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vlc/modules/codec/avcodec/encoder.c

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/*****************************************************************************
* encoder.c: video and audio encoder using the ffmpeg library
*****************************************************************************
* Copyright (C) 1999-2004 the VideoLAN team
* $Id$
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Gildas Bazin <gbazin@videolan.org>
* Christophe Massiot <massiot@via.ecp.fr>
* Part of the file Copyright (C) FFMPEG Project Developers
* (mpeg4_default matrixes)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_vout.h>
#include <vlc_aout.h>
#include <vlc_sout.h>
#include <vlc_codec.h>
#include <vlc_interface.h>
/* ffmpeg header */
#define HAVE_MMX 1
#ifdef HAVE_LIBAVCODEC_AVCODEC_H
# include <libavcodec/avcodec.h>
#elif defined(HAVE_FFMPEG_AVCODEC_H)
# include <ffmpeg/avcodec.h>
#else
# include <avcodec.h>
#endif
#include "avcodec.h"
#include "chroma.h"
#include "fourcc.h"
#define HURRY_UP_GUARD1 (450000)
#define HURRY_UP_GUARD2 (300000)
#define HURRY_UP_GUARD3 (100000)
#define MAX_FRAME_DELAY (FF_MAX_B_FRAMES + 2)
/*****************************************************************************
* Local prototypes
*****************************************************************************/
int OpenEncoder ( vlc_object_t * );
void CloseEncoder( vlc_object_t * );
static block_t *EncodeVideo( encoder_t *, picture_t * );
static block_t *EncodeAudio( encoder_t *, aout_buffer_t * );
struct thread_context_t;
static void* FfmpegThread( vlc_object_t *p_this );
static int FfmpegExecute( AVCodecContext *s,
int (*pf_func)(AVCodecContext *c2, void *arg2),
void **arg, int *ret, int count );
/*****************************************************************************
* thread_context_t : for multithreaded encoding
*****************************************************************************/
struct thread_context_t
{
VLC_COMMON_MEMBERS
AVCodecContext *p_context;
int (* pf_func)(AVCodecContext *c, void *arg);
void *arg;
int i_ret;
vlc_mutex_t lock;
vlc_cond_t cond;
bool b_work, b_done;
};
/*****************************************************************************
* encoder_sys_t : ffmpeg encoder descriptor
*****************************************************************************/
struct encoder_sys_t
{
/*
* Ffmpeg properties
*/
AVCodec *p_codec;
AVCodecContext *p_context;
/*
* Common properties
*/
char *p_buffer;
uint8_t *p_buffer_out;
size_t i_buffer_out;
/*
* Video properties
*/
mtime_t i_last_ref_pts;
mtime_t i_buggy_pts_detect;
mtime_t i_last_pts;
bool b_inited;
/*
* Audio properties
*/
int i_frame_size;
int i_samples_delay;
mtime_t i_pts;
/* Encoding settings */
int i_key_int;
int i_b_frames;
int i_vtolerance;
int i_qmin;
int i_qmax;
int i_hq;
int i_rc_buffer_size;
float f_rc_buffer_aggressivity;
bool b_pre_me;
bool b_hurry_up;
bool b_interlace, b_interlace_me;
float f_i_quant_factor;
int i_noise_reduction;
bool b_mpeg4_matrix;
bool b_trellis;
int i_quality; /* for VBR */
float f_lumi_masking, f_dark_masking, f_p_masking, f_border_masking;
int i_luma_elim, i_chroma_elim;
#if LIBAVCODEC_VERSION_INT >= ((51<<16)+(40<<8)+4)
int i_aac_profile; /* AAC profile to use.*/
#endif
/* Used to work around stupid timestamping behaviour in libavcodec */
uint64_t i_framenum;
mtime_t pi_delay_pts[MAX_FRAME_DELAY];
};
static const char *const ppsz_enc_options[] = {
"keyint", "bframes", "vt", "qmin", "qmax", "hq",
"rc-buffer-size", "rc-buffer-aggressivity", "pre-me", "hurry-up",
"interlace", "i-quant-factor", "noise-reduction", "mpeg4-matrix",
"trellis", "qscale", "strict", "lumi-masking", "dark-masking",
