--- /dev/null
+/*****************************************************************************
+ * voc.c : Creative Voice File (.VOC) demux module for vlc
+ *****************************************************************************
+ * Copyright (C) 2005 VideoLAN
+ * $Id: xa.c 10182 2005-03-07 15:04:53Z courmisch $
+ *
+ * Authors: Remi Denis-Courmont <rem # 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 <vlc/aout.h>
+
+#include <codecs.h>
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+static int Open ( vlc_object_t * );
+static void Close( vlc_object_t * );
+
+vlc_module_begin();
+ set_description( _("VOC demuxer") );
+ set_category( CAT_INPUT );
+ set_subcategory( SUBCAT_INPUT_DEMUX );
+ set_capability( "demux2", 10 );
+ set_callbacks( Open, Close );
+vlc_module_end();
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Demux ( demux_t * );
+static int Control( demux_t *, int i_query, va_list args );
+
+struct demux_sys_t
+{
+ es_format_t fmt;
+ es_out_id_t *p_es;
+
+#if 0
+ int64_t i_data_offset;
+ unsigned int i_data_size;
+#endif
+
+ int32_t i_block_size;
+
+ date_t pts;
+};
+
+static const char ct_header[] = "Creative Voice File\x1a";
+
+/*****************************************************************************
+ * Open: check file and initializes structures
+ *****************************************************************************/
+static int Open( vlc_object_t * p_this )
+{
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys;
+ uint8_t *p_buf, buf[8];
+ uint16_t i_data_offset, i_version;
+
+ if( stream_Peek( p_demux->s, &p_buf, 26 ) < 26 )
+ return VLC_EGENERIC;
+
+ if( memcmp( p_buf, ct_header, 20 ) )
+ return VLC_EGENERIC;
+ p_buf += 20;
+
+ i_data_offset = GetWLE( p_buf );
+ if ( i_data_offset < 26 /* not enough room for full VOC header */ )
+ return VLC_EGENERIC;
+ p_buf += 2;
+
+ i_version = GetWLE( p_buf );
+ if( ( i_version != 0x10A ) && ( i_version != 0x114 ) )
+ return VLC_EGENERIC; /* unknown VOC version */
+ p_buf += 2;
+
+ if( GetWLE( p_buf ) != (uint16_t)(0x1234 + ~i_version) )
+ return VLC_EGENERIC;
+
+ /* We have a valid VOC header */
+ msg_Dbg( p_demux, "CT Voice file v%d.%d", i_version >> 8,
+ i_version & 0xff );
+
+ /* skip VOC header */
+ if( stream_Read( p_demux->s, NULL, i_data_offset ) < i_data_offset )
+ return VLC_EGENERIC;
+
+ /* read first block header */
+ /* FIXME: we only support one-block files at the moment */
+ if( stream_Read( p_demux->s, buf, 4 ) < 4 )
+ return VLC_EGENERIC;
+
+ p_demux->pf_demux = Demux;
+ p_demux->pf_control = Control;
+ p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
+
+ p_sys->i_block_size = GetDWLE( buf ) >> 8;
+ msg_Dbg( p_demux, "block size: %u bytes", p_sys->i_block_size );
+
+ es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
+
+ switch( *buf )
+ {
+ case 1:
+ if( p_sys->i_block_size < 2 )
+ goto error;
+ p_sys->i_block_size -= 2;
+
+ if( stream_Read( p_demux->s, buf, 2 ) < 2 )
+ goto error;
+
+ p_sys->fmt.audio.i_rate = 1000000L / (256L - buf[0]);
+ if( buf[1] )
+ {
+ msg_Err( p_demux, "Unsupported compression" );
+ goto error;
+ }
+
+ p_sys->fmt.i_codec = VLC_FOURCC('u','8',' ',' ');
+ p_sys->fmt.audio.i_bytes_per_frame = 1;
+ p_sys->fmt.audio.i_frame_length = 1;
+ p_sys->fmt.audio.i_channels = 1;
+ p_sys->fmt.audio.i_blockalign = 1;
+ p_sys->fmt.audio.i_bitspersample = 8;
+ p_sys->fmt.i_bitrate = p_sys->fmt.audio.i_rate * 8;
+ break;
+
+ case 9:
+ if( p_sys->i_block_size < 12 )
+ goto error;
+ p_sys->i_block_size -= 12;
+
+ if( ( stream_Read( p_demux->s, buf, 8 ) < 8 )
+ || ( stream_Read( p_demux->s, NULL, 4 ) < 4 ) )
+ goto error;
+
