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refine ffmepg and encoder, extract ffmpeg.

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winlin 2014-04-07 09:34:36 +08:00
parent 095364a72b
commit 72c330d47c
6 changed files with 593 additions and 509 deletions
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3
trunk/configure vendored
View file

@ -435,7 +435,8 @@ MODULE_FILES=("srs_app_server" "srs_app_conn" "srs_app_rtmp_conn" "srs_app_socke
"srs_app_codec" "srs_app_refer" "srs_app_hls" "srs_app_forward" "srs_app_encoder"
"srs_app_http" "srs_app_thread" "srs_app_bandwidth" "srs_app_st" "srs_app_log"
"srs_app_config" "srs_app_pithy_print" "srs_app_reload" "srs_app_http_api"
"srs_app_http_conn" "srs_app_http_hooks" "srs_app_json" "srs_app_ingest")
"srs_app_http_conn" "srs_app_http_hooks" "srs_app_json" "srs_app_ingest"
"srs_app_ffmpeg")
APP_INCS="src/app"; MODULE_DIR=${APP_INCS} . auto/modules.sh
APP_OBJS="${MODULE_OBJS[@]}"
#

468
trunk/src/app/srs_app_encoder.cpp
View file

@ -23,485 +23,19 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#include <srs_app_encoder.hpp>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/types.h>
#include <algorithm>
#include <srs_kernel_error.hpp>
#include <srs_kernel_log.hpp>
#include <srs_app_config.hpp>
#include <srs_protocol_rtmp.hpp>
#include <srs_app_pithy_print.hpp>
#include <srs_protocol_rtmp_stack.hpp>
#include <srs_app_ffmpeg.hpp>
#ifdef SRS_TRANSCODE
#define SRS_ENCODER_COPY "copy"
#define SRS_ENCODER_NO_VIDEO "vn"
#define SRS_ENCODER_NO_AUDIO "an"
// only support libx264 encoder.
#define SRS_ENCODER_VCODEC "libx264"
// any aac encoder is ok which contains the aac,
// for example, libaacplus, aac, fdkaac
#define SRS_ENCODER_ACODEC "aac"
// when error, encoder sleep for a while and retry.
#define SRS_ENCODER_SLEEP_US (int64_t)(3*1000*1000LL)
// for encoder to detect the dead loop
static std::vector<std::string> _transcoded_url;
SrsFFMPEG::SrsFFMPEG(std::string ffmpeg_bin)
{
started = false;
pid = -1;
ffmpeg = ffmpeg_bin;
vbitrate = 0;
vfps = 0;
vwidth = 0;
vheight = 0;
vthreads = 0;
abitrate = 0;
asample_rate = 0;
achannels = 0;
log_fd = -1;
}
SrsFFMPEG::~SrsFFMPEG()
{
stop();
}
int SrsFFMPEG::initialize(SrsRequest* req, SrsConfDirective* engine)
{
int ret = ERROR_SUCCESS;
_srs_config->get_engine_vfilter(engine, vfilter);
vcodec = _srs_config->get_engine_vcodec(engine);
vbitrate = _srs_config->get_engine_vbitrate(engine);
vfps = _srs_config->get_engine_vfps(engine);
vwidth = _srs_config->get_engine_vwidth(engine);
vheight = _srs_config->get_engine_vheight(engine);
vthreads = _srs_config->get_engine_vthreads(engine);
vprofile = _srs_config->get_engine_vprofile(engine);
vpreset = _srs_config->get_engine_vpreset(engine);
_srs_config->get_engine_vparams(engine, vparams);
acodec = _srs_config->get_engine_acodec(engine);
abitrate = _srs_config->get_engine_abitrate(engine);
asample_rate = _srs_config->get_engine_asample_rate(engine);
achannels = _srs_config->get_engine_achannels(engine);
_srs_config->get_engine_aparams(engine, aparams);
output = _srs_config->get_engine_output(engine);
// ensure the size is even.
vwidth -= vwidth % 2;
vheight -= vheight % 2;
// input stream, from local.
