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BGM modding: Add Ogg Vorbis support. [V]
Was that a typo in xiph/vorbis@89f651f? 👀 Staying one commit below that for now, who knows how to *actually* report bugs to a Xiph.org project… Funded by Splashman.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| /** | ||
| * Touhou Community Reliant Automatic Patcher | ||
| * BGM modding library for games using uncompressed PCM music | ||
| * | ||
| * ---- | ||
| * | ||
| * Ogg Vorbis support. | ||
| */ | ||
|
|
||
| #include <thcrap.h> | ||
| #include "bgmmod.hpp" | ||
|
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||
| #define OV_EXCLUDE_STATIC_CALLBACKS | ||
| #include <vorbis/vorbisfile.h> | ||
|
|
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| #pragma comment(lib, "libogg" DEBUG_OR_RELEASE) | ||
| #pragma comment(lib, "libvorbis" DEBUG_OR_RELEASE) | ||
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| #define vorbis_errorf(text, ...) \ | ||
| bgmmod_format_errorf("Ogg Vorbis", text, ##__VA_ARGS__) | ||
|
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||
| /// Callbacks | ||
| /// --------- | ||
| size_t ov_w32_read(void* dst, size_t elmsize, size_t count, HANDLE file) | ||
| { | ||
| DWORD byte_ret; | ||
| ReadFile(file, dst, elmsize * count, &byte_ret, nullptr); | ||
| return byte_ret; | ||
| } | ||
|
|
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| int ov_w32_seek(HANDLE file, ogg_int64_t bytes, int org) | ||
| { | ||
| return SetFilePointer(file, (LONG)bytes, nullptr, org) != 0xFFFFFFFF; | ||
| } | ||
|
|
||
| int ov_w32_close(HANDLE file) | ||
| { | ||
| return CloseHandle(file); | ||
| } | ||
|
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| long ov_w32_tell(HANDLE file) | ||
| { | ||
| return SetFilePointer(file, 0, 0, FILE_CURRENT); | ||
| } | ||
|
|
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| const ov_callbacks OV_CALLBACKS_WIN32 = { | ||
| ov_w32_read, ov_w32_seek, ov_w32_close, ov_w32_tell | ||
| }; | ||
| /// --------- | ||
|
|
||
| /// libvorbis extensions | ||
| /// -------------------- | ||
| const char* ov_strerror(int ret) | ||
| { | ||
| // Adapted from doc/libvorbis/return.html. | ||
| switch(ret) { | ||
| // Despite what the documentation says, this one actually *can* be | ||
| // unrecoverable. | ||
| case OV_HOLE: return "Missing or corrupt data in the bitstream"; | ||
| case OV_EREAD: return "Read error while fetching compressed data for decode"; | ||
| case OV_EFAULT: return "Internal inconsistency in encode or decode state. Continuing is likely not possible."; | ||
| case OV_EIMPL: return "Feature not implemented"; | ||
| case OV_EINVAL: return "Invalid argument was passed to a call"; | ||
| case OV_ENOTVORBIS: return "The given file was not recognized as Ogg Vorbis data."; | ||
| case OV_EBADHEADER: return "The file is apparently an Ogg Vorbis stream, but contains a corrupted or undecipherable header."; | ||
| case OV_EVERSION: return "The bitstream format revision of the given file is not supported."; | ||
| case OV_EBADLINK:return "The given link exists in the Vorbis data stream, but is not decipherable due to garbage or corruption."; | ||
| case OV_ENOSEEK: return "File is not seekable"; | ||
| default: | ||
| return ""; | ||
| } | ||
| } | ||
| /// -------------------- | ||
|
|
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| struct vorbis_part_t : public pcm_part_t { | ||
| OggVorbis_File vf; | ||
|
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| size_t part_decode(void *buf, size_t size); | ||
| void part_seek_to_sample(size_t sample); | ||
|
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| vorbis_part_t(OggVorbis_File &&vf, pcm_format_t pcmf, size_t part_bytes) | ||
| : vf(vf), pcm_part_t(pcmf, part_bytes) { | ||
| }; | ||
| virtual ~vorbis_part_t(); | ||
| }; | ||
|
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| size_t vorbis_part_t::part_decode(void *buf, size_t size) | ||
| { | ||
| auto ret = ov_read(&vf, (char *)buf, size, 0, 2, 1, nullptr); | ||
| if(ret < 0) { | ||
| vorbis_errorf( | ||
| "Error %d at sample %lld: %s", | ||
| ret, ov_pcm_tell(&vf), ov_strerror(ret) | ||
| ); | ||
| return -1; | ||
| } | ||
| return ret; | ||
| } | ||
|
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| void vorbis_part_t::part_seek_to_sample(size_t sample) | ||
| { | ||
| auto ret = ov_pcm_seek(&vf, sample); | ||
| assert(ret == 0); | ||
| } | ||
|
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| vorbis_part_t::~vorbis_part_t() | ||
| { | ||
| ov_clear(&vf); | ||
| } | ||
|
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| std::unique_ptr<pcm_part_t> vorbis_open(HANDLE &&stream) | ||
| { | ||
| OggVorbis_File vf = { 0 }; | ||
|
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| auto fail = [&] (int ret) { | ||
| vorbis_errorf("%s", ov_strerror(ret)); | ||
| ov_clear(&vf); | ||
| return nullptr; | ||
| }; | ||
|
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| auto ret = ov_open_callbacks(stream, &vf, nullptr, 0, OV_CALLBACKS_WIN32); | ||
| if(ret) { | ||
| return fail(ret); | ||
| } | ||
|
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| auto sample_length = ov_pcm_total(&vf, -1); | ||
| if(sample_length < 0) { | ||
| // The regularly returned error would be OV_EINVAL... | ||
| return fail(OV_ENOSEEK); | ||
| } | ||
|
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| assert(vf.vi); | ||
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| pcm_format_t pcmf{ (uint32_t)vf.vi->rate, 16, vf.vi->channels }; | ||
| auto bits_per_sample = (pcmf.bitdepth / 8) * pcmf.channels; | ||
| auto byte_size = (size_t)(sample_length * bits_per_sample); | ||
|
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| return std::make_unique<vorbis_part_t>(std::move(vf), pcmf, byte_size); | ||
| } |
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