зеркало из https://github.com/mozilla/pjs.git
415 строки
13 KiB
C
415 строки
13 KiB
C
#ifndef foosydneyhfoo
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#define foosydneyhfoo
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/* Requirements:
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- In sync mode, the device will automatically write data so that an initial read causes writes
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of zeros to be issued to that one can do "while (1); {read(); write()}
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- All functions are thread-safe and can be called in any thread context. None of the functions is
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async-signal safe.
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- It is assumed that duplex streams have a single clock (synchronised)
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*/
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#include <sys/types.h>
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#if !defined (WIN32)
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#include <sys/param.h>
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#include <inttypes.h>
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#else
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#include <stddef.h>
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#endif
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/* Detect byte order, based on sys/param.h */
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#undef SA_LITTLE_ENDIAN
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#undef SA_BIG_ENDIAN
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#if defined(__BYTE_ORDER)
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# if __BYTE_ORDER == __LITTLE_ENDIAN
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# define SA_LITTLE_ENDIAN 1
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# elif __BYTE_ORDER == __BIG_ENDIAN
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# define SA_BIG_ENDIAN 1
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# endif
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#elif defined(WIN32)
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# define SA_LITTLE_ENDIAN 1
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#elif defined(__APPLE__)
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# if defined(__BIG_ENDIAN__)
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# define SA_BIG_ENDIAN 1
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# else
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# define SA_LITTLE_ENDIAN 1
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# endif
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#else
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# error "Cannot determine byte order!"
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#endif
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#if defined(WIN32)
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#if !defined(int32_t)
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typedef __int32 int32_t;
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#endif
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#if !defined(int64_t)
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typedef __int64 int64_t;
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#endif
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#endif
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typedef struct sa_stream sa_stream_t;
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#if defined(WIN32)
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// (left << 16 | right) (16 bits per channel)
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#define SA_VOLUME_MUTED ((int32_t) (0x00000000))
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#else
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/** Volume that corresponds to muted in/out */
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#define SA_VOLUME_MUTED ((int32_t) (-0x80000000))
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#endif
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/** Ways to express seek offsets for pread/pwrite */
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typedef enum {
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SA_SEEK_RELATIVE,
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SA_SEEK_ABSOLUTE,
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SA_SEEK_RELATIVE_END,
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_SA_SEEK_MAX
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} sa_seek_t;
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/** Supported formats */
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typedef enum {
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SA_PCM_FORMAT_U8,
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SA_PCM_FORMAT_ULAW,
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SA_PCM_FORMAT_ALAW,
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SA_PCM_FORMAT_S16_LE,
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SA_PCM_FORMAT_S16_BE,
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SA_PCM_FORMAT_S24_LE,
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SA_PCM_FORMAT_S24_BE,
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SA_PCM_FORMAT_S32_LE,
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SA_PCM_FORMAT_S32_BE,
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SA_PCM_FORMAT_FLOAT32_LE,
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SA_PCM_FORMAT_FLOAT32_BE,
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_SA_PCM_FORMAT_MAX
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} sa_pcm_format_t;
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/* Native/reverse endianness definitions for PCM */
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#ifdef SA_LITTLE_ENDIAN
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#define SA_PCM_FORMAT_S16_NE SA_PCM_FORMAT_S16_LE
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#define SA_PCM_FORMAT_S24_NE SA_PCM_FORMAT_S24_LE
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#define SA_PCM_FORMAT_S32_NE SA_PCM_FORMAT_S32_LE
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#define SA_PCM_FORMAT_FLOAT32_NE SA_PCM_FORMAT_FLOAT32_LE
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#define SA_PCM_FORMAT_S16_RE SA_PCM_FORMAT_S16_BE
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#define SA_PCM_FORMAT_S24_RE SA_PCM_FORMAT_S24_BE
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#define SA_PCM_FORMAT_S32_RE SA_PCM_FORMAT_S32_BE
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#define SA_PCM_FORMAT_FLOAT32_RE SA_PCM_FORMAT_FLOAT32_BE
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#else
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#define SA_PCM_FORMAT_S16_NE SA_PCM_FORMAT_S16_BE
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#define SA_PCM_FORMAT_S24_NE SA_PCM_FORMAT_S24_BE
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#define SA_PCM_FORMAT_S32_NE SA_PCM_FORMAT_S32_BE
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#define SA_PCM_FORMAT_FLOAT32_NE SA_PCM_FORMAT_FLOAT32_BE
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#define SA_PCM_FORMAT_S16_RE SA_PCM_FORMAT_S16_LE
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#define SA_PCM_FORMAT_S24_RE SA_PCM_FORMAT_S24_LE
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#define SA_PCM_FORMAT_S32_RE SA_PCM_FORMAT_S32_LE
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#define SA_PCM_FORMAT_FLOAT32_RE SA_PCM_FORMAT_FLOAT32_LE
