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pull/166/head
xufulong 5 years ago
parent 781ec7444e
commit 3e4def578d
2 changed files with 65 additions and 81 deletions
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  1. 8
      app/src/main/cpp/ffprobe_cmd.c
  2. 128
      app/src/main/cpp/media_player.c

8
app/src/main/cpp/ffprobe_cmd.c
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@ -8,19 +8,19 @@
#include <ffmpeg_jni_define.h>
#include <ffmpeg/ffprobe.h>
FFMPEG_FUNC(jstring , handleProbe, jobjectArray commands) {
FFMPEG_FUNC(jstring, handleProbe, jobjectArray commands) {
int argc = (*env)->GetArrayLength(env, commands);
char **argv = (char**)malloc(argc * sizeof(char*));
char **argv = (char **) malloc(argc * sizeof(char *));
int i;
for (i = 0; i < argc; i++) {
jstring jstr = (jstring) (*env)->GetObjectArrayElement(env, commands, i);
char* temp = (char*) (*env)->GetStringUTFChars(env, jstr, 0);
char *temp = (char *) (*env)->GetStringUTFChars(env, jstr, 0);
argv[i] = malloc(1024);
strcpy(argv[i], temp);
(*env)->ReleaseStringUTFChars(env, jstr, temp);
}
//execute ffprobe command
char* result = ffprobe_run(argc, argv);
char *result = ffprobe_run(argc, argv);
//release memory
for (i = 0; i < argc; i++) {
free(argv[i]);

128
app/src/main/cpp/media_player.c
Unescape View File

@ -72,23 +72,23 @@ jint JNICALL JNI_OnLoad(JavaVM* vm, void* reserved){
return JNI_VERSION_1_6;
}
//初始化输入格式上下文
//init player
int init_input_format_context(MediaPlayer* player, const char* file_name){
//注册所有组件
//register all modules
av_register_all();
//分配上下文
//alloc format context
player->format_context = avformat_alloc_context();
//打开视频文件
//open the input file
if(avformat_open_input(&player->format_context, file_name, NULL, NULL)!=0) {
LOGE(TAG, "Couldn't open file:%s\n", file_name);
return -1;
}
//检索多媒体流信息
//find the info of all streams
if(avformat_find_stream_info(player->format_context, NULL)<0) {
LOGE(TAG, "Couldn't find stream information.");
return -1;
}
//寻找音视频流索引位置
//find the index of audio and video stream
int i;
player->video_stream_index = -1;
player->audio_stream_index = -1;
@ -114,11 +114,11 @@ int init_input_format_context(MediaPlayer* player, const char* file_name){
return 0;
}
//打开音视频解码器
//open decoder
int init_condec_context(MediaPlayer* player){
//获取codec上下文指针
//get codec context
player->video_codec_context = player->format_context->streams[player->video_stream_index]->codec;
//寻找视频流的解码器
//find audio and video decoder
player->video_codec = avcodec_find_decoder(player->video_codec_context->codec_id);
if(player->video_codec == NULL) {
LOGE(TAG, "couldn't find video Codec.");
@ -138,25 +138,24 @@ int init_condec_context(MediaPlayer* player){
LOGE(TAG, "Couldn't open audio codec.");
return -1;
}
// 获取视频宽高
// width and height
player->video_width = player->video_codec_context->width;
player->video_height = player->video_codec_context->height;
return 0;
}
//视频解码
void video_player_prepare(MediaPlayer* player, JNIEnv* env, jobject surface){
// 获取native window
// get native window
player->native_window = ANativeWindow_fromSurface(env, surface);
}
//获取当前播放时间
//get current playing time
int64_t get_play_time(MediaPlayer* player){
return (int64_t)(av_gettime() - player->start_time);
}
/**
* 延迟等待，音视频同步
* audio and video synchronization
*/
void player_wait_for_frame(MediaPlayer *player, int64_t stream_time) {