// ie. rtmp://127.0.0.1:1935/live/livestream
input = "rtmp://127.0.0.1:";
input += req->port;
input += "/";
input += req->app;
input += "?vhost=";
input += req->vhost;
input += "/";
input += req->stream;
// output stream, to other/self server
// ie. rtmp://127.0.0.1:1935/live/livestream_sd
output = srs_string_replace(output, "[vhost]", req->vhost);
output = srs_string_replace(output, "[port]", req->port);
output = srs_string_replace(output, "[app]", req->app);
output = srs_string_replace(output, "[stream]", req->stream);
output = srs_string_replace(output, "[engine]", engine->arg0());
// write ffmpeg info to log file.
log_file = _srs_config->get_ffmpeg_log_dir();
log_file += "/";
log_file += "encoder";
log_file += "-";
log_file += req->vhost;
log_file += "-";
log_file += req->app;
log_file += "-";
log_file += req->stream;
log_file += ".log";
// important: loop check, donot transcode again.
std::vector<std::string>::iterator it;
it = std::find(_transcoded_url.begin(), _transcoded_url.end(), input);
if (it != _transcoded_url.end()) {
ret = ERROR_ENCODER_LOOP;
srs_info("detect a loop cycle, input=%s, output=%s, ignore it. ret=%d",
input.c_str(), output.c_str(), ret);
return ret;
}
_transcoded_url.push_back(output);
if (vcodec == SRS_ENCODER_NO_VIDEO && acodec == SRS_ENCODER_NO_AUDIO) {
ret = ERROR_ENCODER_VCODEC;
srs_warn("video and audio disabled. ret=%d", ret);
return ret;
}
if (vcodec != SRS_ENCODER_COPY && vcodec != SRS_ENCODER_NO_VIDEO) {
if (vcodec != SRS_ENCODER_VCODEC) {
ret = ERROR_ENCODER_VCODEC;
srs_error("invalid vcodec, must be %s, actual %s, ret=%d",
SRS_ENCODER_VCODEC, vcodec.c_str(), ret);
return ret;
}
if (vbitrate <= 0) {
ret = ERROR_ENCODER_VBITRATE;
srs_error("invalid vbitrate: %d, ret=%d", vbitrate, ret);
return ret;
}
if (vfps <= 0) {
ret = ERROR_ENCODER_VFPS;
srs_error("invalid vfps: %.2f, ret=%d", vfps, ret);
return ret;
}
if (vwidth <= 0) {
ret = ERROR_ENCODER_VWIDTH;
srs_error("invalid vwidth: %d, ret=%d", vwidth, ret);
return ret;
}
if (vheight <= 0) {
ret = ERROR_ENCODER_VHEIGHT;
srs_error("invalid vheight: %d, ret=%d", vheight, ret);
return ret;
}
if (vthreads < 0) {
ret = ERROR_ENCODER_VTHREADS;
srs_error("invalid vthreads: %d, ret=%d", vthreads, ret);
return ret;
}
if (vprofile.empty()) {
ret = ERROR_ENCODER_VPROFILE;
srs_error("invalid vprofile: %s, ret=%d", vprofile.c_str(), ret);
return ret;
}
if (vpreset.empty()) {
ret = ERROR_ENCODER_VPRESET;
srs_error("invalid vpreset: %s, ret=%d", vpreset.c_str(), ret);
return ret;
}
}
if (acodec != SRS_ENCODER_COPY && acodec != SRS_ENCODER_NO_AUDIO) {
if (acodec.find(SRS_ENCODER_ACODEC) == std::string::npos) {
ret = ERROR_ENCODER_ACODEC;
srs_error("invalid acodec, must be %s, actual %s, ret=%d",
SRS_ENCODER_ACODEC, acodec.c_str(), ret);
return ret;
}
if (abitrate <= 0) {
ret = ERROR_ENCODER_ABITRATE;
srs_error("invalid abitrate: %d, ret=%d",
abitrate, ret);
return ret;
}
if (asample_rate <= 0) {
ret = ERROR_ENCODER_ASAMPLE_RATE;
srs_error("invalid sample rate: %d, ret=%d",
asample_rate, ret);
return ret;
}
if (achannels != 1 && achannels != 2) {
ret = ERROR_ENCODER_ACHANNELS;
srs_error("invalid achannels, must be 1 or 2, actual %d, ret=%d",
achannels, ret);
return ret;
}
}
if (output.empty()) {
ret = ERROR_ENCODER_OUTPUT;
srs_error("invalid empty output, ret=%d", ret);
return ret;
}
return ret;
}
int SrsFFMPEG::start()
{
int ret = ERROR_SUCCESS;
if (started) {
return ret;
}
// prepare exec params
char tmp[256];
std::vector<std::string> params;
// argv[0], set to ffmpeg bin.
