+++ /dev/null
-/*****************************************************************************
- * wav.c : wav file input module for vlc
- *****************************************************************************
- * Copyright (C) 2001 VideoLAN
- * $Id: wav.c,v 1.16 2003/05/21 10:02:55 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 <string.h> /* strdup() */
-
-#include <vlc/vlc.h>
-#include <vlc/input.h>
-
-#include <codecs.h>
-#include "wav.h"
-
-/*****************************************************************************
- * Local prototypes
- *****************************************************************************/
-static int WAVInit ( vlc_object_t * );
-static void __WAVEnd ( vlc_object_t * );
-static int WAVDemux ( input_thread_t * );
-static int WAVCallDemux ( input_thread_t * );
-
-#define WAVEnd(a) __WAVEnd(VLC_OBJECT(a))
-
-/*****************************************************************************
- * Module descriptor
- *****************************************************************************/
-vlc_module_begin();
- set_description( _("WAV demuxer") );
- set_capability( "demux", 142 );
- set_callbacks( WAVInit, __WAVEnd );
-vlc_module_end();
-
-/*****************************************************************************
- * Declaration of local function
- *****************************************************************************/
-
-#define FREE( p ) if( p ) free( p ); (p) = NULL
-
-#define __EVEN( x ) ( (x)%2 != 0 ) ? ((x)+1) : (x)
-
-/* Some functions to manipulate memory */
-static uint16_t GetWLE( uint8_t *p_buff )
-{
- return( (p_buff[0]) + ( p_buff[1] <<8 ) );
-}
-
-static uint32_t GetDWLE( uint8_t *p_buff )
-{
- return( p_buff[0] + ( p_buff[1] <<8 ) +
- ( p_buff[2] <<16 ) + ( p_buff[3] <<24 ) );
-}
-
-static uint32_t CreateDWLE( int a, int b, int c, int d )
-{
- return( a + ( b << 8 ) + ( c << 16 ) + ( d << 24 ) );
-}
-
-
-static off_t TellAbsolute( input_thread_t *p_input )
-{
- off_t i_pos;
-
- vlc_mutex_lock( &p_input->stream.stream_lock );
-
- i_pos= p_input->stream.p_selected_area->i_tell;
-
- vlc_mutex_unlock( &p_input->stream.stream_lock );
-
- return( i_pos );
-}
-
-/* return 1 if success, 0 if fail */
-static int ReadData( input_thread_t *p_input, uint8_t *p_buff, int i_size )
-{
- data_packet_t *p_data;
-
- int i_count = 0;
-
- if( !i_size )
- {
- return( 0 );
- }
-
- do
- {
- int i_read;
-
- i_read = input_SplitBuffer(p_input, &p_data, __MIN( i_size, 1024 ) );
- if( i_read <= 0 )
- {
- return( i_count );
- }
- memcpy( p_buff, p_data->p_payload_start, i_read );
- input_DeletePacket( p_input->p_method_data, p_data );
-
- p_buff += i_read;
- i_size -= i_read;
- i_count += i_read;
-
- } while( i_size );
-
- return( i_count );
-}
-
-static int SeekAbsolute( input_thread_t *p_input,
- off_t i_pos)
-{
- int i_skip;
-#if 0
- if( i_pos >= p_input->stream.p_selected_area->i_size )
- {
- return( 0 );
- }
-#endif
-
- i_skip = i_pos - TellAbsolute( p_input );
- if( i_skip == 0 )
- {
- return( VLC_SUCCESS );
- }
- if( i_skip < 0 && !p_input->stream.b_seekable )
- {
- return( VLC_EGENERIC );
- }
- else if( !p_input->stream.b_seekable ||
- ( i_skip > 0 && i_skip < 1024 && p_input->stream.i_method != INPUT_METHOD_FILE ) )
- {
- while( i_skip > 0 )
- {
- uint8_t dummy[1024];
- int i_read;
-
- i_read = ReadData( p_input, dummy, __MIN( i_skip, 1024 ) );
