+/*
+ * Copyright (C) 2013 nu774
+ * For conditions of distribution and use, see copyright notice in COPYING
+ */
#ifndef PCM_READER_H
#define PCM_READER_H
#include "lpcm.h"
+#include "metadata.h"
typedef struct pcm_reader_t 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)
{
return r->vtbl->get_position(r);
}
+int pcm_read_frames(pcm_reader_t *r, void *data, unsigned nframes);
+
static inline
-int64_t pcm_read_frames(pcm_reader_t *r, void *data, unsigned nframes)
+void pcm_teardown(pcm_reader_t **r)
{
- return r->vtbl->read_frames(r, data, nframes);
+ (*r)->vtbl->teardown(r);
}
static inline
-void pcm_teardown(pcm_reader_t **r)
+uint32_t bitcount(uint32_t bits)
{
- (*r)->vtbl->teardown(r);
+ bits = (bits & 0x55555555) + (bits >> 1 & 0x55555555);
+ bits = (bits & 0x33333333) + (bits >> 2 & 0x33333333);
+ bits = (bits & 0x0f0f0f0f) + (bits >> 4 & 0x0f0f0f0f);
+ bits = (bits & 0x00ff00ff) + (bits >> 8 & 0x00ff00ff);
+ return (bits & 0x0000ffff) + (bits >>16 & 0x0000ffff);
}
+#define TRY_IO(expr) \
+ do { \
+ if ((expr)) goto FAIL; \
+ } while (0)
+
+#define ENSURE(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 inline 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, ...);
+
+int apple_chan_chunk(pcm_io_context_t *io, uint32_t chunk_size,
+ pcm_sample_description_t *fmt, uint8_t *mapping);
+
+pcm_reader_t *wav_open(pcm_io_context_t *io, int ignore_length);
+pcm_reader_t *raw_open(pcm_io_context_t *io,
+ const pcm_sample_description_t *desc);
+pcm_reader_t *caf_open(pcm_io_context_t *io,
+ aacenc_tag_callback_t tag_callback, void *tag_ctx);
+
+pcm_reader_t *pcm_open_native_converter(pcm_reader_t *reader);
+pcm_reader_t *pcm_open_float_converter(pcm_reader_t *reader);
pcm_reader_t *pcm_open_sint16_converter(pcm_reader_t *reader);
+pcm_reader_t *extrapolater_open(pcm_reader_t *reader);
+pcm_reader_t *limiter_open(pcm_reader_t *reader);
+
#endif