-/*
- * Copyright (C) 2006 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.
- */
-
-/** \file osx_writer.c paraslash's output plugin for MacOs */
-
-/*
- * based on mosx-mpg123, by Guillaume Outters and Steven A. Kortze
- * <skortze@sourceforge.net>
- */
-
-#include <CoreAudio/CoreAudio.h>
-#include "para.h"
-#include "fd.h"
-#include "string.h"
-#include "list.h"
-#include "sched.h"
-#include "write.h"
-#include "osx_write.cmdline.h"
-#include "error.h"
-
-
-#include <CoreAudio/CoreAudio.h>
-#include <AudioUnit/AudioUnit.h>
-#include <AudioToolbox/DefaultAudioOutput.h>
-struct osx_buffer {
- float *buffer;
- long size;
- float *ptr; /* Where in the buffer are we? */
- long remaining;
- struct osx_buffer *next;
-};
-typedef struct osx_buffer osx_buffer;
-
-struct private_osx_writer_data {
- long size;
- short *ptr;
- AudioUnit output;
- char play;
- osx_buffer *from; /* Current buffers */
- osx_buffer *to;
- unsigned samplerate;
- unsigned channels;
-};
-
-
-/*
- * Tried with 3 buffers, but then any little window move is sufficient to
- * stop the sound (OK, on a G3 400 with a Public Beta. Perhaps now we can
- * go down to 2 buffers). With 16 buffers we have 1.5 seconds music
- * buffered (or, if you're pessimistic, 1.5 seconds latency). Note 0
- * buffers don't work much further than the Bus error.
- */
-#define NUMBER_BUFFERS 2
-
-static void destroy_buffers(struct private_osx_writer_data *powd)
-{
- osx_buffer *ptr;
- osx_buffer *ptr2;
- ptr = powd->to->next;
- powd->to->next = NULL;
- while (ptr) {
- ptr2 = ptr->next;
- free(ptr->buffer);
- free(ptr);
- ptr = ptr2;
- }
-}
-
-static void init_buffers(struct private_osx_writer_data *powd)
-{
- int i;
-
- osx_buffer ** ptrptr;
- ptrptr = &powd->to;
- for (i = 0; i < NUMBER_BUFFERS; i++) {
- *ptrptr = malloc(sizeof(osx_buffer));
- (*ptrptr)->size = 0;
- (*ptrptr)->remaining = 0;
- (*ptrptr)->buffer = NULL;
- ptrptr = &(*ptrptr)->next;
- /* This buffer is ready for filling (of course, it is empty!) */
- }
- *ptrptr = powd->from = powd->to;
-}
-
-static void fill_buffer(osx_buffer *b, short *source, long size)
-{
- float *dest;
-
- if (b->remaining) /* Non empty buffer, must still be playing */
- return;
- PARA_INFO_LOG("%ld\n", size);
- if (b->size != size) {
- /*
- * Hey! What's that? Coudn't this buffer size be fixed
- * once (well, perhaps we just didn't allocate it yet)
- */
- if (b->buffer)
- free(b->buffer);
- b->buffer = malloc(size * sizeof(float));
- 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; */
- *dest++ = (*source++) / 32768.0;
- }
- b->ptr = b->buffer;
- b->remaining = b->size;
-}
-
-static OSStatus osx_callback(void * inClientData,
- __a_unused AudioUnitRenderActionFlags *inActionFlags,
- __a_unused const AudioTimeStamp *inTimeStamp,
- __a_unused UInt32 inBusNumber,
- __a_unused UInt32 inNumFrames,
- AudioBufferList *outOutputData)
-{
- long m, n;
- float *dest;
- int i;
- struct private_osx_writer_data *powd = inClientData;
-
-// PARA_INFO_LOG("%p\n", powd);
- for (i = 0; i < outOutputData->mNumberBuffers; ++i) {
- /* what we have to fill */
- m = outOutputData->mBuffers[i].mDataByteSize / sizeof(float);
- dest = outOutputData->mBuffers[i].mData;
- 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);
- }
- PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
- /*
- * we dump what we can. In fact, just the necessary
- * should be sufficient
- */
- if (n > m)
- n = m;
- memcpy(dest, powd->from->ptr, n * sizeof(float));
- dest += n;
- /* remember all done work */
- m -= n;
- powd->from->ptr += n;
- if ((powd->from->remaining -= n) <= 0)
- powd->from = powd->from->next;
- }
- }
- return 0;
-}
-
-static int osx_writer_open(struct writer_node *wn)
-{
- struct private_osx_writer_data *powd = para_calloc(
- sizeof(struct private_osx_writer_data));
- ComponentDescription desc;
- Component comp;
- AURenderCallbackStruct inputCallback = {osx_callback, powd};
- AudioStreamBasicDescription format;
- int ret;
- struct writer_node_group *wng = wn->wng;
- struct osx_write_args_info *conf = wn->conf;
-
- wn->private_data = powd;
- /* where did that default audio output go? */
- desc.componentType = kAudioUnitType_Output;
- desc.componentSubType = kAudioUnitSubType_DefaultOutput;
- /* NOTE: and if default output isn't Apple? */
- desc.componentManufacturer = kAudioUnitManufacturer_Apple;
- desc.componentFlags = 0;
- desc.componentFlagsMask = 0;
- ret = -E_DEFAULT_COMP;
- comp = FindNextComponent(NULL, &desc);
- if (!comp)
- goto e0;
- ret = -E_OPEN_COMP;
- if (OpenAComponent(comp, &powd->output))
- goto e0;
- ret = -E_UNIT_INIT;
- if (AudioUnitInitialize(powd->output))
- goto e1;
- powd->size = 0;
- powd->ptr = NULL;
- powd->play = 0;
- /* Hmmm, let's choose PCM format */
- /* We tell the Output Unit what format we're going to supply data to it.
