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mpv/audio/out/ao_audiotrack.c

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/*
* Android AudioTrack audio output driver.
* Copyright (C) 2018 Aman Gupta <aman@tmm1.net>
* Copyright (C) 2012-2015 VLC authors and VideoLAN, VideoLabs
* Authors: Thomas Guillem <thomas@gllm.fr>
* Ming Hu <tewilove@gmail.com>
*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ao.h"
#include "internal.h"
#include "common/msg.h"
#include "audio/format.h"
#include "options/m_option.h"
#include "osdep/threads.h"
#include "osdep/timer.h"
#include "misc/jni.h"
struct priv {
jobject audiotrack;
jint samplerate;
jint channel_config;
jint format;
jint size;
jobject timestamp;
int64_t timestamp_fetched;
bool timestamp_set;
int timestamp_stable;
uint32_t written_frames; /* requires uint32_t rollover semantics */
uint32_t playhead_pos;
uint32_t playhead_offset;
bool reset_pending;
void *chunk;
int chunksize;
jbyteArray bytearray;
jshortArray shortarray;
jfloatArray floatarray;
jobject bbuf;
int cfg_pcm_float;
int cfg_session_id;
bool needs_timestamp_offset;
int64_t timestamp_offset;
bool thread_terminate;
bool thread_created;
pthread_t thread;
pthread_mutex_t lock;
pthread_cond_t wakeup;
};
struct JNIByteBuffer {
jclass clazz;
jmethodID clear;
struct MPJniField mapping[];
} ByteBuffer = {.mapping = {
#define OFFSET(member) offsetof(struct JNIByteBuffer, member)
{"java/nio/ByteBuffer", NULL, NULL, MP_JNI_CLASS, OFFSET(clazz), 1},
{"java/nio/ByteBuffer", "clear", "()Ljava/nio/Buffer;", MP_JNI_METHOD, OFFSET(clear), 1},
{0},
#undef OFFSET
}};
struct JNIAudioTrack {
jclass clazz;
jmethodID ctor;
jmethodID release;
jmethodID getState;
jmethodID getPlayState;
jmethodID play;
jmethodID stop;
jmethodID flush;
jmethodID pause;
jmethodID write;
jmethodID writeFloat;
jmethodID writeV23;
jmethodID writeShortV23;
jmethodID writeBufferV21;
jmethodID getPlaybackHeadPosition;
jmethodID getTimestamp;
jmethodID getLatency;
jmethodID getMinBufferSize;
jmethodID getNativeOutputSampleRate;
jint STATE_INITIALIZED;
jint PLAYSTATE_STOPPED;
jint PLAYSTATE_PAUSED;
jint PLAYSTATE_PLAYING;
jint MODE_STREAM;
jint ERROR;
jint ERROR_BAD_VALUE;
jint ERROR_INVALID_OPERATION;
jint WRITE_BLOCKING;
jint WRITE_NON_BLOCKING;
struct MPJniField mapping[];
} AudioTrack = {.mapping = {
#define OFFSET(member) offsetof(struct JNIAudioTrack, member)
{"android/media/AudioTrack", NULL, NULL, MP_JNI_CLASS, OFFSET(clazz), 1},
{"android/media/AudioTrack", "<init>", "(IIIIIII)V", MP_JNI_METHOD, OFFSET(ctor), 1},
{"android/media/AudioTrack", "release", "()V", MP_JNI_METHOD, OFFSET(release), 1},
{"android/media/AudioTrack", "getState", "()I", MP_JNI_METHOD, OFFSET(getState), 1},
{"android/media/AudioTrack", "getPlayState", "()I", MP_JNI_METHOD, OFFSET(getPlayState), 1},
{"android/media/AudioTrack", "play", "()V", MP_JNI_METHOD, OFFSET(play), 1},
{"android/media/AudioTrack", "stop", "()V", MP_JNI_METHOD, OFFSET(stop), 1},
{"android/media/AudioTrack", "flush", "()V", MP_JNI_METHOD, OFFSET(flush), 1},
{"android/media/AudioTrack", "pause", "()V", MP_JNI_METHOD, OFFSET(pause), 1},
{"android/media/AudioTrack", "write", "([BII)I", MP_JNI_METHOD, OFFSET(write), 1},
{"android/media/AudioTrack", "write", "([FIII)I", MP_JNI_METHOD, OFFSET(writeFloat), 1},
