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vlc/modules/stream_out/transcode.c
Laurent Aimar e60df5e403 * transcode.c: removed an absolute header path...
2003-04-14 03:13:30 +00:00

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/*****************************************************************************
* transcode.c
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
* $Id: transcode.c,v 1.2 2003/04/14 03:13:30 fenrir Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <vlc/vlc.h>
#include <vlc/input.h>
#include <vlc/sout.h>
#include <avcodec.h>
/*****************************************************************************
* Exported prototypes
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
static sout_stream_id_t *Add ( sout_stream_t *, sout_format_t * );
static int Del ( sout_stream_t *, sout_stream_id_t * );
static int Send( sout_stream_t *, sout_stream_id_t *, sout_buffer_t* );
static int transcode_audio_ffmpeg_new ( sout_stream_t *, sout_stream_id_t * );
static void transcode_audio_ffmpeg_close ( sout_stream_t *, sout_stream_id_t * );
static int transcode_audio_ffmpeg_process( sout_stream_t *, sout_stream_id_t *, sout_buffer_t *, sout_buffer_t ** );
static int transcode_video_ffmpeg_new ( sout_stream_t *, sout_stream_id_t * );
static void transcode_video_ffmpeg_close ( sout_stream_t *, sout_stream_id_t * );
static int transcode_video_ffmpeg_process( sout_stream_t *, sout_stream_id_t *, sout_buffer_t *, sout_buffer_t ** );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_description( _("Transcode stream") );
set_capability( "sout stream", 50 );
add_shortcut( "transcode" );
set_callbacks( Open, Close );
vlc_module_end();
struct sout_stream_sys_t
{
sout_stream_t *p_out;
vlc_fourcc_t i_acodec; // codec audio (0 if not transcode)
int i_sample_rate;
int i_channels;
int i_abitrate;
vlc_fourcc_t i_vcodec; // " video " " " "
int i_vbitrate;
int i_width;
int i_height;
vlc_bool_t b_deinterlace;
int i_crop_top;
int i_crop_bottom;
int i_crop_right;
int i_crop_left;
};
/*****************************************************************************
* Open:
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
sout_stream_t *p_stream = (sout_stream_t*)p_this;
sout_stream_sys_t *p_sys;
char *codec;
p_sys = malloc( sizeof( sout_stream_sys_t ) );
p_sys->p_out = sout_stream_new( p_stream->p_sout, p_stream->psz_next );
p_sys->i_acodec = 0;
p_sys->i_sample_rate = 0;
p_sys->i_channels = 0;
p_sys->i_abitrate = 0;
p_sys->i_vcodec = 0;
p_sys->i_vbitrate = 0;
p_sys->i_width = 0;
p_sys->i_height = 0;
p_sys->b_deinterlace= VLC_FALSE;
p_sys->i_crop_top = 0;
p_sys->i_crop_bottom= 0;
p_sys->i_crop_right = 0;
p_sys->i_crop_left = 0;
