/*
- * Copyright (C) 2006-2010 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
#include <regex.h>
#include <sys/types.h>
-#include <dirent.h>
-#include <stdbool.h>
#include "para.h"
#include "fd.h"
#include "write.h"
#include "write_common.h"
#include "osx_write.cmdline.h"
+#include "ipc.h"
#include "error.h"
#include <CoreServices/CoreServices.h>
#include <AudioUnit/AudioUnit.h>
#include <AudioToolbox/AudioToolbox.h>
-/** describes one input buffer for the osx writer */
-struct osx_buffer {
- /** pointer to the beginning of the buffer */
- float *buffer;
- /** the size of this buffer */
- long size;
- /** current position in the buffer */
- float *ptr;
- /** number of floats not yet consuned */
- long remaining;
- /** pointer to the next audio buffer */
- struct osx_buffer *next;
-};
-
-/** data specific to the osx writer */
+/** Data specific to the osx writer. */
struct private_osx_write_data {
- /** the main control structure for audio data manipulation */
+ /** The main CoreAudio handle. */
AudioUnit audio_unit;
- /** non-zero if playback has started */
- char play;
- /** 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 */
+ /** True if we wrote some audio data. */
+ bool playing;
+ /** Sample rate of the current audio stream. */
+ unsigned sample_rate;
+ /** Sample format of the current audio stream */
+ unsigned sample_format;
+ /** Number of channels of the current audio stream. */
unsigned channels;
+ /**
+ * Serializes access to buffer tree nodes between the writer and
+ * the callback which runs in a different thread.
+ */
+ int mutex;
+ /**
+ * The btr node of the callback.
+ *
+ * Although access to the btr node is serialized between the writer and
+ * the callback via the above mutex, this does not stop other buffer
+ * tree nodes, for example the decoder, to race against the osx
+ * callback.
+ *
+ * However, since all operations on buffer tree nodes are local in the
+ * sense that they only affect one level in the buffer tree (i.e.
+ * parent or child nodes, but not the grandparent or the
+ * grandchildren), we may work around this problem by using another
+ * buffer tree node for the callback.
+ *
+ * The writer grabs the mutex in its post_select method and pushes down
+ * the buffers to the callback node.
+ */
+ struct btr_node *callback_btrn;
};
-static void destroy_buffers(struct private_osx_write_data *powd)
-{
- struct osx_buffer *ptr;
- struct 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 writer_node *wn)
+/* This function writes the address and the number of bytes to one end of the socket.
+ * The post_select() function then fills the buffer and notifies the callback also
+ * through the socket.
+ */
+static OSStatus osx_callback(void *cb_arg, __a_unused AudioUnitRenderActionFlags *af,
+ __a_unused const AudioTimeStamp *ts, __a_unused UInt32 bus_number,
+ __a_unused UInt32 num_frames, AudioBufferList *abl)
{
- struct private_osx_write_data *powd = wn->private_data;
- struct osx_write_args_info *conf = wn->conf;
- struct osx_buffer **ptrptr;
int i;
+ struct writer_node *wn = cb_arg;
+ struct private_osx_write_data *powd;
+ size_t samples_have, samples_want = 0;
- ptrptr = &powd->to;
- for (i = 0; i < conf->numbuffers_arg; i++) {
- *ptrptr = para_malloc(sizeof(struct osx_buffer));
- (*ptrptr)->size = 0;
- (*ptrptr)->remaining = 0;
- (*ptrptr)->buffer = NULL;
- ptrptr = &(*ptrptr)->next;
- }
- *ptrptr = powd->from = powd->to;
-}
-
-static void fill_buffer(struct osx_buffer *b, short *source, long size)
-{
- float *dest;
-
- assert(b->remaining == 0 || size > 0);
- if (b->size != size) {
- b->buffer = para_realloc(b->buffer, size * sizeof(float));
- b->size = size;
+ powd = wn->private_data;
+ mutex_lock(powd->mutex);
+ powd = wn->private_data;
+ if (!powd || !wn->btrn)
+ goto out;
+ /*
+ * We fill with zeros if no data was yet written and we do not have
+ * enough to fill all buffers.
