497 lines
14 KiB
C
497 lines
14 KiB
C
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/*
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This implements a data source that decodes Opus streams via libopus + libopusfile
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This object can be plugged into any `ma_data_source_*()` API and can also be used as a custom
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decoding backend. See the custom_decoder example.
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You need to include this file after miniaudio.h.
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*/
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#ifndef miniaudio_libopus_h
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#define miniaudio_libopus_h
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if !defined(MA_NO_LIBOPUS)
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#include <opusfile.h>
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#endif
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typedef struct
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{
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ma_data_source_base ds; /* The libopus decoder can be used independently as a data source. */
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ma_read_proc onRead;
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ma_seek_proc onSeek;
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ma_tell_proc onTell;
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void* pReadSeekTellUserData;
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ma_format format; /* Will be either f32 or s16. */
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#if !defined(MA_NO_LIBOPUS)
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OggOpusFile* of;
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#endif
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} ma_libopus;
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MA_API ma_result ma_libopus_init(ma_read_proc onRead, ma_seek_proc onSeek, ma_tell_proc onTell, void* pReadSeekTellUserData, const ma_decoding_backend_config* pConfig, const ma_allocation_callbacks* pAllocationCallbacks, ma_libopus* pOpus);
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MA_API ma_result ma_libopus_init_file(const char* pFilePath, const ma_decoding_backend_config* pConfig, const ma_allocation_callbacks* pAllocationCallbacks, ma_libopus* pOpus);
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MA_API void ma_libopus_uninit(ma_libopus* pOpus, const ma_allocation_callbacks* pAllocationCallbacks);
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MA_API ma_result ma_libopus_read_pcm_frames(ma_libopus* pOpus, void* pFramesOut, ma_uint64 frameCount, ma_uint64* pFramesRead);
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MA_API ma_result ma_libopus_seek_to_pcm_frame(ma_libopus* pOpus, ma_uint64 frameIndex);
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MA_API ma_result ma_libopus_get_data_format(ma_libopus* pOpus, ma_format* pFormat, ma_uint32* pChannels, ma_uint32* pSampleRate, ma_channel* pChannelMap, size_t channelMapCap);
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MA_API ma_result ma_libopus_get_cursor_in_pcm_frames(ma_libopus* pOpus, ma_uint64* pCursor);
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MA_API ma_result ma_libopus_get_length_in_pcm_frames(ma_libopus* pOpus, ma_uint64* pLength);
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#ifdef __cplusplus
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}
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#endif
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#endif
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#if defined(MINIAUDIO_IMPLEMENTATION) || defined(MA_IMPLEMENTATION)
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static ma_result ma_libopus_ds_read(ma_data_source* pDataSource, void* pFramesOut, ma_uint64 frameCount, ma_uint64* pFramesRead)
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{
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return ma_libopus_read_pcm_frames((ma_libopus*)pDataSource, pFramesOut, frameCount, pFramesRead);
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}
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static ma_result ma_libopus_ds_seek(ma_data_source* pDataSource, ma_uint64 frameIndex)
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{
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return ma_libopus_seek_to_pcm_frame((ma_libopus*)pDataSource, frameIndex);
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}
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static ma_result ma_libopus_ds_get_data_format(ma_data_source* pDataSource, ma_format* pFormat, ma_uint32* pChannels, ma_uint32* pSampleRate, ma_channel* pChannelMap, size_t channelMapCap)
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{
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return ma_libopus_get_data_format((ma_libopus*)pDataSource, pFormat, pChannels, pSampleRate, pChannelMap, channelMapCap);
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}
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static ma_result ma_libopus_ds_get_cursor(ma_data_source* pDataSource, ma_uint64* pCursor)
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{
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return ma_libopus_get_cursor_in_pcm_frames((ma_libopus*)pDataSource, pCursor);
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}
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static ma_result ma_libopus_ds_get_length(ma_data_source* pDataSource, ma_uint64* pLength)
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{
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return ma_libopus_get_length_in_pcm_frames((ma_libopus*)pDataSource, pLength);
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}
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static ma_data_source_vtable g_ma_libopus_ds_vtable =
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{
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ma_libopus_ds_read,
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ma_libopus_ds_seek,
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ma_libopus_ds_get_data_format,
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ma_libopus_ds_get_cursor,
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ma_libopus_ds_get_length
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};
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#if !defined(MA_NO_LIBOPUS)
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static int ma_libopus_of_callback__read(void* pUserData, unsigned char* pBufferOut, int bytesToRead)
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{
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ma_libopus* pOpus = (ma_libopus*)pUserData;
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ma_result result;
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size_t bytesRead;
