diff options
Diffstat (limited to 'libao/src/src/ao_au.c')
| -rw-r--r-- | libao/src/src/ao_au.c | 250 |
1 files changed, 0 insertions, 250 deletions
diff --git a/libao/src/src/ao_au.c b/libao/src/src/ao_au.c deleted file mode 100644 index f6aad2d..0000000 --- a/libao/src/src/ao_au.c +++ /dev/null @@ -1,250 +0,0 @@ -/* - * - * ao_au.c - * - * Copyright (C) Wil Mahan - May 2001 - * - * This file is part of libao, a cross-platform audio output library. See - * README for a history of this source code. - * - * libao 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, or (at your option) - * any later version. - * - * libao 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 GNU Make; see the file COPYING. If not, write to - * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. - * - ******************************************************************** - - last mod: $Id: ao_au.c 17718 2010-12-06 20:09:29Z xiphmont $ - - ********************************************************************/ - -#include <stdio.h> -#include <string.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <errno.h> -#ifndef _MSC_VER -# include <unistd.h> -#endif -#include <ao/ao.h> -#include <ao/plugin.h> - -#define AUDIO_FILE_MAGIC ((uint_32)0x2e736e64) /* ".snd" */ - -#define AUDIO_UNKNOWN_SIZE (~0) /* (unsigned) -1 */ - -/* Format codes (not comprehensive) */ -#define AUDIO_FILE_ENCODING_LINEAR_8 (2) /* 8-bit linear PCM */ -#define AUDIO_FILE_ENCODING_LINEAR_16 (3) /* 16-bit linear PCM */ - -#define AU_HEADER_LEN (28) - -#define DEFAULT_SWAP_BUFFER_SIZE 2048 - -/* Write a uint_32 in big-endian order. */ -#define WRITE_U32(buf, x) \ - *(buf) = (unsigned char)(((x)>>24)&0xff);\ - *((buf)+1) = (unsigned char)(((x)>>16)&0xff);\ - *((buf)+2) = (unsigned char)(((x)>>8)&0xff);\ - *((buf)+3) = (unsigned char)((x)&0xff); - -typedef struct Audio_filehdr { - uint_32 magic; /* magic number */ - uint_32 hdr_size; /* offset of the data */ - uint_32 data_size; /* length of data (optional) */ - uint_32 encoding; /* data format code */ - uint_32 sample_rate; /* samples per second */ - uint_32 channels; /* number of interleaved channels */ - char info[4]; /* optional text information */ -} Audio_filehdr; - -static char *ao_au_options[] = {"matrix","verbose","quiet","debug"}; -static ao_info ao_au_info = -{ - AO_TYPE_FILE, - "AU file output", - "au", - "Wil Mahan <wtm2@duke.edu>", - "Sends output to a .au file", - AO_FMT_BIG, - 0, - ao_au_options, - sizeof(ao_au_options)/sizeof(*ao_au_options) -}; - -typedef struct ao_au_internal -{ - Audio_filehdr au; -} ao_au_internal; - - -static int ao_au_test(void) -{ - return 1; /* File driver always works */ -} - - -static ao_info *ao_au_driver_info(void) -{ - return &ao_au_info; -} - - -static int ao_au_device_init(ao_device *device) -{ - ao_au_internal *internal; - - internal = (ao_au_internal *) malloc(sizeof(ao_au_internal)); - - if (internal == NULL) - return 0; /* Could not initialize device memory */ - - memset(&(internal->au), 0, sizeof(internal->au)); - - device->internal = internal; - device->output_matrix_order = AO_OUTPUT_MATRIX_FIXED; - - return 1; /* Memory alloc successful */ -} - - -static int ao_au_set_option(ao_device *device, const char *key, - const char *value) -{ - return 1; /* No options! */ -} - - -static int ao_au_open(ao_device *device, ao_sample_format *format) -{ - ao_au_internal *internal = (ao_au_internal *) device->internal; - unsigned char buf[AU_HEADER_LEN]; - - /* The AU format is big-endian */ - device->driver_byte_format = AO_FMT_BIG; - - /* Fill out the header */ - internal->au.magic = AUDIO_FILE_MAGIC; - internal->au.channels = device->output_channels; - if (format->bits == 8) - internal->au.encoding = AUDIO_FILE_ENCODING_LINEAR_8; - else if (format->bits == 16) - internal->au.encoding = AUDIO_FILE_ENCODING_LINEAR_16; - else { - /* Only 8 and 16 bits are supported at present. */ - return 0; - } - internal->au.sample_rate = format->rate; - internal->au.hdr_size = AU_HEADER_LEN; - - /* From the AU specification: "When audio files are passed - * through pipes, the 'data_size' field may not be known in - * advance. In such cases, the 'data_size' should be set - * to AUDIO_UNKNOWN_SIZE." - */ - internal->au.data_size = AUDIO_UNKNOWN_SIZE; - /* strncpy(state->au.info, "OGG ", 4); */ - - /* Write the header in big-endian order */ - WRITE_U32(buf, internal->au.magic); - WRITE_U32(buf + 4, internal->au.hdr_size); - WRITE_U32(buf + 8, internal->au.data_size); - WRITE_U32(buf + 12, internal->au.encoding); - WRITE_U32(buf + 16, internal->au.sample_rate); - WRITE_U32(buf + 20, internal->au.channels); - strncpy (buf + 24, internal->au.info, 4); - - if (fwrite(buf, sizeof(char), AU_HEADER_LEN, device->file) - != AU_HEADER_LEN) { - return 0; /* Error writing header */ - } - - if(!device->inter_matrix){ - /* set up matrix such that users are warned about > stereo playback */ - if(device->output_channels<=2) - device->inter_matrix=strdup("L,R"); - //else no matrix, which results in a warning - } - - - return 1; -} - - -/* - * play the sample to the already opened file descriptor - */ -static int ao_au_play(ao_device *device, const char *output_samples, - uint_32 num_bytes) -{ - if (fwrite(output_samples, sizeof(char), num_bytes, - device->file) < num_bytes) - return 0; - else - return 1; -} - -static int ao_au_close(ao_device *device) -{ - ao_au_internal *internal = (ao_au_internal *) device->internal; - - off_t size; - unsigned char buf[4]; - - /* Try to find the total file length, including header */ - size = ftell(device->file); - - /* It's not a problem if the lseek() fails; the AU - * format does not require a file length. This is - * useful for writing to non-seekable files (e.g. - * pipes). - */ - if (size > 0) { - internal->au.data_size = size - AU_HEADER_LEN; - - /* Rewind the file */ - if (fseek(device->file, 8 /* offset of data_size */, - SEEK_SET) < 0) - { - return 1; /* Seek failed; that's okay */ - } - - /* Fill in the file length */ - WRITE_U32 (buf, internal->au.data_size); - if (fwrite(buf, sizeof(char), 4, device->file) < 4) { - return 1; /* Header write failed; that's okay */ - } - } - - return 1; -} - - -static void ao_au_device_clear(ao_device *device) -{ - ao_au_internal *internal = (ao_au_internal *) device->internal; - - free(internal); - device->internal=NULL; -} - -ao_functions ao_au = { - ao_au_test, - ao_au_driver_info, - ao_au_device_init, - ao_au_set_option, - ao_au_open, - ao_au_play, - ao_au_close, - ao_au_device_clear -}; |