X-Git-Url: http://git.ieval.ro/?a=blobdiff_plain;f=src%2Fpcm_reader.h;h=ba998e303fd611af17ee12e3488635ed4bcb3cd2;hb=4d48b091d49818772a47559ba7fd7ab58fdd7682;hp=26e7925860ccd608c502c09c4336ce2b2383e3f4;hpb=e8e9f79eec00768ba677c4584f4717fa41dfa886;p=fdkaac.git

diff --git a/src/pcm_reader.h b/src/pcm_reader.h
index 26e7925..ba998e3 100644
--- a/src/pcm_reader.h
+++ b/src/pcm_reader.h
@@ -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)
 {
@@ -47,6 +62,53 @@ 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 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 *pcm_open_sint16_converter(pcm_reader_t *reader);
 
+pcm_reader_t *extrapolater_open(pcm_reader_t *reader);
+
 #endif