--- /dev/null
+/*****************************************************************************
+ * au.c : au file input module for vlc
+ *****************************************************************************
+ * Copyright (C) 2001 VideoLAN
+ * $Id: au.c,v 1.1 2003/03/11 07:03:16 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>
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int AUInit ( vlc_object_t * );
+static void AUEnd ( vlc_object_t * );
+static int AUDemux ( input_thread_t * );
+
+static int AUDemuxPCM ( input_thread_t * );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin();
+ set_description( _("AU demuxer") );
+ set_capability( "demux", 142 );
+ set_callbacks( AUInit, AUEnd );
+vlc_module_end();
+
+
+#define AUDIO_FILE_ENCODING_MULAW_8 1 /* 8-bit ISDN u-law */
+#define AUDIO_FILE_ENCODING_LINEAR_8 2 /* 8-bit linear PCM */
+#define AUDIO_FILE_ENCODING_LINEAR_16 3 /* 16-bit linear PCM */
+#define AUDIO_FILE_ENCODING_LINEAR_24 4 /* 24-bit linear PCM */
+#define AUDIO_FILE_ENCODING_LINEAR_32 5 /* 32-bit linear PCM */
+#define AUDIO_FILE_ENCODING_FLOAT 6 /* 32-bit IEEE floating point */
+#define AUDIO_FILE_ENCODING_DOUBLE 7 /* 64-bit IEEE floating point */
+#define AUDIO_FILE_ENCODING_ADPCM_G721 23 /* 4-bit CCITT g.721 ADPCM */
+#define AUDIO_FILE_ENCODING_ADPCM_G722 24 /* CCITT g.722 ADPCM */
+#define AUDIO_FILE_ENCODING_ADPCM_G723_3 25 /* CCITT g.723 3-bit ADPCM */
+#define AUDIO_FILE_ENCODING_ADPCM_G723_5 26 /* CCITT g.723 5-bit ADPCM */
+#define AUDIO_FILE_ENCODING_ALAW_8 27 /* 8-bit ISDN A-law */
+
+typedef struct
+{
+ uint32_t i_header_size;
+ uint32_t i_data_size;
+ uint32_t i_encoding;
+ uint32_t i_sample_rate;
+ uint32_t i_channels;
+} au_t;
+
+#define AU_DEMUX_PCM 0x01
+#define AU_DEMUX_ADPCM 0x02
+struct demux_sys_t
+{
+ au_t au;
+ WAVEFORMATEX wf;
+
+ mtime_t i_time;
+
+ es_descriptor_t *p_es;
+
+ int i_demux;
+};
+
+/*****************************************************************************
+ * Declaration of local function
+ *****************************************************************************/
+
+#define FREE( p ) if( p ) { free( p ); (p) = NULL; }
+
+static uint32_t GetDWBE( uint8_t *p_buff )
+{
+ return( ( p_buff[0] << 24 ) + ( p_buff[1] << 16 ) +
+ ( p_buff[2] << 8 ) + p_buff[3] );
+}
+
+
+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;
+
+ 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( VLC_EGENERIC );
+ }
+
+ 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( VLC_EGENERIC );
+ }
+ 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( VLC_SUCCESS );
+}
+
+/*****************************************************************************
+ * AUInit: check file and initializes structures
+ *****************************************************************************/
+static int AUInit( vlc_object_t * p_this )
+{
+ input_thread_t *p_input = (input_thread_t *)p_this;
+ uint8_t *p_peek;