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#endif
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#define SA_CODEC_MPEG "mpeg"
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#define SA_CODEC_AC3 "ac3"
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#define SA_CODEC_GSM "gsm"
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#define SA_CODEC_VORBIS "vorbis"
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#define SA_CODEC_SPEEX "speex"
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/** Device opening modes */
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typedef enum {
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SA_MODE_WRONLY = 1,
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SA_MODE_RDONLY = 2,
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SA_MODE_RDWR = 3,
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_SA_MODE_MAX = 4
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} sa_mode_t;
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/** Error codes */
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typedef enum {
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SA_SUCCESS = 0,
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SA_ERROR_NOT_SUPPORTED = -1,
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SA_ERROR_INVALID = -2,
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SA_ERROR_STATE = -3,
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SA_ERROR_OOM = -4,
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SA_ERROR_NO_DEVICE = -5,
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SA_ERROR_NO_DRIVER = -6,
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SA_ERROR_NO_CODEC = -7,
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SA_ERROR_NO_PCM_FORMAT = -7,
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SA_ERROR_SYSTEM = -8,
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SA_ERROR_NO_INIT = -9,
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SA_ERROR_NO_META = -10,
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SA_ERROR_NO_DATA = -11,
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SA_ERROR_NO_SPACE = -12,
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_SA_ERROR_MAX = -13
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} sa_error_t;
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/** Possible events for notifications */
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typedef enum {
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SA_NOTIFY_REQUEST_START,
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SA_NOTIFY_REQUEST_STOP,
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SA_NOTIFY_CHANGED_READ_VOLUME,
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SA_NOTIFY_CHANGED_WRITE_VOLUME,
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SA_NOTIFY_CHANGED_DEVICE,
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_SA_NOTIFY_MAX
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} sa_notify_t;
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/** Classes of events */
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typedef enum {
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SA_EVENT_REQUEST_IO,
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SA_EVENT_INIT_THREAD,
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SA_EVENT_NOTIFY,
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SA_EVENT_ERROR,
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_SA_EVENT_MAX
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} sa_event_t;
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/** List of sample position queries */
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typedef enum {
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SA_POSITION_WRITE_DELAY,
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SA_POSITION_WRITE_HARDWARE,
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SA_POSITION_WRITE_SOFTWARE,
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SA_POSITION_READ_DELAY,
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SA_POSITION_READ_HARDWARE,
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SA_POSITION_READ_SOFTWARE,
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SA_POSITION_DUPLEX_DELAY,
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_SA_POSITION_MAX
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} sa_position_t;
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/* Channel positions */
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typedef enum {
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SA_CHANNEL_MONO,
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SA_CHANNEL_LEFT,
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SA_CHANNEL_RIGHT,
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SA_CHANNEL_CENTER,
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SA_CHANNEL_FRONT_LEFT,
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SA_CHANNEL_FRONT_RIGHT,
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SA_CHANNEL_FRONT_CENTER,
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SA_CHANNEL_REAR_LEFT,
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SA_CHANNEL_REAR_RIGHT,
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SA_CHANNEL_REAR_CENTER,
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SA_CHANNEL_LFE,
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SA_CHANNEL_FRONT_LEFT_OF_CENTER,
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SA_CHANNEL_FRONT_RIGHT_OF_CENTER,
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SA_CHANNEL_SIDE_LEFT,
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SA_CHANNEL_SIDE_RIGHT,
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SA_CHANNEL_TOP_CENTER,
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SA_CHANNEL_TOP_FRONT_LEFT,
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SA_CHANNEL_TOP_FRONT_RIGHT,
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SA_CHANNEL_TOP_FRONT_CENTER,
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SA_CHANNEL_TOP_REAR_LEFT,
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SA_CHANNEL_TOP_REAR_RIGHT,
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SA_CHANNEL_TOP_REAR_CENTER,
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SA_CHANNEL_AUX0,
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SA_CHANNEL_AUX1,
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SA_CHANNEL_AUX2,
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SA_CHANNEL_AUX3,
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SA_CHANNEL_AUX4,
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SA_CHANNEL_AUX5,
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SA_CHANNEL_AUX6,
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SA_CHANNEL_AUX7,
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SA_CHANNEL_AUX8,
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SA_CHANNEL_AUX9,
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SA_CHANNEL_AUX10,
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SA_CHANNEL_AUX11,
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SA_CHANNEL_AUX12,
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SA_CHANNEL_AUX13,
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SA_CHANNEL_AUX14,
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SA_CHANNEL_AUX15,
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SA_CHANNEL_AUX16,
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SA_CHANNEL_AUX17,
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SA_CHANNEL_AUX18,
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SA_CHANNEL_AUX19,
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SA_CHANNEL_AUX20,
