android ffmpeg+OpenGL播放yuv+openSL 快放 慢放 視訊播放器
阿新 • • 發佈:2019-01-22
這裡是完整的音視訊播放器,功能如下(這裡有iOS版的):
視訊是通過opengl 播放yuv資料,音訊是opensl播放。
app執行流程如下圖:
紅色虛線內的是一個執行緒的執行,總共涉及到四個執行緒。
java層幾乎沒有播放器的內容,ffmpeg,opengl,opensl都是在c++層執行,所以可以原封不動的遷移到其他平臺,如ios,不過c/c++程式碼ios程式設計師看起來不太友好,有ios版的,ios版的有yuv->RGB->image的方法,有ffmpeg解碼播放流程圖,解碼播放流程一目瞭然。
看一下app表現,小米6播放每分鐘100M等級的視訊:
可以看到cpu使用在10%左右,很省電了有沒有100M每分鐘,一部電影是十幾G的清晰度。
再看常規清晰度720p:
cpu消耗只有3%左右,這也就是直播清晰度了,這cpu消耗還能說什麼。
看記憶體優化:
整個播放過程native層記憶體佔用都在15M左右波動,Graphics佔用記憶體也沒變化,播放過程中記憶體釋放很到位,沒有記憶體增長。大家可以自行測試。
這裡給大家看下ffmpeg解碼程式碼:
FFmpeg.h
//
// Created by huizai on 2017/11/22.
//
#ifndef FFMPEG_DEMO_FFMPEGDECODER_H
#define FFMPEG_DEMO_FFMPEGDECODER_H
#include "JniDefine.h"
#include "YUV_GL_DATA.h"
extern "C" {
//編碼
#include "libavcodec/avcodec.h"
//封裝格式處理
#include "libavformat/avformat.h"
//畫素處理
#include "libswscale/swscale.h"
#include "libswresample/swresample.h"
}
//定義音訊重取樣後的引數
#define SAMPLE_SIZE 16
#define SAMPLE_RATE 44100
#define CHANNEL 2
typedef struct FFmpeg{
int totleMs;
//音訊播放時間
int aFps;
//視訊播放時間
int vFps;
//視訊流索引
int videoStreamIndex;
int audioStreamIndex;
int sampleRate;
int sampleSize;
int channel;
//音訊貞資料的長度
int pcmDataLength;
AVFormatContext * pFormatCtx;
AVCodecContext * pVideoCodecCtx;
AVCodecContext * pAudioCodecCtx;
AVFrame * pYuv;
AVFrame * pPcm;
AVCodec * pVideoCodec; //視訊解碼器
AVCodec * pAudioCodec; //音訊解碼器
struct SwsContext * pSwsCtx;
SwrContext * pSwrCtx;
const char * url;
AVPacket pkt;
char * audioData;
H264YUV_Frame yuvFrame;
}Decoder;
int OpenAndInitDecoder(Decoder * decoder);
int Read(Decoder * decoder);
int Decode(Decoder * decoder,AVPacket packet);
int YuvToGLData(Decoder *decoder);
int ToPcm(Decoder * decoder,AACFrame * frame);
void printError(const char* flag,int ret);
double r2d(AVRational r);
#endif //FFMPEG_DEMO_FFMPEGDECODER_H
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
FFmpeg.cpp
//
// Created by huizai on 2017/11/22.
