Commit 5aa4f283 authored by Laurent Aimar's avatar Laurent Aimar

* wav.c : big clean up and use ninput.h

parent ea6b5e75
/*****************************************************************************
* wav.c : wav file input module for vlc
*****************************************************************************
* Copyright (C) 2001 VideoLAN
* $Id: wav.c,v 1.1 2003/08/01 00:09:37 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> /* malloc(), free() */
#include <vlc/vlc.h>
#include <vlc/input.h>
#include <codecs.h>
#include <ninput.h>
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Activate ( vlc_object_t * );
static void Deactivate ( vlc_object_t * );
vlc_module_begin();
set_description( _("WAV demuxer") );
set_capability( "demux", 142 );
set_callbacks( Activate, Deactivate );
vlc_module_end();
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Demux ( input_thread_t * );
struct demux_sys_t
{
stream_t *s;
WAVEFORMATEX *p_wf;
es_descriptor_t *p_es;
int64_t i_data_pos;
unsigned int i_data_size;
mtime_t i_time;
unsigned int i_frame_size;
mtime_t i_frame_length;
};
/*****************************************************************************
* Declaration of local function
*****************************************************************************/
#define __EVEN( x ) ( ( (x)%2 != 0 ) ? ((x)+1) : (x) )
#define GetWLE( p ) __GetWLE( (uint8_t*)(p) )
static inline uint32_t __GetWLE( uint8_t *p )
{
return( p[0] + ( p[1] << 8 ) );
}
#define GetDWLE( p ) __GetDWLE( (uint8_t*)(p) )
static inline uint32_t __GetDWLE( uint8_t *p )
{
return( p[0] + ( p[1] << 8 ) + ( p[2] << 16 ) + ( p[3] << 24 ) );
}
static int ChunkFind( input_thread_t *, char *, unsigned int * );
static void FrameInfo_IMA_ADPCM( input_thread_t *, unsigned int *, mtime_t * );
static void FrameInfo_MS_ADPCM ( input_thread_t *, unsigned int *, mtime_t * );
static void FrameInfo_PCM ( input_thread_t *, unsigned int *, mtime_t * );
/*****************************************************************************
* Activate: check file and initializes structures
*****************************************************************************/
static int Activate( vlc_object_t * p_this )
{
input_thread_t *p_input = (input_thread_t *)p_this;
demux_sys_t *p_sys;
uint8_t *p_peek;
unsigned int i_size;
vlc_fourcc_t i_fourcc;
/* Is it a wav file ? */
if( input_Peek( p_input, &p_peek, 12 ) < 12 )
{
msg_Warn( p_input, "WAV module discarded (cannot peek)" );
return VLC_EGENERIC;
}
if( strncmp( p_peek, "RIFF", 4 ) || strncmp( &p_peek[8], "WAVE", 4 ) )
{
msg_Warn( p_input, "WAV module discarded (not a valid file)" );
return VLC_EGENERIC;
}
p_input->pf_demux = Demux;
p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) );
p_sys->p_wf = NULL;
p_sys->p_es = NULL;
p_sys->i_time = 0;
if( ( p_sys->s = stream_OpenInput( p_input ) ) == NULL )
{
msg_Err( p_input, "cannot create stream" );
goto error;
}
/* skip riff header */
stream_Read( p_sys->s, NULL, 12 ); /* cannot fail as peek succeed */
/* search fmt chunk */
if( ChunkFind( p_input, "fmt ", &i_size ) )
{
msg_Err( p_input, "cannot find 'fmt ' chunk" );
goto error;
}
if( i_size < sizeof( WAVEFORMATEX ) - 2 ) /* XXX -2 isn't a typo */
{
msg_Err( p_input, "invalid 'fmt ' chunk" );
goto error;
}
stream_Read( p_sys->s, NULL, 8 ); /* cannot fail */
/* load waveformatex */
p_sys->p_wf = malloc( __EVEN( i_size ) + 2 ); /* +2, for raw audio -> no cbSize */
p_sys->p_wf->cbSize = 0;
if( stream_Read( p_sys->s, p_sys->p_wf, __EVEN( i_size ) ) < (int)__EVEN( i_size ) )
{
msg_Err( p_input, "cannot load 'fmt ' chunk" );
goto error;
}
/* le->me */
p_sys->p_wf->wFormatTag = GetWLE ( &p_sys->p_wf->wFormatTag );
p_sys->p_wf->nChannels = GetWLE ( &p_sys->p_wf->nChannels );
p_sys->p_wf->nSamplesPerSec = GetDWLE( &p_sys->p_wf->nSamplesPerSec );
p_sys->p_wf->nAvgBytesPerSec = GetDWLE( &p_sys->p_wf->nAvgBytesPerSec );