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SA_CHANNEL_AUX21,
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SA_CHANNEL_AUX22,
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SA_CHANNEL_AUX23,
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SA_CHANNEL_AUX24,
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SA_CHANNEL_AUX25,
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SA_CHANNEL_AUX26,
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SA_CHANNEL_AUX27,
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SA_CHANNEL_AUX28,
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SA_CHANNEL_AUX29,
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SA_CHANNEL_AUX30,
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SA_CHANNEL_AUX31,
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_SA_CHANNEL_MAX
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} sa_channel_t;
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typedef enum {
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SA_STATE_INIT,
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SA_STATE_RUNNING,
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SA_STATE_STOPPED,
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/* put more stuff */
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_SA_STATE_MAX
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} sa_state_t;
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typedef enum {
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SA_XRUN_MODE_STOP,
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SA_XRUN_MODE_SPIN,
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_SA_XRUN_MODE_MAX
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} sa_xrun_mode_t;
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typedef enum {
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SA_ADJUST_UP = 1,
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SA_ADJUST_DOWN = -1,
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SA_ADJUST_NONE = 0
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} sa_adjust_t;
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/* Some kind of meta information. */
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#define SA_META_CLIENT_NAME "sydney.client-name" /* utf-8 */
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#define SA_META_PROCESS_ID "sydney.process-id" /* getpid() */
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#define SA_META_LANGUAGE "sydney.language" /* de_DE and similar */
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/* Some kind of meta information. Not filled in */
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#define SA_META_STREAM_NAME "sydney.stream-name" /* utf-8 */
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#define SA_META_ICON_NAME "sydney.icon-name" /* file name (no slashes) */
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#define SA_META_ICON_PNG "sydney.icon-png" /* PNG blob */
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#define SA_META_ROLE "sydney.role" /* one of: "music", "phone", "game", "event" */
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#define SA_META_X11_DISPLAY "sydney.x11-display" /* X11 display */
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#define SA_META_X11_WINDOW "sydney.x11-window" /* X11 window id */
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/** Main callback function */
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typedef int (*sa_event_callback_t)(sa_stream_t *s, sa_event_t event);
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/** Create an opaque (e.g. AC3) codec stream */
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int sa_stream_create_opaque(sa_stream_t **s, const char *client_name, sa_mode_t mode, const char *codec);
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/** Normal way to open a PCM device */
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int sa_stream_create_pcm(sa_stream_t **s, const char *client_name, sa_mode_t mode, sa_pcm_format_t format, unsigned int rate, unsigned int nchannels);
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/** Initialise the device */
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int sa_stream_open(sa_stream_t *s);
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/** Close/destroy everything */
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int sa_stream_destroy(sa_stream_t *s);
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/* "Soft" params */
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int sa_stream_set_write_lower_watermark(sa_stream_t *s, size_t size);
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int sa_stream_set_read_lower_watermark(sa_stream_t *s, size_t size);
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int sa_stream_set_write_upper_watermark(sa_stream_t *s, size_t size);
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int sa_stream_set_read_upper_watermark(sa_stream_t *s, size_t size);
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/** Set the mapping between channels and the loudspeakers */
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int sa_stream_set_channel_map(sa_stream_t *s, const sa_channel_t map[], unsigned int n);
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/** Whether xruns cause the card to reset */
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int sa_stream_set_xrun_mode(sa_stream_t *s, sa_xrun_mode_t mode);
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/** Set the device to non-interleaved mode */
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int sa_stream_set_non_interleaved(sa_stream_t *s, int enable);
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/** Require dynamic sample rate */
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int sa_stream_set_dynamic_rate(sa_stream_t *s, int enable);
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/** Select driver */
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int sa_stream_set_driver(sa_stream_t *s, const char *driver);
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/** Start callback */
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int sa_stream_start_thread(sa_stream_t *s, sa_event_callback_t callback);
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/** Start callback */
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int sa_stream_stop_thread(sa_stream_t *s);
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/** Change the device connected to the stream */
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int sa_stream_change_device(sa_stream_t *s, const char *device_name);
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/** volume in hundreths of dB*/
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int sa_stream_change_read_volume(sa_stream_t *s, const int32_t vol[], unsigned int n);
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/** volume in hundreths of dB*/
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int sa_stream_change_write_volume(sa_stream_t *s, const int32_t vol[], unsigned int n);
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/** Change the sampling rate */
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int sa_stream_change_rate(sa_stream_t *s, unsigned int rate);
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/** Change some meta data that is attached to the stream */
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int sa_stream_change_meta_data(sa_stream_t *s, const char *name, const void *data, size_t size);
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/** Associate opaque user data */
