu_flags = xvid_gbl_init.cpu_flags;
ssim.b_visualize = 0;
plugins[xvid_enc_create.num_plugins].param = &ssim;
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 & AV_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 (x->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);
if (!x->intra_matrix)
return AVERROR(ENOMEM);
} else
intra = NULL;
if (avctx->inter_matrix) {
inter = avctx->inter_matrix;
x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
if (!x->inter_matrix)
return AVERROR(ENOMEM);
} 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 & AV_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 & AV_CODEC_FLAG_GLOBAL_HEADER) {
/* In this case, we are claiming to be MPEG-4 */
x->quicktime_format = 1;
avctx->codec_id = AV_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;
av_assert0(xvid_enc_create.num_plugins + (!!x->ssim) + (!!x->variance_aq) + (!!x->lumi_aq) <= FF_ARRAY_ELEMS(plugins));
/* Encode a dummy frame to get the extradata immediately */
if (x->quicktime_format) {
AVFrame *picture;
AVPacket *packet;
int size, got_packet;
packet = av_packet_alloc();
if (!packet)
return AVERROR(ENOMEM);
picture = av_frame_alloc();
if (!picture) {
av_packet_free(&packet);
return AVERROR(ENOMEM);
}
xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
if( xerr ) {
av_packet_free(&packet);
av_frame_free(&picture);
av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
return AVERROR_EXTERNAL;
}
x->encoder_handle = xvid_enc_create.handle;
size = ((avctx->width + 1) & ~1) * ((avctx->height + 1) & ~1);
picture->data[0] = av_malloc(size + size / 2);
if (!picture->data[0]) {
av_packet_free(&packet);
av_frame_free(&picture);
return AVERROR(ENOMEM);
}
picture->data[1] = picture->data[0] + size;
picture->data[2] = picture->data[1] + size / 4;
memset(picture->data[0], 0, size);
memset(picture->data[1], 128, size / 2);
xvid_encode_frame(avctx, packet, picture, &got_packet);
av_packet_free(&packet);
av_free(picture->data[0]);
av_frame_free(&picture);
xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
}
/* 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 AVERROR_EXTERNAL;
}
x->encoder_handle = xvid_enc_create.handle;
return 0;
}
static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *picture, int *got_packet)
{
int xerr, i, ret;
struct xvid_context *x = avctx->priv_data;
int mb_width = (avctx->width + 15) / 16;
int mb_height = (avctx->height + 15) / 16;
char *tmp;
xvid_enc_frame_t xvid_enc_frame = { 0 };
xvid_enc_stats_t xvid_enc_stats = { 0 };
if ((ret = ff_alloc_packet(avctx, pkt, mb_width*(int64_t)mb_height*MAX_MB_BYTES + AV_INPUT_BUFFER_MIN_SIZE)) < 0)
return ret;
/* Start setting up the frame */
xvid_enc_frame.version = XVID_VERSION;
xvid_enc_stats.version = XVID_VERSION;
/* Let Xvid know where to put the frame. */
xvid_enc_frame.bitstream = pkt->data;
xvid_enc_frame.length = pkt->size;
/* Initialize input image fields */
if (avctx->pix_fmt != AV_PIX_FMT_YUV420P) {
av_log(avctx, AV_LOG_ERROR,
"Xvid: Color spaces other than 420P not supported\n");
return AVERROR(EINVAL);
}
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 < 0 || avctx->sample_aspect_ratio.num > 255 ||
avctx->sample_aspect_ratio.den < 0 || avctx->sample_aspect_ratio.den > 255) {
av_log(avctx, AV_LOG_WARNING,
"Invalid pixel aspect ratio %i/%i, limit is 255/255 reducing\n",
avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
av_reduce(&avctx->sample_aspect_ratio.num, &avctx->sample_aspect_ratio.den,
avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 255);
}
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 (xerr > 0) {
int pict_type;
*got_packet = 1;
if (xvid_enc_stats.type == XVID_TYPE_PVOP)
pict_type = AV_PICTURE_TYPE_P;
else if (xvid_enc_stats.type == XVID_TYPE_BVOP)
pict_type = AV_PICTURE_TYPE_B;
else if (xvid_enc_stats.type == XVID_TYPE_SVOP)
pict_type = AV_PICTURE_TYPE_S;
else
pict_type = AV_PICTURE_TYPE_I;
ff_side_data_set_encoder_stats(pkt, xvid_enc_stats.quant * FF_QP2LAMBDA, NULL, 0, pict_type);
if (xvid_enc_frame.out_flags & XVID_KEYFRAME) {
pkt->flags |= AV_PKT_FLAG_KEY;
if (x->quicktime_format)
return xvid_strip_vol_header(avctx, pkt,
xvid_enc_stats.hlength, xerr);
}
pkt->size = xerr;
return 0;
} else {
if (!xerr)
return 0;
av_log(avctx, AV_LOG_ERROR,
"Xvid: Encoding Error Occurred: %i\n", xerr);
return AVERROR_EXTERNAL;
}
}
static av_cold int xvid_encode_close(AVCodecContext *avctx)
{
struct xvid_context *x = avctx->priv_data;
if (x->encoder_handle) {
xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
x->encoder_handle = NULL;
}
if (x->twopassbuffer) {
av_freep(&x->twopassbuffer);
av_freep(&x->old_twopassbuffer);
avctx->stats_out = NULL;
}
if (x->twopassfd>=0) {
unlink(x->twopassfile);
close(x->twopassfd);
x->twopassfd = -1;
}
av_freep(&x->twopassfile);
av_freep(&x->intra_matrix);
av_freep(&x->inter_matrix);
return 0;
}
#define OFFSET(x) offsetof(struct xvid_context, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "lumi_aq", "Luminance masking AQ", OFFSET(lumi_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
{ "variance_aq", "Variance AQ", OFFSET(variance_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
{ "ssim", "Show SSIM information to stdout", OFFSET(ssim), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, VE, "ssim" },
{ "off", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "ssim" },
{ "avg", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "ssim" },
{ "frame", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "ssim" },
{ "ssim_acc", "SSIM accuracy", OFFSET(ssim_acc), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, 4, VE },
{ "gmc", "use GMC", OFFSET(gmc), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
{ "me_quality", "Motion estimation quality", OFFSET(me_quality), AV_OPT_TYPE_INT, { .i64 = 4 }, 0, 6, VE },
{ "mpeg_quant", "Use MPEG quantizers instead of H.263", OFFSET(mpeg_quant), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
{ NULL },
};
static const AVClass xvid_class = {
.class_name = "libxvid",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const AVCodec ff_libxvid_encoder = {
.name = "libxvid",
.long_name = NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MPEG4,
.priv_data_size = sizeof(struct xvid_context),
.init = xvid_encode_init,
.encode2 = xvid_encode_frame,
.close = xvid_encode_close,
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
.priv_class = &xvid_class,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
FF_CODEC_CAP_INIT_CLEANUP,
.wrapper_name = "libxvid",
};