"p-masking", "border-masking", "luma-elim-threshold",
"chroma-elim-threshold",
#if LIBAVCODEC_VERSION_INT >= ((51<<16)+(40<<8)+4)
"aac-profile",
#endif
NULL
};
static const uint16_t mpa_bitrate_tab[2][15] =
{
{0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384},
{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160}
};
static const uint16_t mpa_freq_tab[6] =
{ 44100, 48000, 32000, 22050, 24000, 16000 };
static const uint16_t mpeg4_default_intra_matrix[64] = {
8, 17, 18, 19, 21, 23, 25, 27,
17, 18, 19, 21, 23, 25, 27, 28,
20, 21, 22, 23, 24, 26, 28, 30,
21, 22, 23, 24, 26, 28, 30, 32,
22, 23, 24, 26, 28, 30, 32, 35,
23, 24, 26, 28, 30, 32, 35, 38,
25, 26, 28, 30, 32, 35, 38, 41,
27, 28, 30, 32, 35, 38, 41, 45,
};
static const uint16_t mpeg4_default_non_intra_matrix[64] = {
16, 17, 18, 19, 20, 21, 22, 23,
17, 18, 19, 20, 21, 22, 23, 24,
18, 19, 20, 21, 22, 23, 24, 25,
19, 20, 21, 22, 23, 24, 26, 27,
20, 21, 22, 23, 25, 26, 27, 28,
21, 22, 23, 24, 26, 27, 28, 30,
22, 23, 24, 26, 27, 28, 30, 31,
23, 24, 25, 27, 28, 30, 31, 33,
};
/*****************************************************************************
* OpenEncoder: probe the encoder
*****************************************************************************/
int OpenEncoder( vlc_object_t *p_this )
{
encoder_t *p_enc = (encoder_t *)p_this;
encoder_sys_t *p_sys = p_enc->p_sys;
AVCodecContext *p_context;
AVCodec *p_codec;
int i_codec_id, i_cat;
const char *psz_namecodec;
vlc_value_t val;
if( !GetFfmpegCodec( p_enc->fmt_out.i_codec, &i_cat, &i_codec_id,
&psz_namecodec ) )
{
if( TestFfmpegChroma( -1, p_enc->fmt_out.i_codec ) != VLC_SUCCESS )
{
/* handed chroma output */
return VLC_EGENERIC;
}
i_cat = VIDEO_ES;
i_codec_id = CODEC_ID_RAWVIDEO;
psz_namecodec = "Raw video";
}
if( p_enc->fmt_out.i_cat == VIDEO_ES && i_cat != VIDEO_ES )
{
msg_Err( p_enc, "\"%s\" is not a video encoder", psz_namecodec );
intf_UserFatal( p_enc, false, _("Streaming / Transcoding failed"),
_("\"%s\" is no video encoder."), psz_namecodec );
return VLC_EGENERIC;
}
if( p_enc->fmt_out.i_cat == AUDIO_ES && i_cat != AUDIO_ES )
{
msg_Err( p_enc, "\"%s\" is not an audio encoder", psz_namecodec );
intf_UserFatal( p_enc, false, _("Streaming / Transcoding failed"),
_("\"%s\" is no audio encoder."), psz_namecodec );
return VLC_EGENERIC;
}
/* Initialization must be done before avcodec_find_encoder() */
InitLibavcodec( p_this );
p_codec = avcodec_find_encoder( i_codec_id );
if( !p_codec )
{
msg_Err( p_enc, "cannot find encoder %s", psz_namecodec );
intf_UserFatal( p_enc, false, _("Streaming / Transcoding failed"),
_("VLC could not find encoder \"%s\"."), psz_namecodec );
return VLC_EGENERIC;
}
/* Allocate the memory needed to store the encoder's structure */
if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
return VLC_ENOMEM;
memset( p_sys, 0, sizeof(encoder_sys_t) );
p_enc->p_sys = p_sys;
p_sys->p_codec = p_codec;
p_enc->pf_encode_video = EncodeVideo;
p_enc->pf_encode_audio = EncodeAudio;
p_sys->p_buffer = NULL;
p_sys->p_buffer_out = NULL;
p_sys->i_buffer_out = 0;
p_sys->p_context = p_context = avcodec_alloc_context();
p_context->debug = config_GetInt( p_enc, "ffmpeg-debug" );
p_context->opaque = (void *)p_this;
/* Set CPU capabilities */
unsigned i_cpu = vlc_CPU();
p_context->dsp_mask = 0;
if( !(i_cpu & CPU_CAPABILITY_MMX) )
{
p_context->dsp_mask |= FF_MM_MMX;
}
if( !(i_cpu & CPU_CAPABILITY_MMXEXT) )
{
p_context->dsp_mask |= FF_MM_MMXEXT;
}
if( !(i_cpu & CPU_CAPABILITY_3DNOW) )
{
p_context->dsp_mask |= FF_MM_3DNOW;
}
if( !(i_cpu & CPU_CAPABILITY_SSE) )
{
p_context->dsp_mask |= FF_MM_SSE;
p_context->dsp_mask |= FF_MM_SSE2;
}
config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
var_Get( p_enc, ENC_CFG_PREFIX "keyint", &val );
