Typedefs | |
typedef _snd_output | snd_output_t |
Internal structure for an output object. | |
typedef enum _snd_output_type | snd_output_type_t |
Enumerations | |
enum | _snd_output_type { SND_OUTPUT_STDIO, SND_OUTPUT_BUFFER } |
Functions | |
int | snd_output_stdio_open (snd_output_t **outputp, const char *file, const char *mode) |
Creates a new output object writing to a file. | |
int | snd_output_stdio_attach (snd_output_t **outputp, FILE *fp, int _close) |
Creates a new output object using an existing stdio FILE pointer. | |
int | snd_output_buffer_open (snd_output_t **outputp) |
Creates a new output object with an auto-extending memory buffer. | |
size_t | snd_output_buffer_string (snd_output_t *output, char **buf) |
Returns the address of the buffer of a SND_OUTPUT_TYPE_BUFFER output handle. | |
int | snd_output_close (snd_output_t *output) |
Closes an output handle. | |
int | snd_output_printf (snd_output_t *output, const char *format,...) |
Writes formatted output (like fprintf(3) ) to an output handle. | |
int | snd_output_vprintf (snd_output_t *output, const char *format, va_list args) |
Writes formatted output (like fprintf(3) ) to an output handle. | |
int | snd_output_puts (snd_output_t *output, const char *str) |
Writes a string to an output handle (like fputs(3) ). | |
int | snd_output_putc (snd_output_t *output, int c) |
Writes a character to an output handle (like putc(3) ). | |
int | snd_output_flush (snd_output_t *output) |
Flushes an output handle (like fflush(3)). |
Many PCM debugging functions (snd_pcm_xxx_dump_xxx
) use such an output handle to be able to write not only to the screen but also to other destinations, e.g. to files or to memory buffers.
typedef struct _snd_output snd_output_t |
Internal structure for an output object.
The ALSA library uses a pointer to this structure as a handle to an output object. Applications don't access its contents directly.
typedef enum _snd_output_type snd_output_type_t |
Output type.
enum _snd_output_type |
int snd_output_buffer_open | ( | snd_output_t ** | outputp | ) |
Creates a new output object with an auto-extending memory buffer.
outputp | The function puts the pointer to the new output object at the address specified by outputp . |
size_t snd_output_buffer_string | ( | snd_output_t * | output, | |
char ** | buf | |||
) |
Returns the address of the buffer of a SND_OUTPUT_TYPE_BUFFER output handle.
output | The output handle. | |
buf | The functions puts the current address of the buffer at the address specified by buf . |
int snd_output_close | ( | snd_output_t * | output | ) |
Closes an output handle.
output | The output handle to be closed. |
int snd_output_flush | ( | snd_output_t * | output | ) |
Flushes an output handle (like fflush(3)).
output | The output handle. |
EOF
.fflush
. If the underlying destination is a memory buffer, the write position is reset to the beginning of the buffer. =
:-o
int snd_output_printf | ( | snd_output_t * | output, | |
const char * | format, | |||
... | ||||
) |
Writes formatted output (like fprintf(3)
) to an output handle.
output | The output handle. | |
format | Format string in fprintf format. | |
... | Other fprintf arguments. |
int snd_output_putc | ( | snd_output_t * | output, | |
int | c | |||
) |
Writes a character to an output handle (like putc(3)
).
output | The output handle. | |
c | The character. |
EOF
. int snd_output_puts | ( | snd_output_t * | output, | |
const char * | str | |||
) |
Writes a string to an output handle (like fputs(3)
).
output | The output handle. | |
str | Pointer to the string. |
EOF
. int snd_output_stdio_attach | ( | snd_output_t ** | outputp, | |
FILE * | fp, | |||
int | _close | |||
) |
Creates a new output object using an existing stdio FILE
pointer.
outputp | The function puts the pointer to the new output object at the address specified by outputp . | |
fp | The FILE pointer to write to. Characters are written to the file starting at the current file position. | |
_close | Close flag. Set this to 1 if snd_output_close should close fp by calling fclose . |
int snd_output_stdio_open | ( | snd_output_t ** | outputp, | |
const char * | file, | |||
const char * | mode | |||
) |
Creates a new output object writing to a file.
outputp | The function puts the pointer to the new output object at the address specified by outputp . | |
file | The name of the file to open. | |
mode | The open mode, like fopen(3) . |
int snd_output_vprintf | ( | snd_output_t * | output, | |
const char * | format, | |||
va_list | args | |||
) |
Writes formatted output (like fprintf(3)
) to an output handle.
output | The output handle. | |
format | Format string in fprintf format. | |
args | Other fprintf arguments. |