// The execv() and execvp() functions ....
// The first argument, by convention, should point to
// the filename associated with the file being executed.
params.push_back(ffmpeg);
// input.
params.push_back("-f");
params.push_back("flv");
params.push_back("-i");
params.push_back(input);
// build the filter
if (!vfilter.empty()) {
std::vector<std::string>::iterator it;
for (it = vfilter.begin(); it != vfilter.end(); ++it) {
std::string p = *it;
if (!p.empty()) {
params.push_back(p);
}
}
}
// video specified.
if (vcodec != SRS_ENCODER_NO_VIDEO) {
params.push_back("-vcodec");
params.push_back(vcodec);
} else {
params.push_back("-vn");
}
// the codec params is disabled when copy
if (vcodec != SRS_ENCODER_COPY && vcodec != SRS_ENCODER_NO_VIDEO) {
params.push_back("-b:v");
snprintf(tmp, sizeof(tmp), "%d", vbitrate * 1000);
params.push_back(tmp);
params.push_back("-r");
snprintf(tmp, sizeof(tmp), "%.2f", vfps);
params.push_back(tmp);
params.push_back("-s");
snprintf(tmp, sizeof(tmp), "%dx%d", vwidth, vheight);
params.push_back(tmp);
// TODO: add aspect if needed.
params.push_back("-aspect");
snprintf(tmp, sizeof(tmp), "%d:%d", vwidth, vheight);
params.push_back(tmp);
params.push_back("-threads");
snprintf(tmp, sizeof(tmp), "%d", vthreads);
params.push_back(tmp);
params.push_back("-profile:v");
params.push_back(vprofile);
params.push_back("-preset");
params.push_back(vpreset);
// vparams
if (!vparams.empty()) {
std::vector<std::string>::iterator it;
for (it = vparams.begin(); it != vparams.end(); ++it) {
std::string p = *it;
if (!p.empty()) {
params.push_back(p);
}
}
}
}
// audio specified.
if (acodec != SRS_ENCODER_NO_AUDIO) {
params.push_back("-acodec");
params.push_back(acodec);
} else {
params.push_back("-an");
}
// the codec params is disabled when copy
if (acodec != SRS_ENCODER_COPY && acodec != SRS_ENCODER_NO_AUDIO) {
params.push_back("-b:a");
snprintf(tmp, sizeof(tmp), "%d", abitrate * 1000);
params.push_back(tmp);
params.push_back("-ar");
snprintf(tmp, sizeof(tmp), "%d", asample_rate);
params.push_back(tmp);
params.push_back("-ac");
snprintf(tmp, sizeof(tmp), "%d", achannels);
params.push_back(tmp);
// aparams
if (!aparams.empty()) {
std::vector<std::string>::iterator it;
for (it = aparams.begin(); it != aparams.end(); ++it) {
std::string p = *it;
if (!p.empty()) {
params.push_back(p);
}
}
}
}
// output
params.push_back("-f");
params.push_back("flv");
params.push_back("-y");
params.push_back(output);
if (true) {
int pparam_size = 8 * 1024;
char* pparam = new char[pparam_size];
char* p = pparam;
char* last = pparam + pparam_size;
for (int i = 0; i < (int)params.size(); i++) {
std::string ffp = params[i];
snprintf(p, last - p, "%s ", ffp.c_str());
p += ffp.length() + 1;
}
srs_trace("start transcoder, log: %s, params: %s",
log_file.c_str(), pparam);
srs_freepa(pparam);
}
// TODO: fork or vfork?
if ((pid = fork()) < 0) {
ret = ERROR_ENCODER_FORK;
srs_error("vfork process failed. ret=%d", ret);
return ret;
}
// child process: ffmpeg encoder engine.
if (pid == 0) {
// redirect logs to file.
