517 lines
16 KiB
C
517 lines
16 KiB
C
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/*
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This implements a data source that decodes Vorbis streams via libvorbis + libvorbisfile
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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_libvorbis_h
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#define miniaudio_libvorbis_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_LIBVORBIS)
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#ifndef OV_EXCLUDE_STATIC_CALLBACKS
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#define OV_EXCLUDE_STATIC_CALLBACKS
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#endif
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#include <vorbis/vorbisfile.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 libvorbis 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_LIBVORBIS)
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OggVorbis_File vf;
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#endif
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} ma_libvorbis;
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MA_API ma_result ma_libvorbis_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_libvorbis* pVorbis);
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MA_API ma_result ma_libvorbis_init_file(const char* pFilePath, const ma_decoding_backend_config* pConfig, const ma_allocation_callbacks* pAllocationCallbacks, ma_libvorbis* pVorbis);
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MA_API void ma_libvorbis_uninit(ma_libvorbis* pVorbis, const ma_allocation_callbacks* pAllocationCallbacks);
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MA_API ma_result ma_libvorbis_read_pcm_frames(ma_libvorbis* pVorbis, void* pFramesOut, ma_uint64 frameCount, ma_uint64* pFramesRead);
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MA_API ma_result ma_libvorbis_seek_to_pcm_frame(ma_libvorbis* pVorbis, ma_uint64 frameIndex);
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MA_API ma_result ma_libvorbis_get_data_format(ma_libvorbis* pVorbis, ma_format* pFormat, ma_uint32* pChannels, ma_uint32* pSampleRate, ma_channel* pChannelMap, size_t channelMapCap);
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MA_API ma_result ma_libvorbis_get_cursor_in_pcm_frames(ma_libvorbis* pVorbis, ma_uint64* pCursor);
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MA_API ma_result ma_libvorbis_get_length_in_pcm_frames(ma_libvorbis* pVorbis, 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_libvorbis_ds_read(ma_data_source* pDataSource, void* pFramesOut, ma_uint64 frameCount, ma_uint64* pFramesRead)
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{
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return ma_libvorbis_read_pcm_frames((ma_libvorbis*)pDataSource, pFramesOut, frameCount, pFramesRead);
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}
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static ma_result ma_libvorbis_ds_seek(ma_data_source* pDataSource, ma_uint64 frameIndex)
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{
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return ma_libvorbis_seek_to_pcm_frame((ma_libvorbis*)pDataSource, frameIndex);
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}
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static ma_result ma_libvorbis_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_libvorbis_get_data_format((ma_libvorbis*)pDataSource, pFormat, pChannels, pSampleRate, pChannelMap, channelMapCap);
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}
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static ma_result ma_libvorbis_ds_get_cursor(ma_data_source* pDataSource, ma_uint64* pCursor)
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{
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return ma_libvorbis_get_cursor_in_pcm_frames((ma_libvorbis*)pDataSource, pCursor);
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}
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static ma_result ma_libvorbis_ds_get_length(ma_data_source* pDataSource, ma_uint64* pLength)
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{
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return ma_libvorbis_get_length_in_pcm_frames((ma_libvorbis*)pDataSource, pLength);
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}
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static ma_data_source_vtable g_ma_libvorbis_ds_vtable =
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{
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ma_libvorbis_ds_read,
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ma_libvorbis_ds_seek,
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ma_libvorbis_ds_get_data_format,
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ma_libvorbis_ds_get_cursor,
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ma_libvorbis_ds_get_length
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};
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#if !defined(MA_NO_LIBVORBIS)
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static size_t ma_libvorbis_vf_callback__read(void* pBufferOut, size_t size, size_t count, void* pUserData)
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{
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ma_libvorbis* pVorbis = (ma_libvorbis*)pUserData;
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ma_result result;
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size_t bytesToRead;
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size_t bytesRead;
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/* For consistency with fread(). If `size` of `count` is 0, return 0 immediately without changing anything. */
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if (size == 0 || count == 0) {
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return 0;
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}
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bytesToRead = size * count;
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result = pVorbis->onRead(pVorbis->pReadSeekTellUserData, pBufferOut, bytesToRead, &bytesRead);
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if (result != MA_SUCCESS) {
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/* Not entirely sure what to return here. What if an error occurs, but some data was read and bytesRead is > 0? */
