/*
- * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.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.
+ * Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file osx_write.c paraslash's output plugin for MacOs */
float *buffer;
/** the size of this buffer */
long size;
- /* current position in the buffer */
+ /** current position in the buffer */
float *ptr;
/** number of floats not yet consuned */
long remaining;
struct osx_buffer *next;
};
+/** data specific to the osx writer */
struct private_osx_write_data {
- AudioUnit output;
+ /** the main control structure for audio data manipulation */
+ AudioUnit audio_unit;
+ /** non-zero if playback has started */
char play;
- struct osx_buffer *from; /* Current buffers */
+ /** callback reads audio data from this buffer */
+ struct osx_buffer *from;
+ /** the post_select writes audio data here */
struct osx_buffer *to;
+ /** sample rate of the current audio stream */
unsigned samplerate;
+ /** number of channels of the current audio stream */
unsigned channels;
};
b->size = size;
}
dest = b->buffer;
- while (size--) {
- char *tmp = (char *)source;
- char c = *tmp;
- *tmp = *(tmp + 1);
- *(tmp + 1) = c;
- /* *dest++ = ((*source++) + 32768) / 65536.0; */
+ while (size--)
*dest++ = (*source++) / 32768.0;
- }
b->ptr = b->buffer;
b->remaining = b->size;
}
while (m > 0) {
if ((n = powd->from->remaining) <= 0) {
PARA_INFO_LOG("%s", "buffer underrun\n");
- /* no more bytes in the current read buffer! */
- while ((n = powd->from->remaining) <= 0)
- /* wait for the results */
- usleep(2000);
+ return 0;
}
// PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
/*
if (!comp)
goto e0;
ret = -E_OPEN_COMP;
- if (OpenAComponent(comp, &powd->output))
+ if (OpenAComponent(comp, &powd->audio_unit))
goto e0;
ret = -E_UNIT_INIT;
- if (AudioUnitInitialize(powd->output))
+ if (AudioUnitInitialize(powd->audio_unit))
goto e1;
powd->play = 0;
/* Hmmm, let's choose PCM format */
/* one of the most constant constants of the whole computer history */
format.mBitsPerChannel = sizeof(float) * 8;
ret = -E_STREAM_FORMAT;
- if (AudioUnitSetProperty(powd->output, kAudioUnitProperty_StreamFormat,
+ if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input, 0, &format,
sizeof(AudioStreamBasicDescription)))
goto e2;
init_buffers(wn);
ret = -E_ADD_CALLBACK;
- if (AudioUnitSetProperty(powd->output, kAudioUnitProperty_SetRenderCallback,
+ if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_SetRenderCallback,
kAudioUnitScope_Input, 0, &inputCallback,
sizeof(inputCallback)) < 0)
goto e3;
e3:
destroy_buffers(powd);
e2:
- AudioUnitUninitialize(powd->output);
+ AudioUnitUninitialize(powd->audio_unit);
e1:
- CloseComponent(powd->output);
+ CloseComponent(powd->audio_unit);
e0:
return ret;
}
-__malloc void *osx_write_parse_config(char *options)
+__malloc static void *osx_write_parse_config(const char *options)
{
struct osx_write_args_info *conf
= para_calloc(sizeof(struct osx_write_args_info));
struct private_osx_write_data *powd = wn->private_data;
PARA_INFO_LOG("closing writer node %p\n", wn);
- AudioOutputUnitStop(powd->output);
- AudioUnitUninitialize(powd->output);
- CloseComponent(powd->output);
+ AudioOutputUnitStop(powd->audio_unit);
+ AudioUnitUninitialize(powd->audio_unit);
+ CloseComponent(powd->audio_unit);
destroy_buffers(powd);
free(powd);
}
powd->to = powd->to->next;
wn->written = *wng->loaded;
if (!powd->play) {
- if (AudioOutputUnitStart(powd->output))
+ if (AudioOutputUnitStart(powd->audio_unit))
return -E_UNIT_START;
powd->play = 1;
}
return 1;
}
+/** the init function of the osx writer */
void osx_write_init(struct writer *w)
{
w->open = osx_write_open;