OboeService: initial commit
This builds a standalone service that is easy to test.
Bug: 33269952
Test: test_oboe_api
Change-Id: I1890b1b974e728c2c0c15e24aa02121c2774bd56
Signed-off-by: Phil Burk <philburk@google.com>
diff --git a/services/oboeservice/FakeAudioHal.cpp b/services/oboeservice/FakeAudioHal.cpp
new file mode 100644
index 0000000..7fa2eef
--- /dev/null
+++ b/services/oboeservice/FakeAudioHal.cpp
@@ -0,0 +1,227 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * Simple fake HAL that supports ALSA MMAP/NOIRQ mode.
+ */
+
+#include <iostream>
+#include <math.h>
+#include <limits>
+#include <string.h>
+#include <unistd.h>
+
+#define __force
+#define __bitwise
+#define __user
+#include <sound/asound.h>
+
+#include "tinyalsa/asoundlib.h"
+
+#include "FakeAudioHal.h"
+
+//using namespace oboe;
+
+using sample_t = int16_t;
+using std::cout;
+using std::endl;
+
+#undef SNDRV_PCM_IOCTL_SYNC_PTR
+#define SNDRV_PCM_IOCTL_SYNC_PTR 0xc0884123
+#define PCM_ERROR_MAX 128
+
+const int SAMPLE_RATE = 48000; // Hz
+const int CHANNEL_COUNT = 2;
+
+struct pcm {
+ int fd;
+ unsigned int flags;
+ int running:1;
+ int prepared:1;
+ int underruns;
+ unsigned int buffer_size;
+ unsigned int boundary;
+ char error[PCM_ERROR_MAX];
+ struct pcm_config config;
+ struct snd_pcm_mmap_status *mmap_status;
+ struct snd_pcm_mmap_control *mmap_control;
+ struct snd_pcm_sync_ptr *sync_ptr;
+ void *mmap_buffer;
+ unsigned int noirq_frames_per_msec;
+ int wait_for_avail_min;
+};
+
+static int pcm_sync_ptr(struct pcm *pcm, int flags) {
+ if (pcm->sync_ptr) {
+ pcm->sync_ptr->flags = flags;
+ if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_SYNC_PTR, pcm->sync_ptr) < 0)
+ return -1;
+ }
+ return 0;
+}
+
+int pcm_get_hw_ptr(struct pcm* pcm, unsigned int* hw_ptr) {
+ if (!hw_ptr || !pcm) return -EINVAL;
+
+ int result = pcm_sync_ptr(pcm, SNDRV_PCM_SYNC_PTR_HWSYNC);
+ if (!result) {
+ *hw_ptr = pcm->sync_ptr->s.status.hw_ptr;
+ }
+
+ return result;
+}
+
+typedef struct stream_tracker {
+ struct pcm * pcm;
+ int framesPerBurst;
+ sample_t * hwBuffer;
+ int32_t capacityInFrames;
+ int32_t capacityInBytes;
+} stream_tracker_t;
+
+#define FRAMES_PER_BURST_QUALCOMM 192
+#define FRAMES_PER_BURST_NVIDIA 128
+
+int fake_hal_open(int card_id, int device_id, fake_hal_stream_ptr *streamPP) {
+ int framesPerBurst = FRAMES_PER_BURST_QUALCOMM; // TODO update as needed
+ int periodCount = 32;
+ unsigned int offset1;
+ unsigned int frames1;
+ void *area = nullptr;
+ int mmapAvail = 0;
+
+ // Configuration for an ALSA stream.