- if( i_read <= 0 )
- {
- return( VLC_EGENERIC );
- }
- i_skip -= i_read;
- }
- return( VLC_SUCCESS );
- }
- else
- {
- input_AccessReinit( p_input );
- p_input->pf_seek( p_input, i_pos );
- return( VLC_SUCCESS );
- }
-}
-
-static int SkipBytes( input_thread_t *p_input, int i_skip )
-{
- return( SeekAbsolute( p_input, TellAbsolute( p_input ) + i_skip ) );
-}
-
-static int ReadPES( input_thread_t *p_input,
- pes_packet_t **pp_pes,
- int i_size )
-{
- pes_packet_t *p_pes;
-
- *pp_pes = NULL;
-
- if( !(p_pes = input_NewPES( p_input->p_method_data )) )
- {
- msg_Err( p_input, "cannot allocate new PES" );
- return( 0 );
- }
-
- while( i_size > 0 )
- {
- data_packet_t *p_data;
- int i_read;
-
- if( (i_read = input_SplitBuffer( p_input,
- &p_data,
- __MIN( i_size, 1024 ) ) ) <= 0 )
- {
- input_DeletePES( p_input->p_method_data, p_pes );
- return( 0 );
- }
- if( !p_pes->p_first )
- {
- p_pes->p_first = p_data;
- p_pes->i_nb_data = 1;
- p_pes->i_pes_size = i_read;
- }
- else
- {
- p_pes->p_last->p_next = p_data;
- p_pes->i_nb_data++;
- p_pes->i_pes_size += i_read;
- }
- p_pes->p_last = p_data;
- i_size -= i_read;
- }
- *pp_pes = p_pes;
- return( 1 );
-}
-
-static int FindTag( input_thread_t *p_input, uint32_t i_tag )
-{
- uint32_t i_id;
- uint32_t i_size;
- uint8_t *p_peek;
-
- for( ;; )
- {
-
- if( input_Peek( p_input, &p_peek, 8 ) < 8 )
- {
- msg_Err( p_input, "cannot peek()" );
- return( 0 );
- }
-
- i_id = GetDWLE( p_peek );
- i_size = GetDWLE( p_peek + 4 );
-
- msg_Dbg( p_input, "FindTag: tag:%4.4s size:%d", (char*)&i_id, i_size );
- if( i_id == i_tag )
- {
- /* Yes, we have found the good tag */
- return( 1 );
- }
- if( SkipBytes( p_input, __EVEN( i_size ) + 8 ) )
- {
- return( 0 );
- }
- }
-}
-
-static int LoadTag_fmt( input_thread_t *p_input,
- demux_sys_t *p_demux )
-{
- uint8_t *p_peek;
- uint32_t i_size;
- WAVEFORMATEX *p_wf;
-
-
- if( input_Peek( p_input, &p_peek , 8 ) < 8 )
- {
- return( 0 );
- }
-
- p_demux->i_wf = i_size = GetDWLE( p_peek + 4 );
- SkipBytes( p_input, 8 );
- if( i_size < 16 )
- {
- SkipBytes( p_input, i_size );
- return( 0 );
- }
- p_wf = p_demux->p_wf = malloc( __MAX( i_size, sizeof( WAVEFORMATEX) ) );
- ReadData( p_input, (uint8_t*)p_wf, __EVEN( i_size ) );
-
- p_wf->wFormatTag = GetWLE( (uint8_t*)&p_demux->p_wf->wFormatTag );
- p_wf->nChannels = GetWLE( (uint8_t*)&p_demux->p_wf->nChannels );
- p_wf->nSamplesPerSec = GetWLE( (uint8_t*)&p_demux->p_wf->nSamplesPerSec );
- p_wf->nAvgBytesPerSec = GetWLE( (uint8_t*)&p_demux->p_wf->nAvgBytesPerSec );
- p_wf->nBlockAlign = GetWLE( (uint8_t*)&p_demux->p_wf->nBlockAlign );
- p_wf->wBitsPerSample = GetWLE( (uint8_t*)&p_demux->p_wf->wBitsPerSample );
- if( i_size >= sizeof( WAVEFORMATEX) )
- {
- p_wf->cbSize = GetWLE( (uint8_t*)&p_demux->p_wf->cbSize );
- }
- else
- {
- p_wf->cbSize = 0;
- }
-
- msg_Dbg( p_input, "loaded \"fmt \" chunk" );
- return( 1 );
-}
-
-static int PCM_GetFrame( input_thread_t *p_input,
- WAVEFORMATEX *p_wf,
- pes_packet_t **pp_pes,
- mtime_t *pi_length )
-{
- 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;
- }
- }
-
- return( ReadPES( p_input, pp_pes, i_bytes ) );
-}
-
-static int MS_ADPCM_GetFrame( input_thread_t *p_input,
- WAVEFORMATEX *p_wf,
- pes_packet_t **pp_pes,
- mtime_t *pi_length )
-{
- 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;
-