{"android/media/AudioTrack", "write", "([BIII)I", MP_JNI_METHOD, OFFSET(writeV23), 0},
{"android/media/AudioTrack", "write", "([SIII)I", MP_JNI_METHOD, OFFSET(writeShortV23), 0},
{"android/media/AudioTrack", "write", "(Ljava/nio/ByteBuffer;II)I", MP_JNI_METHOD, OFFSET(writeBufferV21), 1},
{"android/media/AudioTrack", "getTimestamp", "(Landroid/media/AudioTimestamp;)Z", MP_JNI_METHOD, OFFSET(getTimestamp), 1},
{"android/media/AudioTrack", "getPlaybackHeadPosition", "()I", MP_JNI_METHOD, OFFSET(getPlaybackHeadPosition), 1},
{"android/media/AudioTrack", "getLatency", "()I", MP_JNI_METHOD, OFFSET(getLatency), 1},
{"android/media/AudioTrack", "getMinBufferSize", "(III)I", MP_JNI_STATIC_METHOD, OFFSET(getMinBufferSize), 1},
{"android/media/AudioTrack", "getNativeOutputSampleRate", "(I)I", MP_JNI_STATIC_METHOD, OFFSET(getNativeOutputSampleRate), 1},
{"android/media/AudioTrack", "WRITE_BLOCKING", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(WRITE_BLOCKING), 0},
{"android/media/AudioTrack", "WRITE_NON_BLOCKING", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(WRITE_NON_BLOCKING), 0},
{"android/media/AudioTrack", "STATE_INITIALIZED", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(STATE_INITIALIZED), 1},
{"android/media/AudioTrack", "PLAYSTATE_STOPPED", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(PLAYSTATE_STOPPED), 1},
{"android/media/AudioTrack", "PLAYSTATE_PAUSED", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(PLAYSTATE_PAUSED), 1},
{"android/media/AudioTrack", "PLAYSTATE_PLAYING", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(PLAYSTATE_PLAYING), 1},
{"android/media/AudioTrack", "MODE_STREAM", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(MODE_STREAM), 1},
{"android/media/AudioTrack", "ERROR", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(ERROR), 1},
{"android/media/AudioTrack", "ERROR_BAD_VALUE", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(ERROR_BAD_VALUE), 1},
{"android/media/AudioTrack", "ERROR_INVALID_OPERATION", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(ERROR_INVALID_OPERATION), 1},
{0}
#undef OFFSET
}};
struct JNIAudioFormat {
jclass clazz;
jint ENCODING_PCM_8BIT;
jint ENCODING_PCM_16BIT;
jint ENCODING_PCM_FLOAT;
jint ENCODING_IEC61937;
jint ENCODING_AC3;
jint CHANNEL_OUT_MONO;
jint CHANNEL_OUT_STEREO;
jint CHANNEL_OUT_FRONT_LEFT;
jint CHANNEL_OUT_FRONT_RIGHT;
jint CHANNEL_OUT_BACK_LEFT;
jint CHANNEL_OUT_BACK_RIGHT;
jint CHANNEL_OUT_FRONT_CENTER;
jint CHANNEL_OUT_LOW_FREQUENCY;
jint CHANNEL_OUT_BACK_CENTER;
jint CHANNEL_OUT_5POINT1;
jint CHANNEL_OUT_SIDE_LEFT;
jint CHANNEL_OUT_SIDE_RIGHT;
struct MPJniField mapping[];
} AudioFormat = {.mapping = {
#define OFFSET(member) offsetof(struct JNIAudioFormat, member)
{"android/media/AudioFormat", NULL, NULL, MP_JNI_CLASS, OFFSET(clazz), 1},
{"android/media/AudioFormat", "ENCODING_PCM_8BIT", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(ENCODING_PCM_8BIT), 1},
{"android/media/AudioFormat", "ENCODING_PCM_16BIT", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(ENCODING_PCM_16BIT), 1},
{"android/media/AudioFormat", "ENCODING_PCM_FLOAT", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(ENCODING_PCM_FLOAT), 1},
