From: Yuxuan Shui yshui@codeweavers.com
--- dlls/dmime/midi.c | 236 ++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 228 insertions(+), 8 deletions(-)
diff --git a/dlls/dmime/midi.c b/dlls/dmime/midi.c index 877c3cfbb91..d7147d867b3 100644 --- a/dlls/dmime/midi.c +++ b/dlls/dmime/midi.c @@ -29,11 +29,68 @@ WINE_DEFAULT_DEBUG_CHANNEL(dmime); #define GET_BE_DWORD(x) RtlUlongByteSwap(x) #endif
+union event_data +{ + struct + { + BYTE byte[5]; + } fixed; + UINT integer; +}; + +enum meta_event_type +{ + MIDI_META_SEQUENCE_NUMBER = 0x00, + MIDI_META_TEXT_EVENT = 0x01, + MIDI_META_COPYRIGHT_NOTICE = 0x02, + MIDI_META_TRACK_NAME = 0x03, + MIDI_META_INSTRUMENT_NAME = 0x04, + MIDI_META_LYRIC = 0x05, + MIDI_META_MARKER = 0x06, + MIDI_META_CUE_POINT = 0x07, + MIDI_META_CHANNEL_PREFIX_ASSIGNMENT = 0x20, + MIDI_META_END_OF_TRACK = 0x2f, + MIDI_META_SET_TEMPO = 0x51, + MIDI_META_SMPTE_OFFSET = 0x54, + MIDI_META_TIME_SIGNATURE = 0x58, + MIDI_META_KEY_SIGNATURE = 0x59, + MIDI_META_SEQUENCER_SPECIFIC = 0x7f, +}; + +struct event +{ + struct list entry; + DWORD deltaTime; + BYTE status; + /* type of meta events. */ + enum meta_event_type type; + union event_data data; +}; + struct midi_sequence_track { IDirectMusicTrack8 IDirectMusicTrack8_iface; struct dmobject dmobj; /* IPersistStream only */ LONG ref; + + /* MIDI deltaTime can be either tempo dependent or not. If + * ticks_per_quarter_note is 0, then ticks_per_second should be used. + * Converting MIDI time to DirectMusic MUSIC_TIME is complicated. MUSIC_TIME + * is number of quarter notes times DMUS_PPQ, this is tempo dependent. If + * MIDI time is tempo dependent as well, then we just need to multiply it by + * a factor (because MIDI can have a different division of quarter notes). + * + * If MIDI time is not tempo dependent however, the conversion would be + * difficult because tempo information can be stored in another track. And + * we need the tempo information to convert MIDI time to MUSIC_TIME. The + * only reasonable way to do this is to report a "fake", fixed tempo, which + * makes MUSIC_TIME and MIDI time the same. + */ + UINT ticks_per_quarter_note; + UINT ticks_per_second; + UINT event_count; + + struct list events; };
static inline struct midi_sequence_track *impl_from_IDirectMusicTrack8(IDirectMusicTrack8 *iface) @@ -77,11 +134,20 @@ static ULONG WINAPI midi_sequence_track_AddRef(IDirectMusicTrack8 *iface) static ULONG WINAPI midi_sequence_track_Release(IDirectMusicTrack8 *iface) { struct midi_sequence_track *This = impl_from_IDirectMusicTrack8(iface); + struct event *event, *next_event; ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p): %lu\n", This, ref);
- if (!ref) free(This); + if (!ref) + { + LIST_FOR_EACH_ENTRY_SAFE(event, next_event, &This->events, struct event, entry) + { + list_remove(&event->entry); + free(event); + } + free(This); + }
return ref; } @@ -247,12 +313,128 @@ static inline struct midi_sequence_track *impl_from_IPersistStream(IPersistStrea return CONTAINING_RECORD(iface, struct midi_sequence_track, dmobj.IPersistStream_iface); }