+ */
+ if (!powd->playing) {
+ size_t want = 0, have =
+ btr_get_input_queue_size(powd->callback_btrn);
+ for (i = 0; i < abl->mNumberBuffers; i++)
+ want += abl->mBuffers[i].mDataByteSize;
+ if (have < want) {
+ PARA_DEBUG_LOG("deferring playback (have = %zu < %zu = want)\n",
+ have, want);
+ for (i = 0; i < abl->mNumberBuffers; i++)
+ memset(abl->mBuffers[i].mData, 0,
+ abl->mBuffers[i].mDataByteSize);
+ goto out;
+ }
+ powd->playing = true;
}
- dest = b->buffer;
- while (size--)
- *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_write_data *powd = inClientData;
-// PARA_INFO_LOG("%p\n", powd);
- for (i = 0; i < outOutputData->mNumberBuffers; ++i) {
+ for (i = 0; i < abl->mNumberBuffers; i++) {
/* what we have to fill */
- m = outOutputData->mBuffers[i].mDataByteSize / sizeof(float);
- dest = outOutputData->mBuffers[i].mData;
- while (m > 0) {
- n = powd->from->remaining;
- if (n <= 0) {
- n = powd->from->next->remaining;
- if (n <= 0) {
- PARA_INFO_LOG("buffer underrun\n");
- return 0;
- }
- powd->from = powd->from->next;
- }
-// 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;
+ void *dest = abl->mBuffers[i].mData;
+ size_t sz = abl->mBuffers[i].mDataByteSize, samples, bytes;
+
+ samples_want = sz / wn->min_iqs;
+ while (samples_want > 0) {
+ char *buf;
+ btr_merge(powd->callback_btrn, wn->min_iqs);
+ samples_have = btr_next_buffer(powd->callback_btrn, &buf) / wn->min_iqs;
+ //PARA_INFO_LOG("i: %d want %zu samples to addr %p, have: %zu\n", i, samples_want,
+ // dest, samples_have);
+ samples = PARA_MIN(samples_have, samples_want);
+ if (samples == 0)
+ break;
+ bytes = samples * wn->min_iqs;
+ memcpy(dest, buf, bytes);
+ btr_consume(powd->callback_btrn, bytes);
+ samples_want -= samples;
+ dest += bytes;
}
+ if (samples_want == 0)
+ continue;
+ if (btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF) >= 0)
+ PARA_INFO_LOG("zero-padding (%zu samples)\n",
+ samples_want);
+ memset(dest, 0, samples_want * wn->min_iqs);
+ break;
}
- return 0;
+out:
+ mutex_unlock(powd->mutex);
+ return noErr;
}
-#ifdef WORDS_BIGENDIAN /* ppc */
-#define ENDIAN_FLAGS kLinearPCMFormatFlagIsBigEndian
-#else
-#define ENDIAN_FLAGS 0
-#endif
-
-static int osx_write_open(struct writer_node *wn)
+static int core_audio_init(struct writer_node *wn)
{
- struct private_osx_write_data *powd = para_calloc(
- sizeof(struct private_osx_write_data));
- ComponentDescription desc;
+ struct private_osx_write_data *powd = para_calloc(sizeof(*powd));
Component comp;
- AURenderCallbackStruct inputCallback = {osx_callback, powd};
- AudioStreamBasicDescription format;
int ret;
+ int32_t val;
+ AURenderCallbackStruct input_callback;
+ ComponentDescription desc = {
+ .componentType = kAudioUnitType_Output,
+ .componentSubType = kAudioUnitSubType_DefaultOutput,
+ .componentManufacturer = kAudioUnitManufacturer_Apple,
+ };
+ AudioStreamBasicDescription format = {
+ .mFormatID = kAudioFormatLinearPCM,
+ .mFramesPerPacket = 1,
+ };
struct btr_node *btrn = wn->btrn;
- struct osx_write_args_info *conf = wn->conf;
+ struct btr_node_description bnd;
- 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;
+ PARA_INFO_LOG("wn: %p\n", wn);
ret = -E_DEFAULT_COMP;
comp = FindNextComponent(NULL, &desc);
if (!comp)
ret = -E_UNIT_INIT;
if (AudioUnitInitialize(powd->audio_unit))
goto e1;
- powd->play = 0;
- powd->samplerate = conf->samplerate_arg;
- powd->channels = conf->channels_arg;
- if (!conf->samplerate_given) {
- int32_t rate;
- if (get_btr_samplerate(btrn, &rate) >= 0)
- powd->samplerate = rate;
- }
- if (!conf->channels_given) {
- int32_t ch;
- if (get_btr_channels(btrn, &ch) >= 0)
- powd->channels = ch;
- }
+ get_btr_sample_rate(btrn, &val);
+ powd->sample_rate = val;
+ get_btr_channels(btrn, &val);
+ powd->channels = val;
+ get_btr_sample_format(btrn, &val);
+ powd->sample_format = val;
/*
* 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
* any format conversions necessary from your format to the device's
* format.