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result = pOpus->onRead(pOpus->pReadSeekTellUserData, (void*)pBufferOut, bytesToRead, &bytesRead);
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if (result != MA_SUCCESS) {
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return -1;
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}
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return (int)bytesRead;
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}
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static int ma_libopus_of_callback__seek(void* pUserData, ogg_int64_t offset, int whence)
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{
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ma_libopus* pOpus = (ma_libopus*)pUserData;
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ma_result result;
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ma_seek_origin origin;
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if (whence == SEEK_SET) {
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origin = ma_seek_origin_start;
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} else if (whence == SEEK_END) {
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origin = ma_seek_origin_end;
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} else {
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origin = ma_seek_origin_current;
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}
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result = pOpus->onSeek(pOpus->pReadSeekTellUserData, offset, origin);
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if (result != MA_SUCCESS) {
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return -1;
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}
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return 0;
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}
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static opus_int64 ma_libopus_of_callback__tell(void* pUserData)
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{
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ma_libopus* pOpus = (ma_libopus*)pUserData;
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ma_result result;
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ma_int64 cursor;
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if (pOpus->onTell == NULL) {
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return -1;
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}
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result = pOpus->onTell(pOpus->pReadSeekTellUserData, &cursor);
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if (result != MA_SUCCESS) {
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return -1;
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}
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return cursor;
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}
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#endif
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static ma_result ma_libopus_init_internal(const ma_decoding_backend_config* pConfig, ma_libopus* pOpus)
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{
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ma_result result;
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ma_data_source_config dataSourceConfig;
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if (pOpus == NULL) {
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return MA_INVALID_ARGS;
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}
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MA_ZERO_OBJECT(pOpus);
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pOpus->format = ma_format_f32; /* f32 by default. */
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if (pConfig != NULL && (pConfig->preferredFormat == ma_format_f32 || pConfig->preferredFormat == ma_format_s16)) {
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pOpus->format = pConfig->preferredFormat;
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} else {
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/* Getting here means something other than f32 and s16 was specified. Just leave this unset to use the default format. */
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}
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dataSourceConfig = ma_data_source_config_init();
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dataSourceConfig.vtable = &g_ma_libopus_ds_vtable;
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result = ma_data_source_init(&dataSourceConfig, &pOpus->ds);
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if (result != MA_SUCCESS) {
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return result; /* Failed to initialize the base data source. */
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}
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return MA_SUCCESS;
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}
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MA_API ma_result ma_libopus_init(ma_read_proc onRead, ma_seek_proc onSeek, ma_tell_proc onTell, void* pReadSeekTellUserData, const ma_decoding_backend_config* pConfig, const ma_allocation_callbacks* pAllocationCallbacks, ma_libopus* pOpus)
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{
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ma_result result;
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(void)pAllocationCallbacks; /* Can't seem to find a way to configure memory allocations in libopus. */
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result = ma_libopus_init_internal(pConfig, pOpus);
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if (result != MA_SUCCESS) {
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return result;
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}
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if (onRead == NULL || onSeek == NULL) {
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return MA_INVALID_ARGS; /* onRead and onSeek are mandatory. */
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}
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pOpus->onRead = onRead;
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pOpus->onSeek = onSeek;
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pOpus->onTell = onTell;
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pOpus->pReadSeekTellUserData = pReadSeekTellUserData;
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#if !defined(MA_NO_LIBOPUS)
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{
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int libopusResult;
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OpusFileCallbacks libopusCallbacks;
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/* We can now initialize the Opus decoder. This must be done after we've set up the callbacks. */
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libopusCallbacks.read = ma_libopus_of_callback__read;
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libopusCallbacks.seek = ma_libopus_of_callback__seek;
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libopusCallbacks.close = NULL;
