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442 lines
14 KiB
442 lines
14 KiB
/*****************************************************************************
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* wav.c : wav file input module for vlc
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*****************************************************************************
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* Copyright (C) 2001 VideoLAN
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* $Id: wav.c,v 1.4 2003/08/18 00:17:44 fenrir Exp $
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*
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* Authors: Laurent Aimar <fenrir@via.ecp.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#include <stdlib.h> /* malloc(), free() */
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#include <vlc/vlc.h>
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#include <vlc/input.h>
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#include <codecs.h>
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#include <ninput.h>
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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static int Open ( vlc_object_t * );
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static void Close ( vlc_object_t * );
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vlc_module_begin();
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set_description( _("WAV demuxer") );
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set_capability( "demux", 142 );
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set_callbacks( Open, Close );
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vlc_module_end();
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static int Demux ( input_thread_t * );
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struct demux_sys_t
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{
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stream_t *s;
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WAVEFORMATEX *p_wf;
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es_descriptor_t *p_es;
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int64_t i_data_pos;
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unsigned int i_data_size;
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mtime_t i_time;
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unsigned int i_frame_size;
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mtime_t i_frame_length;
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};
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/*****************************************************************************
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* Declaration of local function
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*****************************************************************************/
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#define __EVEN( x ) ( ( (x)%2 != 0 ) ? ((x)+1) : (x) )
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static int ChunkFind( input_thread_t *, char *, unsigned int * );
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static void FrameInfo_IMA_ADPCM( input_thread_t *, unsigned int *, mtime_t * );
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static void FrameInfo_MS_ADPCM ( input_thread_t *, unsigned int *, mtime_t * );
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static void FrameInfo_PCM ( input_thread_t *, unsigned int *, mtime_t * );
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/*****************************************************************************
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* Open: check file and initializes structures
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*****************************************************************************/
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static int Open( vlc_object_t * p_this )
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{
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input_thread_t *p_input = (input_thread_t *)p_this;
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demux_sys_t *p_sys;
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uint8_t *p_peek;
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unsigned int i_size;
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vlc_fourcc_t i_fourcc;
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char *psz_name;
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/* Is it a wav file ? */
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if( input_Peek( p_input, &p_peek, 12 ) < 12 )
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{
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msg_Warn( p_input, "WAV module discarded (cannot peek)" );
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return VLC_EGENERIC;
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}
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if( strncmp( p_peek, "RIFF", 4 ) || strncmp( &p_peek[8], "WAVE", 4 ) )
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{
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msg_Warn( p_input, "WAV module discarded (not a valid file)" );
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return VLC_EGENERIC;
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}
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p_input->pf_demux = Demux;
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p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) );
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p_sys->p_wf = NULL;
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p_sys->p_es = NULL;
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p_sys->i_time = 0;
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if( ( p_sys->s = stream_OpenInput( p_input ) ) == NULL )
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{
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msg_Err( p_input, "cannot create stream" );
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goto error;
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}
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/* skip riff header */
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stream_Read( p_sys->s, NULL, 12 ); /* cannot fail as peek succeed */
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/* search fmt chunk */
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if( ChunkFind( p_input, "fmt ", &i_size ) )
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{
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msg_Err( p_input, "cannot find 'fmt ' chunk" );
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goto error;
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}
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if( i_size < sizeof( WAVEFORMATEX ) - 2 ) /* XXX -2 isn't a typo */
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{
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msg_Err( p_input, "invalid 'fmt ' chunk" );
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goto error;
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}
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stream_Read( p_sys->s, NULL, 8 ); /* cannot fail */
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/* load waveformatex */
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p_sys->p_wf = malloc( __EVEN( i_size ) + 2 ); /* +2, for raw audio -> no cbSize */
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p_sys->p_wf->cbSize = 0;
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if( stream_Read( p_sys->s, p_sys->p_wf, __EVEN( i_size ) ) < (int)__EVEN( i_size ) )
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{
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msg_Err( p_input, "cannot load 'fmt ' chunk" );
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goto error;
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}
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/* le->me */
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p_sys->p_wf->wFormatTag = GetWLE ( &p_sys->p_wf->wFormatTag );
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p_sys->p_wf->nChannels = GetWLE ( &p_sys->p_wf->nChannels );
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p_sys->p_wf->nSamplesPerSec = GetDWLE( &p_sys->p_wf->nSamplesPerSec );
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p_sys->p_wf->nAvgBytesPerSec = GetDWLE( &p_sys->p_wf->nAvgBytesPerSec );
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p_sys->p_wf->nBlockAlign = GetWLE ( &p_sys->p_wf->nBlockAlign );
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p_sys->p_wf->wBitsPerSample = GetWLE ( &p_sys->p_wf->wBitsPerSample );
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p_sys->p_wf->cbSize = GetWLE ( &p_sys->p_wf->cbSize );
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msg_Dbg( p_input, "format:0x%4.4x channels:%d %dHz %dKo/s blockalign:%d bits/samples:%d extra size:%d",
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p_sys->p_wf->wFormatTag,
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p_sys->p_wf->nChannels,
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p_sys->p_wf->nSamplesPerSec,
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p_sys->p_wf->nAvgBytesPerSec / 1024,
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p_sys->p_wf->nBlockAlign,
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p_sys->p_wf->wBitsPerSample,