*/
- format.mSampleRate = powd->samplerate;
- /* The specific encoding type of audio stream */
- format.mFormatID = kAudioFormatLinearPCM;
- /* flags specific to each format */
- format.mFormatFlags = kLinearPCMFormatFlagIsFloat
- | kLinearPCMFormatFlagIsPacked
- | ENDIAN_FLAGS;
+
+ format.mSampleRate = powd->sample_rate;
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;
+
+ switch (powd->sample_format) {
+ case SF_S8:
+ case SF_U8:
+ wn->min_iqs = powd->channels;
+ format.mBitsPerChannel = 8;
+ format.mBytesPerPacket = powd->channels;
+ format.mFormatFlags |= kLinearPCMFormatFlagIsPacked;
+ break;
+ default:
+ wn->min_iqs = powd->channels * 2;
+ format.mBytesPerPacket = powd->channels * 2;
+ format.mBitsPerChannel = 16;
+ format.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
+ }
+ format.mBytesPerFrame = format.mBytesPerPacket;
+
+ if (powd->sample_format == SF_S16_BE || powd->sample_format == SF_U16_BE)
+ format.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
+
+ input_callback = (AURenderCallbackStruct){osx_callback, wn};
ret = -E_STREAM_FORMAT;
if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_StreamFormat,
- kAudioUnitScope_Input, 0, &format,
- sizeof(AudioStreamBasicDescription)))
+ kAudioUnitScope_Input, 0, &format, sizeof(format)))
goto e2;
- init_buffers(wn);
ret = -E_ADD_CALLBACK;
if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_SetRenderCallback,
- kAudioUnitScope_Input, 0, &inputCallback,
- sizeof(inputCallback)) < 0)
- goto e3;
- wn->min_iqs = powd->channels * 2;
+ kAudioUnitScope_Input, 0, &input_callback,
+ sizeof(input_callback)) < 0)
+ goto e2;
+
+ ret = mutex_new();
+ if (ret < 0)
+ goto e2;
+ powd->mutex = ret;
+ /* set up callback btr node */
+ bnd.name = "cb_node";
+ bnd.parent = btrn;
+ bnd.child = NULL;
+ bnd.handler = NULL;
+ bnd.context = powd;
+ powd->callback_btrn = btr_new_node(&bnd);
+ wn->private_data = powd;
return 1;
-e3:
- destroy_buffers(powd);
e2:
AudioUnitUninitialize(powd->audio_unit);
e1:
CloseComponent(powd->audio_unit);
e0:
+ free(powd);
+ wn->private_data = NULL;
return ret;
}
-__malloc static void *osx_write_parse_config(const char *options)
+__malloc static void *osx_write_parse_config_or_die(int argc, char **argv)
{
- 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;
+ struct osx_write_args_info *conf = para_calloc(sizeof(*conf));
+ /* exits on errors */
+ osx_write_cmdline_parser(argc, argv, conf);
+ return conf;
}
static void osx_free_config(void *conf)
{
- osx_cmdline_parser_free(conf);
+ osx_write_cmdline_parser_free(conf);
}
static void osx_write_close(struct writer_node *wn)
{
struct private_osx_write_data *powd = wn->private_data;
+ if (!powd)
+ return;
PARA_INFO_LOG("closing writer node %p\n", wn);
- AudioOutputUnitStop(powd->audio_unit);
- AudioUnitUninitialize(powd->audio_unit);
- CloseComponent(powd->audio_unit);
- destroy_buffers(powd);
+ mutex_destroy(powd->mutex);
free(powd);
+ wn->private_data = NULL;
}
-static void osx_write_post_select(__a_unused struct sched *s, struct task *t)
+/* must be called with the mutex held */
+static inline bool need_drain_delay(struct private_osx_write_data *powd)
{
- struct writer_node *wn = container_of(t, struct writer_node, task);
+ if (!powd->playing)
+ return false;
+ return btr_get_input_queue_size(powd->callback_btrn) != 0;
+}
+
+static void osx_write_pre_select(struct sched *s, void *context)
+{
+ struct writer_node *wn = context;
struct private_osx_write_data *powd = wn->private_data;
- struct btr_node *btrn = wn->btrn;
- char *data;
- size_t bytes;
- int ret = 0;
+ int ret;
+ bool drain_delay_nec = false;
- while (powd->to->remaining <= 0) {
