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vlc/modules/packetizer/mpeg4video.c

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/*****************************************************************************
* mpeg4video.c
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
* $Id: mpeg4video.c,v 1.14 2003/09/24 14:59:21 fenrir Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Eric Petit <titer@videolan.org>
*
* 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 <vlc/vlc.h>
#include <vlc/aout.h>
#include <vlc/decoder.h>
#include <vlc/input.h>
#include <vlc/sout.h>
#include <stdlib.h> /* malloc(), free() */
#include <string.h> /* strdup() */
#include "codecs.h"
/*****************************************************************************
* Local prototypes
*****************************************************************************/
typedef struct packetizer_thread_s
{
/* Input properties */
decoder_fifo_t *p_fifo;
/* Output properties */
sout_packetizer_input_t *p_sout_input;
sout_format_t output_format;
mtime_t i_last_pts;
int i_vol;
uint8_t *p_vol;
} packetizer_thread_t;
static int Open ( vlc_object_t * );
static int Run ( decoder_fifo_t * );
static int InitThread ( packetizer_thread_t * );
static void PacketizeThread ( packetizer_thread_t * );
static void EndThread ( packetizer_thread_t * );
static void input_ShowPES( decoder_fifo_t *p_fifo, pes_packet_t **pp_pes );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_description( _("MPEG4 Video packetizer") );
set_capability( "packetizer", 50 );
set_callbacks( Open, NULL );
vlc_module_end();
#define VIDEO_OBJECT_MASK 0x01f
#define VIDEO_OBJECT_LAYER_MASK 0x00f
#define VIDEO_OBJECT_START_CODE 0x100
#define VIDEO_OBJECT_LAYER_START_CODE 0x120
#define VISUAL_OBJECT_SEQUENCE_START_CODE 0x1b0
#define VISUAL_OBJECT_SEQUENCE_END_CODE 0x1b1
#define USER_DATA_START_CODE 0x1b2
#define GROUP_OF_VOP_START_CODE 0x1b3
#define VIDEO_SESSION_ERROR_CODE 0x1b4
#define VISUAL_OBJECT_START_CODE 0x1b5
#define VOP_START_CODE 0x1b6
#define FACE_OBJECT_START_CODE 0x1ba
#define FACE_OBJECT_PLANE_START_CODE 0x1bb
#define MESH_OBJECT_START_CODE 0x1bc
#define MESH_OBJECT_PLANE_START_CODE 0x1bd
#define STILL_TEXTURE_OBJECT_START_CODE 0x1be
#define TEXTURE_SPATIAL_LAYER_START_CODE 0x1bf
#define TEXTURE_SNR_LAYER_START_CODE 0x1c0
/*****************************************************************************
* OpenDecoder: probe the packetizer and return score
*****************************************************************************
* Tries to launch a decoder and return score so that the interface is able
* to choose.
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t*)p_this;
switch( p_dec->p_fifo->i_fourcc )
{
case VLC_FOURCC( 'm', '4', 's', '2'):
case VLC_FOURCC( 'M', '4', 'S', '2'):
case VLC_FOURCC( 'm', 'p', '4', 's'):
case VLC_FOURCC( 'M', 'P', '4', 'S'):
case VLC_FOURCC( 'm', 'p', '4', 'v'):
case VLC_FOURCC( 'D', 'I', 'V', 'X'):
case VLC_FOURCC( 'd', 'i', 'v', 'x'):
case VLC_FOURCC( 'X', 'V', 'I', 'D'):
case VLC_FOURCC( 'X', 'v', 'i', 'D'):
case VLC_FOURCC( 'x', 'v', 'i', 'd'):
case VLC_FOURCC( 'D', 'X', '5', '0'):
case VLC_FOURCC( 0x04, 0, 0, 0):
case VLC_FOURCC( '3', 'I', 'V', '2'):
p_dec->pf_run = Run;
return VLC_SUCCESS;
default:
return VLC_EGENERIC;
}
}
/*****************************************************************************
* RunDecoder: this function is called just after the thread is created
*****************************************************************************/
static int Run( decoder_fifo_t *p_fifo )
{
packetizer_thread_t *p_pack;
int b_error;
msg_Info( p_fifo, "Running MPEG4 Video packetizer" );
if( !( p_pack = malloc( sizeof( packetizer_thread_t ) ) ) )
{
msg_Err( p_fifo, "out of memory" );
