Remove native audio mixer (Unused in PPSSPP) and stb_vorbis

This commit is contained in:
Henrik Rydgård 2015-09-19 10:40:45 +02:00
parent efbd100dd3
commit ca0a6dc7f9
16 changed files with 1 additions and 5881 deletions

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@ -423,11 +423,6 @@ add_library(rg_etc1 STATIC
ext/native/ext/rg_etc1/rg_etc1.h)
include_directories(ext/native/ext/rg_etc1)
add_library(stb_vorbis STATIC
ext/native/ext/stb_vorbis/stb_vorbis.c
ext/native/ext/stb_vorbis/stb_vorbis.h)
include_directories(ext/native/ext/stb_vorbis)
if(USE_FFMPEG)
if(USE_SYSTEM_FFMPEG)
find_package(FFMPEG)
@ -876,10 +871,6 @@ add_library(native STATIC
${nativeExtra}
ext/native/base/backtrace.cpp
ext/native/base/backtrace.h
ext/native/audio/mixer.cpp
ext/native/audio/mixer.h
ext/native/audio/wav_read.cpp
ext/native/audio/wav_read.h
ext/native/base/basictypes.h
ext/native/base/buffer.cpp
ext/native/base/buffer.h
@ -1022,7 +1013,7 @@ if (LINUX AND NOT ANDROID)
SET(RT_LIB rt)
endif()
target_link_libraries(native ${LIBZIP_LIBRARY} ${ZLIB_LIBRARY} ${PNG_LIBRARY} rg_etc1 vjson stb_vorbis snappy udis86 ${RT_LIB} ${GLEW_LIBRARIES})
target_link_libraries(native ${LIBZIP_LIBRARY} ${ZLIB_LIBRARY} ${PNG_LIBRARY} rg_etc1 vjson snappy udis86 ${RT_LIB} ${GLEW_LIBRARIES})
if(ANDROID)
target_link_libraries(native log EGL)

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@ -36,12 +36,6 @@ SOURCES += $$P/ext/native/ext/jpge/*.cpp
HEADERS += $$P/ext/native/ext/jpge/*.h
INCLUDEPATH += $$P/ext/native/ext/jpge
# Stb_vorbis
SOURCES += $$P/ext/native/ext/stb_vorbis/stb_vorbis.c
HEADERS += $$P/ext/native/ext/stb_vorbis/stb_vorbis.h
INCLUDEPATH += $$P/ext/native/ext/stb_vorbis
# Snappy
!exists( /usr/include/snappy-c.h ) {
SOURCES += $$P/ext/snappy/*.cpp

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@ -22,7 +22,6 @@
#include "file/zip_read.h"
#include "input/input_state.h"
#include "profiler/profiler.h"
#include "audio/mixer.h"
#include "math/math_util.h"
#include "net/resolve.h"
#include "android/jni/native_audio.h"

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@ -1,92 +0,0 @@
/usr/bin/c++
-std=gnu++0x
CMakeFiles/ppsspp.dir/home/artart78/prog/psp/ppsspp/android/jni/NativeApp.cpp.o
CMakeFiles/ppsspp.dir/home/artart78/prog/psp/ppsspp/android/jni/EmuScreen.cpp.o
CMakeFiles/ppsspp.dir/home/artart78/prog/psp/ppsspp/android/jni/MenuScreens.cpp.o
CMakeFiles/ppsspp.dir/home/artart78/prog/psp/ppsspp/android/jni/GamepadEmu.cpp.o
CMakeFiles/ppsspp.dir/home/artart78/prog/psp/ppsspp/android/jni/UIShader.cpp.o
CMakeFiles/ppsspp.dir/home/artart78/prog/psp/ppsspp/android/jni/ui_atlas.cpp.o
CMakeFiles/ppsspp.dir/home/artart78/prog/psp/ppsspp/native/base/PCMain.cpp.o
-o
ppsspp
-rdynamic
-L/usr/local/lib
-L/opt/local/lib
-L/usr/X11/lib
-Wl,-Bstatic
-lSDLmain
-Wl,-Bdynamic
-lSDL
-lpthread
-lGLU
-lGL
-lSM
-lICE
-lX11
-lXext
-lGLEW
kirk/libkirk.a
file/libfile.a
kirk/libkirk.a
math/liblin.a
kirk/libkirk.a
-lpng
kirk/libkirk.a
-lz
kirk/libkirk.a
gfx/libgfx.a
kirk/libkirk.a
gfx_es2/libgfx_es2.a
kirk/libkirk.a
etcpack/libetcdec.a
kirk/libkirk.a
image/libimage.a
kirk/libkirk.a
stb_image/libstb_image.a
kirk/libkirk.a
audio/libmixer.a
kirk/libkirk.a
net/libnet.a
kirk/libkirk.a
ui/libui.a
kirk/libkirk.a
profiler/libprofiler.a
kirk/libkirk.a
base/libtimeutil.a
kirk/libkirk.a
libzip/libzip.a
kirk/libkirk.a
base/libbase.a
kirk/libkirk.a
math/liblin.a
kirk/libkirk.a
vjson/libvjson.a
kirk/libkirk.a
stb_vorbis/libstb_vorbis.a
kirk/libkirk.a
sha1/libsha1.a
kirk/libkirk.a
jsonwriter/libjsonwriter.a
kirk/libkirk.a
Common/libcommon.a
kirk/libkirk.a
Core/libcore.a
kirk/libkirk.a
GPU/libgpu.a
kirk/libkirk.a
base/libbase.a
kirk/libkirk.a
Common/libcommon.a
kirk/libkirk.a
math/liblin.a
kirk/libkirk.a
gfx_es2/libgfx_es2.a
kirk/libkirk.a
file/libfile.a
kirk/libkirk.a
libzip/libzip.a
kirk/libkirk.a
gfx/libgfx.a
kirk/libkirk.a
-Wl,-rpath,/usr/local/lib:/opt/local/lib:/usr/X11/lib