+ pcm_config cfg;
+ memset(&cfg, 0, sizeof(cfg));
+ cfg.channels = CHANNEL_COUNT;
+ cfg.format = PCM_FORMAT_S16_LE;
+ cfg.rate = SAMPLE_RATE;
+ cfg.period_count = periodCount;
+ cfg.period_size = framesPerBurst;
+ cfg.start_threshold = 0; // for NOIRQ, should just start, was framesPerBurst;
+ cfg.stop_threshold = INT32_MAX;
+ cfg.silence_size = 0;
+ cfg.silence_threshold = 0;
+ cfg.avail_min = framesPerBurst;
+
+ stream_tracker_t *streamTracker = (stream_tracker_t *) malloc(sizeof(stream_tracker_t));
+ if (streamTracker == nullptr) {
+ return -1;
+ }
+ memset(streamTracker, 0, sizeof(stream_tracker_t));
+
+ streamTracker->pcm = pcm_open(card_id, device_id, PCM_OUT | PCM_MMAP | PCM_NOIRQ, &cfg);
+ if (streamTracker->pcm == nullptr) {
+ cout << "Could not open device." << endl;
+ free(streamTracker);
+ return -1;
+ }
+
+ streamTracker->framesPerBurst = cfg.period_size; // Get from ALSA
+ streamTracker->capacityInFrames = pcm_get_buffer_size(streamTracker->pcm);
+ streamTracker->capacityInBytes = pcm_frames_to_bytes(streamTracker->pcm, streamTracker->capacityInFrames);
+ std::cout << "fake_hal_open() streamTracker->framesPerBurst = " << streamTracker->framesPerBurst << std::endl;
+ std::cout << "fake_hal_open() streamTracker->capacityInFrames = " << streamTracker->capacityInFrames << std::endl;
+
+ if (pcm_is_ready(streamTracker->pcm) < 0) {
+ cout << "Device is not ready." << endl;
+ goto error;
+ }
+
+ if (pcm_prepare(streamTracker->pcm) < 0) {
+ cout << "Device could not be prepared." << endl;
+ cout << "For Marlin, please enter:" << endl;
+ cout << " adb shell" << endl;
+ cout << " tinymix \"QUAT_MI2S_RX Audio Mixer MultiMedia8\" 1" << endl;
+ goto error;
+ }
+ mmapAvail = pcm_mmap_avail(streamTracker->pcm);
+ if (mmapAvail <= 0) {
+ cout << "fake_hal_open() mmap_avail is <=0" << endl;
+ goto error;
+ }
+ cout << "fake_hal_open() mmap_avail = " << mmapAvail << endl;
+
+ // Where is the memory mapped area?
+ if (pcm_mmap_begin(streamTracker->pcm, &area, &offset1, &frames1) < 0) {
+ cout << "fake_hal_open() pcm_mmap_begin failed" << endl;
+ goto error;
+ }
+
+ // Clear the buffer.
+ memset((sample_t*) area, 0, streamTracker->capacityInBytes);
+ streamTracker->hwBuffer = (sample_t*) area;
+ streamTracker->hwBuffer[0] = 32000; // impulse
+
+ // Prime the buffer so it can start.
+ if (pcm_mmap_commit(streamTracker->pcm, 0, framesPerBurst) < 0) {
+ cout << "fake_hal_open() pcm_mmap_commit failed" << endl;
+ goto error;
+ }
+
+ *streamPP = streamTracker;
+ return 1;
+
+error:
+ fake_hal_close(streamTracker);
+ return -1;
+}
+
+int fake_hal_get_mmap_info(fake_hal_stream_ptr stream, mmap_buffer_info *info) {
+ stream_tracker_t *streamTracker = (stream_tracker_t *) stream;
+ info->fd = streamTracker->pcm->fd; // TODO use tinyalsa function
+ info->hw_buffer = streamTracker->hwBuffer;
+ info->burst_size_in_frames = streamTracker->framesPerBurst;
+ info->buffer_capacity_in_frames = streamTracker->capacityInFrames;
+ info->buffer_capacity_in_bytes = streamTracker->capacityInBytes;
+ info->sample_rate = SAMPLE_RATE;
+ info->channel_count = CHANNEL_COUNT;
+ return 0;
+}
+
+int fake_hal_start(fake_hal_stream_ptr stream) {
+ stream_tracker_t *streamTracker = (stream_tracker_t *) stream;
+ if (pcm_start(streamTracker->pcm) < 0) {
+ cout << "fake_hal_start failed" << endl;
+ return -1;
+ }
+ return 0;
+}
+
+int fake_hal_pause(fake_hal_stream_ptr stream) {
+ stream_tracker_t *streamTracker = (stream_tracker_t *) stream;
+ if (pcm_stop(streamTracker->pcm) < 0) {
+ cout << "fake_hal_stop failed" << endl;
+ return -1;
+ }
+ return 0;
+}
+
+int fake_hal_get_frame_counter(fake_hal_stream_ptr stream, int *frame_counter) {
+ stream_tracker_t *streamTracker = (stream_tracker_t *) stream;
+ if (pcm_get_hw_ptr(streamTracker->pcm, (unsigned int *)frame_counter) < 0) {
+ cout << "fake_hal_get_frame_counter failed" << endl;
+ return -1;
+ }
+ return 0;
+}
+
+int fake_hal_close(fake_hal_stream_ptr stream) {
+ stream_tracker_t *streamTracker = (stream_tracker_t *) stream;
+ pcm_close(streamTracker->pcm);
+ free(streamTracker);
+ return 0;
+}
+