if( ( codec = sout_cfg_find_value( p_stream->p_cfg, "acodec" ) ) )
{
char fcc[4] = " ";
char *val;
memcpy( fcc, codec, strlen( codec ) );
p_sys->i_acodec = VLC_FOURCC( fcc[0], fcc[1], fcc[2], fcc[3] );
if( ( val = sout_cfg_find_value( p_stream->p_cfg, "samplerate" ) ) )
{
p_sys->i_sample_rate = atoi( val );
}
if( ( val = sout_cfg_find_value( p_stream->p_cfg, "channels" ) ) )
{
p_sys->i_channels = atoi( val );
}
if( ( val = sout_cfg_find_value( p_stream->p_cfg, "ab" ) ) )
{
p_sys->i_abitrate = atoi( val );
}
msg_Dbg( p_stream, "codec audio=%4.4s %dHz %d channels %dKb/s",
fcc,
p_sys->i_sample_rate, p_sys->i_channels,
p_sys->i_abitrate / 1024 );
}
if( ( codec = sout_cfg_find_value( p_stream->p_cfg, "vcodec" ) ) )
{
char fcc[4] = " ";
char *val;
memcpy( fcc, codec, strlen( codec ) );
p_sys->i_vcodec = VLC_FOURCC( fcc[0], fcc[1], fcc[2], fcc[3] );
if( ( val = sout_cfg_find_value( p_stream->p_cfg, "width" ) ) )
{
p_sys->i_width = atoi( val );
}
if( ( val = sout_cfg_find_value( p_stream->p_cfg, "height" ) ) )
{
p_sys->i_height = atoi( val );
}
if( ( val = sout_cfg_find_value( p_stream->p_cfg, "vb" ) ) )
{
p_sys->i_vbitrate = atoi( val );
}
if( sout_cfg_find( p_stream->p_cfg, "deinterlace" ) )
{
p_sys->b_deinterlace = VLC_TRUE;
}
/* crop */
if( ( val = sout_cfg_find_value( p_stream->p_cfg, "croptop" ) ) )
{
p_sys->i_crop_top = atoi( val );
}
if( ( val = sout_cfg_find_value( p_stream->p_cfg, "cropbottom" ) ) )
{
p_sys->i_crop_bottom = atoi( val );
}
if( ( val = sout_cfg_find_value( p_stream->p_cfg, "cropleft" ) ) )
{
p_sys->i_crop_left = atoi( val );
}
if( ( val = sout_cfg_find_value( p_stream->p_cfg, "cropright" ) ) )
{
p_sys->i_crop_right = atoi( val );
}
msg_Dbg( p_stream, "codec video=%4.4s %dx%d %dkb/s",
fcc,
p_sys->i_width, p_sys->i_height,
p_sys->i_vbitrate / 1024 );
}
if( !p_sys->p_out )
{
msg_Err( p_stream, "cannot create chain" );
free( p_sys );
return VLC_EGENERIC;
}
p_stream->pf_add = Add;
p_stream->pf_del = Del;
p_stream->pf_send = Send;
p_stream->p_sys = p_sys;
avcodec_init();
avcodec_register_all();
return VLC_SUCCESS;
}
/*****************************************************************************
* Close:
*****************************************************************************/
static void Close( vlc_object_t * p_this )
{
sout_stream_t *p_stream = (sout_stream_t*)p_this;
sout_stream_sys_t *p_sys = p_stream->p_sys;
sout_stream_delete( p_sys->p_out );
free( p_sys );
}
struct sout_stream_id_t
{
vlc_fourcc_t b_transcode;
sout_format_t f_src; // only if transcoding
sout_format_t f_dst; // " " "
/* id of the out stream */
void *id;
/* ffmpeg part */
AVCodec *ff_dec;
AVCodecContext *ff_dec_c;
vlc_fourcc_t b_enc_inited;
AVCodec *ff_enc;
