From: Yuxuan Shui yshui@codeweavers.com
--- dlls/dmime/Makefile.in | 1 + dlls/dmime/dmime_private.h | 6 +++ dlls/dmime/midi.c | 105 +++++++++++++++++++++++++++++++++++++ dlls/dmime/segment.c | 16 +++++- 4 files changed, 127 insertions(+), 1 deletion(-) create mode 100644 dlls/dmime/midi.c
diff --git a/dlls/dmime/Makefile.in b/dlls/dmime/Makefile.in index cf041ef2b27..f8f622f8f3d 100644 --- a/dlls/dmime/Makefile.in +++ b/dlls/dmime/Makefile.in @@ -10,6 +10,7 @@ SOURCES = \ graph.c \ lyricstrack.c \ markertrack.c \ + midi.c \ paramcontroltrack.c \ performance.c \ segment.c \ diff --git a/dlls/dmime/dmime_private.h b/dlls/dmime/dmime_private.h index 96ccd5daf8b..0a8390d85f2 100644 --- a/dlls/dmime/dmime_private.h +++ b/dlls/dmime/dmime_private.h @@ -48,6 +48,7 @@ * Interfaces */ typedef struct IDirectMusicAudioPathImpl IDirectMusicAudioPathImpl; +struct midi_parser;
/***************************************************************************** * ClassFactory @@ -68,6 +69,11 @@ extern HRESULT create_dmsysextrack(REFIID riid, void **ret_iface); extern HRESULT create_dmtempotrack(REFIID riid, void **ret_iface); extern HRESULT create_dmtimesigtrack(REFIID riid, void **ret_iface); extern HRESULT create_dmwavetrack(REFIID riid, void **ret_iface); +/* Create a new MIDI file parser. Note the stream might still be modified even + * when this function fails. */ +extern HRESULT midi_parser_new(IStream *stream, struct midi_parser **out_parser); +extern HRESULT midi_parser_next_track(struct midi_parser *parser, IDirectMusicTrack **out_track, MUSIC_TIME *out_length); +extern void midi_parser_destroy(struct midi_parser *parser);
extern void set_audiopath_perf_pointer(IDirectMusicAudioPath*,IDirectMusicPerformance8*); extern void set_audiopath_dsound_buffer(IDirectMusicAudioPath*,IDirectSoundBuffer*); diff --git a/dlls/dmime/midi.c b/dlls/dmime/midi.c new file mode 100644 index 00000000000..a7e57947c6f --- /dev/null +++ b/dlls/dmime/midi.c @@ -0,0 +1,105 @@ +/* + * Copyright (C) 2024 Yuxuan Shui for CodeWeavers + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA + */ + +#include "dmime_private.h" +#include "winternl.h" + +WINE_DEFAULT_DEBUG_CHANNEL(dmime); + +#ifdef WORDS_BIGENDIAN +#define GET_BE_WORD(x) (x) +#define GET_BE_DWORD(x) (x) +#else +#define GET_BE_WORD(x) RtlUshortByteSwap(x) +#define GET_BE_DWORD(x) RtlUlongByteSwap(x) +#endif + +struct midi_parser +{ + IStream *stream; +}; + +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); + return S_FALSE; +} + +HRESULT midi_parser_new(IStream *stream, struct midi_parser **out_parser) +{ + LARGE_INTEGER offset; + DWORD length; + HRESULT hr; + WORD format, number_of_tracks, division; + struct midi_parser *parser; + + *out_parser = NULL; + + /* Skip over the 'MThd' magic number. */ + offset.QuadPart = 4; + if (FAILED(hr = IStream_Seek(stream, offset, STREAM_SEEK_SET, NULL))) return hr; + + if (FAILED(hr = IStream_Read(stream, &length, sizeof(length), NULL))) return hr; + length = GET_BE_DWORD(length); + if (length != 6) + { + WARN("Invalid MIDI header length %lu\n", length); + return DMUS_E_UNSUPPORTED_STREAM; + } + + if (FAILED(hr = IStream_Read(stream, &format, sizeof(format), NULL))) return hr; + format = GET_BE_WORD(format); + if (format > 2) + { + WARN("Invalid MIDI format %u\n", format); + return DMUS_E_UNSUPPORTED_STREAM; + } + if (format == 2) + { + FIXME("MIDI format 2 not implemented yet\n"); + return DMUS_E_UNSUPPORTED_STREAM; + } + + if (FAILED(hr = IStream_Read(stream, &number_of_tracks, sizeof(number_of_tracks), NULL))) + return hr; + + number_of_tracks = GET_BE_WORD(number_of_tracks); + if (FAILED(hr = IStream_Read(stream, &division, sizeof(division), NULL))) return hr; + division = GET_BE_WORD(division); + if (division & 0x8000) + { + WARN("SMPTE time division not implemented yet\n"); + return DMUS_E_UNSUPPORTED_STREAM; + } + + TRACE("MIDI format %u, %u tracks, division %u\n", format, number_of_tracks, division); + + parser = calloc(1, sizeof(struct midi_parser)); + if (!parser) return E_OUTOFMEMORY; + parser->stream = stream; + IStream_AddRef(stream); + *out_parser = parser; + + return hr; +} + +void midi_parser_destroy(struct midi_parser *parser) +{ + IStream_Release(parser->stream); + free(parser); +} diff --git a/dlls/dmime/segment.c b/dlls/dmime/segment.c index b208f89148c..82e06f4537d 100644 --- a/dlls/dmime/segment.c +++ b/dlls/dmime/segment.c @@ -791,7 +791,10 @@ static inline struct segment *impl_from_IPersistStream(IPersistStream *iface) static HRESULT WINAPI segment_persist_stream_Load(IPersistStream *iface, IStream *stream) { struct segment *This = impl_from_IPersistStream(iface); + IDirectMusicTrack *track; + MUSIC_TIME length; struct chunk_entry chunk = {0}; + struct midi_parser *midi_parser; HRESULT hr;
TRACE("(%p, %p): Loading\n", This, stream); @@ -807,7 +810,18 @@ static HRESULT WINAPI segment_persist_stream_Load(IPersistStream *iface, IStream break;
case mmioFOURCC('M','T','h','d'): - FIXME("MIDI file loading not supported\n"); + hr = midi_parser_new(stream, &midi_parser); + if (FAILED(hr)) break; + This->header.mtLength = 0; + while ((hr = midi_parser_next_track(midi_parser, &track, &length)) == S_OK) + { + hr = segment_append_track(This, track, 1, 0); + IDirectMusicTrack_Release(track); + if (FAILED(hr)) break; + if (length > This->header.mtLength) + This->header.mtLength = length; + } + midi_parser_destroy(midi_parser); break;
case MAKE_IDTYPE(FOURCC_RIFF, mmioFOURCC('W','A','V','E')):