p_sys->p_wf->nBlockAlign = GetWLE ( &p_sys->p_wf->nBlockAlign );
p_sys->p_wf->wBitsPerSample = GetWLE ( &p_sys->p_wf->wBitsPerSample );
p_sys->p_wf->cbSize = GetWLE ( &p_sys->p_wf->cbSize );
msg_Dbg( p_input, "format:0x%4.4x channels:%d %dHz %dKo/s blockalign:%d bits/samples:%d extra size:%d",
p_sys->p_wf->wFormatTag,
p_sys->p_wf->nChannels,
p_sys->p_wf->nSamplesPerSec,
p_sys->p_wf->nAvgBytesPerSec / 1024,
p_sys->p_wf->nBlockAlign,
p_sys->p_wf->wBitsPerSample,
p_sys->p_wf->cbSize );
if( ChunkFind( p_input, "data", &p_sys->i_data_size ) )
{
msg_Err( p_input, "cannot find 'data' chunk" );
goto error;
}
stream_Control( p_sys->s, STREAM_GET_POSITION, &p_sys->i_data_pos );
stream_Read( p_sys->s, NULL, 8 ); /* cannot fail */
/* XXX p_sys->psz_demux shouldn't be NULL ! */
switch( p_sys->p_wf->wFormatTag )
{
case( WAVE_FORMAT_PCM ):
msg_Dbg( p_input,"found raw pcm audio format" );
i_fourcc = VLC_FOURCC( 'a', 'r', 'a', 'w' );
FrameInfo_PCM( p_input, &p_sys->i_frame_size, &p_sys->i_frame_length );
break;
case( WAVE_FORMAT_MULAW ):
msg_Dbg( p_input,"found mulaw pcm audio format" );
i_fourcc = VLC_FOURCC( 'u', 'l', 'a', 'w' );
FrameInfo_PCM( p_input, &p_sys->i_frame_size, &p_sys->i_frame_length );
break;
case( WAVE_FORMAT_ALAW ):
msg_Dbg( p_input,"found alaw pcm audio format" );
i_fourcc = VLC_FOURCC( 'a', 'l', 'a', 'w' );
FrameInfo_PCM( p_input, &p_sys->i_frame_size, &p_sys->i_frame_length );
break;
case( WAVE_FORMAT_ADPCM ):
msg_Dbg( p_input, "found ms adpcm audio format" );
i_fourcc = VLC_FOURCC( 'm', 's', 0x00, 0x02 );
FrameInfo_MS_ADPCM( p_input, &p_sys->i_frame_size, &p_sys->i_frame_length );
break;
case( WAVE_FORMAT_IMA_ADPCM ):
msg_Dbg( p_input, "found ima adpcm audio format" );
i_fourcc = VLC_FOURCC( 'm', 's', 0x00, 0x11 );
FrameInfo_IMA_ADPCM( p_input, &p_sys->i_frame_size, &p_sys->i_frame_length );
break;
case( WAVE_FORMAT_MPEG ):
case( WAVE_FORMAT_MPEGLAYER3 ):
msg_Dbg( p_input, "found mpeg audio format (relaying to another demux)" );
/* FIXME set end of area FIXME */
goto relay;
case( WAVE_FORMAT_A52 ):
msg_Dbg( p_input,"found a52 audio format (relaying to another demux)" );
/* FIXME set end of area FIXME */
goto relay;
default:
msg_Err( p_input,"unrecognize audio format(0x%x)",
p_sys->p_wf->wFormatTag );
goto error;
}
/* create one program */
vlc_mutex_lock( &p_input->stream.stream_lock );
if( input_InitStream( p_input, 0 ) == -1)
{
vlc_mutex_unlock( &p_input->stream.stream_lock );
msg_Err( p_input, "cannot init stream" );
goto error;
}
if( input_AddProgram( p_input, 0, 0) == NULL )
{
vlc_mutex_unlock( &p_input->stream.stream_lock );
msg_Err( p_input, "cannot add program" );
goto error;
}
p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
if( p_sys->i_data_size > 0 )
{
p_input->stream.i_mux_rate = (mtime_t)p_sys->i_frame_size * (mtime_t)1000000 / 50 / p_sys->i_frame_length;
}
else
{
p_input->stream.i_mux_rate = 0;
}
p_sys->p_es = input_AddES( p_input,
p_input->stream.p_selected_program,
1, AUDIO_ES, NULL, 0 );
p_sys->p_es->i_stream_id = 1;
p_sys->p_es->i_fourcc = i_fourcc;
p_sys->p_es->p_waveformatex = malloc( sizeof( WAVEFORMATEX ) + p_sys->p_wf->cbSize );
memcpy( p_sys->p_es->p_waveformatex,
p_sys->p_wf,
sizeof( WAVEFORMATEX ) + p_sys->p_wf->cbSize );
input_SelectES( p_input, p_sys->p_es );
p_input->stream.p_selected_program->b_is_ok = 1;
vlc_mutex_unlock( &p_input->stream.stream_lock );
return VLC_SUCCESS;
error:
relay:
if( p_sys->p_wf )
{
free( p_sys->p_wf );
}
if( p_sys->s )
{
stream_Release( p_sys->s );
}
free( p_sys );
return VLC_EGENERIC;
}
/*****************************************************************************
* Demux: read packet and send them to decoders
*****************************************************************************
* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