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libopusCallbacks.tell = ma_libopus_of_callback__tell;
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pOpus->of = op_open_callbacks(pOpus, &libopusCallbacks, NULL, 0, &libopusResult);
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if (pOpus->of == NULL) {
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return MA_INVALID_FILE;
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}
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return MA_SUCCESS;
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}
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#else
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{
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/* libopus is disabled. */
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return MA_NOT_IMPLEMENTED;
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}
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#endif
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}
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MA_API ma_result ma_libopus_init_file(const char* pFilePath, const ma_decoding_backend_config* pConfig, const ma_allocation_callbacks* pAllocationCallbacks, ma_libopus* pOpus)
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{
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ma_result result;
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(void)pAllocationCallbacks; /* Can't seem to find a way to configure memory allocations in libopus. */
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result = ma_libopus_init_internal(pConfig, pOpus);
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if (result != MA_SUCCESS) {
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return result;
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}
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#if !defined(MA_NO_LIBOPUS)
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{
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int libopusResult;
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pOpus->of = op_open_file(pFilePath, &libopusResult);
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if (pOpus->of == NULL) {
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return MA_INVALID_FILE;
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}
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return MA_SUCCESS;
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}
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#else
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{
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/* libopus is disabled. */
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(void)pFilePath;
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return MA_NOT_IMPLEMENTED;
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}
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#endif
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}
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MA_API void ma_libopus_uninit(ma_libopus* pOpus, const ma_allocation_callbacks* pAllocationCallbacks)
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{
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if (pOpus == NULL) {
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return;
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}
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(void)pAllocationCallbacks;
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#if !defined(MA_NO_LIBOPUS)
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{
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op_free(pOpus->of);
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}
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#else
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{
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/* libopus is disabled. Should never hit this since initialization would have failed. */
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MA_ASSERT(MA_FALSE);
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}
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#endif
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ma_data_source_uninit(&pOpus->ds);
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}
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MA_API ma_result ma_libopus_read_pcm_frames(ma_libopus* pOpus, void* pFramesOut, ma_uint64 frameCount, ma_uint64* pFramesRead)
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{
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if (pFramesRead != NULL) {
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*pFramesRead = 0;
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}
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if (frameCount == 0) {
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return MA_INVALID_ARGS;
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}
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if (pOpus == NULL) {
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return MA_INVALID_ARGS;
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}
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#if !defined(MA_NO_LIBOPUS)
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{
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/* We always use floating point format. */
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ma_result result = MA_SUCCESS; /* Must be initialized to MA_SUCCESS. */
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ma_uint64 totalFramesRead;
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ma_format format;
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ma_uint32 channels;
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ma_libopus_get_data_format(pOpus, &format, &channels, NULL, NULL, 0);
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totalFramesRead = 0;
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while (totalFramesRead < frameCount) {
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long libopusResult;
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int framesToRead;
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ma_uint64 framesRemaining;
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framesRemaining = (frameCount - totalFramesRead);
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framesToRead = 1024;
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if (framesToRead > framesRemaining) {
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framesToRead = (int)framesRemaining;
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}
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if (format == ma_format_f32) {
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libopusResult = op_read_float(pOpus->of, (float*)ma_offset_pcm_frames_ptr(pFramesOut, totalFramesRead, format, channels), framesToRead * channels, NULL);
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} else {
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libopusResult = op_read (pOpus->of, (opus_int16*)ma_offset_pcm_frames_ptr(pFramesOut, totalFramesRead, format, channels), framesToRead * channels, NULL);