-static HRESULT WINAPI track_IPersistStream_Load(IPersistStream *iface, IStream *stream) +static HRESULT read_variable_length_number(IStream *stream, DWORD *out) +{ + BYTE byte; + HRESULT hr = S_OK; + + *out = 0; + do + { + hr = IStream_Read(stream, &byte, 1, NULL); + if (hr != S_OK) break; + + *out = (*out << 7) | (byte & 0x7f); + } while (byte & 0x80); + return hr; +} + +static HRESULT read_midi_event(IStream *stream, struct event *event, BYTE last_status) +{ + BYTE byte; + BYTE status_type; + DWORD length; + LARGE_INTEGER offset; + HRESULT hr = S_OK; + + hr = read_variable_length_number(stream, &event->deltaTime); + if (hr != S_OK) return hr; + + hr = IStream_Read(stream, &byte, 1, NULL); + if (hr != S_OK) return hr; + + if (byte & 0x80) event->status = byte; + else event->status = last_status; /* MIDI running status */ + + if (event->status == 0xff) + { + hr = IStream_Read(stream, &byte, 1, NULL); + if (hr != S_OK) return hr; + event->type = byte; + + hr = read_variable_length_number(stream, &length); + if (hr != S_OK) return hr; + + switch (event->type) + { + case MIDI_META_END_OF_TRACK: + if (length != 0) + { + ERR("Invalid MIDI meta event length %lu for end of track event.\n", length); + return E_FAIL; + } + break; + default: + offset.QuadPart = length; + if (FAILED(hr = IStream_Seek(stream, offset, STREAM_SEEK_CUR, NULL))) return hr; + FIXME("MIDI meta event type %#02x, length %lu, time +%lu. not supported\n", event->type, + length, event->deltaTime); + } + TRACE("MIDI meta event type %#02x, length %lu, time +%lu\n", event->type, length, event->deltaTime); + } + else if (event->status == 0xf0 || event->status == 0xf7) + { + hr = read_variable_length_number(stream, &length); + if (hr != S_OK) return hr; + + offset.QuadPart = length; + if (FAILED(hr = IStream_Seek(stream, offset, STREAM_SEEK_CUR, NULL))) return hr; + FIXME("MIDI sysex event type %#02x, length %lu, time +%lu. not supported\n", event->status, + length, event->deltaTime); + } + else + { + status_type = event->status & 0xf0; + hr = IStream_Read(stream, &event->data.fixed.byte[0], 1, NULL); + if (hr == S_OK && status_type != 0xc0 && status_type != 0xd0) + hr = IStream_Read(stream, &event->data.fixed.byte[1], 1, NULL); + TRACE("MIDI event status %#02x, data1 %#02x, data2 %#02x, time +%lu\n", event->status, + event->data.fixed.byte[0], event->data.fixed.byte[1], event->deltaTime); + } + + return hr; +} + +static HRESULT WINAPI midi_sequence_track_IPersistStream_Load(IPersistStream *iface, IStream *stream) { struct midi_sequence_track *This = impl_from_IPersistStream(iface); + struct event *event = NULL; + DWORD magic, length; + BYTE last_status = 0; + BOOL is_end_of_track = FALSE; + HRESULT hr;
TRACE("(%p, %p): stub\n", This, stream); - return S_OK; + + hr = IStream_Read(stream, &magic, sizeof(magic), NULL); + if (FAILED(hr)) return hr; + if (magic != MAKEFOURCC('M', 'T', 'r', 'k')) + { + WARN("Invalid MIDI track magic number %s\n", debugstr_fourcc(magic)); + return DMUS_E_UNSUPPORTED_STREAM; + } + + hr = IStream_Read(stream, &length, sizeof(length), NULL); + if (FAILED(hr)) return hr; + length = GET_BE_DWORD(length); + TRACE("MIDI track length %lu\n", length); + + while (!is_end_of_track) + { + if (!(event = calloc(1, sizeof(*event)))) return E_OUTOFMEMORY; + + if ((hr = read_midi_event(stream, event, last_status)) != S_OK) + { + free(event); + break; + } + list_add_tail(&This->events, &event->entry); + This->event_count++; + last_status = event->status; + is_end_of_track = event->status == 0xff && event->type == MIDI_META_END_OF_TRACK; + } + + return hr; }
