X-Git-Url: http://git.ieval.ro/?a=blobdiff_plain;f=src%2Fpcm_reader.h;h=b9490a49e6f08faabcd0f6a9c2d6695216988619;hb=1af8624b009faf5bc6b9b8dfa76676483da5f6cf;hp=f8f34f7c4a2d341ec8b82aec56419eb5063fa137;hpb=2d744bd56cd0be236006b7e4a26c3c06442a46e1;p=fdkaac.git

diff --git a/src/pcm_reader.h b/src/pcm_reader.h
index f8f34f7..b9490a4 100644
--- a/src/pcm_reader.h
+++ b/src/pcm_reader.h
@@ -1,6 +1,8 @@
 #ifndef PCM_READER_H
 #define PCM_READER_H
 
+#include "lpcm.h"
+
 typedef struct pcm_reader_t pcm_reader_t;
 
 typedef struct pcm_reader_vtbl_t {
@@ -15,6 +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)
 {
@@ -45,4 +62,51 @@ void pcm_teardown(pcm_reader_t **r)
     (*r)->vtbl->teardown(r);
 }
 
+static inline
+uint32_t bitcount(uint32_t bits)
+{
+    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 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 *pcm_open_sint16_converter(pcm_reader_t *reader);
+
 #endif