AVCodecContext *ff_enc_c;
mtime_t i_dts;
mtime_t i_length;
int i_buffer_in;
int i_buffer_in_pos;
uint8_t *p_buffer_in;
int i_buffer;
int i_buffer_pos;
uint8_t *p_buffer;
int i_buffer_out;
int i_buffer_out_pos;
uint8_t *p_buffer_out;
AVFrame *p_ff_pic;
AVFrame *p_ff_pic_tmp0; // to do deinterlace
AVFrame *p_ff_pic_tmp1; // to do pix conversion
AVFrame *p_ff_pic_tmp2; // to do resample
ImgReSampleContext *p_vresample;
};
static sout_stream_id_t * Add ( sout_stream_t *p_stream, sout_format_t *p_fmt )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
sout_stream_id_t *id;
id = malloc( sizeof( sout_stream_id_t ) );
id->i_dts = 0;
if( p_fmt->i_cat == AUDIO_ES && p_sys->i_acodec != 0 )
{
msg_Dbg( p_stream,
"creating audio transcoding from fcc=`%4.4s' to fcc=`%4.4s'",
(char*)&p_fmt->i_fourcc,
(char*)&p_sys->i_acodec );
/* src format */
memcpy( &id->f_src, p_fmt, sizeof( sout_format_t ) );
/* create dst format */
id->f_dst.i_cat = AUDIO_ES;
id->f_dst.i_fourcc = p_sys->i_acodec;
id->f_dst.i_sample_rate = p_sys->i_sample_rate > 0 ? p_sys->i_sample_rate : id->f_src.i_sample_rate;
id->f_dst.i_channels = p_sys->i_channels > 0 ? p_sys->i_channels : id->f_src.i_channels;
id->f_dst.i_bitrate = p_sys->i_abitrate > 0 ? p_sys->i_abitrate : 64000;
id->f_dst.i_block_align = 0;
id->f_dst.i_extra_data = 0;
id->f_dst.p_extra_data = NULL;
/* build decoder -> filter -> encoder */
if( transcode_audio_ffmpeg_new( p_stream, id ) )
{
msg_Err( p_stream, "cannot create audio chain" );
free( id );
return NULL;
}
/* open output stream */
id->id = p_sys->p_out->pf_add( p_sys->p_out, &id->f_dst );
id->b_transcode = VLC_TRUE;
}
else if( p_fmt->i_cat == VIDEO_ES && p_sys->i_vcodec != 0 )
{
msg_Dbg( p_stream,
"creating video transcoding from fcc=`%4.4s' to fcc=`%4.4s'",
(char*)&p_fmt->i_fourcc,
(char*)&p_sys->i_vcodec );
memcpy( &id->f_src, p_fmt, sizeof( sout_format_t ) );
/* create dst format */
id->f_dst.i_cat = VIDEO_ES;
id->f_dst.i_fourcc = p_sys->i_vcodec;
id->f_dst.i_width = p_sys->i_width ; //> 0 ? p_sys->i_width : id->f_src.i_width;
id->f_dst.i_height = p_sys->i_height; // > 0 ? p_sys->i_height: id->f_src.i_height;
id->f_dst.i_bitrate = p_sys->i_vbitrate > 0 ? p_sys->i_vbitrate : 800*1000;
id->f_dst.i_extra_data = 0;
id->f_dst.p_extra_data = NULL;
/* build decoder -> filter -> encoder */
if( transcode_video_ffmpeg_new( p_stream, id ) )
{
msg_Err( p_stream, "cannot create video chain" );
free( id );
return NULL;
}
/* open output stream */
id->id = p_sys->p_out->pf_add( p_sys->p_out, &id->f_dst );
id->b_transcode = VLC_TRUE;
}
else
{
msg_Dbg( p_stream, "not transcoding a stream (fcc=`%4.4s')", (char*)&p_fmt->i_fourcc );
id->id = p_sys->p_out->pf_add( p_sys->p_out, p_fmt );
