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vlc/modules/stream_out/switcher.c

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/*****************************************************************************
* switcher.c: MPEG2 video switcher module
*****************************************************************************
* Copyright (C) 2004 the VideoLAN team
* $Id$
*
* Authors: Christophe Massiot <massiot@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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <math.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_sout.h>
#include <vlc_avcodec.h>
#include <vlc_filter.h>
#include <vlc_cpu.h>
#include <vlc_block.h>
#include <vlc_fs.h>
#include <vlc_network.h>
#define HAVE_MMX
#ifdef HAVE_LIBAVCODEC_AVCODEC_H
# include <libavcodec/avcodec.h>
#elif defined(HAVE_FFMPEG_AVCODEC_H)
# include <ffmpeg/avcodec.h>
#else
# include <avcodec.h>
#endif
#ifdef HAVE_POSTPROC_POSTPROCESS_H
# include <postproc/postprocess.h>
#else
# include <libpostproc/postprocess.h>
#endif
#define SOUT_CFG_PREFIX "sout-switcher-"
#define MAX_PICTURES 10
#define MAX_AUDIO 30
#define MAX_THRESHOLD 99999999
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
static sout_stream_id_t *Add( sout_stream_t *, es_format_t * );
static int Del( sout_stream_t *, sout_stream_id_t * );
static int Send( sout_stream_t *, sout_stream_id_t *, block_t * );
static mtime_t Process( sout_stream_t *p_stream, sout_stream_id_t *id,
mtime_t i_max_dts );
static int UnpackFromFile( sout_stream_t *p_stream, const char *psz_file,
int i_width, int i_height,
picture_t *p_pic );
static void NetCommand( sout_stream_t *p_stream );
static mtime_t VideoCommand( sout_stream_t *p_stream, sout_stream_id_t *id );
static block_t *VideoGetBuffer( sout_stream_t *p_stream, sout_stream_id_t *id,
block_t *p_buffer );
static block_t *AudioGetBuffer( sout_stream_t *p_stream, sout_stream_id_t *id,
block_t *p_buffer );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define FILES_TEXT N_("Files")
#define FILES_LONGTEXT N_( \
"Full paths of the files separated by colons." )
#define SIZES_TEXT N_("Sizes")
#define SIZES_LONGTEXT N_( \
"List of sizes separated by colons (720x576:480x576)." )
#define RATIO_TEXT N_("Aspect ratio")
#define RATIO_LONGTEXT N_( \
"Aspect ratio (4:3, 16:9)." )
#define PORT_TEXT N_("Command UDP port")
#define PORT_LONGTEXT N_( \
"UDP port to listen to for commands." )
#define COMMAND_TEXT N_("Command")
#define COMMAND_LONGTEXT N_( \
"Initial command to execute." )
#define GOP_TEXT N_("GOP size")
#define GOP_LONGTEXT N_( \
"Number of P frames between two I frames." )
#define QSCALE_TEXT N_("Quantizer scale")
#define QSCALE_LONGTEXT N_( \
"Fixed quantizer scale to use." )
#define AUDIO_TEXT N_("Mute audio")
#define AUDIO_LONGTEXT N_( \
"Mute audio when command is not 0." )
vlc_module_begin ()
set_description( N_("MPEG2 video switcher stream output") )
set_capability( "sout stream", 50 )
add_shortcut( "switcher" )
set_callbacks( Open, Close )
add_string( SOUT_CFG_PREFIX "files", "", NULL, FILES_TEXT,
FILES_LONGTEXT, false )
add_string( SOUT_CFG_PREFIX "sizes", "", NULL, SIZES_TEXT,
SIZES_LONGTEXT, false )