//
#include "FFmpeg.h"
int OpenAndInitDecoder(Decoder * decoder){
//1.註冊所有元件
av_register_all();
avformat_network_init();
//2.開啟輸入視訊檔案
//封裝格式上下文,統領全域性的結構體,儲存了視訊檔案封裝格式的相關資訊
decoder->pFormatCtx = avformat_alloc_context();
int ret = avformat_open_input(&decoder->pFormatCtx, decoder->url, NULL, NULL);
if (ret != 0) {
return ret;
} else{
FFLOGI("視訊長度:%d",decoder->pFormatCtx->duration);
}
decoder->totleMs = (int)(decoder->pFormatCtx->duration/AV_TIME_BASE)*1000;
avformat_find_stream_info(decoder->pFormatCtx, NULL);
//分別找到音訊視訊解碼器並開啟解碼器
for (int i = 0; i < decoder->pFormatCtx->nb_streams; i++) {
AVStream *stream = decoder->pFormatCtx->streams[i];
AVCodec * codec = avcodec_find_decoder(stream->codecpar->codec_id);
AVCodecContext * codecCtx = avcodec_alloc_context3(codec);
avcodec_parameters_to_context(codecCtx, stream->codecpar);
if (codecCtx->codec_type == AVMEDIA_TYPE_VIDEO) {
printf("video\n");
decoder->videoStreamIndex = i;
decoder->pVideoCodec = codec;
decoder->pVideoCodecCtx = codecCtx;
int err = avcodec_open2(decoder->pVideoCodecCtx, decoder->pVideoCodec, NULL);
if (err != 0) {
char buf[1024] = {0};
av_strerror(err, buf, sizeof(buf));
printf("open videoCodec error:%s", buf);
return false;
}
}
if (codecCtx->codec_type == AVMEDIA_TYPE_AUDIO) {
printf("audio\n");
decoder->audioStreamIndex = i;
decoder->pAudioCodec = codec;
decoder->pAudioCodecCtx = codecCtx;
int err = avcodec_open2(decoder->pAudioCodecCtx, decoder->pAudioCodec, NULL);
if (err != 0) {
char buf[1024] = {0};
av_strerror(err, buf, sizeof(buf));
printf("open audionCodec error:%s", buf);
return false;
}
if (codecCtx->sample_rate != SAMPLE_RATE) {
decoder->sampleRate = codecCtx->sample_rate;
}
}
}
decoder ->pYuv = av_frame_alloc();
decoder ->pPcm = av_frame_alloc();
decoder ->channel = CHANNEL;
decoder ->sampleSize = SAMPLE_SIZE;
decoder ->sampleRate = decoder->pAudioCodecCtx->sample_rate;
// printf("open acodec success! sampleRate:%d channel:%d sampleSize:%d fmt:%d\n",
// decoder->sampleRate,decoder->channel,decoder->sampleSize,decoder->pAudioCodecCtx->sample_fmt);
FFLOGI("open acodec success! sampleRate:%d channel:%d fmt:%d\n",
decoder->pAudioCodecCtx->sample_rate,decoder->pAudioCodecCtx->channels,decoder->pAudioCodecCtx->sample_fmt);
return ret;
}
int Read(Decoder * decoder){
//這裡先不加執行緒鎖,在啟動多執行緒的地方統一加鎖
// AVPacket * pkt = malloc(sizeof(AVPacket));
if (!decoder->pFormatCtx) {
return -1;
}
int err = av_read_frame(decoder->pFormatCtx,&decoder->pkt);
if (err != 0) {
printError("av_read_pkt_error:",err);
if (err == -541478725){
//讀取檔案結束
return -9;
}
return -2;
}
return 0;
}
int Decode(Decoder* decoder,AVPacket packet){
if (!decoder->pFormatCtx) {
return -1;
}
//分配AVFream 空間
if (decoder->pYuv == NULL) {
decoder->pYuv = av_frame_alloc();
}
if (decoder->pPcm == NULL) {
decoder->pPcm = av_frame_alloc();