DecoderError( p_fifo );
return( -1 );
}
memset( p_pack, 0, sizeof( packetizer_thread_t ) );
p_pack->p_fifo = p_fifo;
if( InitThread( p_pack ) != 0 )
{
DecoderError( p_fifo );
return( -1 );
}
while( ( !p_pack->p_fifo->b_die )&&( !p_pack->p_fifo->b_error ) )
{
PacketizeThread( p_pack );
}
if( ( b_error = p_pack->p_fifo->b_error ) )
{
DecoderError( p_pack->p_fifo );
}
EndThread( p_pack );
if( b_error )
{
return( -1 );
}
return( 0 );
}
#define FREE( p ) if( p ) free( p ); p = NULL
/*****************************************************************************
* InitThread: initialize data before entering main loop
*****************************************************************************/
static int InitThread( packetizer_thread_t *p_pack )
{
BITMAPINFOHEADER *p_bih;
p_bih = (BITMAPINFOHEADER*)p_pack->p_fifo->p_bitmapinfoheader;
if( p_bih && p_bih->biSize > sizeof( BITMAPINFOHEADER ) )
{
/* We have a vol */
p_pack->i_vol = p_bih->biSize - sizeof( BITMAPINFOHEADER );
p_pack->p_vol = malloc( p_pack->i_vol );
memcpy( p_pack->p_vol, &p_bih[1], p_pack->i_vol );
/* create stream input output */
p_pack->output_format.i_cat = VIDEO_ES;
p_pack->output_format.i_fourcc = VLC_FOURCC( 'm', 'p', '4', 'v' );
p_pack->output_format.i_width = p_bih->biWidth;
p_pack->output_format.i_height = p_bih->biHeight;
p_pack->output_format.i_bitrate= 0;
p_pack->output_format.i_extra_data = p_pack->i_vol;
p_pack->output_format.p_extra_data = malloc( p_pack->i_vol );
memcpy( p_pack->output_format.p_extra_data,
p_pack->p_vol,
p_pack->i_vol );
msg_Warn( p_pack->p_fifo, "opening with vol size:%d", p_pack->i_vol );
p_pack->p_sout_input =
sout_InputNew( p_pack->p_fifo,
&p_pack->output_format );
}
else
{
p_pack->i_vol = 0;
p_pack->p_vol = 0;
p_pack->output_format.i_cat = UNKNOWN_ES;
p_pack->output_format.i_fourcc = VLC_FOURCC( 'n', 'u', 'l', 'l' );
p_pack->output_format.i_width = 0;
p_pack->output_format.i_height = 0;
p_pack->output_format.i_bitrate= 0;
p_pack->output_format.i_extra_data = 0;
p_pack->output_format.p_extra_data = NULL;
p_pack->p_sout_input =
sout_InputNew( p_pack->p_fifo,
&p_pack->output_format );
}
if( !p_pack->p_sout_input )
{
msg_Err( p_pack->p_fifo, "cannot add a new stream" );
return( -1 );
}
p_pack->i_last_pts = 0;
return VLC_SUCCESS;
}
static int m4v_FindStartCode( uint8_t **pp_data, uint8_t *p_end )
{
for( ; *pp_data < p_end - 4; (*pp_data)++ )
{
if( (*pp_data)[0] == 0 && (*pp_data)[1] == 0 && (*pp_data)[2] == 1 )
{
return( 0 );
}
}
fprintf( stderr, "\n********* cannot find startcode\n" );
return( -1 );
}
/*****************************************************************************
* PacketizeThread: packetize an unit (here copy a complete pes)
*****************************************************************************/
static void PacketizeThread( packetizer_thread_t *p_pack )
{
sout_buffer_t *p_sout_buffer;
pes_packet_t *p_pes;
ssize_t i_size;
mtime_t i_pts;
/* **** get samples count **** */
input_ExtractPES( p_pack->p_fifo, &p_pes );
if( !p_pes )
{
p_pack->p_fifo->b_error = 1;
return;
}
i_pts = p_pes->i_pts;
#if 0
if( i_pts <= 0 && p_pack->i_last_pts <= 0 )
{
msg_Dbg( p_pack->p_fifo, "need a starting pts" );
input_DeletePES( p_pack->p_fifo->p_packets_mgt, p_pes );
return;
}
#endif
i_size = p_pes->i_pes_size;
if( i_size > 0 )
{
pes_packet_t *p_pes_next;
data_packet_t *p_data;
ssize_t i_buffer;
p_sout_buffer =
sout_BufferNew( p_pack->p_sout_input->p_sout, i_size );
if( !p_sout_buffer )
{
p_pack->p_fifo->b_error = 1;
return;
}
/* TODO: memcpy of the pes packet */
for( i_buffer = 0, p_data = p_pes->p_first;
p_data != NULL && i_buffer < i_size;
p_data = p_data->p_next)
{
ssize_t i_copy;
i_copy = __MIN( p_data->p_payload_end - p_data->p_payload_start,
i_size - i_buffer );
if( i_copy > 0 )