add_string( SOUT_CFG_PREFIX "aspect-ratio", "4:3", NULL, RATIO_TEXT,
RATIO_LONGTEXT, false )
add_integer( SOUT_CFG_PREFIX "port", 5001, NULL,
PORT_TEXT, PORT_LONGTEXT, true )
add_integer( SOUT_CFG_PREFIX "command", 0, NULL,
COMMAND_TEXT, COMMAND_LONGTEXT, true )
add_integer( SOUT_CFG_PREFIX "gop", 8, NULL,
GOP_TEXT, GOP_LONGTEXT, true )
add_integer( SOUT_CFG_PREFIX "qscale", 5, NULL,
QSCALE_TEXT, QSCALE_LONGTEXT, true )
add_bool( SOUT_CFG_PREFIX "mute-audio", true, NULL,
AUDIO_TEXT, AUDIO_LONGTEXT, true )
vlc_module_end ()
static const char *const ppsz_sout_options[] = {
"files", "sizes", "aspect-ratio", "port", "command", "gop", "qscale",
"mute-audio", NULL
};
struct sout_stream_sys_t
{
int i_gop;
int i_qscale;
int i_aspect;
sout_stream_id_t *pp_audio_ids[MAX_AUDIO];
bool b_audio;
/* Pictures */
picture_t p_pictures[MAX_PICTURES];
int i_nb_pictures;
/* Command */
int i_fd;
int i_cmd, i_old_cmd;
};
struct sout_stream_id_t
{
void *id;
bool b_switcher_video;
bool b_switcher_audio;
es_format_t f_src;
block_t *p_queued;
/* ffmpeg part */
AVCodec *ff_enc;
AVCodecContext *ff_enc_c;
AVFrame *p_frame;
uint8_t *p_buffer_out;
int i_nb_pred;
int16_t *p_samples;
};
/*****************************************************************************
* 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;
vlc_value_t val;
char *psz_files, *psz_sizes;
int i_height = 0, i_width = 0;
p_sys = calloc( 1, sizeof(sout_stream_sys_t) );
if( !p_sys )
return VLC_ENOMEM;
if( !p_stream->p_next )
{
msg_Err( p_stream, "cannot create chain" );
free( p_sys );
return VLC_EGENERIC;
}
config_ChainParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options,
p_stream->p_cfg );
var_Get( p_stream, SOUT_CFG_PREFIX "files", &val );
psz_files = val.psz_string;
var_Get( p_stream, SOUT_CFG_PREFIX "sizes", &val );
psz_sizes = val.psz_string;
p_sys->i_nb_pictures = 0;
while ( psz_files && *psz_files )
{
char * psz_file = psz_files;
char * psz_size = psz_sizes;
while ( *psz_files && *psz_files != ':' )
psz_files++;
if ( *psz_files == ':' )
*psz_files++ = '\0';
if ( *psz_sizes )
{
while ( *psz_sizes && *psz_sizes != ':' )
psz_sizes++;
if ( *psz_sizes == ':' )
*psz_sizes++ = '\0';
if ( sscanf( psz_size, "%dx%d", &i_width, &i_height ) != 2 )
{
msg_Err( p_stream, "bad size %s for file %s", psz_size,
psz_file );
free( p_sys );
return VLC_EGENERIC;
}
}
if ( UnpackFromFile( p_stream, psz_file, i_width, i_height,
&p_sys->p_pictures[p_sys->i_nb_pictures] ) < 0 )
{
free( p_sys );
return VLC_EGENERIC;
}
p_sys->i_nb_pictures++;
}
var_Get( p_stream, SOUT_CFG_PREFIX "aspect-ratio", &val );
if ( val.psz_string )
{
char *psz_parser = strchr( val.psz_string, ':' );
if( psz_parser )
{
*psz_parser++ = '\0';
p_sys->i_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
/ atoi( psz_parser );
}
else
{
msg_Warn( p_stream, "bad aspect ratio %s", val.psz_string );
p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
}
free( val.psz_string );
}
else
{
p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
}
var_Get( p_stream, SOUT_CFG_PREFIX "port", &val );
p_sys->i_fd = net_ListenUDP1( VLC_OBJECT(p_stream), NULL, val.i_int );
if ( p_sys->i_fd < 0 )
{
free( p_sys );
return VLC_EGENERIC;
}
var_Get( p_stream, SOUT_CFG_PREFIX "command", &val );
