From 466cac328f15f3538c895208bfe7ea14f3923ffc Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Sun, 1 Jan 2012 12:36:41 -0800
Subject: Add an example program that streams audio using ffmpeg
---
examples/alhelpers.h | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 95 insertions(+)
create mode 100644 examples/alhelpers.h
(limited to 'examples/alhelpers.h')
diff --git a/examples/alhelpers.h b/examples/alhelpers.h
new file mode 100644
index 00000000..5559ea6f
--- /dev/null
+++ b/examples/alhelpers.h
@@ -0,0 +1,95 @@
+#ifndef ALHELPERS_H
+#define ALHELPERS_H
+
+#ifndef _WIN32
+#include <unistd.h>
+#define Sleep(x) usleep((x)*1000)
+#else
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#ifndef AL_SOFT_buffer_samples
+#define AL_SOFT_buffer_samples 1
+/* Sample types */
+#define AL_BYTE 0x1400
+#define AL_UNSIGNED_BYTE 0x1401
+#define AL_SHORT 0x1402
+#define AL_UNSIGNED_SHORT 0x1403
+#define AL_INT 0x1404
+#define AL_UNSIGNED_INT 0x1405
+#define AL_FLOAT 0x1406
+#define AL_DOUBLE 0x1407
+#define AL_BYTE3 0x1408
+#define AL_UNSIGNED_BYTE3 0x1409
+
+/* Channel configurations */
+#define AL_MONO 0x1500
+#define AL_STEREO 0x1501
+#define AL_REAR 0x1502
+#define AL_QUAD 0x1503
+#define AL_5POINT1 0x1504
+#define AL_6POINT1 0x1505
+#define AL_7POINT1 0x1506
+
+/* Storage formats */
+#define AL_MONO8 0x1100
+#define AL_MONO16 0x1101
+#define AL_MONO32F 0x10010
+#define AL_STEREO8 0x1102
+#define AL_STEREO16 0x1103
+#define AL_STEREO32F 0x10011
+#define AL_QUAD8 0x1204
+#define AL_QUAD16 0x1205
+#define AL_QUAD32F 0x1206
+#define AL_REAR8 0x1207
+#define AL_REAR16 0x1208
+#define AL_REAR32F 0x1209
+#define AL_5POINT1_8 0x120A
+#define AL_5POINT1_16 0x120B
+#define AL_5POINT1_32F 0x120C
+#define AL_6POINT1_8 0x120D
+#define AL_6POINT1_16 0x120E
+#define AL_6POINT1_32F 0x120F
+#define AL_7POINT1_8 0x1210
+#define AL_7POINT1_16 0x1211
+#define AL_7POINT1_32F 0x1212
+
+/* Buffer attributes */
+#define AL_INTERNAL_FORMAT 0x2008
+#define AL_BYTE_LENGTH 0x2009
+#define AL_SAMPLE_LENGTH 0x200A
+#define AL_SEC_LENGTH 0x200B
+
+typedef void (AL_APIENTRY*LPALBUFFERSAMPLESSOFT)(ALuint,ALuint,ALenum,ALsizei,ALenum,ALenum,const ALvoid*);
+typedef void (AL_APIENTRY*LPALBUFFERSUBSAMPLESSOFT)(ALuint,ALsizei,ALsizei,ALenum,ALenum,const ALvoid*);
+typedef void (AL_APIENTRY*LPALGETBUFFERSAMPLESSOFT)(ALuint,ALsizei,ALsizei,ALenum,ALenum,ALvoid*);
+typedef ALboolean (AL_APIENTRY*LPALISBUFFERFORMATSUPPORTEDSOFT)(ALenum);
+#endif
+
+
+/* Some helper functions to get the name from the channel and type enums. */
+const char *ChannelsName(ALenum chans);
+const char *TypeName(ALenum type);
+
+/* Helpers to convert frame counts and byte lengths. */
+ALsizei FramesToBytes(ALsizei size, ALenum channels, ALenum type);
+ALsizei BytesToFrames(ALsizei size, ALenum channels, ALenum type);
+
+/* Retrieves a compatible buffer format given the channel configuration and
+ * sample type. Returns 0 if no supported format can be found. */
+ALenum GetFormat(ALenum channels, ALenum type);
+
+/* Easy device init/deinit functions. InitAL returns 0 on success. */
+int InitAL(void);
+void CloseAL(void);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* ALHELPERS_H */
--
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