id->b_transcode = VLC_FALSE;
if( id->id == NULL )
{
free( id );
return NULL;
}
}
return id;
}
static int Del ( sout_stream_t *p_stream, sout_stream_id_t *id )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
if( id->b_transcode )
{
if( id->f_src.i_cat == AUDIO_ES )
{
transcode_audio_ffmpeg_close( p_stream, id );
}
else if( id->f_src.i_cat == VIDEO_ES )
{
transcode_video_ffmpeg_close( p_stream, id );
}
}
p_sys->p_out->pf_del( p_sys->p_out, id->id );
free( id );
return VLC_SUCCESS;
}
static int Send ( sout_stream_t *p_stream, sout_stream_id_t *id, sout_buffer_t *p_buffer )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
if( id->b_transcode )
{
sout_buffer_t *p_buffer_out;
if( id->f_src.i_cat == AUDIO_ES )
{
transcode_audio_ffmpeg_process( p_stream, id, p_buffer, &p_buffer_out );
}
else if( id->f_src.i_cat == VIDEO_ES )
{
transcode_video_ffmpeg_process( p_stream, id, p_buffer, &p_buffer_out );
}
sout_BufferDelete( p_stream->p_sout, p_buffer );
if( p_buffer_out )
{
return p_sys->p_out->pf_send( p_sys->p_out, id->id, p_buffer_out );
}
return VLC_SUCCESS;
}
else
{
return p_sys->p_out->pf_send( p_sys->p_out, id->id, p_buffer );
}
}
/****************************************************************************
* ffmpeg decoder reencocdr part
****************************************************************************/
static struct
{
vlc_fourcc_t i_fcc;
int i_ff_codec;
} fourcc_to_ff_code[] =
{
/* audio */
{ VLC_FOURCC( 'm', 'p', 'g', 'a' ), CODEC_ID_MP2 },
{ VLC_FOURCC( 'a', '5', '2', ' ' ), CODEC_ID_AC3 },
{ VLC_FOURCC( 'a', 'c', '3', ' ' ), CODEC_ID_AC3 },
{ VLC_FOURCC( 'w', 'm', 'a', '1' ), CODEC_ID_WMAV1 },
{ VLC_FOURCC( 'w', 'm', 'a', '2' ), CODEC_ID_WMAV2 },
/* video */
{ VLC_FOURCC( 'm', 'p', '4', 'v'), CODEC_ID_MPEG4 },
{ VLC_FOURCC( 'm', 'p', 'g', 'v' ), CODEC_ID_MPEG1VIDEO },
{ VLC_FOURCC( 'D', 'I', 'V', '1' ), CODEC_ID_MSMPEG4V1 },
{ VLC_FOURCC( 'D', 'I', 'V', '2' ), CODEC_ID_MSMPEG4V2 },
{ VLC_FOURCC( 'D', 'I', 'V', '3' ), CODEC_ID_MSMPEG4V3 },
{ VLC_FOURCC( 'H', '2', '6', '3' ), CODEC_ID_H263 },
{ VLC_FOURCC( 'I', '2', '6', '3' ), CODEC_ID_H263I },
{ VLC_FOURCC( 'W', 'M', 'V', '1' ), CODEC_ID_WMV1 },
{ VLC_FOURCC( 'W', 'M', 'V', '2' ), CODEC_ID_WMV2 },
{ VLC_FOURCC( 'M', 'J', 'P', 'G' ), CODEC_ID_MJPEG },
{ VLC_FOURCC( 'm', 'j', 'p', 'b' ), CODEC_ID_MJPEGB },
{ VLC_FOURCC( 'd', 'v', 's', 'l' ), CODEC_ID_DVVIDEO },
{ VLC_FOURCC( 'S', 'V', 'Q', '1' ), CODEC_ID_SVQ1 },
{ VLC_FOURCC( 0, 0, 0, 0 ), 0 }
};
static inline int get_ff_codec( vlc_fourcc_t i_fcc )
{
int i;
for( i = 0; fourcc_to_ff_code[i].i_fcc != 0; i++ )
{
if( fourcc_to_ff_code[i].i_fcc == i_fcc )
{
return fourcc_to_ff_code[i].i_ff_codec;
}
}
return 0;
}