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return 0;
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}
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return bytesRead / size;
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}
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static int ma_libvorbis_vf_callback__seek(void* pUserData, ogg_int64_t offset, int whence)
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{
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ma_libvorbis* pVorbis = (ma_libvorbis*)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 = pVorbis->onSeek(pVorbis->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 long ma_libvorbis_vf_callback__tell(void* pUserData)
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{
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ma_libvorbis* pVorbis = (ma_libvorbis*)pUserData;
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ma_result result;
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ma_int64 cursor;
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result = pVorbis->onTell(pVorbis->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 (long)cursor;
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}
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#endif
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static ma_result ma_libvorbis_init_internal(const ma_decoding_backend_config* pConfig, ma_libvorbis* pVorbis)
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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 (pVorbis == NULL) {
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return MA_INVALID_ARGS;
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}
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MA_ZERO_OBJECT(pVorbis);
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pVorbis->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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pVorbis->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_libvorbis_ds_vtable;
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result = ma_data_source_init(&dataSourceConfig, &pVorbis->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_libvorbis_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_libvorbis* pVorbis)
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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 libvorbis. */
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result = ma_libvorbis_init_internal(pConfig, pVorbis);
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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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pVorbis->onRead = onRead;
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pVorbis->onSeek = onSeek;
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pVorbis->onTell = onTell;
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pVorbis->pReadSeekTellUserData = pReadSeekTellUserData;
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#if !defined(MA_NO_LIBVORBIS)
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{
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int libvorbisResult;
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ov_callbacks libvorbisCallbacks;
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/* We can now initialize the vorbis decoder. This must be done after we've set up the callbacks. */
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libvorbisCallbacks.read_func = ma_libvorbis_vf_callback__read;
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libvorbisCallbacks.seek_func = ma_libvorbis_vf_callback__seek;
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libvorbisCallbacks.close_func = NULL;
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libvorbisCallbacks.tell_func = ma_libvorbis_vf_callback__tell;
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libvorbisResult = ov_open_callbacks(pVorbis, &pVorbis->vf, NULL, 0, libvorbisCallbacks);
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if (libvorbisResult < 0) {
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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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/* libvorbis 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_libvorbis_init_file(const char* pFilePath, const ma_decoding_backend_config* pConfig, const ma_allocation_callbacks* pAllocationCallbacks, ma_libvorbis* pVorbis)
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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 libvorbis. */
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result = ma_libvorbis_init_internal(pConfig, pVorbis);
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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_LIBVORBIS)
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{
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int libvorbisResult;
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libvorbisResult = ov_fopen(pFilePath, &pVorbis->vf);
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if (libvorbisResult < 0) {
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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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/* libvorbis 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_libvorbis_uninit(ma_libvorbis* pVorbis, const ma_allocation_callbacks* pAllocationCallbacks)
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{
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if (pVorbis == NULL) {
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return;
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}
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(void)pAllocationCallbacks;
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#if !defined(MA_NO_LIBVORBIS)
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{
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ov_clear(&pVorbis->vf);
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}
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#else
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{
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/* libvorbis 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(&pVorbis->ds);
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}
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MA_API ma_result ma_libvorbis_read_pcm_frames(ma_libvorbis* pVorbis, 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 (pVorbis == NULL) {
