--- /dev/null
+/*****************************************************************************
+ * scope.c : Scope effect module
+ *****************************************************************************
+ * Copyright (C) 2002 VideoLAN
+ * $Id: scope.c,v 1.1 2002/02/25 04:30:03 sam Exp $
+ *
+ * Authors: Samuel Hocevar <sam@zoy.org>
+ *
+ * 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 <errno.h>
+
+#include <videolan/vlc.h>
+
+#include "video.h"
+#include "video_output.h"
+
+#include "audio_output.h" /* aout_thread_t */
+
+#define SCOPE_WIDTH 640
+#define SCOPE_HEIGHT 200
+#define SCOPE_ASPECT (VOUT_ASPECT_FACTOR*SCOPE_WIDTH/SCOPE_HEIGHT)
+
+/*****************************************************************************
+ * Capabilities defined in the other files.
+ *****************************************************************************/
+static void aout_getfunctions( function_list_t * p_function_list );
+
+/*****************************************************************************
+ * aout_sys_t: scope audio output method descriptor
+ *****************************************************************************
+ * This structure is part of the audio output thread descriptor.
+ * It describes some scope specific variables.
+ *****************************************************************************/
+typedef struct aout_sys_s
+{
+ struct aout_fifo_s *p_aout_fifo; /* XXX: unused yet */
+ struct vout_thread_s *p_vout;
+
+} aout_sys_t;
+
+/*****************************************************************************
+ * Build configuration tree.
+ *****************************************************************************/
+MODULE_CONFIG_START
+MODULE_CONFIG_STOP
+
+MODULE_INIT_START
+ SET_DESCRIPTION( "scope effect module" )
+ ADD_CAPABILITY( AOUT, 0 )
+ ADD_SHORTCUT( "scope" )
+MODULE_INIT_STOP
+
+MODULE_ACTIVATE_START
+ aout_getfunctions( &p_module->p_functions->aout );
+MODULE_ACTIVATE_STOP
+
+MODULE_DEACTIVATE_START
+MODULE_DEACTIVATE_STOP
+
+/*****************************************************************************
+ * Local prototypes.
+ *****************************************************************************/
+static int aout_Open ( aout_thread_t *p_aout );
+static int aout_SetFormat ( aout_thread_t *p_aout );
+static int aout_GetBufInfo ( aout_thread_t *p_aout, int i_buffer_info );
+static void aout_Play ( aout_thread_t *p_aout,
+ byte_t *buffer, int i_size );
+static void aout_Close ( aout_thread_t *p_aout );
+
+/*****************************************************************************
+ * Functions exported as capabilities. They are declared as static so that
+ * we don't pollute the namespace too much.
+ *****************************************************************************/
+static void aout_getfunctions( function_list_t * p_function_list )
+{
+ p_function_list->functions.aout.pf_open = aout_Open;
+ p_function_list->functions.aout.pf_setformat = aout_SetFormat;
+ p_function_list->functions.aout.pf_getbufinfo = aout_GetBufInfo;
+ p_function_list->functions.aout.pf_play = aout_Play;
+ p_function_list->functions.aout.pf_close = aout_Close;
+}
+
+/*****************************************************************************
+ * aout_Open: open a scope effect plugin
+ *****************************************************************************/
+static int aout_Open( aout_thread_t *p_aout )
+{
+ /* Allocate structure */
+ p_aout->p_sys = malloc( sizeof( aout_sys_t ) );
+ if( p_aout->p_sys == NULL )
+ {
+ intf_ErrMsg("error: %s", strerror(ENOMEM) );
+ return( 1 );
+ }
+
+ p_aout->p_sys->p_vout =
