-/******************************************************************************
+/*****************************************************************************
* audio_output.h : audio output thread interface
- * (c)1999 VideoLAN
- ******************************************************************************
+ *****************************************************************************
+ * Copyright (C) 1999, 2000 VideoLAN
+ *
+ * Authors:
+ *
+ * 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 02111-1307, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
* Required headers:
- * - <sys/soundcard.h> ( audio_buf_info )
* - "common.h" ( boolean_t )
* - "mtime.h" ( mtime_t )
- * - "vlc_thread.h" ( vlc_thread_t )
- ******************************************************************************/
+ * - "threads.h" ( vlc_thread_t )
+ *****************************************************************************/
/* TODO :
*
/* Default output device. You probably should not change this. */
#define AOUT_DEFAULT_DEVICE "/dev/dsp"
-/* Default audio output format (AFMT_S16_NE = Native Endianess) */
-#define AOUT_DEFAULT_FORMAT AFMT_S16_NE
+/* Default audio output format (AOUT_FMT_S16_NE = Native Endianess) */
+#define AOUT_DEFAULT_FORMAT AOUT_FMT_S16_NE
+
+/* #define AOUT_DEFAULT_FORMAT AOUT_FMT_S8 */
+/* #define AOUT_DEFAULT_FORMAT AOUT_FMT_U8 */
+/* #define AOUT_DEFAULT_FORMAT AOUT_FMT_S16_BE */
+/* #define AOUT_DEFAULT_FORMAT AOUT_FMT_S16_LE */
+/* #define AOUT_DEFAULT_FORMAT AOUT_FMT_U16_BE */
+/* #define AOUT_DEFAULT_FORMAT AOUT_FMT_U16_LE */
+
/* Default stereo mode (0 stands for mono, 1 for stereo) */
#define AOUT_DEFAULT_STEREO 1
/* Audio output rate, in Hz */
-#define AOUT_MIN_RATE 22050 /* ?? */
+#define AOUT_MIN_RATE 22050 /* XXX?? */
#define AOUT_DEFAULT_RATE 44100
#define AOUT_MAX_RATE 48000
#define AOUT_FIFO_ISEMPTY( fifo ) ( (fifo).l_end_frame == (fifo).i_start_frame )
#define AOUT_FIFO_ISFULL( fifo ) ( ((((fifo).l_end_frame + 1) - (fifo).l_start_frame) & AOUT_FIFO_SIZE) == 0 )
-/******************************************************************************
- * aout_dsp_t
- ******************************************************************************/
-typedef struct
-{
- /* Path to the audio output device (default is set to "/dev/dsp") */
- char * psz_device;
- int i_fd;
-
- /* Format of the audio output samples (see <sys/soundcard.h>) */
- int i_format;
- /* Following boolean is set to 0 if output sound is mono, 1 if stereo */
- boolean_t b_stereo;
- /* Rate of the audio output sound (in Hz) */
- long l_rate;
-
- /* Buffer information structure, used by aout_dspGetBufInfo() to store the
- * current state of the internal sound card buffer */
- audio_buf_info buf_info;
-
-} aout_dsp_t;
-
-/******************************************************************************
+/*****************************************************************************
* aout_increment_t
- ******************************************************************************
+ *****************************************************************************
* This structure is used to keep the progression of an index up-to-date, in
* order to avoid rounding problems and heavy computations, as the function
* that handles this structure only uses additions.