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return MA_INVALID_ARGS;
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}
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#if !defined(MA_NO_LIBVORBIS)
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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_libvorbis_get_data_format(pVorbis, &format, &channels, NULL, NULL, 0);
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totalFramesRead = 0;
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while (totalFramesRead < frameCount) {
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long libvorbisResult;
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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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float** ppFramesF32;
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libvorbisResult = ov_read_float(&pVorbis->vf, &ppFramesF32, framesToRead, NULL);
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if (libvorbisResult < 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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/* Frames need to be interleaved. */
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ma_interleave_pcm_frames(format, channels, libvorbisResult, (const void**)ppFramesF32, ma_offset_pcm_frames_ptr(pFramesOut, totalFramesRead, format, channels));
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totalFramesRead += libvorbisResult;
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if (libvorbisResult == 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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} else {
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libvorbisResult = ov_read(&pVorbis->vf, ma_offset_pcm_frames_ptr(pFramesOut, totalFramesRead, format, channels), framesToRead * ma_get_bytes_per_frame(format, channels), 0, 2, 1, NULL);
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if (libvorbisResult < 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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/* Conveniently, there's no need to interleaving when using ov_read(). I'm not sure why ov_read_float() is different in that regard... */
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totalFramesRead += libvorbisResult / ma_get_bytes_per_frame(format, channels);
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if (libvorbisResult == 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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}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pFramesRead != NULL) {
|
||
|
|
*pFramesRead = totalFramesRead;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (result == MA_SUCCESS && totalFramesRead == 0) {
|
||
|
|
result = MA_AT_END;
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
{
|
||
|
|
/* libvorbis is disabled. Should never hit this since initialization would have failed. */
|
||
|
|
MA_ASSERT(MA_FALSE);
|
||
|
|
|
||
|
|
(void)pFramesOut;
|
||
|
|
(void)frameCount;
|
||
|
|
(void)pFramesRead;
|
||
|
|
|
||
|
|
return MA_NOT_IMPLEMENTED;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
MA_API ma_result ma_libvorbis_seek_to_pcm_frame(ma_libvorbis* pVorbis, ma_uint64 frameIndex)
|
||
|
|
{
|
||
|
|
if (pVorbis == NULL) {
|
||
|
|
return MA_INVALID_ARGS;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if !defined(MA_NO_LIBVORBIS)
|
||
|
|
{
|
||
|
|
int libvorbisResult = ov_pcm_seek(&pVorbis->vf, (ogg_int64_t)frameIndex);
|
||
|
|
if (libvorbisResult != 0) {
|
||
|
|
if (libvorbisResult == OV_ENOSEEK) {
|
||
|
|
return MA_INVALID_OPERATION; /* Not seekable. */
|
||
|
|
} else if (libvorbisResult == OV_EINVAL) {
|
||
|
|
return MA_INVALID_ARGS;
|
||
|
|
} else {
|
||
|
|
return MA_ERROR;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return MA_SUCCESS;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
{
|
||
|
|
/* libvorbis 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_libvorbis_get_data_format(ma_libvorbis* pVorbis, 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 (pVorbis == NULL) {
|
||
|
|
return MA_INVALID_OPERATION;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pFormat != NULL) {
|
||
|
|
*pFormat = pVorbis->format;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if !defined(MA_NO_LIBVORBIS)
|
||
|
|
{
|
||
|
|
vorbis_info* pInfo = ov_info(&pVorbis->vf, 0);
|
||
|
|
if (pInfo == NULL) {
|
||
|
|
return MA_INVALID_OPERATION;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pChannels != NULL) {
|
||
|
|
*pChannels = pInfo->channels;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pSampleRate != NULL) {
|
||
|
|
*pSampleRate = pInfo->rate;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pChannelMap != NULL) {
|
||
|
|
ma_channel_map_init_standard(ma_standard_channel_map_vorbis, pChannelMap, channelMapCap, pInfo->channels);
|
||
|
|
}
|
||
|
|
|
||
|
|
return MA_SUCCESS;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
{
|
||
|
|
/* libvorbis 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_libvorbis_get_cursor_in_pcm_frames(ma_libvorbis* pVorbis, ma_uint64* pCursor)
|
||
|
|
{
|
||
|
|
if (pCursor == NULL) {
|
||
|
|
return MA_INVALID_ARGS;
|
||
|
|
}
|
||
|
|
|
||
|
|
*pCursor = 0; /* Safety. */
|
||
|
|
|
||
|
|
if (pVorbis == NULL) {
|
||
|
|
return MA_INVALID_ARGS;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if !defined(MA_NO_LIBVORBIS)
|
||
|
|
{
|
||
|
|
ogg_int64_t offset = ov_pcm_tell(&pVorbis->vf);
|
||
|
|
if (offset < 0) {
|
||
|
|
return MA_INVALID_FILE;
|
||
|
|
}
|
||
|
|
|
||
|
|
*pCursor = (ma_uint64)offset;
|
||
|
|
|
||
|
|
return MA_SUCCESS;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
{
|
||
|
|
/* libvorbis 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_libvorbis_get_length_in_pcm_frames(ma_libvorbis* pVorbis, ma_uint64* pLength)
|
||
|
|
{
|
||
|
|
if (pLength == NULL) {
|
||
|
|
return MA_INVALID_ARGS;
|
||
|
|
}
|
||
|
|
|
||
|
|
*pLength = 0; /* Safety. */
|
||
|
|
|
||
|
|
if (pVorbis == NULL) {
|
||
|
|
return MA_INVALID_ARGS;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if !defined(MA_NO_LIBVORBIS)
|
||
|
|
{
|
||
|
|
/* I don't know how to reliably retrieve the length in frames using libvorbis, so returning 0 for now. */
|
||
|
|
*pLength = 0;
|
||
|
|
|
||
|
|
return MA_SUCCESS;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
{
|
||
|
|
/* libvorbis is disabled. Should never hit this since initialization would have failed. */
|
||
|
|
MA_ASSERT(MA_FALSE);
|
||
|
|
return MA_NOT_IMPLEMENTED;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|