{"android/media/AudioFormat", "ENCODING_AC3", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(ENCODING_AC3), 0},
{"android/media/AudioFormat", "ENCODING_IEC61937", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(ENCODING_IEC61937), 0},
{"android/media/AudioFormat", "CHANNEL_OUT_MONO", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(CHANNEL_OUT_MONO), 1},
{"android/media/AudioFormat", "CHANNEL_OUT_STEREO", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(CHANNEL_OUT_STEREO), 1},
{"android/media/AudioFormat", "CHANNEL_OUT_5POINT1", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(CHANNEL_OUT_5POINT1), 1},
{"android/media/AudioFormat", "CHANNEL_OUT_FRONT_LEFT", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(CHANNEL_OUT_FRONT_LEFT), 1},
{"android/media/AudioFormat", "CHANNEL_OUT_FRONT_RIGHT", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(CHANNEL_OUT_FRONT_RIGHT), 1},
{"android/media/AudioFormat", "CHANNEL_OUT_FRONT_CENTER", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(CHANNEL_OUT_FRONT_CENTER), 1},
{"android/media/AudioFormat", "CHANNEL_OUT_LOW_FREQUENCY", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(CHANNEL_OUT_LOW_FREQUENCY), 1},
{"android/media/AudioFormat", "CHANNEL_OUT_BACK_LEFT", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(CHANNEL_OUT_BACK_LEFT), 1},
{"android/media/AudioFormat", "CHANNEL_OUT_BACK_RIGHT", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(CHANNEL_OUT_BACK_RIGHT), 1},
{"android/media/AudioFormat", "CHANNEL_OUT_BACK_CENTER", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(CHANNEL_OUT_BACK_CENTER), 1},
{"android/media/AudioFormat", "CHANNEL_OUT_SIDE_LEFT", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(CHANNEL_OUT_SIDE_LEFT), 0},
{"android/media/AudioFormat", "CHANNEL_OUT_SIDE_RIGHT", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(CHANNEL_OUT_SIDE_RIGHT), 0},
{0}
#undef OFFSET
}};
struct JNIAudioManager {
jclass clazz;
jint ERROR_DEAD_OBJECT;
jint STREAM_MUSIC;
struct MPJniField mapping[];
} AudioManager = {.mapping = {
#define OFFSET(member) offsetof(struct JNIAudioManager, member)
{"android/media/AudioManager", NULL, NULL, MP_JNI_CLASS, OFFSET(clazz), 1},
{"android/media/AudioManager", "STREAM_MUSIC", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(STREAM_MUSIC), 1},
{"android/media/AudioManager", "ERROR_DEAD_OBJECT", "I", MP_JNI_STATIC_FIELD_AS_INT, OFFSET(ERROR_DEAD_OBJECT), 0},
{0}
#undef OFFSET
}};
struct JNIAudioTimestamp {
jclass clazz;
jmethodID ctor;
jfieldID framePosition;
jfieldID nanoTime;
struct MPJniField mapping[];
} AudioTimestamp = {.mapping = {
#define OFFSET(member) offsetof(struct JNIAudioTimestamp, member)
{"android/media/AudioTimestamp", NULL, NULL, MP_JNI_CLASS, OFFSET(clazz), 1},
{"android/media/AudioTimestamp", "<init>", "()V", MP_JNI_METHOD, OFFSET(ctor), 1},
{"android/media/AudioTimestamp", "framePosition", "J", MP_JNI_FIELD, OFFSET(framePosition), 1},
{"android/media/AudioTimestamp", "nanoTime", "J", MP_JNI_FIELD, OFFSET(nanoTime), 1},
{0}
#undef OFFSET
}};
static int AudioTrack_New(struct ao *ao)
{
struct priv *p = ao->priv;
JNIEnv *env = MP_JNI_GET_ENV(ao);
jobject audiotrack = MP_JNI_NEW(
AudioTrack.clazz,
AudioTrack.ctor,
AudioManager.STREAM_MUSIC,
p->samplerate,