int flags = O_CREAT|O_WRONLY|O_APPEND;
mode_t mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH;
if ((log_fd = ::open(log_file.c_str(), flags, mode)) < 0) {
ret = ERROR_ENCODER_OPEN;
srs_error("open encoder file %s failed. ret=%d", log_file.c_str(), ret);
return ret;
}
if (dup2(log_fd, STDOUT_FILENO) < 0) {
ret = ERROR_ENCODER_DUP2;
srs_error("dup2 encoder file failed. ret=%d", ret);
return ret;
}
if (dup2(log_fd, STDERR_FILENO) < 0) {
ret = ERROR_ENCODER_DUP2;
srs_error("dup2 encoder file failed. ret=%d", ret);
return ret;
}
// close other fds
// TODO: do in right way.
for (int i = 3; i < 1024; i++) {
::close(i);
}
// memory leak in child process, it's ok.
char** charpv_params = new char*[params.size() + 1];
for (int i = 0; i < (int)params.size(); i++) {
std::string p = params[i];
charpv_params[i] = (char*)p.c_str();
}
// EOF: NULL
charpv_params[params.size()] = NULL;
// TODO: execv or execvp
ret = execv(ffmpeg.c_str(), charpv_params);
if (ret < 0) {
fprintf(stderr, "fork ffmpeg failed, errno=%d(%s)",
errno, strerror(errno));
}
exit(ret);
}
// parent.
if (pid > 0) {
started = true;
srs_trace("vfored ffmpeg encoder engine, pid=%d", pid);
return ret;
}
return ret;
}
int SrsFFMPEG::cycle()
{
int ret = ERROR_SUCCESS;
if (!started) {
return ret;
}
int status = 0;
pid_t p = waitpid(pid, &status, WNOHANG);
if (p < 0) {
ret = ERROR_SYSTEM_WAITPID;
srs_error("transcode waitpid failed, pid=%d, ret=%d", pid, ret);
return ret;
}
if (p == 0) {
srs_info("transcode process pid=%d is running.", pid);
return ret;
}
srs_trace("transcode process pid=%d terminate, restart it.", pid);
started = false;
return ret;
}
void SrsFFMPEG::stop()
{
if (log_fd > 0) {
::close(log_fd);
log_fd = -1;
}
if (!started) {
return;
}
// kill the ffmpeg,
// when rewind, upstream will stop publish(unpublish),
// unpublish event will stop all ffmpeg encoders,
// then publish will start all ffmpeg encoders.
if (pid > 0) {
if (kill(pid, SIGKILL) < 0) {
srs_warn("kill the encoder failed, ignored. pid=%d", pid);
}
// wait for the ffmpeg to quit.
// ffmpeg will gracefully quit if signal is:
// 1) SIGHUP 2) SIGINT 3) SIGQUIT
// other signals, directly exit(123), for example:
// 9) SIGKILL 15) SIGTERM
int status = 0;
if (waitpid(pid, &status, 0) < 0) {
srs_warn("wait the encoder quit failed, ignored. pid=%d", pid);
}
srs_trace("stop the encoder success. pid=%d", pid);
pid = -1;
}
std::vector<std::string>::iterator it;
it = std::find(_transcoded_url.begin(), _transcoded_url.end(), output);
if (it != _transcoded_url.end()) {
_transcoded_url.erase(it);
}
}
SrsEncoder::SrsEncoder()
{
pthread = new SrsThread(this, SRS_ENCODER_SLEEP_US);

42
trunk/src/app/srs_app_encoder.hpp
View file

@ -39,47 +39,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
class SrsConfDirective;
class SrsRequest;
class SrsPithyPrint;
/**
* a transcode engine: ffmepg,
* used to transcode a stream to another.