static int transcode_audio_ffmpeg_new ( sout_stream_t *p_stream, sout_stream_id_t *id )
{
int i_ff_codec;
/* find decoder */
i_ff_codec = get_ff_codec( id->f_src.i_fourcc );
if( i_ff_codec == 0 )
{
msg_Err( p_stream, "cannot find decoder" );
return VLC_EGENERIC;
}
id->ff_dec = avcodec_find_decoder( i_ff_codec );
if( !id->ff_dec )
{
msg_Err( p_stream, "cannot find decoder" );
return VLC_EGENERIC;
}
id->ff_dec_c = avcodec_alloc_context();
id->ff_dec_c->sample_rate = id->f_src.i_sample_rate;
id->ff_dec_c->channels = id->f_src.i_channels;
id->ff_dec_c->block_align = id->f_src.i_block_align;
id->ff_dec_c->bit_rate = id->f_src.i_bitrate;
id->ff_dec_c->extradata_size = id->f_src.i_extra_data;
id->ff_dec_c->extradata = id->f_src.p_extra_data;
if( avcodec_open( id->ff_dec_c, id->ff_dec ) )
{
msg_Err( p_stream, "cannot open decoder" );
return VLC_EGENERIC;
}
/* find encoder */
i_ff_codec = get_ff_codec( id->f_dst.i_fourcc );
if( i_ff_codec == 0 )
{
msg_Err( p_stream, "cannot find encoder" );
return VLC_EGENERIC;
}
id->ff_enc = avcodec_find_encoder( i_ff_codec );
if( !id->ff_enc )
{
msg_Err( p_stream, "cannot find encoder" );
return VLC_EGENERIC;
}
id->ff_enc_c = avcodec_alloc_context();
id->ff_enc_c->bit_rate = id->f_dst.i_bitrate;
id->ff_enc_c->sample_rate = id->f_dst.i_sample_rate;
id->ff_enc_c->channels = id->f_dst.i_channels;
if( avcodec_open( id->ff_enc_c, id->ff_enc ) )
{
msg_Err( p_stream, "cannot open encoder" );
return VLC_EGENERIC;
}
id->i_buffer_in = AVCODEC_MAX_AUDIO_FRAME_SIZE;
id->i_buffer_in_pos = 0;
id->p_buffer_in = malloc( id->i_buffer_in );
id->i_buffer = AVCODEC_MAX_AUDIO_FRAME_SIZE;
id->i_buffer_pos = 0;
id->p_buffer = malloc( id->i_buffer );
id->i_buffer_out = AVCODEC_MAX_AUDIO_FRAME_SIZE;
id->i_buffer_out_pos = 0;
id->p_buffer_out = malloc( id->i_buffer_out );
return VLC_SUCCESS;
}
static void transcode_audio_ffmpeg_close ( sout_stream_t *p_stream, sout_stream_id_t *id )
{
avcodec_close( id->ff_dec_c );
avcodec_close( id->ff_enc_c );
free( id->ff_dec_c );
free( id->ff_enc_c );
free( id->p_buffer );
}
static int transcode_audio_ffmpeg_process( sout_stream_t *p_stream, sout_stream_id_t *id,
sout_buffer_t *in, sout_buffer_t **out )
{
*out = NULL;
/* gather data into p_buffer_in */
id->i_dts = in->i_dts -
(mtime_t)1000000 *
(mtime_t)(id->i_buffer_pos / 2 / id->ff_enc_c->channels )/
(mtime_t)id->ff_enc_c->sample_rate;
memcpy( &id->p_buffer_in[id->i_buffer_in_pos],
in->p_buffer,
in->i_size );
id->i_buffer_in_pos += in->i_size;
/* decode as many data as possible */
for( ;; )
{
int i_buffer_size;
int i_used;
i_buffer_size = id->i_buffer - id->i_buffer_pos;
i_used = avcodec_decode_audio( id->ff_dec_c,
(int16_t*)&id->p_buffer[id->i_buffer_pos], &i_buffer_size,
