+/*****************************************************************************
+ * OpenFilter:
+ *****************************************************************************/
+static int OpenFilter( vlc_object_t *p_this )
+{
+ filter_t *p_filter = (filter_t *)p_this;
+ filter_sys_t *p_sys;
+
+ if( p_filter->fmt_in.i_codec != VLC_FOURCC('m','p','g','a') &&
+ p_filter->fmt_in.i_codec != VLC_FOURCC('m','p','g','3') )
+ {
+ return VLC_EGENERIC;
+ }
+
+ /* Allocate the memory needed to store the module's structure */
+ p_sys = p_filter->p_sys = malloc( sizeof(filter_sys_t) );
+ if( p_sys == NULL )
+ {
+ msg_Err( p_filter, "out of memory" );
+ return -1;
+ }
+ p_sys->i_reject_count = 0;
+
+ p_filter->pf_audio_filter = Convert;
+
+ /* Initialize libmad */
+ mad_stream_init( &p_sys->mad_stream );
+ mad_frame_init( &p_sys->mad_frame );
+ mad_synth_init( &p_sys->mad_synth );
+ mad_stream_options( &p_sys->mad_stream, MAD_OPTION_IGNORECRC );
+
+ if( vlc_CPU() & CPU_CAPABILITY_FPU )
+ p_filter->fmt_out.i_codec = VLC_FOURCC('f','l','3','2');
+ else
+ p_filter->fmt_out.i_codec = VLC_FOURCC('f','i','3','2');
+ p_filter->fmt_out.audio.i_format = p_filter->fmt_out.i_codec;
+
+ p_filter->fmt_out.audio.i_rate = p_filter->fmt_in.audio.i_rate;
+
+ msg_Dbg( p_this, "%4.4s->%4.4s, bits per sample: %i",
+ (char *)&p_filter->fmt_in.i_codec,
+ (char *)&p_filter->fmt_out.i_codec,
+ p_filter->fmt_in.audio.i_bitspersample );
+
+ return 0;
+}
+
+/*****************************************************************************
+ * CloseFilter : deallocate data structures
+ *****************************************************************************/
+static void CloseFilter( vlc_object_t *p_this )
+{
+ filter_t *p_filter = (filter_t *)p_this;
+ filter_sys_t *p_sys = p_filter->p_sys;
+
+ mad_synth_finish( &p_sys->mad_synth );
+ mad_frame_finish( &p_sys->mad_frame );
+ mad_stream_finish( &p_sys->mad_stream );
+ free( p_sys );
+}
+
+static block_t *Convert( filter_t *p_filter, block_t *p_block )
+{
+ aout_filter_t aout_filter;
+ aout_buffer_t in_buf, out_buf;
+ block_t *p_out;
+ int i_out_size;
+
+ if( !p_block || !p_block->i_samples )
+ {
+ if( p_block ) p_block->pf_release( p_block );
+ return NULL;
+ }
+
+ i_out_size = p_block->i_samples *
+ p_filter->fmt_out.audio.i_bitspersample *
+ p_filter->fmt_out.audio.i_channels / 8;
+
+ p_out = p_filter->pf_audio_buffer_new( p_filter, i_out_size );
+ if( !p_out )
+ {
+ msg_Warn( p_filter, "can't get output buffer" );
+ p_block->pf_release( p_block );
+ return NULL;
+ }
+
+ p_out->i_samples = p_block->i_samples;
+ p_out->i_dts = p_block->i_dts;
+ p_out->i_pts = p_block->i_pts;
+ p_out->i_length = p_block->i_length;
+
+ aout_filter.p_sys = (struct aout_filter_sys_t *)p_filter->p_sys;
+ aout_filter.input = p_filter->fmt_in.audio;
+ aout_filter.input.i_format = p_filter->fmt_in.i_codec;
+ aout_filter.output = p_filter->fmt_out.audio;
+ aout_filter.output.i_format = p_filter->fmt_out.i_codec;
+
+ in_buf.p_buffer = p_block->p_buffer;
+ in_buf.b_discontinuity = VLC_FALSE;
+ in_buf.i_nb_bytes = p_block->i_buffer;
+ in_buf.i_nb_samples = p_block->i_samples;
+ out_buf.p_buffer = p_out->p_buffer;
+ out_buf.i_nb_bytes = p_out->i_buffer;
+ out_buf.i_nb_samples = p_out->i_samples;
+
+ DoWork( (aout_instance_t *)p_filter, &aout_filter, &in_buf, &out_buf );
+
+ p_block->pf_release( p_block );
+
+ p_out->i_buffer = out_buf.i_nb_bytes;
+ p_out->i_samples = out_buf.i_nb_samples;
+
+ return p_out;
+}