p->channel_config,
p->format,
p->size,
AudioTrack.MODE_STREAM,
p->cfg_session_id
);
if (!audiotrack || MP_JNI_EXCEPTION_LOG(ao) < 0) {
MP_FATAL(ao, "AudioTrack Init failed\n");
return -1;
}
if (MP_JNI_CALL_INT(audiotrack, AudioTrack.getState) != AudioTrack.STATE_INITIALIZED) {
MP_JNI_CALL_VOID(audiotrack, AudioTrack.release);
MP_JNI_EXCEPTION_LOG(ao);
(*env)->DeleteLocalRef(env, audiotrack);
MP_ERR(ao, "AudioTrack.getState failed\n");
return -1;
}
p->audiotrack = (*env)->NewGlobalRef(env, audiotrack);
(*env)->DeleteLocalRef(env, audiotrack);
if (!p->audiotrack)
return -1;
return 0;
}
static int AudioTrack_Recreate(struct ao *ao)
{
struct priv *p = ao->priv;
JNIEnv *env = MP_JNI_GET_ENV(ao);
MP_JNI_CALL_VOID(p->audiotrack, AudioTrack.release);
MP_JNI_EXCEPTION_LOG(ao);
(*env)->DeleteGlobalRef(env, p->audiotrack);
p->audiotrack = NULL;
return AudioTrack_New(ao);
}
static uint32_t AudioTrack_getPlaybackHeadPosition(struct ao *ao)
{
struct priv *p = ao->priv;
if (!p->audiotrack)
return 0;
JNIEnv *env = MP_JNI_GET_ENV(ao);
uint32_t pos = 0;
int64_t now = mp_raw_time_us();
int state = MP_JNI_CALL_INT(p->audiotrack, AudioTrack.getPlayState);
int stable_count = 20;
int64_t wait = p->timestamp_stable < stable_count ? 50000 : 3000000;
if (state == AudioTrack.PLAYSTATE_PLAYING && p->format != AudioFormat.ENCODING_IEC61937 &&
(p->timestamp_fetched == 0 || now - p->timestamp_fetched >= wait)) {
if (!p->timestamp_fetched)
p->timestamp_stable = 0;
int64_t utime1 = MP_JNI_GET_LONG(p->timestamp, AudioTimestamp.nanoTime) / 1000;
if (MP_JNI_CALL_BOOL(p->audiotrack, AudioTrack.getTimestamp, p->timestamp)) {
p->timestamp_set = true;
p->timestamp_fetched = now;
if (p->timestamp_stable < stable_count) {
uint32_t fpos = 0xFFFFFFFFL & MP_JNI_GET_LONG(p->timestamp, AudioTimestamp.framePosition);
int64_t utime2 = MP_JNI_GET_LONG(p->timestamp, AudioTimestamp.nanoTime) / 1000;
//MP_VERBOSE(ao, "getTimestamp: fpos= %u / time= %"PRId64" / now= %"PRId64" / stable= %d\n", fpos, utime2, now, p->timestamp_stable);
if (utime1 != utime2 && utime2 != 0 && fpos != 0) {
p->timestamp_stable++;
}
}
}
}
/* AudioTrack's framePosition and playbackHeadPosition return a signed integer,
* but documentation states it should be interpreted as a 32-bit unsigned integer.
*/
if (p->timestamp_set) {
pos = 0xFFFFFFFFL & MP_JNI_GET_LONG(p->timestamp, AudioTimestamp.framePosition);
uint32_t fpos = pos;
int64_t utime = MP_JNI_GET_LONG(p->timestamp, AudioTimestamp.nanoTime) / 1000;
if (utime == 0)
fpos = pos = 0;
if (p->needs_timestamp_offset) {
if (utime != 0 && !p->timestamp_offset)
p->timestamp_offset = now - utime;
utime += p->timestamp_offset;
}
if (fpos != 0 && utime != 0 && state == AudioTrack.PLAYSTATE_PLAYING) {
double diff = (double)(now - utime) / 1e6;
pos += diff * ao->samplerate;
}
//MP_VERBOSE(ao, "position = %u via getTimestamp (state = %d / fpos= %u / time= %"PRId64")\n", pos, state, fpos, utime);
} else {
pos = 0xFFFFFFFFL & MP_JNI_CALL_INT(p->audiotrack, AudioTrack.getPlaybackHeadPosition);
//MP_VERBOSE(ao, "playbackHeadPosition = %u (reset_pending=%d)\n", pos, p->reset_pending);
}
if (p->format == AudioFormat.ENCODING_IEC61937) {
if (p->reset_pending) {
// after a flush(), playbackHeadPosition will not reset to 0 right away.