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@ -7,8 +7,6 @@ include $(CLEAR_VARS)
LOCAL_MODULE := libnative
LOCAL_ARM_MODE := arm
LOCAL_SRC_FILES :=\
audio/wav_read.cpp \
audio/mixer.cpp.arm \
base/backtrace.cpp \
base/buffer.cpp \
base/compat.cpp \
@ -38,7 +36,6 @@ LOCAL_SRC_FILES :=\
ext/jpge/jpgd.cpp \
ext/jpge/jpge.cpp \
ext/sha1/sha1.cpp \
ext/stb_vorbis/stb_vorbis.c.arm \
ext/vjson/json.cpp \
ext/vjson/block_allocator.cpp \
file/fd_util.cpp \

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@ -1,50 +0,0 @@
native
======
This is my library of stuff that I use when writing C++ programs, mostly for Android but it's all written to enable easy portability between Android, Linux, Windows and MacOSX. The code is part ugly, part inconsistent but quite useful.
Features
--------
* JSON read/write (two libraries that should be made more similar)
* basic OpenGL utility code, like compressed texture loading
* 2D texture atlases and drawing code
* ETC1 texture save/load support
* basic logging
* Really simple audio mixer with OGG sample support
* RIFF file read/write
* MIDI Input (only on Windows)
Notes
-----
* The associated tools to create ZIM texture files and atlases do not yet live here but I might move them here eventually.
* This library is not really meant to be a public library but I see no reason not to set it free.
* Note that the included VS project is probably not very useful for you and you're likely better off making your own.
* Don't complain about inconsistent naming etc - this consists of code that has been cobbled together from a variety of my projects through the years. Fashions come and go.
Licenses
--------
This library, for my convenience, incorporates code from a variety of public domain or similarly-licensed code. This is the list:
* glew (GL extension wrangler), MIT license. TODO: should just use a submodule.
* rg_etc1. ZLIB license.
* sha1, public domain implementation by Dominik Reichl
* vjson in a heavily modified form, originally by Ivan Vashchaev (TODO: break out into its own repo?)
* libzip with attribution "Copyright (C) 1999-2007 Dieter Baron and Thomas Klausner"
* stb_vorbis, public domain by Sean Barrett of RAD Tools
If you're not okay with the licenses above, don't use this code.
I hereby release all code here not under the licenses above under the MIT license.
Contact
-------
If you find this useful for your own projects, drop me a line at hrydgard@gmail.com .
Henrik Rydgård

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@ -1,11 +0,0 @@
set(SRCS
mixer.cpp
wav_read.cpp)
set(SRCS ${SRCS})
add_library(mixer STATIC ${SRCS})
if(UNIX)
add_definitions(-fPIC)
endif(UNIX)

