diff options
Diffstat (limited to 'buffer.h')
| -rw-r--r-- | buffer.h | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/buffer.h b/buffer.h new file mode 100644 index 0000000..5bf635e --- /dev/null +++ b/buffer.h @@ -0,0 +1,192 @@ +#ifndef BUFFER_H +#define BUFFER_H + +#include <inttypes.h> +#include <qobject.h> +#include <qlistbox.h> + +#include "sound.h" + +/* ---------------------------------------------------------------------- */ +/* *.wav I/O stolen from cdda2wav */ + +/* Copyright (C) by Heiko Eissfeldt */ + +typedef uint8_t BYTE; +typedef uint16_t WORD; +typedef uint32_t DWORD; +typedef uint32_t FOURCC; /* a four character code */ + +/* flags for 'wFormatTag' field of WAVEFORMAT */ +#define WAVE_FORMAT_PCM 1 + +/* MMIO macros */ +#define mmioFOURCC(ch0, ch1, ch2, ch3) \ + ((DWORD)(BYTE)(ch0) | ((DWORD)(BYTE)(ch1) << 8) | \ + ((DWORD)(BYTE)(ch2) << 16) | ((DWORD)(BYTE)(ch3) << 24)) + +#define FOURCC_RIFF mmioFOURCC ('R', 'I', 'F', 'F') +#define FOURCC_LIST mmioFOURCC ('L', 'I', 'S', 'T') +#define FOURCC_WAVE mmioFOURCC ('W', 'A', 'V', 'E') +#define FOURCC_FMT mmioFOURCC ('f', 'm', 't', ' ') +#define FOURCC_DATA mmioFOURCC ('d', 'a', 't', 'a') + +typedef struct CHUNKHDR { + FOURCC ckid; /* chunk ID */ + DWORD dwSize; /* chunk size */ +} CHUNKHDR; + +/* simplified Header for standard WAV files */ +typedef struct WAVEHDR { + CHUNKHDR chkRiff; + FOURCC fccWave; + CHUNKHDR chkFmt; + WORD wFormatTag; /* format type */ + WORD nChannels; /* number of channels (i.e. mono, stereo, etc.) */ + DWORD nSamplesPerSec; /* sample rate */ + DWORD nAvgBytesPerSec; /* for buffer estimation */ + WORD nBlockAlign; /* block size of data */ + WORD wBitsPerSample; + CHUNKHDR chkData; +} WAVEHDR; + +#define IS_STD_WAV_HEADER(waveHdr) ( \ + waveHdr.chkRiff.ckid == FOURCC_RIFF && \ + waveHdr.fccWave == FOURCC_WAVE && \ + waveHdr.chkFmt.ckid == FOURCC_FMT && \ + waveHdr.chkData.ckid == FOURCC_DATA && \ + waveHdr.wFormatTag == WAVE_FORMAT_PCM) + +/* ---------------------------------------------------------------------- */ + +class AudioBuffer { + +protected: + struct SOUNDPARAMS params; + int size; + int busy; + int position; + +public: + AudioBuffer(); + virtual ~AudioBuffer(); + + int clippedsamples; + int is_busy(); + void balloc(void); + void bfree(void); + + virtual int start_write(struct SOUNDPARAMS *p); /* write */ + virtual void stop_write(); /* can flush etc. */ + + virtual struct SOUNDPARAMS *get_params(); /* after recording or */ + virtual int get_size(); /* for file readling */ + virtual char *name(); + + virtual void *read_audio(int len); /* no comment ... */ + virtual int write_audio(int len, void *data); + virtual int seek(int pos); + virtual int tell(); +}; + +class RAMBuffer : public AudioBuffer { +private: + char **buffers; + int bufcount; + char bufname[32]; + +public: + RAMBuffer(); + virtual ~RAMBuffer(); + + virtual int start_write(struct SOUNDPARAMS *p); + virtual void stop_write(); + + virtual struct SOUNDPARAMS *get_params(); + virtual int get_size(); + virtual char *name(); + + virtual void *read_audio(int len); + virtual int write_audio(int len, void *data); + virtual int seek(int pos); + virtual int tell(); +}; + +class FileBuffer : public AudioBuffer { +private: + int fd,ro; + int offset,bstart,bstop; + char filename[256]; + WAVEHDR fileheader; + char buffer[65536]; + + void init_header(); + int parse_header(); + +public: + FileBuffer(); + virtual ~FileBuffer(); + + int attach(const char *file); + + virtual int start_write(struct SOUNDPARAMS *p); + virtual void stop_write(); + + virtual struct SOUNDPARAMS *get_params(); + virtual int get_size(); + virtual char *name(); + + virtual void *read_audio(int len); + virtual int write_audio(int len, void *data); + virtual int seek(int pos); + virtual int tell(); +}; + +/* -- functions -------------------------------------------------------- */ + +class BufferList : public QObject { + Q_OBJECT; + +public: + BufferList(QListBox *l, Soundcard *c); + int add_filebuffer(const char *filename); + void save_buf(const char *filename); + +private: + QListBox *listbox; + Soundcard *card; + int mon,level,wait; + + struct SOUNDPARAMS params; + AudioBuffer **buffers; + int count,brecord,bplayback; + int new_buffer_count; + + int add_rambuffer(); + void add_buffer(AudioBuffer *buf); + void label_buffer(int buf); + void del_buffer(int buf); + void istop(); + void set_pos_size(const char *start, int buf); + +public slots: + void new_params(struct SOUNDPARAMS *params); + void new_data(void *data); + void post_data(void *data); + + void new_ram(); + void del_buf(); + void set_level(int l); + void monitor(); + void record(); + void stop(); + void play(); + void forward(); + void backward(); + void next_buffer(); + +signals: + void status(const char *text); +}; + +#endif |