pthread_mutex_lock(&player->mutex);
@ -180,7 +179,7 @@ void player_wait_for_frame(MediaPlayer *player, int64_t stream_time) {
// and check everything again
sleep_time = 500000ll;
}
//TODO:等待指定时长
//TODO: waiting util time out
// pthread_cond_timeout_np(&player->cond, &player->mutex,
// (unsigned int) (sleep_time / 1000ll));
gettimeofday(&now, NULL);
@ -191,14 +190,12 @@ void player_wait_for_frame(MediaPlayer *player, int64_t stream_time) {
pthread_mutex_unlock(&player->mutex);
}
//视频解码
//decode video packet as a frame
int decode_video(MediaPlayer* player, AVPacket* packet){
// 设置native window的buffer大小,可自动拉伸
ANativeWindow_setBuffersGeometry(player->native_window, player->video_width,
player->video_height, WINDOW_FORMAT_RGBA_8888);
ANativeWindow_Buffer windowBuffer;
//申请内存
player->yuv_frame = av_frame_alloc();
player->rgba_frame = av_frame_alloc();
if(player->rgba_frame == NULL || player->yuv_frame == NULL) {
@ -206,14 +203,13 @@ int decode_video(MediaPlayer* player, AVPacket* packet){
return -1;
}
// buffer中数据用于渲染,且格式为RGBA
// get buffer size, the format is RGBA
int numBytes=av_image_get_buffer_size(AV_PIX_FMT_RGBA, player->video_width, player->video_height, 1);
player->buffer = (uint8_t *)av_malloc(numBytes*sizeof(uint8_t));
av_image_fill_arrays(player->rgba_frame->data, player->rgba_frame->linesize, player->buffer, AV_PIX_FMT_RGBA,
player->video_width, player->video_height, 1);
// 由于解码出来的帧格式不是RGBA的,在渲染之前需要进行格式转换
struct SwsContext *sws_ctx = sws_getContext(
player->video_width,
player->video_height,
@ -227,7 +223,7 @@ int decode_video(MediaPlayer* player, AVPacket* packet){
NULL);
int frameFinished;
//对该帧进行解码
//decode video frame
int ret = avcodec_decode_video2(player->video_codec_context, player->yuv_frame, &frameFinished, packet);
if(ret < 0){
LOGE(TAG, "avcodec_decode_video2 error...");
@ -236,27 +232,26 @@ int decode_video(MediaPlayer* player, AVPacket* packet){
if (frameFinished) {
// lock native window
ANativeWindow_lock(player->native_window, &windowBuffer, 0);
// 格式转换
// yuv to rgba
sws_scale(sws_ctx, (uint8_t const * const *)player->yuv_frame->data,
player->yuv_frame->linesize, 0, player->video_height,
player->rgba_frame->data, player->rgba_frame->linesize);
// 获取stride
uint8_t * dst = windowBuffer.bits;
int dstStride = windowBuffer.stride * 4;
uint8_t * src = player->rgba_frame->data[0];
int srcStride = player->rgba_frame->linesize[0];
// 由于window的stride和帧的stride不同,因此需要逐行复制
// copy data to the target buffer
int h;
for (h = 0; h < player->video_height; h++) {
memcpy(dst + h * dstStride, src + h * srcStride, (size_t) srcStride);
}
//计算延迟
//calculate pts
int64_t pts = av_frame_get_best_effort_timestamp(player->yuv_frame);
AVStream *stream = player->format_context->streams[player->video_stream_index];
//转换（不同时间基时间转换）
//convert to real time
int64_t time = av_rescale_q(pts, stream->time_base, AV_TIME_BASE_Q);
//音视频帧同步
//synchronize
player_wait_for_frame(player, time);
ANativeWindow_unlockAndPost(player->native_window);
@ -264,21 +259,21 @@ int decode_video(MediaPlayer* player, AVPacket* packet){
return 0;
}
//音频解码初始化
//init audio decoder
void audio_decoder_prepare(MediaPlayer* player) {
player->swrContext = swr_alloc();
//输入的采样格式
//input format
enum AVSampleFormat in_sample_fmt = player->audio_codec_context->sample_fmt;
//输出采样格式16bit PCM
//output format
player->out_sample_fmt = AV_SAMPLE_FMT_S16;
//输入采样率