// sometimes, it will never reset at all.
// save the initial offset after the reset, to subtract it going forward.
if (p->playhead_offset == 0)
p->playhead_offset = pos;
p->reset_pending = false;
MP_VERBOSE(ao, "IEC/playbackHead offset = %d\n", pos);
}
// usually shortly after a flush(), playbackHeadPosition will reset to 0.
// clear out the position and offset to avoid regular "rollover" below
if (pos == 0 && p->playhead_offset != 0) {
MP_VERBOSE(ao, "IEC/playbackHeadPosition %d -> %d (flush)\n", p->playhead_pos, pos);
p->playhead_offset = 0;
p->playhead_pos = 0;
}
// sometimes on a new AudioTrack instance, playbackHeadPosition will reset
// to 0 shortly after playback starts for no reason.
if (pos == 0 && p->playhead_pos != 0) {
MP_VERBOSE(ao, "IEC/playbackHeadPosition %d -> %d (reset)\n", p->playhead_pos, pos);
p->playhead_offset = 0;
p->playhead_pos = 0;
p->written_frames = 0;
}
}
p->playhead_pos = pos;
return p->playhead_pos - p->playhead_offset;
}
static double AudioTrack_getLatency(struct ao *ao)
{
JNIEnv *env = MP_JNI_GET_ENV(ao);
struct priv *p = ao->priv;
if (!p->audiotrack)
return 0;
uint32_t playhead = AudioTrack_getPlaybackHeadPosition(ao);
uint32_t diff = p->written_frames - playhead;
double delay = diff / (double)(ao->samplerate);
if (!p->timestamp_set &&
p->format != AudioFormat.ENCODING_IEC61937)
delay += (double)MP_JNI_CALL_INT(p->audiotrack, AudioTrack.getLatency)/1000.0;
if (delay > 1.0) {
//MP_WARN(ao, "getLatency: written=%u playhead=%u diff=%u delay=%f\n", p->written_frames, playhead, diff, delay);
p->timestamp_fetched = 0;
return 0;
}
return MPCLAMP(delay, 0.0, 1.0);
}
static int AudioTrack_write(struct ao *ao, int len)
{
struct priv *p = ao->priv;
if (!p->audiotrack)
return -1;
JNIEnv *env = MP_JNI_GET_ENV(ao);
void *buf = p->chunk;
jint ret;
if (p->format == AudioFormat.ENCODING_IEC61937) {
(*env)->SetShortArrayRegion(env, p->shortarray, 0, len / 2, buf);
if (MP_JNI_EXCEPTION_LOG(ao) < 0) return -1;
ret = MP_JNI_CALL_INT(p->audiotrack, AudioTrack.writeShortV23, p->shortarray, 0, len / 2, AudioTrack.WRITE_BLOCKING);
if (MP_JNI_EXCEPTION_LOG(ao) < 0) return -1;
if (ret > 0) ret *= 2;
} else if (p->format == AudioFormat.ENCODING_PCM_FLOAT) {
(*env)->SetFloatArrayRegion(env, p->floatarray, 0, len / sizeof(float), buf);
if (MP_JNI_EXCEPTION_LOG(ao) < 0) return -1;
ret = MP_JNI_CALL_INT(p->audiotrack, AudioTrack.writeFloat, p->floatarray, 0, len / sizeof(float), AudioTrack.WRITE_BLOCKING);
if (MP_JNI_EXCEPTION_LOG(ao) < 0) return -1;
if (ret > 0) ret *= sizeof(float);
} else if (AudioTrack.writeBufferV21) {
jobject bbuf = MP_JNI_CALL_OBJECT(p->bbuf, ByteBuffer.clear);
if (MP_JNI_EXCEPTION_LOG(ao) < 0) return -1;
(*env)->DeleteLocalRef(env, bbuf);
ret = MP_JNI_CALL_INT(p->audiotrack, AudioTrack.writeBufferV21, p->bbuf, len, AudioTrack.WRITE_BLOCKING);