*/
class SrsFFMPEG
{
private:
bool started;
pid_t pid;
private:
std::string log_file;
int log_fd;
private:
std::string ffmpeg;
std::vector<std::string> vfilter;
std::string vcodec;
int vbitrate;
double vfps;
int vwidth;
int vheight;
int vthreads;
std::string vprofile;
std::string vpreset;
std::vector<std::string> vparams;
std::string acodec;
int abitrate;
int asample_rate;
int achannels;
std::vector<std::string> aparams;
std::string output;
std::string input;
public:
SrsFFMPEG(std::string ffmpeg_bin);
virtual ~SrsFFMPEG();
public:
virtual int initialize(SrsRequest* req, SrsConfDirective* engine);
virtual int start();
virtual int cycle();
virtual void stop();
};
class SrsFFMPEG;
/**
* the encoder for a stream,

503
trunk/src/app/srs_app_ffmpeg.cpp Normal file
View file

@ -0,0 +1,503 @@
/*
The MIT License (MIT)
Copyright (c) 2013-2014 winlin
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <srs_app_ffmpeg.hpp>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/types.h>
#include <algorithm>
#include <srs_kernel_error.hpp>
#include <srs_kernel_log.hpp>
#include <srs_app_config.hpp>
#include <srs_protocol_rtmp.hpp>
#include <srs_app_pithy_print.hpp>
#include <srs_protocol_rtmp_stack.hpp>
#ifdef SRS_FFMPEG
#define SRS_ENCODER_COPY "copy"
#define SRS_ENCODER_NO_VIDEO "vn"
#define SRS_ENCODER_NO_AUDIO "an"
// only support libx264 encoder.
#define SRS_ENCODER_VCODEC "libx264"
// any aac encoder is ok which contains the aac,
// for example, libaacplus, aac, fdkaac
#define SRS_ENCODER_ACODEC "aac"
// for encoder to detect the dead loop
static std::vector<std::string> _transcoded_url;
SrsFFMPEG::SrsFFMPEG(std::string ffmpeg_bin)
{
started = false;
pid = -1;
ffmpeg = ffmpeg_bin;
vbitrate = 0;
vfps = 0;
vwidth = 0;
vheight = 0;
vthreads = 0;
abitrate = 0;
asample_rate = 0;
achannels = 0;
log_fd = -1;
}
SrsFFMPEG::~SrsFFMPEG()
{
stop();
}
int SrsFFMPEG::initialize(SrsRequest* req, SrsConfDirective* engine)
{
int ret = ERROR_SUCCESS;
_srs_config->get_engine_vfilter(engine, vfilter);
vcodec = _srs_config->get_engine_vcodec(engine);
vbitrate = _srs_config->get_engine_vbitrate(engine);
vfps = _srs_config->get_engine_vfps(engine);
vwidth = _srs_config->get_engine_vwidth(engine);
vheight = _srs_config->get_engine_vheight(engine);
vthreads = _srs_config->get_engine_vthreads(engine);
vprofile = _srs_config->get_engine_vprofile(engine);
vpreset = _srs_config->get_engine_vpreset(engine);
_srs_config->get_engine_vparams(engine, vparams);
acodec = _srs_config->get_engine_acodec(engine);
abitrate = _srs_config->get_engine_abitrate(engine);
asample_rate = _srs_config->get_engine_asample_rate(engine);
achannels = _srs_config->get_engine_achannels(engine);
_srs_config->get_engine_aparams(engine, aparams);
output = _srs_config->get_engine_output(engine);
// ensure the size is even.
vwidth -= vwidth % 2;
vheight -= vheight % 2;
// input stream, from local.
// ie. rtmp://127.0.0.1:1935/live/livestream
input = "rtmp://127.0.0.1:";
input += req->port;
input += "/";
input += req->app;
input += "?vhost=";
input += req->vhost;
input += "/";
input += req->stream;
// output stream, to other/self server
// ie. rtmp://127.0.0.1:1935/live/livestream_sd
output = srs_string_replace(output, "[vhost]", req->vhost);
output = srs_string_replace(output, "[port]", req->port);
output = srs_string_replace(output, "[app]", req->app);
output = srs_string_replace(output, "[stream]", req->stream);
output = srs_string_replace(output, "[engine]", engine->arg0());
// write ffmpeg info to log file.
log_file = _srs_config->get_ffmpeg_log_dir();
log_file += "/";
log_file += "encoder";
log_file += "-";
log_file += req->vhost;
log_file += "-";
log_file += req->app;
log_file += "-";
log_file += req->stream;
log_file += ".log";
// important: loop check, donot transcode again.