*****************************************************************************/
static int Demux( input_thread_t *p_input )
{
demux_sys_t *p_sys = p_input->p_demux_data;
int64_t i_pos;
pes_packet_t *p_pes;
if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
{
stream_Control( p_sys->s, STREAM_GET_POSITION, &i_pos );
if( p_sys->p_wf->nBlockAlign != 0 )
{
i_pos += p_sys->p_wf->nBlockAlign - i_pos % p_sys->p_wf->nBlockAlign;
if( stream_Control( p_sys->s, STREAM_SET_POSITION, i_pos ) )
{
msg_Err( p_input, "STREAM_SET_POSITION failed (cannot resync)" );
}
}
}
input_ClockManageRef( p_input,
p_input->stream.p_selected_program,
p_sys->i_time * 9 / 100 );
stream_Control( p_sys->s, STREAM_GET_POSITION, &i_pos );
if( p_sys->i_data_size > 0 &&
i_pos >= p_sys->i_data_pos + p_sys->i_data_size )
{
/* EOF */
return 0;
}
if( ( p_pes = stream_PesPacket( p_sys->s, p_sys->i_frame_size ) ) == NULL )
{
msg_Warn( p_input, "cannot read data" );
return 0;
}
p_pes->i_dts =
p_pes->i_pts = input_ClockGetTS( p_input,
p_input->stream.p_selected_program,
p_sys->i_time * 9 / 100 );
if( !p_sys->p_es->p_decoder_fifo )
{
msg_Err( p_input, "no audio decoder" );
input_DeletePES( p_input->p_method_data, p_pes );
return( -1 );
}
input_DecodePES( p_sys->p_es->p_decoder_fifo, p_pes );
p_sys->i_time += p_sys->i_frame_length;
return( 1 );
}
/*****************************************************************************
* Deactivate: frees unused data
*****************************************************************************/
static void Deactivate ( vlc_object_t * p_this )
{
input_thread_t *p_input = (input_thread_t *)p_this;
demux_sys_t *p_sys = p_input->p_demux_data;
stream_Release( p_sys->s );
free( p_sys->p_wf );
free( p_sys );
}
/*****************************************************************************
* Local functions
*****************************************************************************/
static int ChunkFind( input_thread_t *p_input,
char *fcc, unsigned int *pi_size )
{
demux_sys_t *p_sys = p_input->p_demux_data;
uint8_t *p_peek;
for( ;; )
{
int i_size;
if( stream_Peek( p_sys->s, &p_peek, 8 ) < 8 )
{
msg_Err( p_input, "cannot peek()" );
return VLC_EGENERIC;
}
i_size = GetDWLE( p_peek + 4 );
msg_Dbg( p_input, "Chunk: fcc=`%4.4s` size=%d", p_peek, i_size );
if( !strncmp( p_peek, fcc, 4 ) )
{
if( pi_size )
{
*pi_size = i_size;
}
return VLC_SUCCESS;
}
i_size = __EVEN( i_size ) + 8;
if( stream_Read( p_sys->s, NULL, i_size ) != i_size )
{
return VLC_EGENERIC;
}
}
}
static void FrameInfo_PCM( input_thread_t *p_input,
unsigned int *pi_size,
mtime_t *pi_length )
{
WAVEFORMATEX *p_wf = p_input->p_demux_data->p_wf;
int i_samples;
int i_bytes;
int i_modulo;
/* read samples for 50ms of */
i_samples = __MAX( p_wf->nSamplesPerSec / 20, 1 );
*pi_length = (mtime_t)1000000 *
(mtime_t)i_samples /
(mtime_t)p_wf->nSamplesPerSec;
i_bytes = i_samples * p_wf->nChannels * ( (p_wf->wBitsPerSample + 7) / 8 );
if( p_wf->nBlockAlign > 0 )
{
if( ( i_modulo = i_bytes % p_wf->nBlockAlign ) != 0 )
{
i_bytes += p_wf->nBlockAlign - i_modulo;
}
}
*pi_size = i_bytes;
}
static void FrameInfo_MS_ADPCM( input_thread_t *p_input,
unsigned int *pi_size,
mtime_t *pi_length )
{
WAVEFORMATEX *p_wf = p_input->p_demux_data->p_wf;
int i_samples;
i_samples = 2 + 2 * ( p_wf->nBlockAlign -
7 * p_wf->nChannels ) / p_wf->nChannels;
*pi_length = (mtime_t)1000000 *
(mtime_t)i_samples /
(mtime_t)p_wf->nSamplesPerSec;
*pi_size = p_wf->nBlockAlign;
}
static void FrameInfo_IMA_ADPCM( input_thread_t *p_input,
unsigned int *pi_size,
mtime_t *pi_length )
{
WAVEFORMATEX *p_wf = p_input->p_demux_data->p_wf;
int i_samples;
i_samples = 2 * ( p_wf->nBlockAlign -
4 * p_wf->nChannels ) / p_wf->nChannels;
*pi_length = (mtime_t)1000000 *
(mtime_t)i_samples /
(mtime_t)p_wf->nSamplesPerSec;
*pi_size = p_wf->nBlockAlign;
}
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