p_sys->i_key_int = val.i_int;
var_Get( p_enc, ENC_CFG_PREFIX "bframes", &val );
p_sys->i_b_frames = val.i_int;
var_Get( p_enc, ENC_CFG_PREFIX "vt", &val );
p_sys->i_vtolerance = val.i_int * 1000;
var_Get( p_enc, ENC_CFG_PREFIX "interlace", &val );
p_sys->b_interlace = val.b_bool;
var_Get( p_enc, ENC_CFG_PREFIX "interlace-me", &val );
p_sys->b_interlace_me = val.b_bool;
var_Get( p_enc, ENC_CFG_PREFIX "pre-me", &val );
p_sys->b_pre_me = val.b_bool;
var_Get( p_enc, ENC_CFG_PREFIX "hurry-up", &val );
p_sys->b_hurry_up = val.b_bool;
if( p_sys->b_hurry_up )
{
/* hurry up mode needs noise reduction, even small */
p_sys->i_noise_reduction = 1;
}
var_Get( p_enc, ENC_CFG_PREFIX "rc-buffer-size", &val );
p_sys->i_rc_buffer_size = val.i_int;
var_Get( p_enc, ENC_CFG_PREFIX "rc-buffer-aggressivity", &val );
p_sys->f_rc_buffer_aggressivity = val.f_float;
var_Get( p_enc, ENC_CFG_PREFIX "i-quant-factor", &val );
p_sys->f_i_quant_factor = val.f_float;
var_Get( p_enc, ENC_CFG_PREFIX "noise-reduction", &val );
p_sys->i_noise_reduction = val.i_int;
var_Get( p_enc, ENC_CFG_PREFIX "mpeg4-matrix", &val );
p_sys->b_mpeg4_matrix = val.b_bool;
var_Get( p_enc, ENC_CFG_PREFIX "qscale", &val );
if( val.f_float < 0.01 || val.f_float > 255.0 ) val.f_float = 0;
p_sys->i_quality = (int)(FF_QP2LAMBDA * val.f_float + 0.5);
var_Get( p_enc, ENC_CFG_PREFIX "hq", &val );
p_sys->i_hq = FF_MB_DECISION_RD;
if( val.psz_string && *val.psz_string )
{
if( !strcmp( val.psz_string, "rd" ) )
p_sys->i_hq = FF_MB_DECISION_RD;
else if( !strcmp( val.psz_string, "bits" ) )
p_sys->i_hq = FF_MB_DECISION_BITS;
else if( !strcmp( val.psz_string, "simple" ) )
p_sys->i_hq = FF_MB_DECISION_SIMPLE;
else
p_sys->i_hq = FF_MB_DECISION_RD;
}
else
p_sys->i_hq = FF_MB_DECISION_RD;
free( val.psz_string );
var_Get( p_enc, ENC_CFG_PREFIX "qmin", &val );
p_sys->i_qmin = val.i_int;
var_Get( p_enc, ENC_CFG_PREFIX "qmax", &val );
p_sys->i_qmax = val.i_int;
var_Get( p_enc, ENC_CFG_PREFIX "trellis", &val );
p_sys->b_trellis = val.b_bool;
var_Get( p_enc, ENC_CFG_PREFIX "strict", &val );
if( val.i_int < - 1 || val.i_int > 1 ) val.i_int = 0;
p_context->strict_std_compliance = val.i_int;
var_Get( p_enc, ENC_CFG_PREFIX "lumi-masking", &val );
p_sys->f_lumi_masking = val.f_float;
var_Get( p_enc, ENC_CFG_PREFIX "dark-masking", &val );
p_sys->f_dark_masking = val.f_float;
var_Get( p_enc, ENC_CFG_PREFIX "p-masking", &val );
p_sys->f_p_masking = val.f_float;
var_Get( p_enc, ENC_CFG_PREFIX "border-masking", &val );
p_sys->f_border_masking = val.f_float;
var_Get( p_enc, ENC_CFG_PREFIX "luma-elim-threshold", &val );
p_sys->i_luma_elim = val.i_int;
var_Get( p_enc, ENC_CFG_PREFIX "chroma-elim-threshold", &val );
p_sys->i_chroma_elim = val.i_int;
#if LIBAVCODEC_VERSION_INT >= ((51<<16)+(40<<8)+4)
var_Get( p_enc, ENC_CFG_PREFIX "aac-profile", &val );
p_sys->i_aac_profile = FF_PROFILE_AAC_LOW;
if( val.psz_string && *val.psz_string )
{
if( !strncmp( val.psz_string, "main", 4 ) )
p_sys->i_aac_profile = FF_PROFILE_AAC_MAIN;
else if( !strncmp( val.psz_string, "low", 3 ) )
p_sys->i_aac_profile = FF_PROFILE_AAC_LOW;
#if 0 /* Not supported by FAAC encoder */
else if( !strncmp( val.psz_string, "ssr", 3 ) )
p_sys->i_aac_profile = FF_PROFILE_AAC_SSR;
#endif
else if( !strncmp( val.psz_string, "ltp", 3 ) )
p_sys->i_aac_profile = FF_PROFILE_AAC_LTP;
else
{
msg_Warn( p_enc, "unknown AAC profile requested, setting it to low" );
p_sys->i_aac_profile = FF_PROFILE_AAC_LOW;
}
}
free( val.psz_string );
#endif
if( p_enc->fmt_in.i_cat == VIDEO_ES )
{
int i_aspect_num, i_aspect_den;
if( !p_enc->fmt_in.video.i_width || !p_enc->fmt_in.video.i_height )
{
msg_Warn( p_enc, "invalid size %ix%i", p_enc->fmt_in.video.i_width,
p_enc->fmt_in.video.i_height );
free( p_sys );