std::vector<std::string>::iterator it;
it = std::find(_transcoded_url.begin(), _transcoded_url.end(), input);
if (it != _transcoded_url.end()) {
ret = ERROR_ENCODER_LOOP;
srs_info("detect a loop cycle, input=%s, output=%s, ignore it. ret=%d",
input.c_str(), output.c_str(), ret);
return ret;
}
_transcoded_url.push_back(output);
if (vcodec == SRS_ENCODER_NO_VIDEO && acodec == SRS_ENCODER_NO_AUDIO) {
ret = ERROR_ENCODER_VCODEC;
srs_warn("video and audio disabled. ret=%d", ret);
return ret;
}
if (vcodec != SRS_ENCODER_COPY && vcodec != SRS_ENCODER_NO_VIDEO) {
if (vcodec != SRS_ENCODER_VCODEC) {
ret = ERROR_ENCODER_VCODEC;
srs_error("invalid vcodec, must be %s, actual %s, ret=%d",
SRS_ENCODER_VCODEC, vcodec.c_str(), ret);
return ret;
}
if (vbitrate <= 0) {
ret = ERROR_ENCODER_VBITRATE;
srs_error("invalid vbitrate: %d, ret=%d", vbitrate, ret);
return ret;
}
if (vfps <= 0) {
ret = ERROR_ENCODER_VFPS;
srs_error("invalid vfps: %.2f, ret=%d", vfps, ret);
return ret;
}
if (vwidth <= 0) {
ret = ERROR_ENCODER_VWIDTH;
srs_error("invalid vwidth: %d, ret=%d", vwidth, ret);
return ret;
}
if (vheight <= 0) {
ret = ERROR_ENCODER_VHEIGHT;
srs_error("invalid vheight: %d, ret=%d", vheight, ret);
return ret;
}
if (vthreads < 0) {
ret = ERROR_ENCODER_VTHREADS;
srs_error("invalid vthreads: %d, ret=%d", vthreads, ret);
return ret;
}
if (vprofile.empty()) {
ret = ERROR_ENCODER_VPROFILE;
srs_error("invalid vprofile: %s, ret=%d", vprofile.c_str(), ret);
return ret;
}
if (vpreset.empty()) {
ret = ERROR_ENCODER_VPRESET;
srs_error("invalid vpreset: %s, ret=%d", vpreset.c_str(), ret);
return ret;
}
}
if (acodec != SRS_ENCODER_COPY && acodec != SRS_ENCODER_NO_AUDIO) {
if (acodec.find(SRS_ENCODER_ACODEC) == std::string::npos) {
ret = ERROR_ENCODER_ACODEC;
srs_error("invalid acodec, must be %s, actual %s, ret=%d",
SRS_ENCODER_ACODEC, acodec.c_str(), ret);
return ret;
}
if (abitrate <= 0) {
ret = ERROR_ENCODER_ABITRATE;
srs_error("invalid abitrate: %d, ret=%d",
abitrate, ret);
return ret;
}
if (asample_rate <= 0) {
ret = ERROR_ENCODER_ASAMPLE_RATE;
srs_error("invalid sample rate: %d, ret=%d",
asample_rate, ret);
return ret;
}
if (achannels != 1 && achannels != 2) {
ret = ERROR_ENCODER_ACHANNELS;
srs_error("invalid achannels, must be 1 or 2, actual %d, ret=%d",
achannels, ret);
return ret;
}
}
if (output.empty()) {
ret = ERROR_ENCODER_OUTPUT;
srs_error("invalid empty output, ret=%d", ret);
return ret;
}
return ret;
}
int SrsFFMPEG::start()
{
int ret = ERROR_SUCCESS;
if (started) {
return ret;
}
// prepare exec params
char tmp[256];
std::vector<std::string> params;
// argv[0], set to ffmpeg bin.
// The execv() and execvp() functions ....
