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refactor pcm io routines

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nu774
2013-10-24 01:07:06 +09:00
parent 3b666b7546
commit 29a8f73faf
7 changed files with 256 additions and 234 deletions
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42
src/pcm_reader.h
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@ -17,6 +17,21 @@ struct pcm_reader_t {
pcm_reader_vtbl_t *vtbl;
};
typedef int (*pcm_read_callback)(void *cookie, void *data, uint32_t count);
typedef int (*pcm_seek_callback)(void *cookie, int64_t off, int whence);
typedef int64_t (*pcm_tell_callback)(void *cookie);
typedef struct pcm_io_vtbl_t {
pcm_read_callback read;
pcm_seek_callback seek;
pcm_tell_callback tell;
} pcm_io_vtbl_t;
typedef struct pcm_io_context_t {
pcm_io_vtbl_t *vtbl;
void *cookie;
} pcm_io_context_t;
static inline
const pcm_sample_description_t *pcm_get_format(pcm_reader_t *r)
{
@ -49,4 +64,31 @@ void pcm_teardown(pcm_reader_t **r)
pcm_reader_t *pcm_open_sint16_converter(pcm_reader_t *reader);
#define TRY_IO(expr) \
do { \
if ((expr)) goto FAIL; \
} while (0)
int pcm_read(pcm_io_context_t *io, void *buffer, uint32_t size);
int pcm_skip(pcm_io_context_t *io, int64_t count);
static int pcm_seek(pcm_io_context_t *io, int64_t off, int whence)
{
return io->vtbl->seek ? io->vtbl->seek(io->cookie, off, whence) : -1;
}
static inline int64_t pcm_tell(pcm_io_context_t *io)
{
return io->vtbl->tell ? io->vtbl->tell(io->cookie) : -1;
}
int pcm_read16le(pcm_io_context_t *io, uint16_t *value);
int pcm_read16be(pcm_io_context_t *io, uint16_t *value);
int pcm_read32le(pcm_io_context_t *io, uint32_t *value);
int pcm_read32be(pcm_io_context_t *io, uint32_t *value);
int pcm_read64le(pcm_io_context_t *io, uint64_t *value);
int pcm_read64be(pcm_io_context_t *io, uint64_t *value);
int pcm_scanl(pcm_io_context_t *io, const char *fmt, ...);
int pcm_scanb(pcm_io_context_t *io, const char *fmt, ...);
#endif