music_mad.h
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上传日期:2022-07-21
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- /*
- SDL_mixer: An audio mixer library based on the SDL library
- Copyright (C) 1997-2009 Sam Lantinga
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
- This library 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
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Sam Lantinga
- slouken@libsdl.org
- */
- #ifdef MP3_MAD_MUSIC
- #include "mad.h"
- #include "SDL_rwops.h"
- #include "SDL_audio.h"
- #include "SDL_mixer.h"
- #define MAD_INPUT_BUFFER_SIZE (5*8192)
- #define MAD_OUTPUT_BUFFER_SIZE 8192
- enum {
- MS_input_eof = 0x0001,
- MS_input_error = 0x0001,
- MS_decode_eof = 0x0002,
- MS_decode_error = 0x0004,
- MS_error_flags = 0x000f,
- MS_playing = 0x0100,
- MS_cvt_decoded = 0x0200,
- };
- typedef struct {
- SDL_RWops *rw;
- SDL_bool freerw;
- struct mad_stream stream;
- struct mad_frame frame;
- struct mad_synth synth;
- int frames_read;
- mad_timer_t next_frame_start;
- int volume;
- int status;
- int output_begin, output_end;
- SDL_AudioSpec mixer;
- SDL_AudioCVT cvt;
- unsigned char input_buffer[MAD_INPUT_BUFFER_SIZE + MAD_BUFFER_GUARD];
- unsigned char output_buffer[MAD_OUTPUT_BUFFER_SIZE];
- } mad_data;
- mad_data *mad_openFile(const char *filename, SDL_AudioSpec *mixer);
- mad_data *mad_openFileRW(SDL_RWops *rw, SDL_AudioSpec *mixer);
- void mad_closeFile(mad_data *mp3_mad);
- void mad_start(mad_data *mp3_mad);
- void mad_stop(mad_data *mp3_mad);
- int mad_isPlaying(mad_data *mp3_mad);
- int mad_getSamples(mad_data *mp3_mad, Uint8 *stream, int len);
- void mad_seek(mad_data *mp3_mad, double position);
- void mad_setVolume(mad_data *mp3_mad, int volume);
- #endif