- return( ReadPES( p_input, pp_pes, p_wf->nBlockAlign ) );
-}
-
-static int IMA_ADPCM_GetFrame( input_thread_t *p_input,
- WAVEFORMATEX *p_wf,
- pes_packet_t **pp_pes,
- mtime_t *pi_length )
-{
- 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;
-
- return( ReadPES( p_input, pp_pes, p_wf->nBlockAlign ) );
-}
-
-/*****************************************************************************
- * WAVInit: check file and initializes structures
- *****************************************************************************/
-static int WAVInit( vlc_object_t * p_this )
-{
- input_thread_t *p_input = (input_thread_t *)p_this;
- uint8_t *p_peek;
- uint32_t i_size;
-
- demux_sys_t *p_demux;
-
-
-
- /* Initialize access plug-in structures. */
- if( p_input->i_mtu == 0 )
- {
- /* Improve speed. */
- p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE ;
- }
-
- /* a little test to see if it's a wav file */
- if( input_Peek( p_input, &p_peek, 12 ) < 12 )
- {
- msg_Warn( p_input, "WAV plugin discarded (cannot peek)" );
- return( -1 );
- }
-
- if( ( GetDWLE( p_peek ) != CreateDWLE( 'R', 'I', 'F', 'F' ) )||
- ( GetDWLE( p_peek + 8 ) != CreateDWLE( 'W', 'A', 'V', 'E' ) ) )
- {
- msg_Warn( p_input, "WAV plugin discarded (not a valid file)" );
- return( -1 );
- }
- i_size = GetDWLE( p_peek + 4 );
- SkipBytes( p_input, 12 );
-
- if( !FindTag( p_input, CreateDWLE( 'f', 'm', 't' ,' ' ) ) )
- {
- msg_Err( p_input, "cannot find \"fmt \" tag" );
- return( -1 );
- }
-
- /* create our structure that will contains all data */
- if( !( p_input->p_demux_data =
- p_demux = malloc( sizeof( demux_sys_t ) ) ) )
- {
- msg_Err( p_input, "out of memory" );
- return( -1 );
- }
- memset( p_demux, 0, sizeof( demux_sys_t ) );
-
- /* Load WAVEFORMATEX header */
- if( !LoadTag_fmt( p_input, p_demux ) )
- {
- msg_Err( p_input, "cannot load \"fmt \" tag" );
- FREE( p_demux );
- return( -1 );
- }
- msg_Dbg( p_input, "format:0x%4.4x channels:%d %dHz %dKo/s blockalign:%d bits/samples:%d extra size:%d",
- p_demux->p_wf->wFormatTag,
- p_demux->p_wf->nChannels,
- p_demux->p_wf->nSamplesPerSec,
- p_demux->p_wf->nAvgBytesPerSec / 1024,
- p_demux->p_wf->nBlockAlign,
- p_demux->p_wf->wBitsPerSample,
- p_demux->p_wf->cbSize );
-
- if( !FindTag( p_input, CreateDWLE( 'd', 'a', 't', 'a' ) ) )
- {
- msg_Err( p_input, "cannot find \"data\" tag" );
- FREE( p_demux->p_wf );
- FREE( p_demux );
- return( -1 );
- }
- if( input_Peek( p_input, &p_peek, 8 ) < 8 )
- {
- msg_Warn( p_input, "WAV plugin discarded (cannot peek)" );
- FREE( p_demux->p_wf );
- FREE( p_demux );
- return( -1 );
- }
-
- p_demux->i_data_pos = TellAbsolute( p_input ) + 8;
- p_demux->i_data_size = GetDWLE( p_peek + 4 );
- SkipBytes( p_input, 8 );
-
- /* XXX p_demux->psz_demux shouldn't be NULL ! */
- switch( p_demux->p_wf->wFormatTag )
- {
- case( WAVE_FORMAT_PCM ):
- msg_Dbg( p_input,"found raw pcm audio format" );
- p_demux->i_fourcc = VLC_FOURCC( 'a', 'r', 'a', 'w' );
- p_demux->GetFrame = PCM_GetFrame;
- p_demux->psz_demux = strdup( "" );
- break;
- case( WAVE_FORMAT_MULAW ):
- msg_Dbg( p_input,"found mulaw pcm audio format" );
- p_demux->i_fourcc = VLC_FOURCC( 'u', 'l', 'a', 'w' );
- p_demux->GetFrame = PCM_GetFrame;
- p_demux->psz_demux = strdup( "" );
- break;
- case( WAVE_FORMAT_ALAW ):
- msg_Dbg( p_input,"found alaw pcm audio format" );