+ p_sys->fmt.audio.i_rate = GetDWLE( buf );
+ p_sys->fmt.audio.i_bitspersample = buf[4];
+ p_sys->fmt.audio.i_channels = buf[5];
+
+ switch( GetWLE( &buf[6] ) ) /* format */
+ {
+ case 0x0000: /* PCM */
+ switch( p_sys->fmt.audio.i_bitspersample )
+ {
+ case 8:
+ p_sys->fmt.i_codec = VLC_FOURCC('u','8',' ',' ');
+ break;
+
+ case 16:
+ p_sys->fmt.i_codec = VLC_FOURCC('u','1','6','l');
+ break;
+
+ default:
+ msg_Err( p_demux, "Unsupported bit res.: %u bits",
+ p_sys->fmt.audio.i_bitspersample );
+ return VLC_EGENERIC;
+ }
+ break;
+
+ case 0x0004: /* signed */
+ switch( p_sys->fmt.audio.i_bitspersample )
+ {
+ case 8:
+ p_sys->fmt.i_codec = VLC_FOURCC('s','8',' ',' ');
+ break;
+
+ case 16:
+ p_sys->fmt.i_codec = VLC_FOURCC('s','1','6','l');
+ break;
+
+ default:
+ msg_Err( p_demux, "Unsupported bit res.: %u bits",
+ p_sys->fmt.audio.i_bitspersample );
+ return VLC_EGENERIC;
+ }
+ break;
+
+ default:
+ msg_Err( p_demux, "Unsupported compression" );
+ goto error;
+ }
+
+ p_sys->fmt.audio.i_bytes_per_frame = p_sys->fmt.audio.i_channels
+ * (p_sys->fmt.audio.i_bitspersample / 8);
+ p_sys->fmt.audio.i_frame_length = 1;
+ p_sys->fmt.audio.i_blockalign = p_sys->fmt.audio.i_bytes_per_frame;
+ p_sys->fmt.i_bitrate = 8 * p_sys->fmt.audio.i_rate
+ * p_sys->fmt.audio.i_bytes_per_frame;
+ break;
+
+ default:
+ msg_Dbg( p_demux, "Unsupported block type %u", (unsigned)*p_buf);
+ return VLC_EGENERIC;
+ }
+ p_sys->fmt.i_extra = 0;
+ p_sys->fmt.p_extra = NULL;
+
+ msg_Dbg( p_demux, "fourcc: %4.4s, channels: %d, "
+ "freq: %d Hz, bitrate: %dKo/s, blockalign: %d, bits/samples: %d",
+ (char *)&p_sys->fmt.i_codec, p_sys->fmt.audio.i_channels,
+ p_sys->fmt.audio.i_rate, p_sys->fmt.i_bitrate / 8192,
+ p_sys->fmt.audio.i_blockalign, p_sys->fmt.audio.i_bitspersample
+ );
+
+ p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
+
+ date_Init( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 );
+ date_Set( &p_sys->pts, 1 );
+
+ return VLC_SUCCESS;
+
+error:
+ msg_Err( p_demux, "Unsupported or malformatted file" );
+ 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( demux_t *p_demux )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ block_t *p_block;
+#if 0
+ int64_t i_offset;
+
+ i_offset = stream_Tell( p_demux->s );
+
+ if( p_sys->i_data_size > 0 &&
+ i_offset >= p_sys->i_data_offset + p_sys->i_data_size )
+ {
+ /* EOF */
+ return 0;
+ }
+#endif
+ p_block = stream_Block( p_demux->s, p_sys->fmt.audio.i_bytes_per_frame );
+ if( p_block == NULL )
+ {
+ msg_Warn( p_demux, "cannot read data" );
+ return 0;
+ }
+
+ p_block->i_dts = p_block->i_pts =
+ date_Increment( &p_sys->pts, p_sys->fmt.audio.i_frame_length );
+
+ es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
+
+ es_out_Send( p_demux->out, p_sys->p_es, p_block );
+
+ return 1;
+}
+
+/*****************************************************************************
+ * Close: frees unused data
+ *****************************************************************************/
+static void Close ( vlc_object_t * p_this )
+{
+ demux_sys_t *p_sys = ((demux_t *)p_this)->p_sys;
+
+ free( p_sys );
+}
+
+/*****************************************************************************
+ * Control:
+ *****************************************************************************/
+static int Control( demux_t *p_demux, int i_query, va_list args )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ if( i_query == DEMUX_SET_POSITION )
+ return VLC_EGENERIC; /* not implemented yet */
+
+ return demux2_vaControlHelper( p_demux->s, 0, -1, p_sys->fmt.i_bitrate,
+ p_sys->fmt.audio.i_blockalign,
+ i_query, args );
+}
projects / vlc / commitdiff