first init of 0.9
This commit is contained in:
cnjinhao
237
source/audio/detail/audio_device.cpp
Normal file
237
source/audio/detail/audio_device.cpp
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@@ -0,0 +1,237 @@
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#include <nana/audio/detail/audio_device.hpp>
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#include <nana/system/platform.hpp>
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#if defined(NANA_LINUX)
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#include <pthread.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <errno.h>
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#endif
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namespace nana{namespace audio
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{
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namespace detail
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{
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#if defined(NANA_WINDOWS)
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class wave_native
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{
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typedef MMRESULT (__stdcall *out_open_t)(LPHWAVEOUT, UINT_PTR, LPWAVEFORMATEX, DWORD_PTR, DWORD_PTR, DWORD);
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typedef MMRESULT (__stdcall *out_close_t)(HWAVEOUT);
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typedef MMRESULT (__stdcall *out_op_header_t)(HWAVEOUT, LPWAVEHDR, UINT);
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public:
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out_open_t out_open;
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out_close_t out_close;
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out_op_header_t out_write;
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out_op_header_t out_prepare;
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out_op_header_t out_unprepare;
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wave_native()
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{
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HMODULE winmm = ::GetModuleHandleA("Winmm.DLL");
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if(0 == winmm)
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winmm = ::LoadLibraryA("Winmm.DLL");
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out_open = reinterpret_cast<out_open_t>(::GetProcAddress(winmm, "waveOutOpen"));
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out_close = reinterpret_cast<out_close_t>(::GetProcAddress(winmm, "waveOutClose"));
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out_write = reinterpret_cast<out_op_header_t>(::GetProcAddress(winmm, "waveOutWrite"));
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out_prepare = reinterpret_cast<out_op_header_t>(::GetProcAddress(winmm, "waveOutPrepareHeader"));
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out_unprepare = reinterpret_cast<out_op_header_t>(::GetProcAddress(winmm, "waveOutUnprepareHeader"));
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}
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}wave_native_if;
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#endif
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//class audio_device
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audio_device::audio_device()
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#if defined(NANA_WINDOWS)
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: handle_(nullptr), buf_prep_(nullptr)
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#elif defined(NANA_LINUX)
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: handle_(nullptr), buf_prep_(nullptr)
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#endif
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{}
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audio_device::~audio_device()
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{
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close();
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}
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bool audio_device::empty() const
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{
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return (nullptr == handle_);
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}
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bool audio_device::open(std::size_t channels, std::size_t rate, std::size_t bits_per_sample)
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{
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#if defined(NANA_WINDOWS)
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close();
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WAVEFORMATEX wfx;
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wfx.wFormatTag = WAVE_FORMAT_PCM;
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wfx.nChannels = static_cast<WORD>(channels);
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wfx.nSamplesPerSec = static_cast<DWORD>(rate);
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wfx.wBitsPerSample = static_cast<WORD>(bits_per_sample);
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wfx.nBlockAlign = (wfx.wBitsPerSample >> 3 ) * wfx.nChannels;
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wfx.nAvgBytesPerSec = wfx.nBlockAlign * wfx.nSamplesPerSec;
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wfx.cbSize = 0;
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MMRESULT mmr = wave_native_if.out_open(&handle_, WAVE_MAPPER, &wfx, reinterpret_cast<DWORD_PTR>(&audio_device::_m_dev_callback), reinterpret_cast<DWORD_PTR>(this), CALLBACK_FUNCTION);
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return (mmr == MMSYSERR_NOERROR);
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#elif defined(NANA_LINUX)
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if(nullptr == handle_)
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{
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if(::snd_pcm_open(&handle_, "plughw:0,0", SND_PCM_STREAM_PLAYBACK, 0) < 0)
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return false;
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}
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if(handle_)
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{
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channels_ = channels;
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rate_ = rate;
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bytes_per_sample_ = (bits_per_sample >> 3);
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bytes_per_frame_ = bytes_per_sample_ * channels;
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snd_pcm_hw_params_t * params;
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if(snd_pcm_hw_params_malloc(¶ms) < 0)
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{
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close();
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return false;
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}
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if(::snd_pcm_hw_params_any(handle_, params) < 0)
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{
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close();
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::snd_pcm_hw_params_free(params);
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return false;
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}
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if(::snd_pcm_hw_params_set_access(handle_, params, SND_PCM_ACCESS_RW_INTERLEAVED) < 0)
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{
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close();
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::snd_pcm_hw_params_free(params);
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return false;
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}
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snd_pcm_format_t format = SND_PCM_FORMAT_U8;
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switch(bits_per_sample)
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{
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case 8:
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format = SND_PCM_FORMAT_U8; break;
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case 16:
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format = SND_PCM_FORMAT_S16_LE; break;
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case 32:
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format = SND_PCM_FORMAT_S32_LE; break;
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}
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if(::snd_pcm_hw_params_set_format(handle_, params, format) < 0)
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{
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close();
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::snd_pcm_hw_params_free(params);
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return false;