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p_sys->p_wf->cbSize );
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if( ChunkFind( p_input, "data", &p_sys->i_data_size ) )
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{
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msg_Err( p_input, "cannot find 'data' chunk" );
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goto error;
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}
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stream_Control( p_sys->s, STREAM_GET_POSITION, &p_sys->i_data_pos );
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stream_Read( p_sys->s, NULL, 8 ); /* cannot fail */
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wf_tag_to_fourcc( p_sys->p_wf->wFormatTag, &i_fourcc, &psz_name );
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if( i_fourcc == VLC_FOURCC( 'u', 'n', 'd', 'f' ) )
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{
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msg_Err( p_input,"unrecognize audio format(0x%x)",
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p_sys->p_wf->wFormatTag );
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goto error;
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}
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switch( i_fourcc )
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{
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case VLC_FOURCC( 'a', 'r', 'a', 'w' ):
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case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
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case VLC_FOURCC( 'a', 'l', 'a', 'w' ):
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FrameInfo_PCM( p_input, &p_sys->i_frame_size, &p_sys->i_frame_length );
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break;
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case VLC_FOURCC( 'm', 's', 0x00, 0x02 ):
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FrameInfo_MS_ADPCM( p_input, &p_sys->i_frame_size, &p_sys->i_frame_length );
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break;
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case VLC_FOURCC( 'm', 's', 0x00, 0x11 ):
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FrameInfo_IMA_ADPCM( p_input, &p_sys->i_frame_size, &p_sys->i_frame_length );
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break;
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case VLC_FOURCC( 'm', 's', 0x00, 0x61 ):
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case VLC_FOURCC( 'm', 's', 0x00, 0x62 ):
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/* FIXME not sure at all FIXME */
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FrameInfo_MS_ADPCM( p_input, &p_sys->i_frame_size, &p_sys->i_frame_length );
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break;
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case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
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case VLC_FOURCC( 'a', '5', '2', ' ' ):
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/* FIXME set end of area FIXME */
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goto relay;
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default:
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msg_Err( p_input, "unsupported codec (%4.4s)", (char*)&i_fourcc );
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goto error;
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}
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msg_Dbg( p_input, "found %s audio format", psz_name );
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/* create one program */
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vlc_mutex_lock( &p_input->stream.stream_lock );
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if( input_InitStream( p_input, 0 ) == -1)
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{
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vlc_mutex_unlock( &p_input->stream.stream_lock );
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msg_Err( p_input, "cannot init stream" );
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goto error;
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}
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if( input_AddProgram( p_input, 0, 0) == NULL )
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{
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vlc_mutex_unlock( &p_input->stream.stream_lock );
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msg_Err( p_input, "cannot add program" );
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goto error;
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}
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p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
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if( p_sys->i_data_size > 0 )
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{
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p_input->stream.i_mux_rate = (mtime_t)p_sys->i_frame_size *
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(mtime_t)1000000 / 50 / p_sys->i_frame_length;
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}
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else
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{
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p_input->stream.i_mux_rate = 0;
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}
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p_sys->p_es = input_AddES( p_input,
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p_input->stream.p_selected_program,
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1, AUDIO_ES, NULL, 0 );
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p_sys->p_es->i_stream_id = 1;
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p_sys->p_es->i_fourcc = i_fourcc;
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p_sys->p_es->p_waveformatex = malloc( sizeof( WAVEFORMATEX ) + p_sys->p_wf->cbSize );
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memcpy( p_sys->p_es->p_waveformatex,
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p_sys->p_wf,
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sizeof( WAVEFORMATEX ) + p_sys->p_wf->cbSize );
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input_SelectES( p_input, p_sys->p_es );
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p_input->stream.p_selected_program->b_is_ok = 1;
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vlc_mutex_unlock( &p_input->stream.stream_lock );
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return VLC_SUCCESS;
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error:
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relay:
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if( p_sys->p_wf )
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{
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free( p_sys->p_wf );
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}
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if( p_sys->s )
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{
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stream_Release( p_sys->s );
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}
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free( p_sys );
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return VLC_EGENERIC;
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}
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/*****************************************************************************
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* Demux: read packet and send them to decoders
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*****************************************************************************
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* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
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*****************************************************************************/
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static int Demux( input_thread_t *p_input )
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{
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demux_sys_t *p_sys = p_input->p_demux_data;
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int64_t i_pos;
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pes_packet_t *p_pes;
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if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
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{
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stream_Control( p_sys->s, STREAM_GET_POSITION, &i_pos );
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if( p_sys->p_wf->nBlockAlign != 0 )
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{
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i_pos += p_sys->p_wf->nBlockAlign - i_pos % p_sys->p_wf->nBlockAlign;
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if( stream_Control( p_sys->s, STREAM_SET_POSITION, i_pos ) )
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{
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msg_Err( p_input, "STREAM_SET_POSITION failed (cannot resync)" );
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}
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}
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}
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input_ClockManageRef( p_input,