- p_demux->i_fourcc = VLC_FOURCC( 'a', 'l', 'a', 'w' );
- p_demux->GetFrame = PCM_GetFrame;
- p_demux->psz_demux = strdup( "" );
- break;
- case( WAVE_FORMAT_MPEG ):
- case( WAVE_FORMAT_MPEGLAYER3 ):
- msg_Dbg( p_input, "found mpeg audio format" );
- p_demux->i_fourcc = VLC_FOURCC( 'm', 'p', 'g', 'a' );
- p_demux->GetFrame = NULL;
- p_demux->psz_demux = strdup( "mpegaudio" );
- break;
- case( WAVE_FORMAT_A52 ):
- msg_Dbg( p_input,"found a52 audio format" );
- p_demux->i_fourcc = VLC_FOURCC( 'a', '5', '2', ' ' );
- p_demux->GetFrame = NULL;
- p_demux->psz_demux = strdup( "a52" );
- break;
- case( WAVE_FORMAT_ADPCM ):
- msg_Dbg( p_input, "found ms adpcm audio format" );
- p_demux->i_fourcc = VLC_FOURCC( 'm', 's', 0x00, 0x02 );
- p_demux->GetFrame = MS_ADPCM_GetFrame;
- p_demux->psz_demux = strdup( "" );
- break;
- case( WAVE_FORMAT_IMA_ADPCM ):
- msg_Dbg( p_input, "found ima adpcm audio format" );
- p_demux->i_fourcc = VLC_FOURCC( 'm', 's', 0x00, 0x11 );
- p_demux->GetFrame = IMA_ADPCM_GetFrame;
- p_demux->psz_demux = strdup( "" );
- break;
- default:
- msg_Warn( p_input,"unrecognize audio format(0x%x)",
- p_demux->p_wf->wFormatTag );
- p_demux->i_fourcc =
- VLC_FOURCC( 'm', 's',
- (p_demux->p_wf->wFormatTag >> 8)&0xff,
- (p_demux->p_wf->wFormatTag )&0xff);
- p_demux->GetFrame = NULL;
- p_demux->psz_demux = strdup( "" );
- break;
- }
-
- if( p_demux->GetFrame )
- {
- msg_Dbg( p_input, "using internal demux" );
-
- p_input->pf_demux = WAVDemux;
- p_input->p_demux_data = p_demux;
-
- /* 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" );
- // FIXME
- return( -1 );
- }
- if( input_AddProgram( p_input, 0, 0) == NULL )
- {
- vlc_mutex_unlock( &p_input->stream.stream_lock );
- msg_Err( p_input, "cannot add program" );
- // FIXME
- return( -1 );
- }
- p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
- p_input->stream.i_mux_rate = 0 ; /* FIXME */
-
- p_demux->p_es = input_AddES( p_input,
- p_input->stream.p_selected_program,
- 1, AUDIO_ES, NULL, 0 );
- p_demux->p_es->i_stream_id = 1;
- p_demux->p_es->i_fourcc = p_demux->i_fourcc;
- p_demux->p_es->p_waveformatex = malloc( p_demux->i_wf );
- memcpy( p_demux->p_es->p_waveformatex, p_demux->p_wf, p_demux->i_wf );
-
- input_SelectES( p_input, p_demux->p_es );
-
- p_input->stream.p_selected_program->b_is_ok = 1;
- vlc_mutex_unlock( &p_input->stream.stream_lock );
- }
- else
- {
- char *psz_sav;
- /* call an external demux */
- msg_Warn( p_input, "unsupported formattag, using external demux" );
-
- psz_sav = p_input->psz_demux;
- p_input->psz_demux = p_demux->psz_demux;
-
- p_demux->p_demux = module_Need( p_input, "demux", NULL );
-
- p_input->psz_demux = psz_sav;
-
- if( !p_demux->p_demux )
- {
- msg_Err( p_input,
- "cannot get external demux for formattag 0x%x",
- p_demux->p_wf->wFormatTag );
- FREE( p_demux->psz_demux );
- FREE( p_demux->p_wf );
- FREE( p_demux );
- return( -1 );
- }
- /* save value and switch back */
- p_demux->pf_demux = p_input->pf_demux;
- p_demux->p_demux_data = p_input->p_demux_data;
-
- p_input->pf_demux = WAVCallDemux;
- p_input->p_demux_data = p_demux;
-
- }
-
- return( 0 );
-}
-
-/*****************************************************************************
- * WAVCallDemux: call true demux
- *****************************************************************************
- * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