return VLC_EGENERIC;
}
p_context->width = p_enc->fmt_in.video.i_width;
p_context->height = p_enc->fmt_in.video.i_height;
if( p_enc->fmt_out.i_codec == VLC_FOURCC('m', 'p', '2', 'v')
&& (p_context->width > 720 || p_context->height > 576) )
p_context->level = 4; /* High level */
p_context->time_base.num = p_enc->fmt_in.video.i_frame_rate_base;
p_context->time_base.den = p_enc->fmt_in.video.i_frame_rate;
/* Defaults from ffmpeg.c */
p_context->qblur = 0.5;
p_context->qcompress = 0.5;
p_context->b_quant_offset = 1.25;
p_context->b_quant_factor = 1.25;
p_context->i_quant_offset = 0.0;
p_context->i_quant_factor = -0.8;
p_context->lumi_masking = p_sys->f_lumi_masking;
p_context->dark_masking = p_sys->f_dark_masking;
p_context->p_masking = p_sys->f_p_masking;
p_context->border_masking = p_sys->f_border_masking;
p_context->luma_elim_threshold = p_sys->i_luma_elim;
p_context->chroma_elim_threshold = p_sys->i_chroma_elim;
if( p_sys->i_key_int > 0 )
p_context->gop_size = p_sys->i_key_int;
p_context->max_b_frames =
__MAX( __MIN( p_sys->i_b_frames, FF_MAX_B_FRAMES ), 0 );
p_context->b_frame_strategy = 0;
if( !p_context->max_b_frames &&
( p_enc->fmt_out.i_codec == VLC_FOURCC('m', 'p', '2', 'v') ||
p_enc->fmt_out.i_codec == VLC_FOURCC('m', 'p', '1', 'v') ) )
p_context->flags |= CODEC_FLAG_LOW_DELAY;
av_reduce( &i_aspect_num, &i_aspect_den,
p_enc->fmt_in.video.i_aspect,
VOUT_ASPECT_FACTOR, 1 << 30 /* something big */ );
av_reduce( &p_context->sample_aspect_ratio.num,
&p_context->sample_aspect_ratio.den,
i_aspect_num * (int64_t)p_context->height,
i_aspect_den * (int64_t)p_context->width, 1 << 30 );
p_sys->i_buffer_out = p_context->height * p_context->width * 3;
if( p_sys->i_buffer_out < FF_MIN_BUFFER_SIZE )
p_sys->i_buffer_out = FF_MIN_BUFFER_SIZE;
p_sys->p_buffer_out = malloc( p_sys->i_buffer_out );
p_enc->fmt_in.i_codec = VLC_FOURCC('I','4','2','0');
p_enc->fmt_in.video.i_chroma = p_enc->fmt_in.i_codec;
GetFfmpegChroma( &p_context->pix_fmt, p_enc->fmt_in.video );
if( p_codec->pix_fmts )
{
const enum PixelFormat *p = p_codec->pix_fmts;
for( ; *p != -1; p++ )
{
if( *p == p_context->pix_fmt ) break;
}
if( *p == -1 ) p_context->pix_fmt = p_codec->pix_fmts[0];
GetVlcChroma( &p_enc->fmt_in.video, p_context->pix_fmt );
p_enc->fmt_in.i_codec = p_enc->fmt_in.video.i_chroma;
}
if ( p_sys->f_i_quant_factor != 0.0 )
p_context->i_quant_factor = p_sys->f_i_quant_factor;
p_context->noise_reduction = p_sys->i_noise_reduction;
if ( p_sys->b_mpeg4_matrix )
{
p_context->intra_matrix = mpeg4_default_intra_matrix;
p_context->inter_matrix = mpeg4_default_non_intra_matrix;
}
if ( p_sys->b_pre_me )
{
p_context->pre_me = 1;
p_context->me_pre_cmp = FF_CMP_CHROMA;
}
if ( p_sys->b_interlace )
{
if ( p_context->height <= 280 )
{
if ( p_context->height != 16 || p_context->width != 16 )
msg_Warn( p_enc,
"disabling interlaced video because height=%d <= 280",
p_context->height );
}
else
{
p_context->flags |= CODEC_FLAG_INTERLACED_DCT;
if ( p_sys->b_interlace_me )
p_context->flags |= CODEC_FLAG_INTERLACED_ME;
}
}
if ( p_sys->b_trellis )
p_context->flags |= CODEC_FLAG_TRELLIS_QUANT;
if ( p_sys->i_qmin > 0 && p_sys->i_qmin == p_sys->i_qmax )
p_context->flags |= CODEC_FLAG_QSCALE;
if ( p_enc->i_threads >= 1 )
p_context->thread_count = p_enc->i_threads;
if( p_sys->i_vtolerance > 0 )
p_context->bit_rate_tolerance = p_sys->i_vtolerance;
/* usually if someone sets bitrate, he likes more to get that bitrate
* over quality should help 'normal' user to get asked bitrate
*/
if( p_enc->fmt_out.i_bitrate > 0 && p_sys->i_qmax == 0 && p_sys->i_qmin == 0 )
{
p_sys->i_qmax = 51;
p_sys->i_qmin = 3;
}
if( p_sys->i_qmin > 0 )
{
p_context->mb_qmin = p_context->qmin = p_sys->i_qmin;