// The first argument, by convention, should point to
// the filename associated with the file being executed.
params.push_back(ffmpeg);
// input.
params.push_back("-f");
params.push_back("flv");
params.push_back("-i");
params.push_back(input);
// build the filter
if (!vfilter.empty()) {
std::vector<std::string>::iterator it;
for (it = vfilter.begin(); it != vfilter.end(); ++it) {
std::string p = *it;
if (!p.empty()) {
params.push_back(p);
}
}
}
// video specified.
if (vcodec != SRS_ENCODER_NO_VIDEO) {
params.push_back("-vcodec");
params.push_back(vcodec);
} else {
params.push_back("-vn");
}
// the codec params is disabled when copy
if (vcodec != SRS_ENCODER_COPY && vcodec != SRS_ENCODER_NO_VIDEO) {
params.push_back("-b:v");
snprintf(tmp, sizeof(tmp), "%d", vbitrate * 1000);
params.push_back(tmp);
params.push_back("-r");
snprintf(tmp, sizeof(tmp), "%.2f", vfps);
params.push_back(tmp);
params.push_back("-s");
snprintf(tmp, sizeof(tmp), "%dx%d", vwidth, vheight);
params.push_back(tmp);
// TODO: add aspect if needed.
params.push_back("-aspect");
snprintf(tmp, sizeof(tmp), "%d:%d", vwidth, vheight);
params.push_back(tmp);
params.push_back("-threads");
snprintf(tmp, sizeof(tmp), "%d", vthreads);
params.push_back(tmp);
params.push_back("-profile:v");
params.push_back(vprofile);
params.push_back("-preset");
params.push_back(vpreset);
// vparams
if (!vparams.empty()) {
std::vector<std::string>::iterator it;
for (it = vparams.begin(); it != vparams.end(); ++it) {
std::string p = *it;
if (!p.empty()) {
params.push_back(p);
}
}
}
}
// audio specified.
if (acodec != SRS_ENCODER_NO_AUDIO) {
params.push_back("-acodec");
params.push_back(acodec);
} else {
params.push_back("-an");
}
// the codec params is disabled when copy
if (acodec != SRS_ENCODER_COPY && acodec != SRS_ENCODER_NO_AUDIO) {
params.push_back("-b:a");
snprintf(tmp, sizeof(tmp), "%d", abitrate * 1000);
params.push_back(tmp);
params.push_back("-ar");
snprintf(tmp, sizeof(tmp), "%d", asample_rate);
params.push_back(tmp);
params.push_back("-ac");
snprintf(tmp, sizeof(tmp), "%d", achannels);
params.push_back(tmp);
// aparams
if (!aparams.empty()) {
std::vector<std::string>::iterator it;
for (it = aparams.begin(); it != aparams.end(); ++it) {
std::string p = *it;
if (!p.empty()) {
params.push_back(p);
}
}
}
}
// output
params.push_back("-f");
params.push_back("flv");
params.push_back("-y");
params.push_back(output);
if (true) {
int pparam_size = 8 * 1024;
char* pparam = new char[pparam_size];
char* p = pparam;
char* last = pparam + pparam_size;
for (int i = 0; i < (int)params.size(); i++) {
std::string ffp = params[i];
snprintf(p, last - p, "%s ", ffp.c_str());
p += ffp.length() + 1;
}
srs_trace("start transcoder, log: %s, params: %s",
log_file.c_str(), pparam);
srs_freepa(pparam);
}
// TODO: fork or vfork?
if ((pid = fork()) < 0) {
ret = ERROR_ENCODER_FORK;
srs_error("vfork process failed. ret=%d", ret);
return ret;
}
// child process: ffmpeg encoder engine.
if (pid == 0) {
// redirect logs to file.
int flags = O_CREAT|O_WRONLY|O_APPEND;
mode_t mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH;
if ((log_fd = ::open(log_file.c_str(), flags, mode)) < 0) {
ret = ERROR_ENCODER_OPEN;
srs_error("open encoder file %s failed. ret=%d", log_file.c_str(), ret);
return ret;
}
if (dup2(log_fd, STDOUT_FILENO) < 0) {
ret = ERROR_ENCODER_DUP2;
srs_error("dup2 encoder file failed. ret=%d", ret);
return ret;
}
if (dup2(log_fd, STDERR_FILENO) < 0) {
ret = ERROR_ENCODER_DUP2;
srs_error("dup2 encoder file failed. ret=%d", ret);
return ret;
}
// close other fds
// TODO: do in right way.
for (int i = 3; i < 1024; i++) {
::close(i);
}
// memory leak in child process, it's ok.