- ******************************************************************************/
+ *****************************************************************************/
typedef struct
{
/* The remainder is used to keep track of the fractional part of the
} aout_increment_t;
-/******************************************************************************
+/*****************************************************************************
* aout_fifo_t
- ******************************************************************************/
+ *****************************************************************************/
typedef struct
{
/* See the fifo types below */
int i_type;
boolean_t b_die;
+ int i_channels;
boolean_t b_stereo;
long l_rate;
#define AOUT_ADEC_MONO_FIFO 3
#define AOUT_ADEC_STEREO_FIFO 4
-/******************************************************************************
- * aout_thread_t
- ******************************************************************************/
+/*****************************************************************************
+ * aout_thread_t : audio output thread descriptor
+ *****************************************************************************/
+typedef int (aout_sys_open_t) ( p_aout_thread_t p_aout );
+typedef int (aout_sys_reset_t) ( p_aout_thread_t p_aout );
+typedef int (aout_sys_setformat_t) ( p_aout_thread_t p_aout );
+typedef int (aout_sys_setchannels_t) ( p_aout_thread_t p_aout );
+typedef int (aout_sys_setrate_t) ( p_aout_thread_t p_aout );
+typedef long (aout_sys_getbufinfo_t) ( p_aout_thread_t p_aout,
+ long l_buffer_limit );
+typedef void (aout_sys_playsamples_t) ( p_aout_thread_t p_aout,
+ byte_t *buffer, int i_size );
+typedef void (aout_sys_close_t) ( p_aout_thread_t p_aout );
+
typedef struct aout_thread_s
{
vlc_thread_t thread_id;
boolean_t b_die;
- aout_dsp_t dsp;
-
vlc_mutex_t fifos_lock;
aout_fifo_t fifo[ AOUT_MAX_FIFOS ];
+ /* Plugins */
+ void * p_aout_plugin; /* video output plugin */
+ aout_sys_open_t * p_sys_open;
+ aout_sys_reset_t * p_sys_reset;
+ aout_sys_setformat_t * p_sys_setformat;
+ aout_sys_setchannels_t * p_sys_setchannels;
+ aout_sys_setrate_t * p_sys_setrate;
+ aout_sys_getbufinfo_t * p_sys_getbufinfo;
+ aout_sys_playsamples_t * p_sys_playsamples;
+ aout_sys_close_t * p_sys_close;
+
void * buffer;
/* The s32 buffer is used to mix all the audio fifos together before
* converting them and storing them in the audio output buffer */
/* The size of the audio output buffer is kept in audio units, as this is
* the only unit that is common with every audio decoder and audio fifo */
long l_units;
+ long l_msleep;
- mtime_t date;
/* date is the moment where the first audio unit of the output buffer
- * should be played and is kept up-to-date with the following incremental
- * structure */
- aout_increment_t date_increment;
+ * will be played */
+ mtime_t date;
+
+ /* Path to the audio output device (default is set to "/dev/dsp") */
+ char * psz_device;
+ int i_fd;
+
+ /* Format of the audio output samples */
+ int i_format;
+ /* Number of channels */
+ int i_channels;
+ /* Mono or Stereo sound */
+ boolean_t b_stereo;
+ /* Rate and gain of the audio output sound (in Hz) */
+ long l_rate;
+ long l_gain;
+
+ /* there might be some useful private structure, such as audio_buf_info
+ * for the OSS output */
+ p_aout_sys_t p_sys;
} aout_thread_t;
-/******************************************************************************
+/* Those are from <linux/soundcard.h> but are needed because of formats
+ * on other platforms */
+#define AOUT_FMT_U8 0x00000008
+#define AOUT_FMT_S16_LE 0x00000010 /* Little endian signed 16 */
+#define AOUT_FMT_S16_BE 0x00000020 /* Big endian signed 16 */
+#define AOUT_FMT_S8 0x00000040
+#define AOUT_FMT_U16_LE 0x00000080 /* Little endian U16 */
+#define AOUT_FMT_U16_BE 0x00000100 /* Big endian U16 */
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define AOUT_FMT_S16_NE AOUT_FMT_S16_LE
+#elif __BYTE_ORDER == __BIG_ENDIAN
+#define AOUT_FMT_S16_NE AOUT_FMT_S16_BE
+#endif
+
+/*****************************************************************************
* Prototypes
- ******************************************************************************/
+ *****************************************************************************/
aout_thread_t * aout_CreateThread ( int *pi_status );
void aout_DestroyThread ( aout_thread_t *p_aout, int *pi_status );
projects / vlc / blobdiff