+
+ au_t au;
+ WAVEFORMATEX wf;
+ vlc_fourcc_t i_codec;
+
+ demux_sys_t *p_demux;
+ es_descriptor_t *p_es;
+
+
+ /* 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, 24 ) < 24 )
+ {
+ msg_Warn( p_input, "AU plugin discarded (cannot peek)" );
+ return( -1 );
+ }
+
+ /* read header */
+ if( strcmp( p_peek, ".snd" ) )
+ {
+ msg_Warn( p_input, "AU plugin discarded (not a valid file)" );
+ return( VLC_EGENERIC );
+ }
+ au.i_header_size = GetDWBE( &p_peek[0x04] );
+ au.i_data_size = GetDWBE( &p_peek[0x08] );
+ au.i_encoding = GetDWBE( &p_peek[0x0c] );
+ au.i_sample_rate = GetDWBE( &p_peek[0x10] );
+ au.i_channels = GetDWBE( &p_peek[0x14] );
+ msg_Dbg( p_input,
+ "au file: header_size=%d data_size=%d encoding=0x%x sample_rate=%d channels=%d",
+ au.i_header_size,
+ au.i_data_size,
+ au.i_encoding,
+ au.i_sample_rate,
+ au.i_channels );
+ if( au.i_header_size < 24 )
+ {
+ msg_Warn( p_input, "AU plugin discarded (not a valid file)" );
+ return( VLC_EGENERIC );
+ }
+
+ /* Create WAVEFORMATEX structure */
+ wf.nChannels = au.i_channels;
+ wf.nSamplesPerSec= au.i_sample_rate;
+ wf.cbSize = 0;
+
+ switch( au.i_encoding )
+ {
+ case AUDIO_FILE_ENCODING_MULAW_8: /* 8-bit ISDN u-law */
+ wf.wFormatTag = WAVE_FORMAT_MULAW; // FIXME ??
+ wf.wBitsPerSample = 8;
+ wf.nBlockAlign = 1 * wf.nChannels;
+ i_codec = VLC_FOURCC( 'u','l','a','w' );
+ break;
+ case AUDIO_FILE_ENCODING_LINEAR_8: /* 8-bit linear PCM */
+ wf.wFormatTag = WAVE_FORMAT_PCM;
+ wf.wBitsPerSample = 8;
+ wf.nBlockAlign = 1 * wf.nChannels;
+ i_codec = VLC_FOURCC( 't','w','o','s' );
+ break;
+
+ case AUDIO_FILE_ENCODING_LINEAR_16: /* 16-bit linear PCM */
+ wf.wFormatTag = WAVE_FORMAT_PCM;
+ wf.wBitsPerSample = 16;
+ wf.nBlockAlign = 2 * wf.nChannels;
+ i_codec = VLC_FOURCC( 't','w','o','s' );
+ break;
+
+ case AUDIO_FILE_ENCODING_LINEAR_24: /* 24-bit linear PCM */
+ wf.wFormatTag = WAVE_FORMAT_PCM;
+ wf.wBitsPerSample = 24;
+ wf.nBlockAlign = 3 * wf.nChannels;
+ i_codec = VLC_FOURCC( 't','w','o','s' );
+ break;
+
+ case AUDIO_FILE_ENCODING_LINEAR_32: /* 32-bit linear PCM */
+ wf.wFormatTag = WAVE_FORMAT_PCM;
+ wf.wBitsPerSample = 32;
+ wf.nBlockAlign = 4 * wf.nChannels;
+ i_codec = VLC_FOURCC( 't','w','o','s' );
+ break;
+
+ case AUDIO_FILE_ENCODING_FLOAT: /* 32-bit IEEE floating point */
+ wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
+ wf.wBitsPerSample = 32;
+ wf.nBlockAlign = 4 * wf.nChannels;
+ i_codec = VLC_FOURCC( 'a', 'u', 0, AUDIO_FILE_ENCODING_FLOAT );
+ break;
+
+ case AUDIO_FILE_ENCODING_DOUBLE: /* 64-bit IEEE floating point */
+ wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
+ wf.wBitsPerSample = 64;
+ wf.nBlockAlign = 8 * wf.nChannels;
+ i_codec = VLC_FOURCC( 'a', 'u', 0, AUDIO_FILE_ENCODING_DOUBLE );
+ break;
+
+ case AUDIO_FILE_ENCODING_ADPCM_G721: /* 4-bit CCITT g.721 ADPCM */
+ wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
+ wf.wBitsPerSample = 0;