p_sys->i_cmd = val.i_int;
p_sys->i_old_cmd = 0;
var_Get( p_stream, SOUT_CFG_PREFIX "gop", &val );
p_sys->i_gop = val.i_int;
var_Get( p_stream, SOUT_CFG_PREFIX "qscale", &val );
p_sys->i_qscale = val.i_int;
var_Get( p_stream, SOUT_CFG_PREFIX "mute-audio", &val );
p_sys->b_audio = val.b_bool;
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;
free( p_sys );
}
/*****************************************************************************
* Add: Add an input elementary stream
*****************************************************************************/
static sout_stream_id_t *Add( sout_stream_t *p_stream, es_format_t *p_fmt )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
sout_stream_id_t *id;
id = calloc( 1, sizeof( sout_stream_id_t ) );
if( !id )
return NULL;
if( p_fmt->i_cat == VIDEO_ES &&
( p_fmt->i_codec == VLC_CODEC_MPGV ||
p_fmt->i_codec == VLC_FOURCC('f', 'a', 'k', 'e') ) )
{
id->b_switcher_video = true;
p_fmt->i_codec = VLC_CODEC_MPGV;
msg_Dbg( p_stream, "creating video switcher for fcc=`%4.4s' cmd:%d",
(char*)&p_fmt->i_codec, p_sys->i_cmd );
}
else if ( p_fmt->i_cat == AUDIO_ES &&
p_fmt->i_codec == VLC_CODEC_MPGA &&
p_sys->b_audio )
{
int i_ff_codec = CODEC_ID_MP2;
int i;
id->b_switcher_audio = true;
msg_Dbg( p_stream, "creating audio switcher for fcc=`%4.4s' cmd:%d",
(char*)&p_fmt->i_codec, p_sys->i_cmd );
/* Allocate the encoder right now. */
if( i_ff_codec == 0 )
{
msg_Err( p_stream, "cannot find encoder" );
free( id );
return NULL;
}
id->ff_enc = avcodec_find_encoder( i_ff_codec );
if( !id->ff_enc )
{
msg_Err( p_stream, "cannot find encoder (avcodec)" );
free( id );
return NULL;
}
id->ff_enc_c = avcodec_alloc_context();
/* Set CPU capabilities */
unsigned i_cpu = vlc_CPU();
id->ff_enc_c->dsp_mask = 0;
if( !(i_cpu & CPU_CAPABILITY_MMX) )
{
id->ff_enc_c->dsp_mask |= FF_MM_MMX;
}
if( !(i_cpu & CPU_CAPABILITY_MMXEXT) )
{
id->ff_enc_c->dsp_mask |= FF_MM_MMXEXT;
}
if( !(i_cpu & CPU_CAPABILITY_3DNOW) )
{
id->ff_enc_c->dsp_mask |= FF_MM_3DNOW;
}
if( !(i_cpu & CPU_CAPABILITY_SSE) )
{
id->ff_enc_c->dsp_mask |= FF_MM_SSE;
id->ff_enc_c->dsp_mask |= FF_MM_SSE2;
}
id->ff_enc_c->sample_rate = p_fmt->audio.i_rate;
id->ff_enc_c->channels = p_fmt->audio.i_channels;
id->ff_enc_c->bit_rate = p_fmt->i_bitrate;
vlc_avcodec_lock();
if( avcodec_open( id->ff_enc_c, id->ff_enc ) )
{
vlc_avcodec_unlock();
msg_Err( p_stream, "cannot open encoder" );
av_free( id->ff_enc_c );
free( id );
return NULL;
}
vlc_avcodec_unlock();
id->p_buffer_out = malloc( AVCODEC_MAX_AUDIO_FRAME_SIZE * 2 );
id->p_samples = calloc( id->ff_enc_c->frame_size * p_fmt->audio.i_channels,
sizeof(int16_t) );
if( !id->p_buffer_out || !id->p_samples )
goto error;
for( i = 0; i < MAX_AUDIO; i++ )
{
if( p_sys->pp_audio_ids[i] == NULL )
{
p_sys->pp_audio_ids[i] = id;
break;
}
}
if( i == MAX_AUDIO )
{
msg_Err( p_stream, "too many audio streams!" );
goto error;
}
}
else
{
msg_Dbg( p_stream, "do not know what to do when switching (fcc=`%4.4s')",
(char*)&p_fmt->i_codec );
}
/* src format */
memcpy( &id->f_src, p_fmt, sizeof( es_format_t ) );
/* open output stream */
id->id = p_stream->p_next->pf_add( p_stream->p_next, p_fmt );
if( id->id != NULL )
return id;
error:
vlc_avcodec_lock();
avcodec_close( id->ff_enc_c );
vlc_avcodec_unlock();
free( id->p_samples );
free( id->p_buffer_out );
av_free( id->ff_enc_c );
free( id );
return NULL;
}
/*****************************************************************************
* Del: Del an elementary stream
*****************************************************************************/
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_switcher_audio )
{
int i;
for ( i = 0; i < MAX_AUDIO; i++ )
{
if ( p_sys->pp_audio_ids[i] == id )
{
p_sys->pp_audio_ids[i] = NULL;
break;
}
}
}
if ( id->ff_enc )
{
vlc_avcodec_lock();
avcodec_close( id->ff_enc_c );
vlc_avcodec_unlock();
av_free( id->ff_enc_c );
av_free( id->p_frame );
free( id->p_buffer_out );
}
if ( id->id )
{
p_stream->p_next->pf_del( p_stream->p_next, id->id );
}
free( id );
return VLC_SUCCESS;
}
/*****************************************************************************
* Send: Process an input packet
*****************************************************************************/
static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
block_t *p_buffer )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
if ( !id->id )
{
block_Release( p_buffer );
return VLC_EGENERIC;
}
if ( !id->b_switcher_video && !id->b_switcher_audio )
{
return p_stream->p_next->pf_send( p_stream->p_next, id->id, p_buffer );
}
block_ChainAppend( &id->p_queued, p_buffer );
if ( id->b_switcher_video )
{
/* Check for commands for every video frame. */
NetCommand( p_stream );
while ( id->p_queued != NULL )
{
mtime_t i_dts;
int i;
if ( p_sys->i_old_cmd != p_sys->i_cmd )
{
i_dts = VideoCommand( p_stream, id );
}
i_dts = Process( p_stream, id, i_dts );
for ( i = 0; i < MAX_AUDIO; i++ )
{
if ( p_sys->pp_audio_ids[i] != NULL )
Process( p_stream, p_sys->pp_audio_ids[i], i_dts );
}
}
}
return VLC_SUCCESS;
}
/*****************************************************************************
* Process: Process and dispatch buffers
*****************************************************************************/
static mtime_t Process( sout_stream_t *p_stream, sout_stream_id_t *id,
mtime_t i_max_dts )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
mtime_t i_dts = 0;
block_t *p_blocks = NULL;
block_t *p_blocks_out = NULL;
/* Find out the blocks we need. */
while ( id->p_queued != NULL
&& (!i_max_dts || id->p_queued->i_dts <= i_max_dts) )
{
block_t *p_next = id->p_queued->p_next;
id->p_queued->p_next = NULL;
i_dts = id->p_queued->i_dts;
block_ChainAppend( &p_blocks, id->p_queued );
id->p_queued = p_next;
}
if ( p_sys->i_old_cmd == 0 )
{
/* Full forward */
if ( p_blocks != NULL )
p_stream->p_next->pf_send( p_stream->p_next, id->id, p_blocks );
return i_dts;
}
if ( p_sys->i_old_cmd == -1 )
{
/* No output at all */
while ( p_blocks != NULL )
{
block_t * p_next = p_blocks->p_next;
block_Release( p_blocks );
p_blocks = p_next;
}
return i_dts;
}
while ( p_blocks != NULL )
{
block_t * p_next = p_blocks->p_next;
block_t * p_out;
if ( id->b_switcher_video )
{
p_out = VideoGetBuffer( p_stream, id, p_blocks );
}
else
{
p_out = AudioGetBuffer( p_stream, id, p_blocks );
}
p_blocks = p_next;
if ( p_out != NULL )
{
block_ChainAppend( &p_blocks_out, p_out );