p_context->mb_lmin = p_context->lmin = p_sys->i_qmin * FF_QP2LAMBDA;
}
if( p_sys->i_qmax > 0 )
{
p_context->mb_qmax = p_context->qmax = p_sys->i_qmax;
p_context->mb_lmax = p_context->lmax = p_sys->i_qmax * FF_QP2LAMBDA;
}
p_context->max_qdiff = 3;
p_context->mb_decision = p_sys->i_hq;
if( p_sys->i_quality )
{
p_context->flags |= CODEC_FLAG_QSCALE;
p_context->global_quality = p_sys->i_quality;
}
else
{
p_context->rc_qsquish = 1.0;
p_context->rc_max_rate = p_enc->fmt_out.i_bitrate;
p_context->rc_min_rate = p_enc->fmt_out.i_bitrate;
p_context->rc_buffer_size = p_sys->i_rc_buffer_size;
/* This is from ffmpeg's ffmpeg.c : */
p_context->rc_initial_buffer_occupancy
= p_sys->i_rc_buffer_size * 3/4;
p_context->rc_buffer_aggressivity = p_sys->f_rc_buffer_aggressivity;
}
}
else if( p_enc->fmt_in.i_cat == AUDIO_ES )
{
/* work around bug in libmp3lame encoding */
if( i_codec_id == CODEC_ID_MP3 && p_enc->fmt_in.audio.i_channels > 2 )
p_enc->fmt_in.audio.i_channels = 2;
p_enc->fmt_in.i_codec = AOUT_FMT_S16_NE;
p_context->sample_rate = p_enc->fmt_out.audio.i_rate;
p_context->channels = p_enc->fmt_out.audio.i_channels;
if ( p_enc->fmt_out.i_codec == VLC_FOURCC('m','p','4','a') )
{
/* XXX: FAAC does resample only when setting the INPUT samplerate
* to the desired value (-R option of the faac frontend)
p_enc->fmt_in.audio.i_rate = p_context->sample_rate;*/
#if LIBAVCODEC_VERSION_INT >= ((51<<16)+(40<<8)+4)
/* Ignore FF_PROFILE_UNKNOWN */
if( p_sys->i_aac_profile >= FF_PROFILE_AAC_MAIN )
p_context->profile = p_sys->i_aac_profile;
#endif
}
}
/* Misc parameters */
p_context->bit_rate = p_enc->fmt_out.i_bitrate;
if( i_codec_id == CODEC_ID_RAWVIDEO )
{
/* XXX: hack: Force same codec (will be handled by transcode) */
p_enc->fmt_in.video.i_chroma = p_enc->fmt_in.i_codec = p_enc->fmt_out.i_codec;
GetFfmpegChroma( &p_context->pix_fmt, p_enc->fmt_in.video );
}
/* Make sure we get extradata filled by the encoder */
p_context->extradata_size = 0;
p_context->extradata = NULL;
p_context->flags |= CODEC_FLAG_GLOBAL_HEADER;
vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
if( avcodec_open( p_context, p_codec ) )
{
vlc_mutex_unlock( lock );
if( p_enc->fmt_in.i_cat == AUDIO_ES &&
(p_context->channels > 2 || i_codec_id == CODEC_ID_MP2
|| i_codec_id == CODEC_ID_MP3) )
{
if( p_context->channels > 2 )
{
p_context->channels = 2;
p_enc->fmt_in.audio.i_channels = 2; // FIXME
msg_Warn( p_enc, "stereo mode selected (codec limitation)" );
}
if( i_codec_id == CODEC_ID_MP2 || i_codec_id == CODEC_ID_MP3 )
{
int i_frequency, i;
for ( i_frequency = 0; i_frequency < 6; i_frequency++ )
{
if ( p_enc->fmt_out.audio.i_rate
== mpa_freq_tab[i_frequency] )
break;
}
if ( i_frequency == 6 )
{
msg_Err( p_enc, "MPEG audio doesn't support frequency=%d",
p_enc->fmt_out.audio.i_rate );
free( p_sys );
return VLC_EGENERIC;
}
for ( i = 1; i < 14; i++ )
{
if ( p_enc->fmt_out.i_bitrate / 1000
<= mpa_bitrate_tab[i_frequency / 3][i] )
break;
}
if ( p_enc->fmt_out.i_bitrate / 1000
!= mpa_bitrate_tab[i_frequency / 3][i] )
{
msg_Warn( p_enc,
"MPEG audio doesn't support bitrate=%d, using %d",
p_enc->fmt_out.i_bitrate,
mpa_bitrate_tab[i_frequency / 3][i] * 1000 );
p_enc->fmt_out.i_bitrate =
mpa_bitrate_tab[i_frequency / 3][i] * 1000;
p_context->bit_rate = p_enc->fmt_out.i_bitrate;
}
}
p_context->codec = NULL;
vlc_mutex_lock( lock );
if( avcodec_open( p_context, p_codec ) )
{
vlc_mutex_unlock( lock );
msg_Err( p_enc, "cannot open encoder" );
intf_UserFatal( p_enc, false,
_("Streaming / Transcoding failed"),
_("VLC could not open the encoder.") );
free( p_sys );
return VLC_EGENERIC;
}
}
else
{
msg_Err( p_enc, "cannot open encoder" );
intf_UserFatal( p_enc, false, _("Streaming / Transcoding failed"),
_("VLC could not open the encoder.") );
free( p_sys );