id->p_buffer_in, id->i_buffer_in_pos );
//msg_Warn( p_stream, "avcodec_decode_audio: %d used", i_used );
id->i_buffer_pos += i_buffer_size;
if( i_used < 0 )
{
msg_Warn( p_stream, "error");
id->i_buffer_in_pos = 0;
break;
}
else if( i_used < id->i_buffer_in_pos )
{
memmove( id->p_buffer_in,
&id->p_buffer_in[i_used],
id->i_buffer_in - i_used );
id->i_buffer_in_pos -= i_used;
}
else
{
id->i_buffer_in_pos = 0;
break;
}
}
/* encode as many data as possible */
for( ;; )
{
int i_frame_size = id->ff_enc_c->frame_size * 2 * id->ff_enc_c->channels;
int i_out_size;
sout_buffer_t *p_out;
if( id->i_buffer_pos < i_frame_size )
{
break;
}
//msg_Warn( p_stream, "avcodec_encode_audio: frame size%d", i_frame_size);
i_out_size = avcodec_encode_audio( id->ff_enc_c,
id->p_buffer_out, id->i_buffer_out,
(int16_t*)id->p_buffer );
if( i_out_size <= 0 )
{
break;
}
memmove( id->p_buffer,
&id->p_buffer[i_frame_size],
id->i_buffer - i_frame_size );
id->i_buffer_pos -= i_frame_size;
p_out = sout_BufferNew( p_stream->p_sout, i_out_size );
memcpy( p_out->p_buffer, id->p_buffer_out, i_out_size );
p_out->i_size = i_out_size;
p_out->i_length = (mtime_t)1000000 * (mtime_t)id->ff_enc_c->frame_size / (mtime_t)id->ff_enc_c->sample_rate;
/* FIXME */
p_out->i_dts = id->i_dts;
p_out->i_pts = id->i_dts;
/* update dts */
id->i_dts += p_out->i_length;
//msg_Warn( p_stream, "frame dts=%lld len %lld out=%d", p_out->i_dts, p_out->i_length, i_out_size );
sout_BufferChain( out, p_out );
}
return VLC_SUCCESS;
}
/*
* video
*/
static int transcode_video_ffmpeg_new ( sout_stream_t *p_stream, sout_stream_id_t *id )
{
int i_ff_codec;
/* find decoder */
i_ff_codec = get_ff_codec( id->f_src.i_fourcc );
if( i_ff_codec == 0 )
{
msg_Err( p_stream, "cannot find decoder" );
return VLC_EGENERIC;
}
id->ff_dec = avcodec_find_decoder( i_ff_codec );
if( !id->ff_dec )
{
msg_Err( p_stream, "cannot find decoder" );
return VLC_EGENERIC;
}
id->ff_dec_c = avcodec_alloc_context();
id->ff_dec_c->width = id->f_src.i_width;
id->ff_dec_c->height = id->f_src.i_height;
//id->ff_dec_c->bit_rate = id->f_src.i_bitrate;
id->ff_dec_c->extradata_size= id->f_src.i_extra_data;
id->ff_dec_c->extradata = id->f_src.p_extra_data;
id->ff_dec_c->workaround_bugs = FF_BUG_AUTODETECT;
id->ff_dec_c->error_resilience= -1;
if( id->ff_dec->capabilities & CODEC_CAP_TRUNCATED )
{
id->ff_dec_c->flags |= CODEC_FLAG_TRUNCATED;
}
if( avcodec_open( id->ff_dec_c, id->ff_dec ) < 0 )
{
msg_Err( p_stream, "cannot open decoder" );
return VLC_EGENERIC;
}
#if 1
if( i_ff_codec == CODEC_ID_MPEG4 && id->ff_dec_c->extradata_size > 0 )
{
int b_gotpicture;
AVFrame frame;
avcodec_decode_video( id->ff_dec_c, &frame,
&b_gotpicture,
id->ff_dec_c->extradata, id->ff_dec_c->extradata_size );