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}
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unsigned tmp = rate;
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if(::snd_pcm_hw_params_set_rate_near(handle_, params, &tmp, 0) < 0)
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{
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close();
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::snd_pcm_hw_params_free(params);
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return false;
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}
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if(::snd_pcm_hw_params_set_channels(handle_, params, channels) < 0)
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{
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close();
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::snd_pcm_hw_params_free(params);
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return false;
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}
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if(::snd_pcm_hw_params(handle_, params) < 0)
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{
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close();
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::snd_pcm_hw_params_free(params);
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return false;
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}
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::snd_pcm_hw_params_free(params);
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::snd_pcm_prepare(handle_);
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return true;
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}
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return false;
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#endif
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}
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void audio_device::close()
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{
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if(handle_)
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{
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#if defined(NANA_WINDOWS)
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wave_native_if.out_close(handle_);
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#elif defined(NANA_LINUX)
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::snd_pcm_close(handle_);
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#endif
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handle_ = nullptr;
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}
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}
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void audio_device::prepare(buffer_preparation & buf_prep)
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{
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buf_prep_ = & buf_prep;
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}
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void audio_device::write(buffer_preparation::meta * m)
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{
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#if defined(NANA_WINDOWS)
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std::lock_guard<decltype(queue_lock_)> lock(queue_lock_);
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done_queue_.push_back(m);
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if(m->dwFlags & WHDR_PREPARED)
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wave_native_if.out_unprepare(handle_, m, sizeof(WAVEHDR));
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wave_native_if.out_prepare(handle_, m, sizeof(WAVEHDR));
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wave_native_if.out_write(handle_, m, sizeof(WAVEHDR));
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#elif defined(NANA_LINUX)
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std::size_t frames = m->bufsize / bytes_per_frame_;
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std::size_t buffered = 0; //in bytes
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while(frames > 0)
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{
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int err = ::snd_pcm_writei(handle_, m->buf + buffered, frames);
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if(err > 0)
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{
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frames -= err;
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buffered += err * bytes_per_frame_;
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}
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else if(-EPIPE == err)
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::snd_pcm_prepare(handle_);
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}
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buf_prep_->revert(m);
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#endif
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}
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void audio_device::wait_for_drain() const
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{
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#if defined(NANA_WINDOWS)
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while(buf_prep_->data_finished() == false)
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nana::system::sleep(200);
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#elif defined(NANA_LINUX)
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while(::snd_pcm_state(handle_) == SND_PCM_STATE_RUNNING)
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nana::system::sleep(200);
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#endif
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}
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#if defined(NANA_WINDOWS)
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void __stdcall audio_device::_m_dev_callback(HWAVEOUT handle, UINT msg, audio_device * self, DWORD_PTR, DWORD_PTR)
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{
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if(WOM_DONE == msg)
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{
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buffer_preparation::meta * m;
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{
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std::lock_guard<decltype(queue_lock_)> lock(self->queue_lock_);
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m = self->done_queue_.front();
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self->done_queue_.erase(self->done_queue_.begin());
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}
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wave_native_if.out_unprepare(handle, m, sizeof(WAVEHDR));
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self->buf_prep_->revert(m);
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}
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}
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#endif
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//end class audio_device
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}//end namespace detail
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}//end namespace audio
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}//end namespace nana
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91
source/audio/detail/audio_stream.cpp
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91
source/audio/detail/audio_stream.cpp
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@@ -0,0 +1,91 @@
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#include <nana/audio/detail/audio_stream.hpp>
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#include <nana/charset.hpp>
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namespace nana{ namespace audio
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{
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namespace detail
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{
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//class audio_stream
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bool audio_stream::open(const nana::string& file)
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{
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fs_.open(static_cast<std::string>(nana::charset(file)), std::ios::binary);
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if(fs_)
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{
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wave_spec::master_riff_chunk riff;
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fs_.read(reinterpret_cast<char*>(&riff), sizeof(riff));
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if(riff.ckID == *reinterpret_cast<const unsigned long*>("RIFF") && riff.waveID == *reinterpret_cast<const unsigned long*>("WAVE"))
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{