return VLC_EGENERIC;
}
}
vlc_mutex_unlock( lock);
p_enc->fmt_out.i_extra = p_context->extradata_size;
if( p_enc->fmt_out.i_extra )
{
p_enc->fmt_out.p_extra = malloc( p_enc->fmt_out.i_extra );
memcpy( p_enc->fmt_out.p_extra, p_context->extradata,
p_enc->fmt_out.i_extra );
}
p_context->flags &= ~CODEC_FLAG_GLOBAL_HEADER;
if( p_enc->fmt_in.i_cat == AUDIO_ES )
{
p_sys->i_buffer_out = 2 * AVCODEC_MAX_AUDIO_FRAME_SIZE;
p_sys->p_buffer_out = malloc( p_sys->i_buffer_out );
p_sys->i_frame_size = p_context->frame_size * 2 * p_context->channels;
p_sys->p_buffer = malloc( p_sys->i_frame_size );
p_enc->fmt_out.audio.i_blockalign = p_context->block_align;
}
msg_Dbg( p_enc, "found encoder %s", psz_namecodec );
return VLC_SUCCESS;
}
/****************************************************************************
* Ffmpeg threading system
****************************************************************************/
static void* FfmpegThread( vlc_object_t *p_this )
{
struct thread_context_t *p_context = (struct thread_context_t *)p_this;
while ( vlc_object_alive (p_context) && !p_context->b_error )
{
vlc_mutex_lock( &p_context->lock );
while ( !p_context->b_work && vlc_object_alive (p_context) && !p_context->b_error )
{
vlc_cond_wait( &p_context->cond, &p_context->lock );
}
p_context->b_work = 0;
vlc_mutex_unlock( &p_context->lock );
if ( !vlc_object_alive (p_context) || p_context->b_error )
break;
if ( p_context->pf_func )
{
p_context->i_ret = p_context->pf_func( p_context->p_context,
p_context->arg );
}
vlc_mutex_lock( &p_context->lock );
p_context->b_done = 1;
vlc_cond_signal( &p_context->cond );
vlc_mutex_unlock( &p_context->lock );
}
return NULL;
}
static int FfmpegExecute( AVCodecContext *s,
int (*pf_func)(AVCodecContext *c2, void *arg2),
void **arg, int *ret, int count )
{
struct thread_context_t ** pp_contexts =
(struct thread_context_t **)s->thread_opaque;
int i;
/* Note, we can be certain that this is not called with the same
* AVCodecContext by different threads at the same time */
for ( i = 0; i < count; i++ )
{
vlc_mutex_lock( &pp_contexts[i]->lock );
pp_contexts[i]->arg = arg[i];
pp_contexts[i]->pf_func = pf_func;
pp_contexts[i]->i_ret = 12345;
pp_contexts[i]->b_work = 1;
vlc_cond_signal( &pp_contexts[i]->cond );
vlc_mutex_unlock( &pp_contexts[i]->lock );
}
for ( i = 0; i < count; i++ )
{
vlc_mutex_lock( &pp_contexts[i]->lock );
while ( !pp_contexts[i]->b_done )
{
vlc_cond_wait( &pp_contexts[i]->cond, &pp_contexts[i]->lock );
}
pp_contexts[i]->b_done = 0;
pp_contexts[i]->pf_func = NULL;
vlc_mutex_unlock( &pp_contexts[i]->lock );
if ( ret )
{
ret[i] = pp_contexts[i]->i_ret;
}
}
return 0;
}
/****************************************************************************
* EncodeVideo: the whole thing
****************************************************************************/
static block_t *EncodeVideo( encoder_t *p_enc, picture_t *p_pict )
{
encoder_sys_t *p_sys = p_enc->p_sys;
AVFrame frame;
int i_out, i_plane;
if ( !p_sys->b_inited && p_enc->i_threads >= 1 )
{
struct thread_context_t ** pp_contexts;
int i;
p_sys->b_inited = 1;
pp_contexts = malloc( sizeof(struct thread_context_t *)
* p_enc->i_threads );
p_sys->p_context->thread_opaque = (void *)pp_contexts;
for ( i = 0; i < p_enc->i_threads; i++ )
{
pp_contexts[i] = vlc_object_create( p_enc,
sizeof(struct thread_context_t) );
pp_contexts[i]->p_context = p_sys->p_context;
vlc_mutex_init( &pp_contexts[i]->lock );
vlc_cond_init( p_enc, &pp_contexts[i]->cond );
pp_contexts[i]->b_work = 0;
pp_contexts[i]->b_done = 0;
if ( vlc_thread_create( pp_contexts[i], "encoder", FfmpegThread,
VLC_THREAD_PRIORITY_VIDEO, false ) )
{
msg_Err( p_enc, "cannot spawn encoder thread, expect to die soon" );
return NULL;
}
}
