143 lines
4.2 KiB
C
143 lines
4.2 KiB
C
/* ========================== *
|
|
* Microsoft Media Foundation (MMF) mp3 decoder
|
|
* ========================== */
|
|
|
|
#include "mp3.h"
|
|
#include "arena.h"
|
|
#include "playback.h"
|
|
|
|
|
|
|
|
#pragma warning(push, 0)
|
|
# define COBJMACROS
|
|
# define WIN32_LEAN_AND_MEAN
|
|
# define UNICODE
|
|
# include <Windows.h>
|
|
# include <uuids.h>
|
|
# include <mfapi.h>
|
|
# include <mfidl.h>
|
|
# include <mfreadwrite.h>
|
|
# include <Shlwapi.h>
|
|
#pragma warning(pop)
|
|
|
|
#pragma comment(lib, "mfplat")
|
|
#pragma comment(lib, "mfreadwrite")
|
|
#pragma comment(lib, "shlwapi")
|
|
|
|
struct mp3_decode_result mp3_decode(struct arena *arena, struct string encoded, u32 flags)
|
|
{
|
|
struct mp3_decode_result res = ZI;
|
|
|
|
u64 sample_rate = PLAYBACK_SAMPLE_RATE;
|
|
u64 bytes_per_sample = 2;
|
|
|
|
u64 channel_count;
|
|
u32 channel_mask;
|
|
if (flags & MP3_DECODE_FLAG_STEREO) {
|
|
channel_count = 2;
|
|
channel_mask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
|
|
} else {
|
|
channel_count = 1;
|
|
channel_mask = SPEAKER_FRONT_CENTER;
|
|
}
|
|
|
|
/* ========================== *
|
|
* Startup
|
|
* ========================== */
|
|
|
|
MFStartup(MF_VERSION, MFSTARTUP_LITE);
|
|
|
|
/* Create IStream from encoded string */
|
|
IStream *i_stream = SHCreateMemStream(encoded.text, encoded.len);
|
|
|
|
/* Create IMFByteStream from IStream */
|
|
IMFByteStream *byte_stream = NULL;
|
|
MFCreateMFByteStreamOnStream(i_stream, &byte_stream);
|
|
|
|
/* Create reader from IMFByteStream */
|
|
IMFSourceReader *reader;
|
|
MFCreateSourceReaderFromByteStream(byte_stream, NULL, &reader);
|
|
|
|
/* ========================== *
|
|
* Get media type
|
|
* ========================== */
|
|
|
|
/* Read only first audio stream */
|
|
IMFSourceReader_SetStreamSelection(reader, (DWORD)MF_SOURCE_READER_ALL_STREAMS, FALSE);
|
|
IMFSourceReader_SetStreamSelection(reader, (DWORD)MF_SOURCE_READER_FIRST_AUDIO_STREAM, TRUE);
|
|
|
|
WAVEFORMATEXTENSIBLE format = {
|
|
.Format = {
|
|
.wFormatTag = WAVE_FORMAT_EXTENSIBLE,
|
|
.nChannels = (WORD)channel_count,
|
|
.nSamplesPerSec = (WORD)sample_rate,
|
|
.nAvgBytesPerSec = (DWORD)(sample_rate * channel_count * bytes_per_sample),
|
|
.nBlockAlign = (WORD)(channel_count * bytes_per_sample),
|
|
.wBitsPerSample = (WORD)(8 * bytes_per_sample),
|
|
.cbSize = sizeof(format) - sizeof(format.Format)
|
|
},
|
|
.Samples.wValidBitsPerSample = 8 * bytes_per_sample,
|
|
.dwChannelMask = channel_mask,
|
|
.SubFormat = MEDIASUBTYPE_PCM
|
|
};
|
|
|
|
/* Media Foundation in Windows 8+ allows reader to convert output to different format than native */
|
|
IMFMediaType *type;
|
|
MFCreateMediaType(&type);
|
|
MFInitMediaTypeFromWaveFormatEx(type, &format.Format, sizeof(format));
|
|
IMFSourceReader_SetCurrentMediaType(reader, (DWORD)MF_SOURCE_READER_FIRST_AUDIO_STREAM, NULL, type);
|
|
IMFMediaType_Release(type);
|
|
|
|
/* ========================== *
|
|
* Read
|
|
* ========================== */
|
|
|
|
res.pcm.samples = arena_dry_push(arena, i16);
|
|
u64 sample_bytes_read = 0;
|
|
while (true) {
|
|
IMFSample *sample;
|
|
DWORD sample_flags = 0;
|
|
HRESULT hr = IMFSourceReader_ReadSample(reader, (DWORD)MF_SOURCE_READER_FIRST_AUDIO_STREAM, 0, NULL, &sample_flags, NULL, &sample);
|
|
if (FAILED(hr)) {
|
|
break;
|
|
}
|
|
|
|
/* Check if done */
|
|
if (sample_flags & MF_SOURCE_READERF_ENDOFSTREAM) {
|
|
res.success = true;
|
|
break;
|
|
}
|
|
ASSERT(sample_flags == 0);
|
|
|
|
/* Read samples */
|
|
IMFMediaBuffer *buffer;
|
|
IMFSample_ConvertToContiguousBuffer(sample, &buffer);
|
|
|
|
BYTE *src;
|
|
DWORD size_bytes;
|
|
IMFMediaBuffer_Lock(buffer, &src, NULL, &size_bytes);
|
|
{
|
|
i16 *dst = arena_push_array(arena, i16, (size_bytes + 1) >> 1);
|
|
MEMCPY(dst, src, size_bytes);
|
|
sample_bytes_read += size_bytes;
|
|
}
|
|
IMFMediaBuffer_Unlock(buffer);
|
|
|
|
IMediaBuffer_Release(buffer);
|
|
IMFSample_Release(sample);
|
|
}
|
|
|
|
res.pcm.count = sample_bytes_read / bytes_per_sample;
|
|
|
|
/* ========================== *
|
|
* Cleanup
|
|
* ========================== */
|
|
|
|
IMFSourceReader_Release(reader);
|
|
IMFByteStream_Close(byte_stream);
|
|
IStream_Release(i_stream);
|
|
MFShutdown();
|
|
|
|
return res;
|
|
}
|