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p_input->stream.p_selected_program,
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p_sys->i_time * 9 / 100 );
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stream_Control( p_sys->s, STREAM_GET_POSITION, &i_pos );
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if( p_sys->i_data_size > 0 &&
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i_pos >= p_sys->i_data_pos + p_sys->i_data_size )
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{
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/* EOF */
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return 0;
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}
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if( ( p_pes = stream_PesPacket( p_sys->s, p_sys->i_frame_size ) ) == NULL )
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{
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msg_Warn( p_input, "cannot read data" );
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return 0;
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}
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p_pes->i_dts =
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p_pes->i_pts = input_ClockGetTS( p_input,
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p_input->stream.p_selected_program,
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p_sys->i_time * 9 / 100 );
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if( !p_sys->p_es->p_decoder_fifo )
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{
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msg_Err( p_input, "no audio decoder" );
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input_DeletePES( p_input->p_method_data, p_pes );
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return( -1 );
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}
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input_DecodePES( p_sys->p_es->p_decoder_fifo, p_pes );
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p_sys->i_time += p_sys->i_frame_length;
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return( 1 );
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}
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/*****************************************************************************
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* Close: frees unused data
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*****************************************************************************/
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static void Close ( vlc_object_t * p_this )
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{
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input_thread_t *p_input = (input_thread_t *)p_this;
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demux_sys_t *p_sys = p_input->p_demux_data;
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stream_Release( p_sys->s );
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free( p_sys->p_wf );
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free( p_sys );
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}
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/*****************************************************************************
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* Local functions
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*****************************************************************************/
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static int ChunkFind( input_thread_t *p_input,
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char *fcc, unsigned int *pi_size )
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{
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demux_sys_t *p_sys = p_input->p_demux_data;
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uint8_t *p_peek;
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for( ;; )
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{
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int i_size;
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if( stream_Peek( p_sys->s, &p_peek, 8 ) < 8 )
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{
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msg_Err( p_input, "cannot peek()" );
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return VLC_EGENERIC;
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}
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i_size = GetDWLE( p_peek + 4 );
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msg_Dbg( p_input, "Chunk: fcc=`%4.4s` size=%d", p_peek, i_size );
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if( !strncmp( p_peek, fcc, 4 ) )
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{
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if( pi_size )
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{
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*pi_size = i_size;
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}
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return VLC_SUCCESS;
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}
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i_size = __EVEN( i_size ) + 8;
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if( stream_Read( p_sys->s, NULL, i_size ) != i_size )
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{
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return VLC_EGENERIC;
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}
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}
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}
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static void FrameInfo_PCM( input_thread_t *p_input,
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unsigned int *pi_size,
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mtime_t *pi_length )
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{
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WAVEFORMATEX *p_wf = p_input->p_demux_data->p_wf;
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int i_samples;
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int i_bytes;
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int i_modulo;
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/* read samples for 50ms of */
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i_samples = __MAX( p_wf->nSamplesPerSec / 20, 1 );
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*pi_length = (mtime_t)1000000 *
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(mtime_t)i_samples /
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(mtime_t)p_wf->nSamplesPerSec;
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i_bytes = i_samples * p_wf->nChannels * ( (p_wf->wBitsPerSample + 7) / 8 );
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if( p_wf->nBlockAlign > 0 )
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{
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if( ( i_modulo = i_bytes % p_wf->nBlockAlign ) != 0 )
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{
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i_bytes += p_wf->nBlockAlign - i_modulo;
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}
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}
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*pi_size = i_bytes;
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}
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static void FrameInfo_MS_ADPCM( input_thread_t *p_input,
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unsigned int *pi_size,
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mtime_t *pi_length )
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{
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WAVEFORMATEX *p_wf = p_input->p_demux_data->p_wf;
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int i_samples;
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i_samples = 2 + 2 * ( p_wf->nBlockAlign -
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7 * p_wf->nChannels ) / p_wf->nChannels;
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*pi_length = (mtime_t)1000000 *
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(mtime_t)i_samples /
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(mtime_t)p_wf->nSamplesPerSec;
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*pi_size = p_wf->nBlockAlign;
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}
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static void FrameInfo_IMA_ADPCM( input_thread_t *p_input,
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unsigned int *pi_size,
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mtime_t *pi_length )
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{
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WAVEFORMATEX *p_wf = p_input->p_demux_data->p_wf;
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int i_samples;
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i_samples = 2 * ( p_wf->nBlockAlign -
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4 * p_wf->nChannels ) / p_wf->nChannels;
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*pi_length = (mtime_t)1000000 *
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(mtime_t)i_samples /
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(mtime_t)p_wf->nSamplesPerSec;
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*pi_size = p_wf->nBlockAlign;
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}
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