}
}
if ( p_blocks_out != NULL )
p_stream->p_next->pf_send( p_stream->p_next, id->id, p_blocks_out );
return i_dts;
}
/*****************************************************************************
* UnpackFromFile: Read a YUV picture and store it in our format
*****************************************************************************/
static int UnpackFromFile( sout_stream_t *p_stream, const char *psz_file,
int i_width, int i_height,
picture_t *p_pic )
{
int i, j;
FILE *p_file = vlc_fopen( psz_file, "r" );
if ( p_file == NULL )
{
msg_Err( p_stream, "file %s not found", psz_file );
return -1;
}
if( picture_Setup( p_pic, VLC_CODEC_I420,
i_width, i_height, 1, 1 ) )
{
msg_Err( p_stream, "unknown chroma" );
return -1;
}
for ( i = 0; i < p_pic->i_planes; i++ )
{
p_pic->p[i].p_pixels = malloc( p_pic->p[i].i_lines *
p_pic->p[i].i_pitch );
memset( p_pic->p[i].p_pixels, 0, p_pic->p[i].i_lines *
p_pic->p[i].i_pitch );
}
for ( i = 0; i < i_height; i++ )
{
int i_chroma;
uint8_t p_buffer[i_width * 2];
uint8_t *p_char = p_buffer;
uint8_t *p_y = &p_pic->p[0].p_pixels[i * p_pic->p[0].i_pitch];
uint8_t *p_u = &p_pic->p[1].p_pixels[i/2 * p_pic->p[1].i_pitch];
uint8_t *p_v = &p_pic->p[2].p_pixels[i/2 * p_pic->p[2].i_pitch];
if ( fread( p_buffer, 2, i_width, p_file ) != (size_t)i_width )
{
msg_Err( p_stream, "premature end of file %s", psz_file );
fclose( p_file );
for ( i = 0; i < p_pic->i_planes; i++ )
{
free( p_pic->p[i].p_pixels );
}
return -1;
}
i_chroma = 0;
for ( j = 0; j < i_width; j++ )
{
uint8_t **pp_chroma = i_chroma ? &p_v : &p_u;
i_chroma = !i_chroma;
if ( i & 1 )
**pp_chroma = (**pp_chroma + *p_char + 1) / 2;
else
**pp_chroma = *p_char;
(*pp_chroma)++;
p_char++;
*p_y++ = *p_char++;
}
}
fclose( p_file );
return 0;
}
/*****************************************************************************
* NetCommand: Get a command from the network
*****************************************************************************/
static void NetCommand( sout_stream_t *p_stream )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
char psz_buffer[11];
int i_len = recv( p_sys->i_fd, psz_buffer, sizeof( psz_buffer ) - 1, 0 );
if ( i_len > 0 )
{
psz_buffer[i_len] = '\0';
int i_cmd = strtol( psz_buffer, NULL, 0 );
if ( i_cmd < -1 || i_cmd > p_sys->i_nb_pictures )
{
msg_Err( p_stream, "got a wrong command (%d)", i_cmd );
return;
}
p_sys->i_cmd = i_cmd;
msg_Dbg( p_stream, "new command: %d old:%d", p_sys->i_cmd,
p_sys->i_old_cmd );
}
}
/*****************************************************************************
* VideoCommand: Create/Delete a video encoder
*****************************************************************************/
static mtime_t VideoCommand( sout_stream_t *p_stream, sout_stream_id_t *id )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
if ( p_sys->i_cmd == 0 && !(id->p_queued->i_flags & BLOCK_FLAG_TYPE_I) )
{
mtime_t i_dts = id->p_queued->i_dts;
block_t *p_block = id->p_queued->p_next;
while ( p_block != NULL )
{
if ( p_block->i_flags & BLOCK_FLAG_TYPE_I )
return i_dts;
i_dts = p_block->i_dts;
p_block = p_block->p_next;
}
return 0;
}
p_sys->i_old_cmd = p_sys->i_cmd;
if ( id->ff_enc )
{
vlc_avcodec_lock();
avcodec_close( id->ff_enc_c );