- *****************************************************************************/
-static int WAVCallDemux( input_thread_t *p_input )
-{
- demux_sys_t *p_demux = p_input->p_demux_data;
- int i_status;
- char *psz_sav;
-
- /* save context */
- psz_sav = p_input->psz_demux;
-
- /* switch context */
- p_input->pf_demux = p_demux->pf_demux;
- p_input->p_demux_data = p_demux->p_demux_data;
- p_input->psz_demux = p_demux->psz_demux;
-
- /* call demux */
- i_status = p_input->pf_demux( p_input );
-
- /* save (new?) state */
- p_demux->pf_demux = p_input->pf_demux;
- p_demux->p_demux_data = p_input->p_demux_data;
-
- /* switch back */
- p_input->psz_demux = psz_sav;
- p_input->pf_demux = WAVCallDemux;
- p_input->p_demux_data = p_demux;
-
- return( i_status );
-}
-
-/*****************************************************************************
- * WAVDemux: read packet and send them to decoders
- *****************************************************************************
- * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
- *****************************************************************************/
-static int WAVDemux( input_thread_t *p_input )
-{
- demux_sys_t *p_demux = p_input->p_demux_data;
- pes_packet_t *p_pes;
- mtime_t i_length;
-
- if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
- {
- off_t i_offset;
-
- i_offset = TellAbsolute( p_input ) - p_demux->i_data_pos;
- if( i_offset < 0 )
- {
- i_offset = 0;
- }
- if( p_demux->p_wf->nBlockAlign != 0 )
- {
- i_offset += p_demux->p_wf->nBlockAlign -
- i_offset % p_demux->p_wf->nBlockAlign;
- }
- SeekAbsolute( p_input, p_demux->i_data_pos + i_offset );
- }
-
- input_ClockManageRef( p_input,
- p_input->stream.p_selected_program,
- p_demux->i_pcr );
-
- if( TellAbsolute( p_input )
- >= (off_t)(p_demux->i_data_pos + p_demux->i_data_size) )
- {
- return( 0 ); // EOF
- }
-
- if( !p_demux->GetFrame( p_input, p_demux->p_wf, &p_pes, &i_length ) )
- {
- msg_Warn( p_input, "failed to get one frame" );
- return( 0 );
- }
-
- p_pes->i_dts =
- p_pes->i_pts = input_ClockGetTS( p_input,
- p_input->stream.p_selected_program,
- p_demux->i_pcr );
-
- if( !p_demux->p_es->p_decoder_fifo )
- {
- msg_Err( p_input, "no audio decoder" );
- input_DeletePES( p_input->p_method_data, p_pes );
- return( -1 );
- }
- else
- {
- input_DecodePES( p_demux->p_es->p_decoder_fifo, p_pes );
- }
-
- p_demux->i_pcr += i_length * 9 / 100;
- return( 1 );
-}
-
-/*****************************************************************************
- * WAVEnd: frees unused data
- *****************************************************************************/
-static void __WAVEnd ( vlc_object_t * p_this )
-{
- input_thread_t * p_input = (input_thread_t *)p_this;
- demux_sys_t *p_demux = p_input->p_demux_data;
-
- FREE( p_demux->p_wf );
- FREE( p_demux->psz_demux );
-
- if( p_demux->p_demux )
- {
- char *psz_sav;
-
- /* save context */
- psz_sav = p_input->psz_demux;
-
- /* switch context */
- p_input->pf_demux = p_demux->pf_demux;
- p_input->p_demux_data = p_demux->p_demux_data;
- p_input->psz_demux = p_demux->psz_demux;
-
- /* unload module */
- module_Unneed( p_input, p_demux->p_demux );
-
- /* switch back */
- p_input->psz_demux = psz_sav;
- p_input->p_demux_data = p_demux;
- }
-
- FREE( p_input->p_demux_data );
-}
-
projects / vlc / commitdiff