static const IPersistStreamVtbl midi_sequence_track_persiststream_vtbl = @@ -262,12 +444,21 @@ static const IPersistStreamVtbl midi_sequence_track_persiststream_vtbl = dmobj_IPersistStream_Release, dmobj_IPersistStream_GetClassID, unimpl_IPersistStream_IsDirty, - track_IPersistStream_Load, + midi_sequence_track_IPersistStream_Load, unimpl_IPersistStream_Save, unimpl_IPersistStream_GetSizeMax, };
-HRESULT create_midiseqtrack(REFIID riid, void **ppobj) +static MUSIC_TIME midi_sequence_track_get_length(IDirectMusicTrack8 *iface) +{ + struct midi_sequence_track *This = impl_from_IDirectMusicTrack8(iface); + struct event *event; + MUSIC_TIME length = 0; + LIST_FOR_EACH_ENTRY(event, &This->events, struct event, entry) length += event->deltaTime; + return length; +} + +static HRESULT create_midiseqtrack(REFIID riid, void **ppobj, DWORD divison) { struct midi_sequence_track *track; HRESULT hr; @@ -278,6 +469,9 @@ HRESULT create_midiseqtrack(REFIID riid, void **ppobj) track->ref = 1; dmobject_init(&track->dmobj, &CLSID_DirectMusicSeqTrack, (IUnknown *)&track->IDirectMusicTrack8_iface); track->dmobj.IPersistStream_iface.lpVtbl = &midi_sequence_track_persiststream_vtbl; + track->ticks_per_quarter_note = divison; + + list_init(&track->events);
hr = IDirectMusicTrack8_QueryInterface(&track->IDirectMusicTrack8_iface, riid, ppobj); IDirectMusicTrack8_Release(&track->IDirectMusicTrack8_iface); @@ -288,16 +482,41 @@ HRESULT create_midiseqtrack(REFIID riid, void **ppobj) struct midi_parser { IStream *stream; + DWORD division; WORD number_of_tracks, current_track; };
HRESULT midi_parser_next_track(struct midi_parser *parser, IDirectMusicTrack **out_track, MUSIC_TIME *out_length) { - TRACE("(%p, %p, %p): stub\n", parser, out_track, out_length); + IPersistStream *pstream; + HRESULT hr; + MUSIC_TIME midi_length; + if (parser->current_track >= parser->number_of_tracks) return S_FALSE; - *out_length = 0; + + hr = create_midiseqtrack(&IID_IPersistStream, (void **)&pstream, parser->division); + if (FAILED(hr)) return hr; + + hr = IPersistStream_Load(pstream, parser->stream); + if (hr == S_FALSE) + { + WARN("Early end of stream while read MIDI track\n"); + hr = DMUS_E_INVALIDFILE; + } + if (FAILED(hr)) + { + IPersistStream_Release(pstream); + return hr; + } + + hr = IPersistStream_QueryInterface(pstream, &IID_IDirectMusicTrack, (void **)out_track); + IPersistStream_Release(pstream); + if (FAILED(hr)) return hr; + + midi_length = midi_sequence_track_get_length((IDirectMusicTrack8 *)*out_track); + *out_length = (LONGLONG)midi_length * DMUS_PPQ / parser->division; parser->current_track++; - return create_midiseqtrack(&IID_IDirectMusicTrack, (void **)out_track); + return S_OK; }
HRESULT midi_parser_new(IStream *stream, struct midi_parser **out_parser) @@ -352,6 +571,7 @@ HRESULT midi_parser_new(IStream *stream, struct midi_parser **out_parser) parser = calloc(1, sizeof(struct midi_parser)); if (!parser) return E_OUTOFMEMORY; parser->stream = stream; + parser->division = division; parser->number_of_tracks = number_of_tracks; IStream_AddRef(stream); *out_parser = parser;