- * This is necessary if you're providing data through an input callback
- * AND you want the DefaultOutputUnit to do any format conversions
- * necessary from your format to the device's format.
- */
- if (!conf->samplerate_given && wng->samplerate)
- powd->samplerate = *wng->samplerate;
- else
- powd->samplerate = conf->samplerate_arg;
- format.mSampleRate = powd->samplerate;
- /* The specific encoding type of audio stream*/
- format.mFormatID = kAudioFormatLinearPCM;
- /* flags specific to each format */
- format.mFormatFlags = kLinearPCMFormatFlagIsFloat
- | kLinearPCMFormatFlagIsPacked
- | kLinearPCMFormatFlagIsBigEndian;
- if (!conf->channels_given && wng->channels)
- powd->channels = *wng->channels;
- else
- powd->channels = conf->channels_arg;
- format.mChannelsPerFrame = powd->channels;
- format.mFramesPerPacket = 1;
- format.mBytesPerPacket = format.mChannelsPerFrame * sizeof(float);
- format.mBytesPerFrame = format.mFramesPerPacket * format.mBytesPerPacket;
- /* 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,
- kAudioUnitScope_Input, 0, &format,
- sizeof(AudioStreamBasicDescription)))
- goto e2;
- init_buffers(powd);
- ret = -E_ADD_CALLBACK;
- if (AudioUnitSetProperty(powd->output, kAudioUnitProperty_SetRenderCallback,
- kAudioUnitScope_Input, 0, &inputCallback,
- sizeof(inputCallback)) < 0)
- goto e3;
- return 1;
-e3:
- destroy_buffers(powd);
-e2:
- AudioUnitUninitialize(powd->output);
-e1:
- CloseComponent(powd->output);
-e0:
- return ret;
-}
-
-__malloc void *osx_write_parse_config(char *options)
-{
- struct osx_write_args_info *conf
- = para_calloc(sizeof(struct osx_write_args_info));
- PARA_INFO_LOG("options: %s\n", options);
- int ret = osx_cmdline_parser_string(options, conf, "osx_write");
- if (ret)
- goto err_out;
- return conf;
-err_out:
- free(conf);
- return NULL;
-
-}
-
-static void osx_writer_close(struct writer_node *wn)
-{
- struct private_osx_writer_data *powd = wn->private_data;
-
- PARA_INFO_LOG("closing writer node %p\n", wn);
- AudioOutputUnitStop(powd->output);
- AudioUnitUninitialize(powd->output);
- CloseComponent(powd->output);
- destroy_buffers(powd);
- free(powd);
-}
-
-static int need_new_buffer(struct writer_node *wn)
-{
- struct writer_node_group *wng = wn->wng;
- struct private_osx_writer_data *powd = wn->private_data;
-
- if (*wng->loaded < sizeof(short))
- return 0;
- if (powd->to->remaining) /* Non empty buffer, must still be playing */
- return 0;
- return 1;
-}
-
-static int osx_write_post_select(__a_unused struct sched *s,
- struct writer_node *wn)
-{
- struct private_osx_writer_data *powd = wn->private_data;
- struct writer_node_group *wng = wn->wng;
- short *data = (short*)wng->buf;
-
- if (!need_new_buffer(wn))
- return 1;
- fill_buffer(powd->to, data, *wng->loaded / sizeof(short));
- powd->to = powd->to->next;
- wn->written = *wng->loaded;
- if (!powd->play) {
- if (AudioOutputUnitStart(powd->output))
- return -E_UNIT_START;
- powd->play = 1;
- }
- return 1;
-}
-
-static int osx_write_pre_select(struct sched *s, __a_unused struct writer_node *wn)
-{
- s->timeout.tv_sec = 0;
- s->timeout.tv_usec = 20;
- return 1;
-}
-
-void osx_writer_init(struct writer *w)
-{
- w->open = osx_writer_open;
- w->close = osx_writer_close;
- w->pre_select = osx_write_pre_select;
- w->post_select = osx_write_post_select;
- w->parse_config = osx_write_parse_config;
- w->shutdown = NULL; /* nothing to do */
-}
projects / paraslash.git / commitdiff