}
#endif
/* find encoder */
i_ff_codec = get_ff_codec( id->f_dst.i_fourcc );
if( i_ff_codec == 0 )
{
msg_Err( p_stream, "cannot find encoder" );
return VLC_EGENERIC;
}
id->ff_enc = avcodec_find_encoder( i_ff_codec );
if( !id->ff_enc )
{
msg_Err( p_stream, "cannot find encoder" );
return VLC_EGENERIC;
}
id->ff_enc_c = avcodec_alloc_context();
id->ff_enc_c->width = id->f_dst.i_width;
id->ff_enc_c->height = id->f_dst.i_height;
id->ff_enc_c->bit_rate = id->f_dst.i_bitrate;
id->ff_enc_c->frame_rate = 25 ; // FIXME as it break mpeg
id->ff_enc_c->frame_rate_base= 1;
id->ff_enc_c->gop_size = 25;
id->ff_enc_c->qmin = 2;
id->ff_enc_c->qmax = 31;
#if 0
/* XXX open it when we have the first frame */
if( avcodec_open( id->ff_enc_c, id->ff_enc ) )
{
msg_Err( p_stream, "cannot open encoder" );
return VLC_EGENERIC;
}
#endif
id->b_enc_inited = VLC_FALSE;
id->i_buffer_in = 0;
id->i_buffer_in_pos = 0;
id->p_buffer_in = NULL;
id->i_buffer = 3*1024*1024;
id->i_buffer_pos = 0;
id->p_buffer = malloc( id->i_buffer );
id->i_buffer_out = 0;
id->i_buffer_out_pos = 0;
id->p_buffer_out = NULL;
id->p_ff_pic = avcodec_alloc_frame();
id->p_ff_pic_tmp0 = NULL;
id->p_ff_pic_tmp1 = NULL;
id->p_ff_pic_tmp2 = NULL;
id->p_vresample = NULL;
return VLC_SUCCESS;
}
static void transcode_video_ffmpeg_close ( sout_stream_t *p_stream, sout_stream_id_t *id )
{
avcodec_close( id->ff_dec_c );
if( id->b_enc_inited )
{
avcodec_close( id->ff_enc_c );
}
if( id->p_ff_pic)
{
free( id->p_ff_pic );
}
if( id->p_ff_pic_tmp0 )
{
free( id->p_ff_pic_tmp0->data[0] );
free( id->p_ff_pic_tmp0 );
}
if( id->p_ff_pic_tmp1)
{
free( id->p_ff_pic_tmp1->data[0] );
free( id->p_ff_pic_tmp1 );
}
if( id->p_ff_pic_tmp2)
{
free( id->p_ff_pic_tmp2->data[0] );
free( id->p_ff_pic_tmp2 );
}
if( id->p_vresample )
{
free( id->p_vresample );
}
free( id->ff_dec_c );
free( id->ff_enc_c );
free( id->p_buffer );
}
static int transcode_video_ffmpeg_process( sout_stream_t *p_stream, sout_stream_id_t *id,
sout_buffer_t *in, sout_buffer_t **out )
{
int i_used;
int i_out;
int b_gotpicture;
AVFrame *frame;
int i_data;
uint8_t *p_data;
*out = NULL;
i_data = in->i_size;
p_data = in->p_buffer;
for( ;; )
{
/* decode frame */
frame = id->p_ff_pic;
i_used = avcodec_decode_video( id->ff_dec_c, frame,
&b_gotpicture,
p_data, i_data );
if( i_used < 0 )
{
msg_Warn( p_stream, "error");
return VLC_EGENERIC;
}
i_data -= i_used;
p_data += i_used;
if( !b_gotpicture )
{
return VLC_SUCCESS;
}
if( !id->b_enc_inited )
{
/* XXX hack because of copy packetizer and mpeg4video that can failed
detecting size */
if( id->ff_enc_c->width == 0 || id->ff_enc_c->height == 0 )
{
id->ff_enc_c->width = id->ff_dec_c->width;
id->ff_enc_c->height = id->ff_dec_c->height;