+ vout_CreateThread( NULL, SCOPE_WIDTH, SCOPE_HEIGHT,
+ FOURCC_I420, SCOPE_ASPECT );
+
+ return( 0 );
+}
+
+/*****************************************************************************
+ * aout_SetFormat: set the output format
+ *****************************************************************************/
+static int aout_SetFormat( aout_thread_t *p_aout )
+{
+ /* Force the output method */
+ p_aout->i_format = AOUT_FMT_U16_LE;
+ p_aout->i_channels = 2;
+
+ return( 0 );
+}
+
+/*****************************************************************************
+ * aout_GetBufInfo: buffer status query
+ *****************************************************************************/
+static int aout_GetBufInfo( aout_thread_t *p_aout, int i_buffer_limit )
+{
+ /* arbitrary value that should be changed */
+ return( i_buffer_limit );
+}
+
+/*****************************************************************************
+ * aout_Play: play a sound samples buffer
+ *****************************************************************************
+ * This function writes a buffer of i_length bytes in the socket
+ *****************************************************************************/
+static void aout_Play( aout_thread_t *p_aout, byte_t *p_buffer, int i_size )
+{
+ picture_t *p_outpic;
+ int i_index;
+ u8 *p_pixel;
+ u16 *p_sample;
+
+ /* This is a new frame. Get a structure from the video_output. */
+ while( ( p_outpic = vout_CreatePicture( p_aout->p_sys->p_vout, 0, 0, 0 ) )
+ == NULL )
+ {
+ if( p_aout->b_die )
+ {
+ return;
+ }
+ msleep( VOUT_OUTMEM_SLEEP );
+ }
+
+ /* Blank the picture */
+ for( i_index = 0 ; i_index < p_outpic->i_planes ; i_index++ )
+ {
+ memset( p_outpic->p[i_index].p_pixels, i_index ? 0x80 : 0x00,
+ p_outpic->p[i_index].i_lines * p_outpic->p[i_index].i_pitch );
+ }
+
+ /* Left channel */
+ for( i_index = 0, p_sample = (u16*)p_buffer;
+ i_index < SCOPE_WIDTH && i_index < i_size / 2;
+ i_index++ )
+ {
+ int i;
+ u8 i_value = *p_sample / 256;
+
+ for( i = 0 ; i < 8 ; i++ )
+ {
+ p_pixel = p_outpic->p[0].p_pixels + (p_outpic->p[0].i_pitch * i_index) / SCOPE_WIDTH + p_outpic->p[0].i_lines * (u8)(i_value+128) / 512 * p_outpic->p[0].i_pitch;
+ *p_pixel = 0x9f;
+ p_pixel = p_outpic->p[1].p_pixels + (p_outpic->p[1].i_pitch * i_index) / SCOPE_WIDTH + p_outpic->p[1].i_lines * (u8)(i_value+128) / 512 * p_outpic->p[1].i_pitch;
+ *p_pixel = 0x00;
+ p_sample += 2;
+ }
+ }
+
+ /* Right channel */
+ for( i_index = 0, p_sample = (u16*)p_buffer + 1;
+ i_index < SCOPE_WIDTH && i_index < i_size / 2;
+ i_index++ )
+ {
+ int i;
+ u8 i_value = *p_sample / 256;
+
+ for( i = 0 ; i < 8 ; i++ )
+ {
+ p_pixel = p_outpic->p[0].p_pixels + (p_outpic->p[0].i_pitch * i_index) / SCOPE_WIDTH + (p_outpic->p[0].i_lines * (u8)(i_value+128) / 512 + p_outpic->p[0].i_lines / 2) * p_outpic->p[0].i_pitch;
+ *p_pixel = 0x7f;
+ p_pixel = p_outpic->p[2].p_pixels + (p_outpic->p[2].i_pitch * i_index) / SCOPE_WIDTH + (p_outpic->p[2].i_lines * (u8)(i_value+128) / 512 + p_outpic->p[2].i_lines / 2) * p_outpic->p[2].i_pitch;
+ *p_pixel = 0xdd;
+ p_sample += 2;
+ }
+ }
+
+ /* Display the picture */
+ vout_DatePicture( p_aout->p_sys->p_vout, p_outpic, p_aout->date );
+ vout_DisplayPicture( p_aout->p_sys->p_vout, p_outpic );
+}
+
+/*****************************************************************************
+ * aout_Close: close the Esound socket
+ *****************************************************************************/
+static void aout_Close( aout_thread_t *p_aout )
+{
+ vout_DestroyThread( p_aout->p_sys->p_vout, NULL );
+ free( p_aout->p_sys );
+}
+
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