+ wf.nBlockAlign = 0 * wf.nChannels;
+ i_codec = VLC_FOURCC( 'a', 'u', 0, AUDIO_FILE_ENCODING_ADPCM_G721 );
+ break;
+
+ case AUDIO_FILE_ENCODING_ADPCM_G722: /* CCITT g.722 ADPCM */
+ wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
+ wf.wBitsPerSample = 0;
+ wf.nBlockAlign = 0 * wf.nChannels;
+ i_codec = VLC_FOURCC( 'a', 'u', 0, AUDIO_FILE_ENCODING_ADPCM_G722 );
+ break;
+
+ case AUDIO_FILE_ENCODING_ADPCM_G723_3: /* CCITT g.723 3-bit ADPCM */
+ wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
+ wf.wBitsPerSample = 0;
+ wf.nBlockAlign = 0 * wf.nChannels;
+ i_codec = VLC_FOURCC( 'a', 'u', 0, AUDIO_FILE_ENCODING_ADPCM_G723_3 );
+ break;
+
+ case AUDIO_FILE_ENCODING_ADPCM_G723_5: /* CCITT g.723 5-bit ADPCM */
+ wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
+ wf.wBitsPerSample = 0;
+ wf.nBlockAlign = 0 * wf.nChannels;
+ i_codec = VLC_FOURCC( 'a', 'u', 0, AUDIO_FILE_ENCODING_ADPCM_G723_5 );
+ break;
+
+ case AUDIO_FILE_ENCODING_ALAW_8: /* 8-bit ISDN A-law */
+ wf.wFormatTag = WAVE_FORMAT_ALAW; // FIXME ??
+ wf.wBitsPerSample = 8;
+ wf.nBlockAlign = 1 * wf.nChannels;
+ i_codec = VLC_FOURCC( 'a','l','a','w' );
+ break;
+
+ default:
+ msg_Warn( p_input, "unknow encoding=0x%x", au.i_encoding );
+ wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
+ wf.wBitsPerSample = 0;
+ wf.nBlockAlign = 0 * wf.nChannels;
+ i_codec = VLC_FOURCC( 'a','u', 0, au.i_encoding );
+ break;
+ }
+ wf.nAvgBytesPerSec = wf.nSamplesPerSec * wf.nChannels * wf.wBitsPerSample / 8;
+
+ /* 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" );
+ return( VLC_EGENERIC );
+ }
+ if( input_AddProgram( p_input, 0, 0) == NULL )
+ {
+ vlc_mutex_unlock( &p_input->stream.stream_lock );
+ msg_Err( p_input, "cannot add program" );
+ return( VLC_EGENERIC );
+ }
+
+ p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
+ p_input->stream.i_mux_rate = wf.nAvgBytesPerSec / 50;
+
+ p_es = input_AddES( p_input,
+ p_input->stream.p_selected_program,
+ 0x01,
+ 0 );
+
+ p_es->i_stream_id = 0x01;
+ p_es->i_cat = AUDIO_ES;
+ p_es->i_fourcc = i_codec;
+ p_es->p_waveformatex= malloc( sizeof( WAVEFORMATEX ) );
+ memcpy( p_es->p_waveformatex,
+ &wf,
+ sizeof( WAVEFORMATEX ) );
+
+ input_SelectES( p_input, p_es );
+ p_input->stream.p_selected_program->b_is_ok = 1;
+ vlc_mutex_unlock( &p_input->stream.stream_lock );
+
+ /* create our structure that will contains all data */
+ if( ( p_demux = malloc( sizeof( demux_sys_t ) ) ) == NULL )
+ {
+ msg_Err( p_input, "out of memory" );
+ return( VLC_EGENERIC );
+ }
+ p_demux->p_es = p_es;
+ p_demux->i_time = 0;
+ memcpy( &p_demux->au, &au, sizeof( au_t ) );
+ memcpy( &p_demux->wf, &wf, sizeof( WAVEFORMATEX ) );
+ switch( au.i_encoding )
+ {
+ case AUDIO_FILE_ENCODING_MULAW_8:
+ case AUDIO_FILE_ENCODING_LINEAR_8:
+ case AUDIO_FILE_ENCODING_LINEAR_16:
+ case AUDIO_FILE_ENCODING_LINEAR_24:
+ case AUDIO_FILE_ENCODING_LINEAR_32:
+ case AUDIO_FILE_ENCODING_FLOAT:
+ case AUDIO_FILE_ENCODING_DOUBLE:
+ case AUDIO_FILE_ENCODING_ALAW_8:
+ p_demux->i_demux = AU_DEMUX_PCM;
+ break;
+
+ case AUDIO_FILE_ENCODING_ADPCM_G721:
+ case AUDIO_FILE_ENCODING_ADPCM_G722:
+ case AUDIO_FILE_ENCODING_ADPCM_G723_3:
+ case AUDIO_FILE_ENCODING_ADPCM_G723_5:
+ p_demux->i_demux = AU_DEMUX_ADPCM;
+ break;
+
+ default:
+ p_demux->i_demux = 0;
+ break;
+ }
+
+ p_input->p_demux_data = p_demux;
+ p_input->pf_demux = AUDemux;
+
+ /* skip header*/
+ SkipBytes( p_input, au.i_header_size );
+
+ return( VLC_SUCCESS );
+}
+
+/*****************************************************************************
+ * AUDemux: read packet and send them to decoders
+ *****************************************************************************
+ * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
+ *****************************************************************************/
+static int AUDemux( input_thread_t *p_input )
+{
+ demux_sys_t *p_demux = p_input->p_demux_data;
+
+ if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
+ {
+ off_t i_offset;
+
+ i_offset = TellAbsolute( p_input ) - p_demux->au.i_header_size;
+ if( i_offset < 0 )
+ {
+ i_offset = 0;
+ }
+ if( p_demux->wf.nBlockAlign != 0 )
+ {
+ i_offset += p_demux->wf.nBlockAlign -
+ i_offset % p_demux->wf.nBlockAlign;
+ }
+ SeekAbsolute( p_input, p_demux->au.i_header_size + i_offset );
+ }
+
+ input_ClockManageRef( p_input,
+ p_input->stream.p_selected_program,
+ p_demux->i_time * 9 / 100 );
+
+ switch( p_demux->i_demux )
+ {
+ case AU_DEMUX_PCM:
+ return( AUDemuxPCM( p_input ) );
+ case AU_DEMUX_ADPCM:
+ default:
+ msg_Err( p_input, "Internal error (p_demux->i_demux invalid/unsported)" );
+ return( 0 );
+ }
+}
+static int AUDemuxPCM( input_thread_t *p_input )
+{
+ demux_sys_t *p_demux = p_input->p_demux_data;
+ pes_packet_t *p_pes;
+
+ int i_samples;
+
+ int i_bytes;
+ int i_modulo;
+
+ /* read samples for 50ms of */
+ i_samples = __MAX( p_demux->wf.nSamplesPerSec / 20, 1 );
+
+
+
+ i_bytes = i_samples * p_demux->wf.nChannels * ( (p_demux->wf.wBitsPerSample + 7) / 8 );
+
+ if( p_demux->wf.nBlockAlign > 0 )
+ {
+ if( ( i_modulo = i_bytes % p_demux->wf.nBlockAlign ) != 0 )
+ {
+ i_bytes += p_demux->wf.nBlockAlign - i_modulo;
+ }
+ }
+
+ if( ReadPES( p_input, &p_pes, i_bytes ) )
+ {
+ 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_time * 9 / 100 );
+
+ 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_time += (mtime_t)1000000 *
+ (mtime_t)i_samples /
+ (mtime_t)p_demux->wf.nSamplesPerSec;
+
+ return( 1 );
+}
+
+/*****************************************************************************
+ * AUEnd: frees unused data
+ *****************************************************************************/
+static void AUEnd ( vlc_object_t * p_this )
+{
+ input_thread_t * p_input = (input_thread_t *)p_this;
+
+ FREE( p_input->p_demux_data );
+}
+
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