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}
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if (libopusResult < 0) {
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result = MA_ERROR; /* Error while decoding. */
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break;
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} else {
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totalFramesRead += libopusResult;
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if (libopusResult == 0) {
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result = MA_AT_END;
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break;
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}
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}
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}
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if (pFramesRead != NULL) {
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*pFramesRead = totalFramesRead;
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}
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if (result == MA_SUCCESS && totalFramesRead == 0) {
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result = MA_AT_END;
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}
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return result;
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}
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#else
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{
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/* libopus is disabled. Should never hit this since initialization would have failed. */
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MA_ASSERT(MA_FALSE);
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(void)pFramesOut;
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(void)frameCount;
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(void)pFramesRead;
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return MA_NOT_IMPLEMENTED;
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}
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#endif
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}
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MA_API ma_result ma_libopus_seek_to_pcm_frame(ma_libopus* pOpus, ma_uint64 frameIndex)
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{
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if (pOpus == NULL) {
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return MA_INVALID_ARGS;
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}
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#if !defined(MA_NO_LIBOPUS)
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{
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int libopusResult = op_pcm_seek(pOpus->of, (ogg_int64_t)frameIndex);
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if (libopusResult != 0) {
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if (libopusResult == OP_ENOSEEK) {
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return MA_INVALID_OPERATION; /* Not seekable. */
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} else if (libopusResult == OP_EINVAL) {
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return MA_INVALID_ARGS;
|
||
|
|
} else {
|
||
|
|
return MA_ERROR;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return MA_SUCCESS;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
{
|
||
|
|
/* libopus is disabled. Should never hit this since initialization would have failed. */
|
||
|
|
MA_ASSERT(MA_FALSE);
|
||
|
|
|
||
|
|
(void)frameIndex;
|
||
|
|
|
||
|
|
return MA_NOT_IMPLEMENTED;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
MA_API ma_result ma_libopus_get_data_format(ma_libopus* pOpus, ma_format* pFormat, ma_uint32* pChannels, ma_uint32* pSampleRate, ma_channel* pChannelMap, size_t channelMapCap)
|
||
|
|
{
|
||
|
|
/* Defaults for safety. */
|
||
|
|
if (pFormat != NULL) {
|
||
|
|
*pFormat = ma_format_unknown;
|
||
|
|
}
|
||
|
|
if (pChannels != NULL) {
|
||
|
|
*pChannels = 0;
|
||
|
|
}
|
||
|
|
if (pSampleRate != NULL) {
|
||
|
|
*pSampleRate = 0;
|
||
|
|
}
|
||
|
|
if (pChannelMap != NULL) {
|
||
|
|
MA_ZERO_MEMORY(pChannelMap, sizeof(*pChannelMap) * channelMapCap);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pOpus == NULL) {
|
||
|
|
return MA_INVALID_OPERATION;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pFormat != NULL) {
|
||
|
|
*pFormat = pOpus->format;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if !defined(MA_NO_LIBOPUS)
|
||
|
|
{
|
||
|
|
ma_uint32 channels = op_channel_count(pOpus->of, -1);
|
||
|
|
|
||
|
|
if (pChannels != NULL) {
|
||
|
|
*pChannels = channels;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pSampleRate != NULL) {
|
||
|
|
*pSampleRate = 48000;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pChannelMap != NULL) {
|
||
|
|
ma_channel_map_init_standard(ma_standard_channel_map_vorbis, pChannelMap, channelMapCap, channels);
|
||
|
|
}
|
||
|
|
|
||
|
|
return MA_SUCCESS;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
{
|
||
|
|
/* libopus is disabled. Should never hit this since initialization would have failed. */
|
||
|
|
MA_ASSERT(MA_FALSE);
|
||
|
|
return MA_NOT_IMPLEMENTED;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
MA_API ma_result ma_libopus_get_cursor_in_pcm_frames(ma_libopus* pOpus, ma_uint64* pCursor)
|
||
|
|
{
|
||
|
|
if (pCursor == NULL) {
|
||
|
|
return MA_INVALID_ARGS;
|
||
|
|
}
|
||
|
|
|
||
|
|
*pCursor = 0; /* Safety. */
|
||
|
|
|
||
|
|
if (pOpus == NULL) {
|
||
|
|
return MA_INVALID_ARGS;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if !defined(MA_NO_LIBOPUS)
|
||
|
|
{
|
||
|
|
ogg_int64_t offset = op_pcm_tell(pOpus->of);
|
||
|
|
if (offset < 0) {
|
||
|
|
return MA_INVALID_FILE;
|
||
|
|
}
|
||
|
|
|
||
|
|
*pCursor = (ma_uint64)offset;
|
||
|
|
|
||
|
|
return MA_SUCCESS;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
{
|
||
|
|
/* libopus is disabled. Should never hit this since initialization would have failed. */
|
||
|
|
MA_ASSERT(MA_FALSE);
|
||
|
|
return MA_NOT_IMPLEMENTED;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
MA_API ma_result ma_libopus_get_length_in_pcm_frames(ma_libopus* pOpus, ma_uint64* pLength)
|
||
|
|
{
|
||
|
|
if (pLength == NULL) {
|
||
|
|
return MA_INVALID_ARGS;
|
||
|
|
}
|
||
|
|
|
||
|
|
*pLength = 0; /* Safety. */
|
||
|
|
|
||
|
|
if (pOpus == NULL) {
|
||
|
|
return MA_INVALID_ARGS;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if !defined(MA_NO_LIBOPUS)
|
||
|
|
{
|
||
|
|
ogg_int64_t length = op_pcm_total(pOpus->of, -1);
|
||
|
|
if (length < 0) {
|
||
|
|
return MA_ERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
*pLength = (ma_uint64)length;
|
||
|
|
|
||
|
|
return MA_SUCCESS;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
{
|
||
|
|
/* libopus is disabled. Should never hit this since initialization would have failed. */
|
||
|
|
MA_ASSERT(MA_FALSE);
|
||
|
|
return MA_NOT_IMPLEMENTED;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|