p_sys->p_context->execute = FfmpegExecute;
}
memset( &frame, 0, sizeof( AVFrame ) );
for( i_plane = 0; i_plane < p_pict->i_planes; i_plane++ )
{
frame.data[i_plane] = p_pict->p[i_plane].p_pixels;
frame.linesize[i_plane] = p_pict->p[i_plane].i_pitch;
}
/* Let ffmpeg select the frame type */
frame.pict_type = 0;
frame.repeat_pict = p_pict->i_nb_fields - 2;
frame.interlaced_frame = !p_pict->b_progressive;
frame.top_field_first = !!p_pict->b_top_field_first;
/* Set the pts of the frame being encoded (segfaults with mpeg4!)*/
if( p_enc->fmt_out.i_codec != VLC_FOURCC( 'm', 'p', '4', 'v' ) )
{
frame.pts = p_pict->date ? p_pict->date : (int64_t)AV_NOPTS_VALUE;
if ( p_sys->b_hurry_up && frame.pts != (int64_t)AV_NOPTS_VALUE )
{
mtime_t current_date = mdate();
if ( current_date + HURRY_UP_GUARD3 > frame.pts )
{
p_sys->p_context->mb_decision = FF_MB_DECISION_SIMPLE;
p_sys->p_context->flags &= ~CODEC_FLAG_TRELLIS_QUANT;
msg_Dbg( p_enc, "hurry up mode 3" );
}
else
{
p_sys->p_context->mb_decision = p_sys->i_hq;
if ( current_date + HURRY_UP_GUARD2 > frame.pts )
{
p_sys->p_context->flags &= ~CODEC_FLAG_TRELLIS_QUANT;
p_sys->p_context->noise_reduction = p_sys->i_noise_reduction
+ (HURRY_UP_GUARD2 + current_date - frame.pts) / 500;
msg_Dbg( p_enc, "hurry up mode 2" );
}
else
{
if ( p_sys->b_trellis )
p_sys->p_context->flags |= CODEC_FLAG_TRELLIS_QUANT;
p_sys->p_context->noise_reduction =
p_sys->i_noise_reduction;
}
}
if ( current_date + HURRY_UP_GUARD1 > frame.pts )
{
frame.pict_type = FF_P_TYPE;
/* msg_Dbg( p_enc, "hurry up mode 1 %lld", current_date + HURRY_UP_GUARD1 - frame.pts ); */
}
}
}
else
{
frame.pts = (int64_t)AV_NOPTS_VALUE;
}
if ( frame.pts != (int64_t)AV_NOPTS_VALUE && frame.pts != 0 )
{
if ( p_sys->i_last_pts == frame.pts )
{
msg_Warn( p_enc, "almost fed libavcodec with two frames with the "
"same PTS (%"PRId64 ")", frame.pts );
return NULL;
}
else if ( p_sys->i_last_pts > frame.pts )
{
msg_Warn( p_enc, "almost fed libavcodec with a frame in the "
"past (current: %"PRId64 ", last: %"PRId64")",
frame.pts, p_sys->i_last_pts );
return NULL;
}
else
{
p_sys->i_last_pts = frame.pts;
}
}
frame.quality = p_sys->i_quality;
/* Ugly work-around for stupid libavcodec behaviour */
p_sys->i_framenum++;
p_sys->pi_delay_pts[p_sys->i_framenum % MAX_FRAME_DELAY] = frame.pts;
frame.pts = p_sys->i_framenum * AV_TIME_BASE *
p_enc->fmt_in.video.i_frame_rate_base;
frame.pts += p_enc->fmt_in.video.i_frame_rate - 1;
frame.pts /= p_enc->fmt_in.video.i_frame_rate;
/* End work-around */
i_out = avcodec_encode_video( p_sys->p_context, p_sys->p_buffer_out,
p_sys->i_buffer_out, &frame );
if( i_out > 0 )
{
block_t *p_block = block_New( p_enc, i_out );
memcpy( p_block->p_buffer, p_sys->p_buffer_out, i_out );
/* FIXME, 3-2 pulldown is not handled correctly */
p_block->i_length = INT64_C(1000000) *
p_enc->fmt_in.video.i_frame_rate_base /
p_enc->fmt_in.video.i_frame_rate;
if( !p_sys->p_context->max_b_frames || !p_sys->p_context->delay )
{
/* No delay -> output pts == input pts */
p_block->i_pts = p_block->i_dts = p_pict->date;
}
else if( p_sys->p_context->coded_frame->pts != (int64_t)AV_NOPTS_VALUE &&
p_sys->p_context->coded_frame->pts != 0 &&
p_sys->i_buggy_pts_detect != p_sys->p_context->coded_frame->pts )
{
p_sys->i_buggy_pts_detect = p_sys->p_context->coded_frame->pts;
p_block->i_pts = p_sys->p_context->coded_frame->pts;
/* Ugly work-around for stupid libavcodec behaviour */
{
int64_t i_framenum = p_block->i_pts *
p_enc->fmt_in.video.i_frame_rate /
p_enc->fmt_in.video.i_frame_rate_base / AV_TIME_BASE;
p_block->i_pts = p_sys->pi_delay_pts[i_framenum % MAX_FRAME_DELAY];
}
/* End work-around */
if( p_sys->p_context->coded_frame->pict_type != FF_I_TYPE &&
p_sys->p_context->coded_frame->pict_type != FF_P_TYPE )