//input sampleRate
int in_sample_rate = player->audio_codec_context->sample_rate;
//输出采样率
//output sampleRate
player->out_sample_rate = in_sample_rate;
//声道布局（2个声道，默认立体声stereo）
//channel layout (stereo by default)
uint64_t in_ch_layout = player->audio_codec_context->channel_layout;
//输出的声道布局（立体声）
//output channel layout
uint64_t out_ch_layout = AV_CH_LAYOUT_STEREO;
swr_alloc_set_opts(player->swrContext,
@ -286,17 +281,15 @@ void audio_decoder_prepare(MediaPlayer* player) {
in_ch_layout, in_sample_fmt, in_sample_rate,
0, NULL);
swr_init(player->swrContext);
//输出的声道个数
player->out_channel_nb = av_get_channel_layout_nb_channels(out_ch_layout);
}
//音频播放器
void audio_player_prepare(MediaPlayer* player, JNIEnv* env, jclass jthiz){
jclass player_class = (*env)->GetObjectClass(env,jthiz);
if(!player_class){
LOGE(TAG, "player_class not found...");
}
//AudioTrack对象
//get AudioTrack by reflection
jmethodID audio_track_method = (*env)->GetMethodID(
env,player_class,"createAudioTrack","(II)Landroid/media/AudioTrack;");
if(!audio_track_method){
@ -305,38 +298,41 @@ void audio_player_prepare(MediaPlayer* player, JNIEnv* env, jclass jthiz){
jobject audio_track = (*env)->CallObjectMethod(
env,jthiz,audio_track_method, player->out_sample_rate, player->out_channel_nb);
//调用play方法
jclass audio_track_class = (*env)->GetObjectClass(env, audio_track);
jmethodID audio_track_play_mid = (*env)->GetMethodID(env,audio_track_class,"play","()V");
(*env)->CallVoidMethod(env, audio_track, audio_track_play_mid);
player->audio_track = (*env)->NewGlobalRef(env, audio_track);
//获取write()方法
player->audio_track_write_mid = (*env)->GetMethodID(env,audio_track_class,"write","([BII)I");
//16bit 44100 PCM 数据
//malloc buffer
player->audio_buffer = (uint8_t *)av_malloc(MAX_AUDIO_FRAME_SIZE);
//解压缩数据
player->audio_frame = av_frame_alloc();
}
//音频解码
//audio decode function
int decode_audio(MediaPlayer* player, AVPacket* packet){
int got_frame = 0, ret;
//解码
ret = avcodec_decode_audio4(player->audio_codec_context, player->audio_frame, &got_frame, packet);
if(ret < 0){
LOGE(TAG, "avcodec_decode_audio4 error...");
return -1;
}
//解码一帧成功
//decode success
if(got_frame > 0){
//音频格式转换
swr_convert(player->swrContext, &player->audio_buffer, MAX_AUDIO_FRAME_SIZE, (const uint8_t **)player->audio_frame->data, player->audio_frame->nb_samples);
int out_buffer_size = av_samples_get_buffer_size(NULL, player->out_channel_nb,
player->audio_frame->nb_samples, player->out_sample_fmt, 1);
//音视频帧同步
//convert audio format
swr_convert(player->swrContext,
&player->audio_buffer,
MAX_AUDIO_FRAME_SIZE,
(const uint8_t **)player->audio_frame->data,
player->audio_frame->nb_samples);
int out_buffer_size = av_samples_get_buffer_size(NULL,
player->out_channel_nb,
player->audio_frame->nb_samples,
player->out_sample_fmt,
1);
//synchronize
int64_t pts = packet->pts;
if (pts != AV_NOPTS_VALUE) {
AVStream *stream = player->format_context->streams[player->audio_stream_index];
@ -349,14 +345,12 @@ int decode_audio(MediaPlayer* player, AVPacket* packet){
(*javaVM)->AttachCurrentThread(javaVM, &env, NULL);
jbyteArray audio_sample_array = (*env)->NewByteArray(env,out_buffer_size);
jbyte* sample_byte_array = (*env)->GetByteArrayElements(env,audio_sample_array,NULL);
//拷贝缓冲数据
memcpy(sample_byte_array, player->audio_buffer, (size_t) out_buffer_size);
//释放数组