vlc_avcodec_unlock();
av_free( id->ff_enc_c );
av_free( id->p_frame );
free( id->p_buffer_out );
id->ff_enc = NULL;
}
if ( p_sys->i_cmd > 0 )
{
/* Create a new encoder. */
int i_ff_codec = CODEC_ID_MPEG2VIDEO;
int i_aspect_num, i_aspect_den;
if( i_ff_codec == 0 )
{
msg_Err( p_stream, "cannot find encoder" );
return 0;
}
id->ff_enc = avcodec_find_encoder( i_ff_codec );
if( !id->ff_enc )
{
msg_Err( p_stream, "cannot find encoder (avcodec)" );
return 0;
}
id->ff_enc_c = avcodec_alloc_context();
/* Set CPU capabilities */
unsigned i_cpu = vlc_CPU();
id->ff_enc_c->dsp_mask = 0;
if( !(i_cpu & CPU_CAPABILITY_MMX) )
{
id->ff_enc_c->dsp_mask |= FF_MM_MMX;
}
if( !(i_cpu & CPU_CAPABILITY_MMXEXT) )
{
id->ff_enc_c->dsp_mask |= FF_MM_MMXEXT;
}
if( !(i_cpu & CPU_CAPABILITY_3DNOW) )
{
id->ff_enc_c->dsp_mask |= FF_MM_3DNOW;
}
if( !(i_cpu & CPU_CAPABILITY_SSE) )
{
id->ff_enc_c->dsp_mask |= FF_MM_SSE;
id->ff_enc_c->dsp_mask |= FF_MM_SSE2;
}
id->ff_enc_c->width = p_sys->p_pictures[p_sys->i_cmd-1].format.i_width;
id->ff_enc_c->height = p_sys->p_pictures[p_sys->i_cmd-1].format.i_height;
av_reduce( &i_aspect_num, &i_aspect_den,
p_sys->i_aspect,
VOUT_ASPECT_FACTOR, 1 << 30 /* something big */ );
av_reduce( &id->ff_enc_c->sample_aspect_ratio.num,
&id->ff_enc_c->sample_aspect_ratio.den,
i_aspect_num * (int64_t)id->ff_enc_c->height,
i_aspect_den * (int64_t)id->ff_enc_c->width, 1 << 30 );
#if LIBAVCODEC_BUILD >= 4754
id->ff_enc_c->time_base.num = 1;
id->ff_enc_c->time_base.den = 25; /* FIXME */
#else
id->ff_enc_c->frame_rate = 25; /* FIXME */
id->ff_enc_c->frame_rate_base = 1;
#endif
id->ff_enc_c->gop_size = 200;
id->ff_enc_c->max_b_frames = 0;
id->ff_enc_c->flags |= CODEC_FLAG_QSCALE
| CODEC_FLAG_INPUT_PRESERVED
| CODEC_FLAG_LOW_DELAY;
id->ff_enc_c->mb_decision = FF_MB_DECISION_SIMPLE;
id->ff_enc_c->pix_fmt = PIX_FMT_YUV420P;
vlc_avcodec_lock();
if( avcodec_open( id->ff_enc_c, id->ff_enc ) )
{
vlc_avcodec_unlock();
msg_Err( p_stream, "cannot open encoder" );
return 0;
}
vlc_avcodec_unlock();
id->p_buffer_out = malloc( id->ff_enc_c->width * id->ff_enc_c->height * 3 );
id->p_frame = avcodec_alloc_frame();
id->p_frame->linesize[0] = p_sys->p_pictures[p_sys->i_cmd-1].p[0].i_pitch;
id->p_frame->linesize[1] = p_sys->p_pictures[p_sys->i_cmd-1].p[1].i_pitch;
id->p_frame->linesize[2] = p_sys->p_pictures[p_sys->i_cmd-1].p[2].i_pitch;
id->p_frame->data[0] = p_sys->p_pictures[p_sys->i_cmd-1].p[0].p_pixels;
id->p_frame->data[1] = p_sys->p_pictures[p_sys->i_cmd-1].p[1].p_pixels;
id->p_frame->data[2] = p_sys->p_pictures[p_sys->i_cmd-1].p[2].p_pixels;
id->i_nb_pred = p_sys->i_gop;
}
return 0;
}
/*****************************************************************************
* VideoGetBuffer: Build an alternate video buffer
*****************************************************************************/
static block_t *VideoGetBuffer( sout_stream_t *p_stream, sout_stream_id_t *id,
block_t *p_buffer )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
int i_out;
block_t *p_out;
id->p_frame->quality = p_sys->i_qscale * powf(2.0, FF_LAMBDA_SHIFT + 7.0)
/ 139.0;
id->p_frame->interlaced_frame = 0;
id->p_frame->top_field_first = 1;
id->p_frame->pts = p_buffer->i_dts;
if ( id->i_nb_pred >= p_sys->i_gop )