{
p_block->i_dts = p_block->i_pts;
}
else
{
if( p_sys->i_last_ref_pts )
{
p_block->i_dts = p_sys->i_last_ref_pts;
}
else
{
/* Let's put something sensible */
p_block->i_dts = p_block->i_pts;
}
p_sys->i_last_ref_pts = p_block->i_pts;
}
}
else
{
/* Buggy libavcodec which doesn't update coded_frame->pts
* correctly */
p_block->i_dts = p_block->i_pts = p_pict->date;
}
switch ( p_sys->p_context->coded_frame->pict_type )
{
case FF_I_TYPE:
p_block->i_flags |= BLOCK_FLAG_TYPE_I;
break;
case FF_P_TYPE:
p_block->i_flags |= BLOCK_FLAG_TYPE_P;
break;
case FF_B_TYPE:
p_block->i_flags |= BLOCK_FLAG_TYPE_B;
break;
}
return p_block;
}
return NULL;
}
/****************************************************************************
* EncodeAudio: the whole thing
****************************************************************************/
static block_t *EncodeAudio( encoder_t *p_enc, aout_buffer_t *p_aout_buf )
{
encoder_sys_t *p_sys = p_enc->p_sys;
block_t *p_block, *p_chain = NULL;
uint8_t *p_buffer = p_aout_buf->p_buffer;
int i_samples = p_aout_buf->i_nb_samples;
int i_samples_delay = p_sys->i_samples_delay;
p_sys->i_pts = p_aout_buf->start_date -
(mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
(mtime_t)p_enc->fmt_in.audio.i_rate;
p_sys->i_samples_delay += i_samples;
while( p_sys->i_samples_delay >= p_sys->p_context->frame_size )
{
int16_t *p_samples;
int i_out;
if( i_samples_delay )
{
/* Take care of the left-over from last time */
int i_delay_size = i_samples_delay * 2 *
p_sys->p_context->channels;
int i_size = p_sys->i_frame_size - i_delay_size;
p_samples = (int16_t *)p_sys->p_buffer;
memcpy( p_sys->p_buffer + i_delay_size, p_buffer, i_size );
p_buffer -= i_delay_size;
i_samples += i_samples_delay;
i_samples_delay = 0;
}
else
{
p_samples = (int16_t *)p_buffer;
}
i_out = avcodec_encode_audio( p_sys->p_context, p_sys->p_buffer_out,
p_sys->i_buffer_out, p_samples );
#if 0
msg_Warn( p_enc, "avcodec_encode_audio: %d", i_out );
#endif
if( i_out < 0 ) break;
p_buffer += p_sys->i_frame_size;
p_sys->i_samples_delay -= p_sys->p_context->frame_size;
i_samples -= p_sys->p_context->frame_size;
if( i_out == 0 ) continue;
p_block = block_New( p_enc, i_out );
memcpy( p_block->p_buffer, p_sys->p_buffer_out, i_out );
p_block->i_length = (mtime_t)1000000 *
(mtime_t)p_sys->p_context->frame_size /
(mtime_t)p_sys->p_context->sample_rate;
p_block->i_dts = p_block->i_pts = p_sys->i_pts;
/* Update pts */
p_sys->i_pts += p_block->i_length;
block_ChainAppend( &p_chain, p_block );
}
/* Backup the remaining raw samples */
if( i_samples )
{
memcpy( p_sys->p_buffer + i_samples_delay * 2 *
p_sys->p_context->channels, p_buffer,
i_samples * 2 * p_sys->p_context->channels );
}
return p_chain;
}
/*****************************************************************************
* CloseEncoder: ffmpeg encoder destruction
*****************************************************************************/
void CloseEncoder( vlc_object_t *p_this )
{
encoder_t *p_enc = (encoder_t *)p_this;
encoder_sys_t *p_sys = p_enc->p_sys;
if ( p_sys->b_inited && p_enc->i_threads >= 1 )
{
int i;
struct thread_context_t ** pp_contexts =
(struct thread_context_t **)p_sys->p_context->thread_opaque;
for ( i = 0; i < p_enc->i_threads; i++ )
{
vlc_object_kill( pp_contexts[i] );
vlc_cond_signal( &pp_contexts[i]->cond );
vlc_thread_join( pp_contexts[i] );
vlc_mutex_destroy( &pp_contexts[i]->lock );
vlc_cond_destroy( &pp_contexts[i]->cond );
vlc_object_release( pp_contexts[i] );
}
free( pp_contexts );
}
vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
avcodec_close( p_sys->p_context );
vlc_mutex_unlock( lock );
av_free( p_sys->p_context );
free( p_sys->p_buffer );
free( p_sys->p_buffer_out );
free( p_sys );
}