(*env)->ReleaseByteArrayElements(env,audio_sample_array,sample_byte_array,0);
//调用AudioTrack的write方法进行播放
//call write method of AudioTrack to play
(*env)->CallIntMethod(env, player->audio_track, player->audio_track_write_mid,
audio_sample_array,0,out_buffer_size);
//释放局部引用
//release local reference
(*env)->DeleteLocalRef(env,audio_sample_array);
}
}
@ -366,7 +360,6 @@ int decode_audio(MediaPlayer* player, AVPacket* packet){
return 0;
}
//初始化队列
void init_queue(MediaPlayer* player, int size){
int i;
for (i = 0; i < 2; ++i) {
@ -375,7 +368,6 @@ void init_queue(MediaPlayer* player, int size){
}
}
//释放队列
void delete_queue(MediaPlayer* player){
int i;
for (i = 0; i < 2; ++i) {
@ -383,7 +375,7 @@ void delete_queue(MediaPlayer* player){
}
}
//读取AVPacket线程(生产者)
//the thread of write packet
void* write_packet_to_queue(void* arg){
MediaPlayer* player = (MediaPlayer*)arg;
AVPacket packet, *pkt = &packet;
@ -394,23 +386,20 @@ void* write_packet_to_queue(void* arg){
break;
}
if(pkt->stream_index == player->video_stream_index || pkt->stream_index == player->audio_stream_index){
//根据AVPacket->stream_index获取对应的队列
AVPacketQueue *queue = player->packets[pkt->stream_index];
pthread_mutex_lock(&player->mutex);
AVPacket* data = queue_push(queue, &player->mutex, &player->cond);
pthread_mutex_unlock(&player->mutex);
//拷贝（间接赋值，拷贝结构体数据）
*data = packet;
}
}
}
//音视频解码线程(消费者)
//the thread of decoding
void* decode_func(void* arg){
Decoder *decoder_data = (Decoder*)arg;
MediaPlayer *player = decoder_data->player;
int stream_index = decoder_data->stream_index;
//根据stream_index获取对应的AVPacket队列
AVPacketQueue *queue = player->packets[stream_index];
int ret = 0;
@ -419,9 +408,9 @@ void* decode_func(void* arg){
AVPacket *packet = (AVPacket*)queue_pop(queue, &player->mutex, &player->cond);
pthread_mutex_unlock(&player->mutex);
if(stream_index == player->video_stream_index) {//视频流
if(stream_index == player->video_stream_index) {//video stream
ret = decode_video(player, packet);
} else if(stream_index == player->audio_stream_index) {//音频流
} else if(stream_index == player->audio_stream_index) {//audio stream
ret = decode_audio(player, packet);
}
av_packet_unref(packet);
@ -439,23 +428,21 @@ MEDIA_PLAYER_FUNC(jint, setup, jstring filePath, jobject surface){
if(player == NULL){
return -1;
}
//初始化输入格式上下文
ret = init_input_format_context(player, file_name);
if(ret < 0){
return ret;
}
//初始化音视频解码器
ret = init_condec_context(player);
if(ret < 0){
return ret;
}
//初始化视频surface
//init surface
video_player_prepare( player, env, surface);
//初始化音频相关参数
//init params of player
audio_decoder_prepare(player);
//初始化音频播放器
//init player
audio_player_prepare(player, env, thiz);
//初始化音视频packet队列
//init queue
init_queue(player, PACKET_SIZE);
return 0;
@ -465,12 +452,10 @@ MEDIA_PLAYER_FUNC(jint, play){
pthread_mutex_init(&player->mutex, NULL);
pthread_cond_init(&player->cond, NULL);
//生产者线程
pthread_create(&player->write_thread, NULL, write_packet_to_queue, (void*)player);
sleep(1);
player->start_time = 0;
//消费者线程
Decoder data1 = {player, player->video_stream_index}, *decoder_data1 = &data1;
pthread_create(&player->video_thread, NULL, decode_func, (void*)decoder_data1);
@ -486,7 +471,6 @@ MEDIA_PLAYER_FUNC(jint, play){
}
MEDIA_PLAYER_FUNC(void, release){
//释放内存以及关闭文件
free(player->audio_track);
free(player->audio_track_write_mid);
av_free(player->buffer);

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