}
AVCodecContext * pCodecCtx;
AVFrame * tempFrame;
if (packet.stream_index == decoder->videoStreamIndex) {
pCodecCtx = decoder->pVideoCodecCtx;
tempFrame = decoder->pYuv;
}else if (packet.stream_index == decoder->audioStreamIndex){
pCodecCtx = decoder->pAudioCodecCtx;
tempFrame = decoder->pPcm;
}else{
return -1;
}
if (!pCodecCtx) {
return -1;
}
int re = avcodec_send_packet(pCodecCtx,&packet);
if (re != 0) {
char errorBuf[1024] = {0};
av_make_error_string(errorBuf,1024,re);
FFLOGE("send pkt error:%s",errorBuf);
return -1;
}
re = avcodec_receive_frame(pCodecCtx, tempFrame);
if (re != 0) {
char errorBuf[1024] = {0};
av_make_error_string(errorBuf,1024,re);
FFLOGE("receive av_data error:%s",errorBuf);
return -1;
}
if (packet.stream_index == decoder->videoStreamIndex) {
decoder->vFps = (int)((packet.pts * r2d(decoder->pFormatCtx->streams[decoder->videoStreamIndex]->time_base))*1000);
}else if (packet.stream_index == decoder->audioStreamIndex){
decoder->aFps = (int)((packet.pts * r2d(decoder->pFormatCtx->streams[decoder->audioStreamIndex]->time_base))*1000);
}
FFLOGI("[D]");
return 0;
}
int Min(int a,int b){
return a>b?b:a;
}
void copyDecodedFrame(unsigned char *src, unsigned char *dist,int linesize, int width, int height)
{
width = Min(linesize, width);
if (sizeof(dist) == 0) {
return;
}
for (int i = 0; i < height; ++i) {
memcpy(dist, src, width);
dist += width;
src += linesize;
}
}
int YuvToGLData(Decoder *decoder){
if (!decoder->pFormatCtx || !decoder->pYuv ||decoder-> pYuv->linesize[0] <= 0) {
return -1;
}
//把資料重新封裝成opengl需要的格式
unsigned int lumaLength= (unsigned int)(decoder->pYuv->height)*(Min(decoder->pYuv->linesize[0], decoder->pYuv->width));
unsigned int chromBLength=(unsigned int)((decoder->pYuv->height)/2)*(Min(decoder->pYuv->linesize[1], (decoder->pYuv->width)/2));
unsigned int chromRLength=(unsigned int)((decoder->pYuv->height)/2)*(Min(decoder->pYuv->linesize[2], (decoder->pYuv->width)/2));
decoder->yuvFrame.luma.dataBuffer = (unsigned char*)malloc(lumaLength);
decoder->yuvFrame.chromaB.dataBuffer = (unsigned char*)malloc(chromBLength);
decoder->yuvFrame.chromaR.dataBuffer = (unsigned char*)malloc(chromRLength);
decoder->yuvFrame.width=(unsigned int)decoder->pYuv->width;
decoder->yuvFrame.height=(unsigned int)decoder->pYuv->height;
if (decoder->pYuv->height <= 0) {
free(decoder->yuvFrame.luma.dataBuffer);
free(decoder->yuvFrame.chromaB.dataBuffer);
free(decoder->yuvFrame.chromaR.dataBuffer);
return -1;
}
copyDecodedFrame(decoder->pYuv->data[0],decoder->yuvFrame.luma.dataBuffer,decoder->pYuv->linesize[0],
decoder->pYuv->width,decoder->pYuv->height);
copyDecodedFrame(decoder->pYuv->data[1], decoder->yuvFrame.chromaB.dataBuffer,decoder->pYuv->linesize[1],
decoder->pYuv->width / 2,decoder->pYuv->height / 2);