if (MP_JNI_EXCEPTION_LOG(ao) < 0) return -1;
} else {
(*env)->SetByteArrayRegion(env, p->bytearray, 0, len, buf);
if (MP_JNI_EXCEPTION_LOG(ao) < 0) return -1;
ret = MP_JNI_CALL_INT(p->audiotrack, AudioTrack.write, p->bytearray, 0, len);
if (MP_JNI_EXCEPTION_LOG(ao) < 0) return -1;
}
return ret;
}
static void uninit_jni(struct ao *ao)
{
JNIEnv *env = MP_JNI_GET_ENV(ao);
mp_jni_reset_jfields(env, &AudioTrack, AudioTrack.mapping, 1, ao->log);
mp_jni_reset_jfields(env, &AudioTimestamp, AudioTimestamp.mapping, 1, ao->log);
mp_jni_reset_jfields(env, &AudioManager, AudioManager.mapping, 1, ao->log);
mp_jni_reset_jfields(env, &AudioFormat, AudioFormat.mapping, 1, ao->log);
mp_jni_reset_jfields(env, &ByteBuffer, ByteBuffer.mapping, 1, ao->log);
}
static int init_jni(struct ao *ao)
{
JNIEnv *env = MP_JNI_GET_ENV(ao);
if (mp_jni_init_jfields(env, &AudioTrack, AudioTrack.mapping, 1, ao->log) < 0 ||
mp_jni_init_jfields(env, &ByteBuffer, ByteBuffer.mapping, 1, ao->log) < 0 ||
mp_jni_init_jfields(env, &AudioTimestamp, AudioTimestamp.mapping, 1, ao->log) < 0 ||
mp_jni_init_jfields(env, &AudioManager, AudioManager.mapping, 1, ao->log) < 0 ||
mp_jni_init_jfields(env, &AudioFormat, AudioFormat.mapping, 1, ao->log) < 0) {
uninit_jni(ao);
return -1;
}
return 0;
}
static void *playthread(void *arg)
{
struct ao *ao = arg;
struct priv *p = ao->priv;
JNIEnv *env = MP_JNI_GET_ENV(ao);
mpthread_set_name("audiotrack");
pthread_mutex_lock(&p->lock);
while (!p->thread_terminate) {
int state = AudioTrack.PLAYSTATE_PAUSED;
if (p->audiotrack) {
state = MP_JNI_CALL_INT(p->audiotrack, AudioTrack.getPlayState);
}
if (state == AudioTrack.PLAYSTATE_PLAYING) {
int read_samples = p->chunksize / ao->sstride;
int64_t ts = mp_time_us();
ts += (read_samples / (double)(ao->samplerate)) * 1e6;
ts += AudioTrack_getLatency(ao) * 1e6;
int samples = ao_read_data(ao, &p->chunk, read_samples, ts);
int write_samples = read_samples;
int ret = AudioTrack_write(ao, write_samples * ao->sstride);
if (ret >= 0) {
p->written_frames += ret / ao->sstride;
} else if (ret == AudioManager.ERROR_DEAD_OBJECT) {
MP_WARN(ao, "AudioTrack.write failed with ERROR_DEAD_OBJECT. Recreating AudioTrack...\n");
if (AudioTrack_Recreate(ao) < 0) {
MP_ERR(ao, "AudioTrack_Recreate failed\n");
}
} else {
MP_ERR(ao, "AudioTrack.write failed with %d\n", ret);
}
} else {
struct timespec wait = mp_rel_time_to_timespec(0.300);
pthread_cond_timedwait(&p->wakeup, &p->lock, &wait);
}
}
pthread_mutex_unlock(&p->lock);
return NULL;
}
static void uninit(struct ao *ao)
{
struct priv *p = ao->priv;
JNIEnv *env = MP_JNI_GET_ENV(ao);
if (p->audiotrack) {
MP_JNI_CALL_VOID(p->audiotrack, AudioTrack.stop);
MP_JNI_EXCEPTION_LOG(ao);
MP_JNI_CALL_VOID(p->audiotrack, AudioTrack.flush);
MP_JNI_EXCEPTION_LOG(ao);
}
pthread_mutex_lock(&p->lock);