{
id->p_frame->pict_type = FF_I_TYPE;
#if 0
id->p_frame->me_threshold = 0;
id->p_frame->mb_threshold = 0;
#endif
id->i_nb_pred = 0;
}
else
{
id->p_frame->pict_type = FF_P_TYPE;
#if 0
if ( id->p_frame->mb_type != NULL )
{
id->p_frame->me_threshold = MAX_THRESHOLD;
id->p_frame->mb_threshold = MAX_THRESHOLD;
}
#endif
id->i_nb_pred++;
}
i_out = avcodec_encode_video( id->ff_enc_c, id->p_buffer_out,
id->ff_enc_c->width * id->ff_enc_c->height * 3,
id->p_frame );
if ( i_out <= 0 )
return NULL;
#if 0
if ( id->p_frame->mb_type == NULL
&& id->ff_enc_c->coded_frame->pict_type != FF_I_TYPE )
{
int mb_width = (id->ff_enc_c->width + 15) / 16;
int mb_height = (id->ff_enc_c->height + 15) / 16;
int h_chroma_shift, v_chroma_shift;
int i;
avcodec_get_chroma_sub_sample( id->ff_enc_c->pix_fmt, &h_chroma_shift,
&v_chroma_shift );
id->p_frame->motion_subsample_log2
= id->ff_enc_c->coded_frame->motion_subsample_log2;
id->p_frame->mb_type = malloc( ((mb_width + 1) * (mb_height + 1) + 1)
* sizeof(uint32_t) );
vlc_memcpy( id->p_frame->mb_type, id->ff_enc_c->coded_frame->mb_type,
(mb_width + 1) * mb_height * sizeof(id->p_frame->mb_type[0]));
for ( i = 0; i < 2; i++ )
{
int stride = ((16 * mb_width )
>> id->ff_enc_c->coded_frame->motion_subsample_log2) + 1;
int height = ((16 * mb_height)
>> id->ff_enc_c->coded_frame->motion_subsample_log2);
int b8_stride = mb_width * 2 + 1;
if ( id->ff_enc_c->coded_frame->motion_val[i] )
{
id->p_frame->motion_val[i] = malloc( 2 * stride * height
* sizeof(int16_t) );
vlc_memcpy( id->p_frame->motion_val[i],
id->ff_enc_c->coded_frame->motion_val[i],
2 * stride * height * sizeof(int16_t) );
}
if ( id->ff_enc_c->coded_frame->ref_index[i] )
{
id->p_frame->ref_index[i] = malloc( b8_stride * 2 * mb_height
* sizeof(int8_t) );
vlc_memcpy( id->p_frame->ref_index[i],
id->ff_enc_c->coded_frame->ref_index[i],
b8_stride * 2 * mb_height * sizeof(int8_t));
}
}
}
#endif
p_out = block_New( p_stream, i_out );
vlc_memcpy( p_out->p_buffer, id->p_buffer_out, i_out );
p_out->i_length = p_buffer->i_length;
p_out->i_pts = p_buffer->i_dts;
p_out->i_dts = p_buffer->i_dts;
p_out->i_rate = p_buffer->i_rate;
switch ( id->ff_enc_c->coded_frame->pict_type )
{
case FF_I_TYPE:
p_out->i_flags |= BLOCK_FLAG_TYPE_I;
break;
case FF_P_TYPE:
p_out->i_flags |= BLOCK_FLAG_TYPE_P;
break;
case FF_B_TYPE:
p_out->i_flags |= BLOCK_FLAG_TYPE_B;
break;
default:
break;
}
block_Release( p_buffer );
return p_out;
}
/*****************************************************************************
* AudioGetBuffer: Build an alternate audio buffer
*****************************************************************************/
static block_t *AudioGetBuffer( sout_stream_t *p_stream, sout_stream_id_t *id,
block_t *p_buffer )
{
int i_out;
block_t *p_out;
(void)p_stream;
i_out = avcodec_encode_audio( id->ff_enc_c, id->p_buffer_out,
2 * AVCODEC_MAX_AUDIO_FRAME_SIZE,
id->p_samples );
if ( i_out <= 0 )
return NULL;
p_out = block_New( p_stream, i_out );
vlc_memcpy( p_out->p_buffer, id->p_buffer_out, i_out );
p_out->i_length = p_buffer->i_length;
p_out->i_pts = p_buffer->i_dts;
p_out->i_dts = p_buffer->i_dts;
p_out->i_rate = p_buffer->i_rate;
block_Release( p_buffer );
return p_out;
}