+ if (!powd) {
ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
- if (ret <= 0)
- break;
- btr_merge(btrn, 8192);
- bytes = btr_next_buffer(btrn, &data);
- //PARA_CRIT_LOG("have: %zu\n", bytes);
- fill_buffer(powd->to, (short *)data, bytes / sizeof(short));
- btr_consume(btrn, bytes);
- if (!powd->play) {
- ret = -E_UNIT_START;
- if (AudioOutputUnitStart(powd->audio_unit))
- break;
- powd->play = 1;
- }
- powd->to = powd->to->next;
+ if (ret != 0)
+ sched_min_delay(s);
+ return;
}
+
+ mutex_lock(powd->mutex);
+ ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_INTERNAL);
if (ret < 0)
- btr_remove_node(btrn);
- t->error = ret;
+ drain_delay_nec = need_drain_delay(powd);
+ mutex_unlock(powd->mutex);
+
+ if (drain_delay_nec)
+ return sched_request_timeout_ms(50, s);
+ if (ret != 0)
+ return sched_min_delay(s);
+ sched_request_timeout_ms(50, s);
}
-static void osx_write_pre_select(struct sched *s, struct task *t)
+static int osx_write_post_select(__a_unused struct sched *s, void *context)
{
- struct writer_node *wn = container_of(t, struct writer_node, task);
+ struct writer_node *wn = context;
struct private_osx_write_data *powd = wn->private_data;
- struct timeval tmp = {.tv_sec = 1, .tv_usec = 0}, delay = tmp;
- unsigned long divisor;
- size_t numbytes = powd->to->remaining * sizeof(short);
- int ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
+ struct btr_node *btrn = wn->btrn;
+ int ret;
+ ret = task_get_notification(wn->task);
if (ret < 0)
- sched_min_delay(s);
- if (ret <= 0 || numbytes < wn->min_iqs)
- return;
- divisor = powd->samplerate * wn->min_iqs / numbytes;
- if (divisor)
- tv_divide(divisor, &tmp, &delay);
- sched_request_timeout(&delay, s);
+ goto fail;
+ if (!powd) {
+ ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
+ if (ret == 0)
+ return 0;
+ if (ret < 0)
+ goto fail;
+ ret = core_audio_init(wn);
+ if (ret < 0)
+ goto fail;
+ powd = wn->private_data;
+ ret = -E_UNIT_START;
+ if (AudioOutputUnitStart(powd->audio_unit) != noErr) {
+ AudioUnitUninitialize(powd->audio_unit);
+ CloseComponent(powd->audio_unit);
+ btr_remove_node(&powd->callback_btrn);
+ goto fail;
+ }
+ }
+ mutex_lock(powd->mutex);
+ ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_INTERNAL);
+ if (ret > 0)
+ btr_pushdown(btrn);
+ if (ret < 0 && need_drain_delay(powd))
+ ret = 0;
+ mutex_unlock(powd->mutex);
+ if (ret >= 0)
+ return 0;
+fail:
+ assert(ret < 0);
+ if (powd && powd->callback_btrn) {
+ AudioOutputUnitStop(powd->audio_unit);
+ AudioUnitUninitialize(powd->audio_unit);
+ CloseComponent(powd->audio_unit);
+ btr_remove_node(&powd->callback_btrn);
+ }
+ btr_remove_node(&wn->btrn);
+ PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
+ return ret;
}
-/** the init function of the osx writer */
+/**
+ * The init function of the osx writer.
+ *
+ * \param w Filled in by the function.
+ */
void osx_write_init(struct writer *w)
{
struct osx_write_args_info dummy;
- osx_cmdline_parser_init(&dummy);
- w->open = osx_write_open;
+ osx_write_cmdline_parser_init(&dummy);
w->close = osx_write_close;
w->pre_select = osx_write_pre_select;
w->post_select = osx_write_post_select;
- w->parse_config = osx_write_parse_config;
+ w->parse_config_or_die = osx_write_parse_config_or_die;
w->free_config = osx_free_config;
- w->shutdown = NULL; /* nothing to do */
- w->help = (struct ggo_help) {
- .short_help = osx_write_args_info_help,
- .detailed_help = osx_write_args_info_detailed_help
- };
- osx_cmdline_parser_free(&dummy);
+ w->help = (struct ggo_help)DEFINE_GGO_HELP(osx_write);
+ osx_write_cmdline_parser_free(&dummy);
}
projects / paraslash.git / blobdiff