p->thread_terminate = true;
pthread_cond_signal(&p->wakeup);
pthread_mutex_unlock(&p->lock);
if (p->thread_created)
pthread_join(p->thread, NULL);
if (p->audiotrack) {
MP_JNI_CALL_VOID(p->audiotrack, AudioTrack.release);
MP_JNI_EXCEPTION_LOG(ao);
(*env)->DeleteGlobalRef(env, p->audiotrack);
p->audiotrack = NULL;
}
if (p->bytearray) {
(*env)->DeleteGlobalRef(env, p->bytearray);
p->bytearray = NULL;
}
if (p->shortarray) {
(*env)->DeleteGlobalRef(env, p->shortarray);
p->shortarray = NULL;
}
if (p->floatarray) {
(*env)->DeleteGlobalRef(env, p->floatarray);
p->floatarray = NULL;
}
if (p->bbuf) {
(*env)->DeleteGlobalRef(env, p->bbuf);
p->bbuf = NULL;
}
if (p->timestamp) {
(*env)->DeleteGlobalRef(env, p->timestamp);
p->timestamp = NULL;
}
if (p->chunk) {
free(p->chunk);
p->chunk = NULL;
}
pthread_cond_destroy(&p->wakeup);
pthread_mutex_destroy(&p->lock);
uninit_jni(ao);
}
static int init(struct ao *ao)
{
struct priv *p = ao->priv;
JNIEnv *env = MP_JNI_GET_ENV(ao);
if (!env)
return -1;
pthread_mutex_init(&p->lock, NULL);
pthread_cond_init(&p->wakeup, NULL);
if (init_jni(ao) < 0)
return -1;
if (af_fmt_is_spdif(ao->format)) {
p->format = AudioFormat.ENCODING_IEC61937;
} else if (ao->format == AF_FORMAT_U8) {
p->format = AudioFormat.ENCODING_PCM_8BIT;
} else if (p->cfg_pcm_float && (ao->format == AF_FORMAT_FLOAT || ao->format == AF_FORMAT_FLOATP)) {
ao->format = AF_FORMAT_FLOAT;
p->format = AudioFormat.ENCODING_PCM_FLOAT;
} else {
ao->format = AF_FORMAT_S16;
p->format = AudioFormat.ENCODING_PCM_16BIT;
}
if (AudioTrack.getNativeOutputSampleRate) {
jint samplerate = MP_JNI_CALL_STATIC_INT(
AudioTrack.clazz,
AudioTrack.getNativeOutputSampleRate,
AudioManager.STREAM_MUSIC
);
if (MP_JNI_EXCEPTION_LOG(ao) == 0) {
ao->samplerate = samplerate;
MP_VERBOSE(ao, "AudioTrack.nativeOutputSampleRate = %d\n", samplerate);
}
}
p->samplerate = ao->samplerate;
if (p->format == AudioFormat.ENCODING_IEC61937) {
p->channel_config = AudioFormat.CHANNEL_OUT_STEREO;
} else if (ao->channels.num == 1) {
p->channel_config = AudioFormat.CHANNEL_OUT_MONO;
} else if (ao->channels.num == 6) {
p->channel_config = AudioFormat.CHANNEL_OUT_5POINT1;
ao->channels = (struct mp_chmap)MP_CHMAP6(FL, FR, FC, LFE, BL, BR);
} else {
p->channel_config = AudioFormat.CHANNEL_OUT_STEREO;
ao->channels = (struct mp_chmap)MP_CHMAP_INIT_STEREO;
}
jint buffer_size = MP_JNI_CALL_STATIC_INT(
AudioTrack.clazz,
AudioTrack.getMinBufferSize,
p->samplerate,
p->channel_config,
p->format
);
if (buffer_size <= 0 || MP_JNI_EXCEPTION_LOG(ao) < 0) {
MP_FATAL(ao, "AudioTrack.getMinBufferSize returned an invalid size: %d", buffer_size);
return -1;
}
p->chunksize = buffer_size;
p->chunk = malloc(buffer_size);
int min = 0.200 * p->samplerate * af_fmt_to_bytes(ao->format);
int max = min * 3 / 2;
p->size = MPCLAMP(buffer_size * 2, min, max);