copyDecodedFrame(decoder->pYuv->data[2], decoder->yuvFrame.chromaR.dataBuffer,decoder->pYuv->linesize[2],
decoder->pYuv->width / 2,decoder->pYuv->height / 2);
return 0;
}
int ToPcm(Decoder * decoder,AACFrame * frame){
if (!decoder->pFormatCtx || !decoder->pPcm) {
return -1;
}
// printf("sample_rate:%d,channels:%d,sample_fmt:%d,channel_layout:%llu,nb_samples:%d\n",pAudioCodecCtx->sample_rate,pAudioCodecCtx->channels,pAudioCodecCtx->sample_fmt,pAudioCodecCtx->channel_layout,pPcm->nb_samples);
//音訊重取樣
if (decoder->pSwrCtx == NULL) {
decoder->pSwrCtx = swr_alloc();
swr_alloc_set_opts(decoder->pSwrCtx,
AV_CH_LAYOUT_STEREO,//2聲道立體聲
AV_SAMPLE_FMT_S16, //取樣大小 16位
decoder->sampleRate,
decoder->pAudioCodecCtx->channel_layout,
decoder->pAudioCodecCtx->sample_fmt,// 樣本型別
decoder->pAudioCodecCtx->sample_rate,
0, 0);
int ret = swr_init(decoder->pSwrCtx);
char errorBuf[1024] = {0};
av_make_error_string(errorBuf,1024,ret);
FFLOGE("swr_init error:%s",errorBuf);
}
uint8_t * tempData[1];
tempData[0] = (uint8_t*)frame->dataBuffer;
int len = swr_convert(decoder->pSwrCtx, tempData, 10000, (const uint8_t**)decoder->pPcm->data,decoder->pPcm->nb_samples);
if (len < 0) {
char errbuf[1024] = {0};
FFLOGE("swr_convert error:%d",len);
return 0;
}
int outSize = av_samples_get_buffer_size(NULL,
CHANNEL,
len,
AV_SAMPLE_FMT_S16,0);
frame->length = (unsigned int)outSize;
FFLOGI("nb_smples:%d,des_smples:%d,outSize:%d",decoder->pPcm->nb_samples,len,outSize);
return 0;
}
void printError(const char * flag,int ret){
char errorbuf[1024] = {0};
av_make_error_string(errorbuf, 1024, ret);
FFLOGE("%s,ret:%d,%s", flag, ret, errorbuf);
}
double r2d(AVRational r){
return r.num == 0 || r.den == 0 ? 0.:(double)r.num/(double)r.den;
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
- 74
- 75
- 76
- 77
- 78
- 79
- 80
- 81
- 82
- 83
- 84
- 85
- 86
- 87
- 88
- 89
- 90
- 91
- 92
- 93
- 94
- 95
- 96
- 97
- 98
- 99
- 100
- 101
- 102
- 103
- 104
- 105
- 106
- 107
- 108
- 109
- 110
- 111
- 112
- 113
- 114
- 115
- 116
- 117
- 118
- 119
- 120
- 121
- 122
- 123
- 124
- 125
- 126
- 127
- 128
- 129
- 130
- 131
- 132
- 133
- 134
- 135
- 136
- 137
- 138
- 139
- 140
- 141
- 142
- 143
- 144
- 145
- 146
- 147
- 148
- 149
- 150
- 151
- 152
- 153
- 154
- 155
- 156
- 157
- 158
- 159
- 160
- 161
- 162
- 163
- 164
- 165
- 166
- 167
- 168
- 169
- 170
- 171
- 172
- 173
- 174
- 175
- 176
- 177
- 178
- 179
- 180
- 181
- 182
- 183
- 184
- 185
- 186
- 187
- 188
- 189
- 190
- 191
- 192
- 193
- 194
- 195
- 196
- 197
- 198
- 199
- 200
- 201
- 202
- 203
- 204
- 205
- 206
- 207
- 208
- 209
- 210
- 211
- 212
- 213
- 214
- 215
- 216
- 217
- 218
- 219
- 220
- 221
- 222
- 223
- 224
- 225
- 226
- 227
- 228
- 229
可以跟iOS版的對比一下,根本沒區別,都是一樣的,要不怎麼說跨平臺技術呢。程式碼說明可以去看ios版的有簡單說明。也可以下載原始碼debug進行了解。
說明一點,想要做優化的,就是我這裡執行緒鎖加的很粗糙,這樣會造成不同執行緒對資源的等待,會有點點不流暢,應該精細到每一句就好了,自己去調吧。