char** charpv_params = new char*[params.size() + 1];
for (int i = 0; i < (int)params.size(); i++) {
std::string p = params[i];
charpv_params[i] = (char*)p.c_str();
}
// EOF: NULL
charpv_params[params.size()] = NULL;
// TODO: execv or execvp
ret = execv(ffmpeg.c_str(), charpv_params);
if (ret < 0) {
fprintf(stderr, "fork ffmpeg failed, errno=%d(%s)",
errno, strerror(errno));
}
exit(ret);
}
// parent.
if (pid > 0) {
started = true;
srs_trace("vfored ffmpeg encoder engine, pid=%d", pid);
return ret;
}
return ret;
}
int SrsFFMPEG::cycle()
{
int ret = ERROR_SUCCESS;
if (!started) {
return ret;
}
int status = 0;
pid_t p = waitpid(pid, &status, WNOHANG);
if (p < 0) {
ret = ERROR_SYSTEM_WAITPID;
srs_error("transcode waitpid failed, pid=%d, ret=%d", pid, ret);
return ret;
}
if (p == 0) {
srs_info("transcode process pid=%d is running.", pid);
return ret;
}
srs_trace("transcode process pid=%d terminate, restart it.", pid);
started = false;
return ret;
}
void SrsFFMPEG::stop()
{
if (log_fd > 0) {
::close(log_fd);
log_fd = -1;
}
if (!started) {
return;
}
// kill the ffmpeg,
// when rewind, upstream will stop publish(unpublish),
// unpublish event will stop all ffmpeg encoders,
// then publish will start all ffmpeg encoders.
if (pid > 0) {
if (kill(pid, SIGKILL) < 0) {
srs_warn("kill the encoder failed, ignored. pid=%d", pid);
}
// wait for the ffmpeg to quit.
// ffmpeg will gracefully quit if signal is:
// 1) SIGHUP 2) SIGINT 3) SIGQUIT
// other signals, directly exit(123), for example:
// 9) SIGKILL 15) SIGTERM
int status = 0;
if (waitpid(pid, &status, 0) < 0) {
srs_warn("wait the encoder quit failed, ignored. pid=%d", pid);
}
srs_trace("stop the encoder success. pid=%d", pid);
pid = -1;
}
std::vector<std::string>::iterator it;
it = std::find(_transcoded_url.begin(), _transcoded_url.end(), output);
if (it != _transcoded_url.end()) {
_transcoded_url.erase(it);
}
}
#endif

84
trunk/src/app/srs_app_ffmpeg.hpp Normal file
View file

@ -0,0 +1,84 @@
/*
The MIT License (MIT)
Copyright (c) 2013-2014 winlin
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef SRS_APP_FFMPEG_HPP
#define SRS_APP_FFMPEG_HPP
/*
#include <srs_app_ffmpeg.hpp>
*/
#include <srs_core.hpp>
#ifdef SRS_FFMPEG
#include <string>
#include <vector>
class SrsConfDirective;
class SrsRequest;
class SrsPithyPrint;
/**
* a transcode engine: ffmepg,
* used to transcode a stream to another.
*/
class SrsFFMPEG
{
private:
bool started;
pid_t pid;
private:
std::string log_file;
int log_fd;
private:
std::string ffmpeg;
std::vector<std::string> vfilter;
std::string vcodec;
int vbitrate;
double vfps;
int vwidth;
int vheight;
int vthreads;
std::string vprofile;
std::string vpreset;
std::vector<std::string> vparams;
std::string acodec;
int abitrate;
int asample_rate;
int achannels;
std::vector<std::string> aparams;
std::string output;
std::string input;
public:
SrsFFMPEG(std::string ffmpeg_bin);
virtual ~SrsFFMPEG();
public:
virtual int initialize(SrsRequest* req, SrsConfDirective* engine);
virtual int start();
virtual int cycle();
virtual void stop();
};
#endif
#endif

2
trunk/src/srs/srs.upp
View file

@ -49,6 +49,8 @@ file
..\app\srs_app_config.cpp,
..\app\srs_app_encoder.hpp,
..\app\srs_app_encoder.cpp,
..\app\srs_app_ffmpeg.hpp,
..\app\srs_app_ffmpeg.cpp,
..\app\srs_app_forward.hpp,
..\app\srs_app_forward.cpp,
..\app\srs_app_hls.hpp,