{
p_pack->p_fifo->p_vlc->pf_memcpy( p_sout_buffer->p_buffer + i_buffer,
p_data->p_payload_start,
i_copy );
}
i_buffer += i_copy;
}
input_ShowPES( p_pack->p_fifo, &p_pes_next );
if( p_pes_next && p_pes_next->i_pts > 0 )
{
mtime_t i_gap;
i_gap = p_pes_next->i_pts - p_pes->i_pts;
p_sout_buffer->i_length = i_gap;
}
else
{
p_sout_buffer->i_length = 0;
}
p_sout_buffer->i_dts = i_pts;
p_sout_buffer->i_pts = i_pts;
p_sout_buffer->i_bitrate = 0;
if( p_pack->p_vol == NULL )
{
uint8_t *p_vol_begin, *p_vol_end, *p_end;
/* search if p_sout_buffer contains with a vol */
p_vol_begin = p_sout_buffer->p_buffer;
p_vol_end = NULL;
p_end = p_sout_buffer->p_buffer + p_sout_buffer->i_size;
for( ;; )
{
if( m4v_FindStartCode( &p_vol_begin, p_end ) )
{
break;
}
msg_Dbg( p_pack->p_fifo,
"starcode 0x%2.2x%2.2x%2.2x%2.2x",
p_vol_begin[0], p_vol_begin[1], p_vol_begin[2], p_vol_begin[3] );
if( ( p_vol_begin[3] & ~VIDEO_OBJECT_MASK ) == ( VIDEO_OBJECT_START_CODE&0xff ) )
{
p_vol_end = p_vol_begin + 4;
if( m4v_FindStartCode( &p_vol_end, p_end ) )
{
break;
}
if( ( p_vol_end[3] & ~VIDEO_OBJECT_LAYER_MASK ) == ( VIDEO_OBJECT_LAYER_START_CODE&0xff ) )
{
p_vol_end += 4;
if( m4v_FindStartCode( &p_vol_end, p_end ) )
{
p_vol_end = p_end;
}
}
else
{
p_vol_end = NULL;
}
}
else if( ( p_vol_begin[3] & ~VIDEO_OBJECT_LAYER_MASK ) == ( VIDEO_OBJECT_LAYER_START_CODE&0xff) )
{
p_vol_end = p_vol_begin + 4;
if( m4v_FindStartCode( &p_vol_end, p_end ) )
{
p_vol_end = p_end;
}
}
if( p_vol_end != NULL && p_vol_begin < p_vol_end )
{
BITMAPINFOHEADER *p_bih =
(BITMAPINFOHEADER*)p_pack->p_fifo->p_bitmapinfoheader;
p_pack->i_vol = p_vol_end - p_vol_begin;
msg_Dbg( p_pack->p_fifo, "Reopening output" );
p_pack->p_vol = malloc( p_pack->i_vol );
memcpy( p_pack->p_vol, p_vol_begin, p_pack->i_vol );
sout_InputDelete( p_pack->p_sout_input );
p_pack->output_format.i_cat = VIDEO_ES;
p_pack->output_format.i_fourcc = VLC_FOURCC( 'm', 'p', '4', 'v' );
if( p_bih )
{
p_pack->output_format.i_width = p_bih->biWidth;
p_pack->output_format.i_height = p_bih->biHeight;
}
else
{
p_pack->output_format.i_width = 0;
p_pack->output_format.i_height = 0;
}
p_pack->output_format.i_bitrate= 0;
p_pack->output_format.i_extra_data = p_pack->i_vol;
p_pack->output_format.p_extra_data = malloc( p_pack->i_vol );
memcpy( p_pack->output_format.p_extra_data,
p_pack->p_vol,
p_pack->i_vol );
p_pack->p_sout_input =
sout_InputNew( p_pack->p_fifo,
&p_pack->output_format );
if( !p_pack->p_sout_input )
{
p_pack->p_fifo->b_error = 1;
return;
}
break;
}
else
{
p_vol_begin += 4;
}
}
}
if( i_pts > 0 )
{
sout_InputSendBuffer( p_pack->p_sout_input,
p_sout_buffer );
}
else
{
sout_BufferDelete( p_pack->p_sout_input->p_sout,
p_sout_buffer );
}
}
input_DeletePES( p_pack->p_fifo->p_packets_mgt, p_pes );
}
/*****************************************************************************
* EndThread : packetizer thread destruction
*****************************************************************************/
static void EndThread ( packetizer_thread_t *p_pack)
{
if( p_pack->p_sout_input )
{
sout_InputDelete( p_pack->p_sout_input );
}
free( p_pack );
}
static void input_ShowPES( decoder_fifo_t *p_fifo, pes_packet_t **pp_pes )
{
pes_packet_t *p_pes;
vlc_mutex_lock( &p_fifo->data_lock );
if( p_fifo->p_first == NULL )
{
if( p_fifo->b_die )
{
vlc_mutex_unlock( &p_fifo->data_lock );
if( pp_pes ) *pp_pes = NULL;
return;
}
/* Signal the input thread we're waiting. This is only
* needed in case of slave clock (ES plug-in) but it won't
* harm. */
vlc_cond_signal( &p_fifo->data_wait );
/* Wait for the input to tell us when we received a packet. */
vlc_cond_wait( &p_fifo->data_wait, &p_fifo->data_lock );
}
p_pes = p_fifo->p_first;
vlc_mutex_unlock( &p_fifo->data_lock );
if( pp_pes )
{
*pp_pes = p_pes;
}
}