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fs_.read(reinterpret_cast<char*>(&ck_format_), sizeof(ck_format_));
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if(ck_format_.ckID == *reinterpret_cast<const unsigned long*>("fmt ") && ck_format_.wFormatTag == 1) //Only support PCM format
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{
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std::size_t cksize = _m_locate_chunck(*reinterpret_cast<const unsigned long*>("data"));
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if(cksize)
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{
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pcm_data_pos_ = static_cast<std::size_t>(fs_.tellg());
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pcm_data_size_ = cksize;
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return true;
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}
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}
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}
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}
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return false;
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}
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void audio_stream::close()
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{
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fs_.close();
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}
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bool audio_stream::empty() const
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{
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return (!fs_);
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}
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const wave_spec::format_chunck & audio_stream::format() const
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{
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return ck_format_;
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}
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std::size_t audio_stream::data_length() const
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{
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return data_size_;
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}
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void audio_stream::locate()
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{
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fs_.clear();
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fs_.seekg(pcm_data_pos_, std::ios::beg);
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data_size_ = pcm_data_size_;
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}
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std::size_t audio_stream::read(void * buf, std::size_t len)
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{
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fs_.read(reinterpret_cast<char*>(buf), static_cast<std::streamsize>(len <= data_size_ ? len : data_size_));
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std::size_t read_bytes = static_cast<std::size_t>(fs_.gcount());
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data_size_ -= read_bytes;
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return read_bytes;
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}
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std::size_t audio_stream::_m_locate_chunck(unsigned ckID)
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{
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chunck ck;
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while(true)
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{
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fs_.read(reinterpret_cast<char*>(&ck), sizeof(ck));
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if(fs_.gcount() != sizeof(ck))
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break;
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if(ck.ckID == ckID)
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return ck.cksize;
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if(ck.ckID == *reinterpret_cast<const unsigned long*>("data"))
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fs_.seekg(ck.cksize + (ck.cksize & 1 ? 1 : 0), std::ios::cur);
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else
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fs_.seekg(ck.cksize, std::ios::cur);
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}
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return 0;
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}
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//end class audio_stream
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}//end namespace detail
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}//end namespace audio
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}//end namespace nana
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161
source/audio/detail/buffer_preparation.cpp
Normal file
161
source/audio/detail/buffer_preparation.cpp
Normal file
@@ -0,0 +1,161 @@
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#include <nana/audio/detail/buffer_preparation.hpp>
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#include <cstring>
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namespace nana{ namespace audio
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{
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namespace detail
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{
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//class buffer_preparation
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buffer_preparation::buffer_preparation(audio_stream& as, std::size_t seconds)
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: running_(true), wait_for_buffer_(false), as_(as)
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{
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//Allocate the space
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buffer_.reserve(seconds);
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prepared_.reserve(seconds);
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const wave_spec::format_chunck & ck = as.format();
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block_size_ = ck.nAvgBytesPerSec;
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for(std::size_t i = 0; i < seconds; ++i)
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{
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char * rawbuf = new char[sizeof(meta) + ck.nAvgBytesPerSec];
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meta * m = reinterpret_cast<meta*>(rawbuf);
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#if defined(NANA_WINDOWS)
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memset(m, 0, sizeof(meta));
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m->dwBufferLength = static_cast<unsigned long>(block_size_);
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m->lpData = rawbuf + sizeof(meta);
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#elif defined(NANA_LINUX)
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m->bufsize = ck.nAvgBytesPerSec;
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m->buf = rawbuf + sizeof(meta);
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#endif
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prepared_.push_back(m);
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}
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thr_ = std::move(std::thread([this](){this->_m_prepare_routine();}));
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}
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buffer_preparation::~buffer_preparation()
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{
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running_ = false;
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cond_prepared_.notify_one();
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cond_buffer_.notify_one();
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if(thr_.joinable())
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thr_.join();
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for(auto metaptr : prepared_)
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delete [] reinterpret_cast<char*>(metaptr);
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}
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buffer_preparation::meta * buffer_preparation::read()
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{
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std::unique_lock<decltype(token_buffer_)> lock(token_buffer_);
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//Wait for the buffer
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if(0 == buffer_.size())
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{
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//Before waiting, checks the thread whether it is finished
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//it indicates the preparation is finished.