}
if( avcodec_open( id->ff_enc_c, id->ff_enc ) )
{
msg_Err( p_stream, "cannot open encoder" );
return VLC_EGENERIC;
}
id->b_enc_inited = VLC_TRUE;
}
/* deinterlace */
if( p_stream->p_sys->b_deinterlace )
{
if( id->p_ff_pic_tmp0 == NULL )
{
int i_size;
uint8_t *buf;
id->p_ff_pic_tmp0 = avcodec_alloc_frame();
i_size = avpicture_get_size( id->ff_dec_c->pix_fmt,
id->ff_dec_c->width, id->ff_dec_c->height );
buf = malloc( i_size );
avpicture_fill( (AVPicture*)id->p_ff_pic_tmp0, buf,
id->ff_enc_c->pix_fmt,
id->ff_dec_c->width, id->ff_dec_c->height );
}
avpicture_deinterlace( (AVPicture*)id->p_ff_pic_tmp0, (AVPicture*)frame,
id->ff_dec_c->pix_fmt,
id->ff_dec_c->width, id->ff_dec_c->height );
frame = id->p_ff_pic_tmp0;
}
/* convert pix format */
if( id->ff_dec_c->pix_fmt != id->ff_enc_c->pix_fmt )
{
if( id->p_ff_pic_tmp1 == NULL )
{
int i_size;
uint8_t *buf;
id->p_ff_pic_tmp1 = avcodec_alloc_frame();
i_size = avpicture_get_size( id->ff_enc_c->pix_fmt,
id->ff_dec_c->width, id->ff_dec_c->height );
buf = malloc( i_size );
avpicture_fill( (AVPicture*)id->p_ff_pic_tmp1, buf,
id->ff_enc_c->pix_fmt,
id->ff_dec_c->width, id->ff_dec_c->height );
}
img_convert( (AVPicture*)id->p_ff_pic_tmp1, id->ff_enc_c->pix_fmt,
(AVPicture*)frame, id->ff_dec_c->pix_fmt,
id->ff_dec_c->width, id->ff_dec_c->height );
frame = id->p_ff_pic_tmp1;
}
/* convert size and crop */
if( ( id->ff_dec_c->width != id->ff_enc_c->width ) ||
( id->ff_dec_c->height != id->ff_enc_c->height ) )
{
if( id->p_ff_pic_tmp2 == NULL )
{
int i_size;
uint8_t *buf;
id->p_ff_pic_tmp2 = avcodec_alloc_frame();
i_size = avpicture_get_size( id->ff_enc_c->pix_fmt,
id->ff_enc_c->width, id->ff_enc_c->height );
buf = malloc( i_size );
avpicture_fill( (AVPicture*)id->p_ff_pic_tmp2, buf,
id->ff_enc_c->pix_fmt,
id->ff_enc_c->width, id->ff_enc_c->height );
id->p_vresample =
img_resample_full_init( id->ff_enc_c->width, id->ff_enc_c->height,
id->ff_dec_c->width, id->ff_dec_c->height,
p_stream->p_sys->i_crop_top,
p_stream->p_sys->i_crop_bottom,
p_stream->p_sys->i_crop_left,
p_stream->p_sys->i_crop_right );
}
img_resample( id->p_vresample, (AVPicture*)id->p_ff_pic_tmp2, (AVPicture*)frame );
frame = id->p_ff_pic_tmp2;
}
/* encode frame */
i_out = avcodec_encode_video( id->ff_enc_c, id->p_buffer, id->i_buffer, frame );
if( i_out > 0 )
{
sout_buffer_t *p_out;
p_out = sout_BufferNew( p_stream->p_sout, i_out );
memcpy( p_out->p_buffer, id->p_buffer, i_out );
p_out->i_size = i_out;
p_out->i_length = in->i_length;
p_out->i_dts = in->i_dts;
p_out->i_pts = in->i_dts; /* FIXME */
sout_BufferChain( out, p_out );
}
if( i_data <= 0 )
{
return VLC_SUCCESS;
}
}
return VLC_SUCCESS;
}
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