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int sa_stream_change_user_data(sa_stream_t *s, const void *value);
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/* Hardware-related. This is implementation-specific and hardware specific. */
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int sa_stream_set_adjust_rate(sa_stream_t *s, sa_adjust_t direction);
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int sa_stream_set_adjust_nchannels(sa_stream_t *s, sa_adjust_t direction);
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int sa_stream_set_adjust_pcm_format(sa_stream_t *s, sa_adjust_t direction);
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int sa_stream_set_adjust_watermarks(sa_stream_t *s, sa_adjust_t direction);
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/* Query functions */
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int sa_stream_get_mode(sa_stream_t *s, sa_mode_t *access_mode);
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int sa_stream_get_codec(sa_stream_t *s, char *codec, size_t *size);
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int sa_stream_get_pcm_format(sa_stream_t *s, sa_pcm_format_t *format);
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int sa_stream_get_rate(sa_stream_t *s, unsigned int *rate);
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int sa_stream_get_nchannels(sa_stream_t *s, int *nchannels);
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int sa_stream_get_user_data(sa_stream_t *s, void **value);
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int sa_stream_get_write_lower_watermark(sa_stream_t *s, size_t *size);
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int sa_stream_get_read_lower_watermark(sa_stream_t *s, size_t *size);
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int sa_stream_get_write_upper_watermark(sa_stream_t *s, size_t *size);
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int sa_stream_get_read_upper_watermark(sa_stream_t *s, size_t *size);
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int sa_stream_get_channel_map(sa_stream_t *s, sa_channel_t map[], unsigned int *n);
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int sa_stream_get_xrun_mode(sa_stream_t *s, sa_xrun_mode_t *mode);
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int sa_stream_get_non_interleaved(sa_stream_t *s, int *enabled);
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int sa_stream_get_dynamic_rate(sa_stream_t *s, int *enabled);
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int sa_stream_get_driver(sa_stream_t *s, char *driver_name, size_t *size);
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int sa_stream_get_device(sa_stream_t *s, char *device_name, size_t *size);
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int sa_stream_get_read_volume(sa_stream_t *s, int32_t vol[], unsigned int *n);
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int sa_stream_get_write_volume(sa_stream_t *s, int32_t vol[], unsigned int *n);
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int sa_stream_get_meta_data(sa_stream_t *s, const char *name, void*data, size_t *size);
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int sa_stream_get_adjust_rate(sa_stream_t *s, sa_adjust_t *direction);
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int sa_stream_get_adjust_nchannels(sa_stream_t *s, sa_adjust_t *direction);
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int sa_stream_get_adjust_pcm_format(sa_stream_t *s, sa_adjust_t *direction);
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int sa_stream_get_adjust_watermarks(sa_stream_t *s, sa_adjust_t *direction);
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/** Get current state of the audio device */
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int sa_stream_get_state(sa_stream_t *s, sa_state_t *state);
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/** Obtain the error code */
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int sa_stream_get_event_error(sa_stream_t *s, sa_error_t *error);
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/** Obtain the notification code */
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int sa_stream_get_event_notify(sa_stream_t *s, sa_notify_t *notify);
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/** sync/timing */
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int sa_stream_get_position(sa_stream_t *s, sa_position_t position, int64_t *pos);
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/* Blocking IO calls */
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/** Interleaved capture function */
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int sa_stream_read(sa_stream_t *s, void *data, size_t nbytes);
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/** Non-interleaved capture function */
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int sa_stream_read_ni(sa_stream_t *s, unsigned int channel, void *data, size_t nbytes);
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/** Interleaved playback function */
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int sa_stream_write(sa_stream_t *s, const void *data, size_t nbytes);
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/** Non-interleaved playback function */
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int sa_stream_write_ni(sa_stream_t *s, unsigned int channel, const void *data, size_t nbytes);
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/** Interleaved playback function with seek offset */
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int sa_stream_pwrite(sa_stream_t *s, const void *data, size_t nbytes, int64_t offset, sa_seek_t whence);
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/** Non-interleaved playback function with seek offset */
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int sa_stream_pwrite_ni(sa_stream_t *s, unsigned int channel, const void *data, size_t nbytes, int64_t offset, sa_seek_t whence);
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/** Query how much can be read without blocking */
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int sa_stream_get_read_size(sa_stream_t *s, size_t *size);
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/** Query how much can be written without blocking */
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int sa_stream_get_write_size(sa_stream_t *s, size_t *size);
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/* Control/xrun */
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/** Resume playing after a pause */
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int sa_stream_resume(sa_stream_t *s);
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/** Pause audio playback (do not empty the buffer) */
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int sa_stream_pause(sa_stream_t *s);
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/** Block until all audio has been played */
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int sa_stream_drain(sa_stream_t *s);
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/** Return a human readable error */
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const char *sa_strerror(int code);
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/* Extensions */
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int
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sa_stream_set_volume_abs(sa_stream_t *s, float vol);
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int
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sa_stream_get_volume_abs(sa_stream_t *s, float *vol);
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#endif
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