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if(false == running_)
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return nullptr;
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wait_for_buffer_ = true;
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cond_buffer_.wait(lock);
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//NO more buffers
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if(0 == buffer_.size())
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return nullptr;
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}
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meta * m = buffer_.front();
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buffer_.erase(buffer_.begin());
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return m;
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}
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//Revert the meta that returned by read()
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void buffer_preparation::revert(meta * m)
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{
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std::lock_guard<decltype(token_prepared_)> lock(token_prepared_);
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bool if_signal = prepared_.empty();
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prepared_.push_back(m);
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if(if_signal)
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cond_prepared_.notify_one();
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}
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bool buffer_preparation::data_finished() const
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{
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std::lock_guard<decltype(token_prepared_)> lock(token_prepared_);
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return ((prepared_.size() == prepared_.capacity()) && (running_ == false));
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}
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void buffer_preparation::_m_prepare_routine()
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{
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const std::size_t fixed_bufsize = 1024;
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char buf[fixed_bufsize];
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const std::size_t block_size = block_size_;
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while(running_)
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{
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meta * m = 0;
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{
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std::unique_lock<decltype(token_prepared_)> lock(token_prepared_);
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if(prepared_.size() == 0)
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{
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cond_prepared_.wait(lock);
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if(false == running_)
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return;
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}
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m = prepared_.back();
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prepared_.pop_back();
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}
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std::size_t buffered = 0;
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while(buffered != block_size)
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{
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std::size_t want_bytes = block_size - buffered;
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if(want_bytes > fixed_bufsize) want_bytes = fixed_bufsize;
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std::size_t read_bytes = as_.read(buf, want_bytes);
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if(read_bytes)
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{
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#if defined(NANA_WINDOWS)
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memcpy(m->lpData + buffered, buf, read_bytes);
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#elif defined(NANA_LINUX)
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memcpy(m->buf + buffered, buf, read_bytes);
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#endif
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buffered += read_bytes;
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}
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else if(0 == as_.data_length())
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{
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if(buffered == 0)
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||||
{
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//PCM data is drained
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std::lock_guard<decltype(token_buffer_)> lock(token_buffer_);
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cond_buffer_.notify_one();
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running_ = false;
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||||
return;
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||||
}
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break;
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}
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||||
}
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||||
#if defined(NANA_WINDOWS)
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||||
m->dwBufferLength = static_cast<unsigned long>(buffered);
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||||
#elif defined(NANA_LINUX)
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m->bufsize = buffered;
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||||
#endif
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||||
std::lock_guard<decltype(token_buffer_)> lock(token_buffer_);
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||||
buffer_.push_back(m);
|
||||
if(wait_for_buffer_)
|
||||
{
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||||
cond_buffer_.notify_one();
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||||
wait_for_buffer_ = false;
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||||
}
|
||||
if(0 == as_.data_length())
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||||
running_ = false;
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||||
}
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||||
}
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||||
//end class buffer_preparation
|
||||
}//end namespace detail
|
||||
}//end namespace audio
|
||||
}//end namespace nana
|
||||
Reference in New Issue
Block a user