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Diffstat (limited to 'engines/sci/sfx/pcm_device/audiobuf.h')
| -rw-r--r-- | engines/sci/sfx/pcm_device/audiobuf.h | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/engines/sci/sfx/pcm_device/audiobuf.h b/engines/sci/sfx/pcm_device/audiobuf.h deleted file mode 100644 index b2019aec17..0000000000 --- a/engines/sci/sfx/pcm_device/audiobuf.h +++ /dev/null @@ -1,140 +0,0 @@ -/*************************************************************************** - audiobuf.h Copyright (C) 2003 Christoph Reichenbach - - - This program may be modified and copied freely according to the terms of - the GNU general public license (GPL), as long as the above copyright - notice and the licensing information contained herein are preserved. - - Please refer to www.gnu.org for licensing details. - - This work is provided AS IS, without warranty of any kind, expressed or - implied, including but not limited to the warranties of merchantibility, - noninfringement, and fitness for a specific purpose. The author will not - be held liable for any damage caused by this work or derivatives of it. - - By using this source code, you agree to the licensing terms as stated - above. - - - Please contact the maintainer for bug reports or inquiries. - - Current Maintainer: - - Christoph Reichenbach (CR) <jameson@linuxgames.com> - -***************************************************************************/ - -/* Auxiliary audio buffer for PCM devices -** Polled PCM devices must store data written to them until it is explicitly -** requiested. This is facilitated by the structures and functions defined -** here. -** This is generic for all PCM devices; it implies no specific requirements. -** -** Usage: Introduce an sfx_audio_buf_t into your state and make sure to use -** each of the functions provided here at least once in the appropriate -** places. -*/ - - -#ifndef _AUDIOBUF_H_ -#define _AUDIOBUF_H_ - -#include <resource.h> -#include <sfx_time.h> -#include <sci_memory.h> -#include <sfx_pcm.h> - - -#define SFX_AUDIO_BUF_SIZE 8192 /* Must be multiple of framesize */ -#define SFX_AUDIO_MAX_FRAME 8 /* Max. individual frame size */ - -typedef struct _sfx_audio_buf_chunk { - unsigned char data[SFX_AUDIO_BUF_SIZE]; - int used; - struct _sfx_audio_buf_chunk *prev; - struct _sfx_audio_buf_chunk *next; -} sfx_audio_buf_chunk_t; - -typedef struct { - int read_offset; - sfx_audio_buf_chunk_t *first; /* Next to read-- can be = last */ - sfx_audio_buf_chunk_t *last; /* Next to write-- can be = first */ - sfx_audio_buf_chunk_t *unused; /* Unused chunk list, can be NULL */ - unsigned char last_frame[SFX_AUDIO_MAX_FRAME]; - /* Contains the last frame successfully read; used for buffer - ** underruns to avoid crack before silance */ - sfx_timestamp_t read_timestamp; /* Timestamp for reading */ - int frames_nr; /* Total number of frames currently in between reading and writing */ - int framesize; -} sfx_audio_buf_t; - - -void -sfx_audbuf_init(sfx_audio_buf_t *buf, sfx_pcm_config_t conf); -/* Initialises an audio buffer -** Parameters: (sfx_audio_buf_t *) buf: The buffer to initialise -** (sfx_pcm_config_t) conf: The configuration for which the buffer should -** be set up -** Modifies : (sfx_audio_buf_t) *buf -*/ - -void -sfx_audbuf_free(sfx_audio_buf_t *buf); -/* Frees all memory associated with an audio buffer -** Parameters: (sfx_audio_buf_t *) buf: The buffer whose associated memory -** should be freed -** Modifies : (sfx_audio_buf_t) *buf -*/ - -void -sfx_audbuf_write(sfx_audio_buf_t *buf, unsigned char *src, int frames); -/* Store data in an audion buffer -** Parameters: (sfx_audio_buf_t *) buf: The buffer to write to -** (unsigned char *) src: Pointer to the data that should be -** written -** (int) frames: Number of frames to write -** Modifies : (sfx_audio_buf_t) *buf -*/ - - -void -sfx_audbuf_write_timestamp(sfx_audio_buf_t *buf, sfx_timestamp_t ts); -/* Sets the most recently written timestamp for the buffer -** Parameters: (sfx_audio_buf_t *) buf: The buffer to operate on -** (sfx_timestamp_t) ts: The timestamp to set -** If a timestamp is already set, 'ts' is checked for consistency and -** 'silent' frames are introduced as padding for future writes. -*/ - - -int -sfx_audbuf_read_timestamp(sfx_audio_buf_t *buf, sfx_timestamp_t *ts); -/* Reads the timestamp describing the time right before the next frame being read -** Parameters: (sfx_audio_buf_t *) buf: The buffer to read from -** Returns : (sfx_timestamp_t) *ts: The requested timestamp, or nothing -** (int) zero on success, nonzero if no timestamp is known -*/ - - -int -sfx_audbuf_read(sfx_audio_buf_t *buf, unsigned char *dest, int frames); -/* Read data from audio buffer -** Parameters: (sfx_audio_buf_t *) buf: The buffer to write to -** (unsigned char *) dest: Pointer to the place the read data -** should be written to -** (int) frames: Number of frames to write -** Returns : (int) Number of frames actually read -** Affects : (sfx_audio_buf_t) *buf -** (unsigned char ) *dest -** global error stream -** If the returned number of frames is smaller than the number of frames -** requested to be written, this function will issue a buffer underrun -** warning and fill up the remaining space with the last frame it en-- -** countered, or a block of '0' if no such frame is known. -*/ - - - - -#endif /* !_AUDIOBUF_H_ */ |