MP_VERBOSE(ao, "Setting bufferSize = %d (driver=%d, min=%d, max=%d)\n", p->size, buffer_size, min, max);
ao->device_buffer = p->size / af_fmt_to_bytes(ao->format);
jobject timestamp = MP_JNI_NEW(AudioTimestamp.clazz, AudioTimestamp.ctor);
if (!timestamp || MP_JNI_EXCEPTION_LOG(ao) < 0) {
MP_FATAL(ao, "AudioTimestamp could not be created\n");
return -1;
}
p->timestamp = (*env)->NewGlobalRef(env, timestamp);
(*env)->DeleteLocalRef(env, timestamp);
if (p->format == AudioFormat.ENCODING_IEC61937) {
jshortArray shortarray = (*env)->NewShortArray(env, p->chunksize / 2);
p->shortarray = (*env)->NewGlobalRef(env, shortarray);
(*env)->DeleteLocalRef(env, shortarray);
} else if (p->format == AudioFormat.ENCODING_PCM_FLOAT) {
jfloatArray floatarray = (*env)->NewFloatArray(env, p->chunksize / sizeof(float));
p->floatarray = (*env)->NewGlobalRef(env, floatarray);
(*env)->DeleteLocalRef(env, floatarray);
} else if (AudioTrack.writeBufferV21) {
jobject bbuf = (*env)->NewDirectByteBuffer(env, p->chunk, p->chunksize);
p->bbuf = (*env)->NewGlobalRef(env, bbuf);
(*env)->DeleteLocalRef(env, bbuf);
} else {
jbyteArray bytearray = (*env)->NewByteArray(env, p->chunksize);
p->bytearray = (*env)->NewGlobalRef(env, bytearray);
(*env)->DeleteLocalRef(env, bytearray);
}
/* create AudioTrack object */
if (AudioTrack_New(ao) != 0) {
MP_FATAL(ao, "Failed to create AudioTrack\n");
goto error;
}
if (pthread_create(&p->thread, NULL, playthread, ao)) {
MP_ERR(ao, "pthread creation failed\n");
goto error;
}
p->thread_created = true;
return 1;
error:
uninit(ao);
return -1;
}
static void stop(struct ao *ao)
{
struct priv *p = ao->priv;
if (!p->audiotrack) {
MP_ERR(ao, "AudioTrack does not exist to stop!\n");
return;
}
JNIEnv *env = MP_JNI_GET_ENV(ao);
MP_JNI_CALL_VOID(p->audiotrack, AudioTrack.pause);
MP_JNI_EXCEPTION_LOG(ao);
MP_JNI_CALL_VOID(p->audiotrack, AudioTrack.flush);
MP_JNI_EXCEPTION_LOG(ao);
p->playhead_offset = 0;
p->reset_pending = true;
p->written_frames = 0;
p->timestamp_fetched = 0;
p->timestamp_set = false;
p->timestamp_offset = 0;
}
static void start(struct ao *ao)
{
struct priv *p = ao->priv;
if (!p->audiotrack) {
MP_ERR(ao, "AudioTrack does not exist to start!\n");
return;
}
JNIEnv *env = MP_JNI_GET_ENV(ao);
MP_JNI_CALL_VOID(p->audiotrack, AudioTrack.play);
MP_JNI_EXCEPTION_LOG(ao);
pthread_cond_signal(&p->wakeup);
}
#define OPT_BASE_STRUCT struct priv
const struct ao_driver audio_out_audiotrack = {
.description = "Android AudioTrack audio output",
.name = "audiotrack",
.init = init,
.uninit = uninit,
.reset = stop,
.resume = start,
.priv_size = sizeof(struct priv),
.options = (const struct m_option[]) {
{"pcm-float", OPT_FLAG(cfg_pcm_float)},
{"session-id", OPT_INT(cfg_session_id)},
{0}
},
.options_prefix = "audiotrack",
};
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