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@ -1,201 +0,0 @@
#include <string.h>
#include "audio/mixer.h"
#include "audio/wav_read.h"
#include "base/logging.h"
#include "ext/stb_vorbis/stb_vorbis.h"
#include "file/vfs.h"
// TODO:
// * Vorbis streaming playback
struct ChannelEffectState {
// Filter state
};
enum CLIP_TYPE {
CT_PCM16,
CT_SYNTHFX,
CT_VORBIS,
// CT_PHOENIX?
};
struct Clip {
int type;
short *data;
int length;
int num_channels; // this is NOT stereo vs mono
int sample_rate;
int loop_start;
int loop_end;
};
// If current_clip == 0, the channel is free.
enum ClipPlaybackState {
PB_STOPPED = 0,
PB_PLAYING = 1,
};
struct Channel {
const Clip *current_clip;
// Playback state
ClipPlaybackState state;
int pos;
PlayParams params;
// Effect state
ChannelEffectState effect_state;
};
struct Mixer {
Channel *channels;
int sample_rate;
int num_channels;
int num_fixed_channels;
};
Mixer *mixer_create(int sample_rate, int channels, int fixed_channels) {
Mixer *mixer = new Mixer();
memset(mixer, 0, sizeof(Mixer));
mixer->channels = new Channel[channels];
memset(mixer->channels, 0, sizeof(Channel) * channels);
mixer->sample_rate = sample_rate;
mixer->num_channels = channels;
mixer->num_fixed_channels = fixed_channels;
return mixer;
}
void mixer_destroy(Mixer *mixer) {
delete [] mixer->channels;
delete mixer;
}
static int get_free_channel(Mixer *mixer) {
int chan_with_biggest_pos = -1;
int biggest_pos = -1;
for (int i = mixer->num_fixed_channels; i < mixer->num_channels; i++) {
Channel *chan = &mixer->channels[i];
if (!chan->current_clip) {
return i;
}
if (chan->pos > biggest_pos) {
biggest_pos = chan->pos;
chan_with_biggest_pos = i;
}
}
return chan_with_biggest_pos;
}
Clip *clip_load(const char *filename) {
short *data;
int num_samples;
int sample_rate, num_channels;
if (!strcmp(filename + strlen(filename) - 4, ".ogg")) {
// Ogg file. For now, directly decompress, no streaming support.
uint8_t *filedata;
size_t size;
filedata = VFSReadFile(filename, &size);
num_samples = (int)stb_vorbis_decode_memory(filedata, (int)size, &num_channels, &data);
if (num_samples <= 0)
return NULL;
sample_rate = 44100;
ILOG("read ogg %s, length %i, rate %i", filename, num_samples, sample_rate);
} else {
// Wav file. Easy peasy.
data = wav_read(filename, &num_samples, &sample_rate, &num_channels);
if (!data) {
return NULL;
}
}
Clip *clip = new Clip();
clip->type = CT_PCM16;
clip->data = data;
clip->length = num_samples;
clip->num_channels = num_channels;
clip->sample_rate = sample_rate;
clip->loop_start = 0;
clip->loop_end = 0;
return clip;
}
void clip_destroy(Clip *clip) {
if (clip) {
free(clip->data);
delete clip;
} else {
ELOG("Can't destroy zero clip");
}
}
const short *clip_data(const Clip *clip)
{
return clip->data;
}
size_t clip_length(const Clip *clip) {
return clip->length;
}
void clip_set_loop(Clip *clip, int start, int end) {
clip->loop_start = start;
clip->loop_end = end;
}
PlayParams *mixer_play_clip(Mixer *mixer, const Clip *clip, int channel) {
if (channel == -1) {
channel = get_free_channel(mixer);
}
Channel *chan = &mixer->channels[channel];
// Think about this order and make sure it's thread"safe" (not perfect but should not cause crashes).
chan->pos = 0;
chan->current_clip = clip;
chan->state = PB_PLAYING;
PlayParams *params = &chan->params;
params->volume = 128;
params->pan = 128;
return params;
}
void mixer_mix(Mixer *mixer, short *buffer, int num_samples) {
// Clear the buffer.
memset(buffer, 0, num_samples * sizeof(short) * 2);
for (int i = 0; i < mixer->num_channels; i++) {
Channel *chan = &mixer->channels[i];
if (chan->state == PB_PLAYING) {
const Clip *clip = chan->current_clip;
if (clip->type == CT_PCM16) {
// For now, only allow mono PCM
CHECK(clip->num_channels == 1);
if (true || chan->params.delta == 0) {
// Fast playback of non pitched clips
int cnt = num_samples;
if (clip->length - chan->pos < cnt) {
cnt = clip->length - chan->pos;
}
// TODO: Take pan into account.
int left_volume = chan->params.volume;
int right_volume = chan->params.volume;
// TODO: NEONize. Can also make special loops for left_volume == right_volume etc.
for (int s = 0; s < cnt; s++) {
int cdata = clip->data[chan->pos];
buffer[s * 2 + 0] += cdata * left_volume >> 8;
buffer[s * 2 + 1] += cdata * right_volume >> 8;
chan->pos++;
}
if (chan->pos >= clip->length) {
chan->state = PB_STOPPED;
chan->current_clip = 0;
break;
}
}
} else if (clip->type == CT_VORBIS) {
// For music
}
}
}
}

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@ -1,43 +0,0 @@
#pragma once
#include "base/basictypes.h"
// Simple mixer intended for sound effects for games.
// The clip loading code supports ogg SFX.
struct Mixer;
struct Clip;
struct Channel;
// This struct is public for easy manipulation of running channels.
struct PlayParams {
uint8_t volume; // 0-255
uint8_t pan; // 0-255, 127 is dead center.
int32_t delta;
};
// Mixer
// ==========================
// For now, channels is required to be 2 (it specifies L/R, not mixing channels)
Mixer *mixer_create(int sample_rate, int channels, int fixed_channels);
void mixer_destroy(Mixer *mixer);
// Buffer must be r/w.
void mixer_mix(Mixer *mixer, short *buffer, int num_samples);
// Clip
// ==========================
Clip *clip_load(const char *filename);
void clip_destroy(Clip *clip);
const short *clip_data(const Clip *clip);
size_t clip_length(const Clip *clip);
void clip_set_loop(int start, int end);
// The returned PlayState pointer can be used to set the playback parameters,
// but must not be kept around unless you are using a fixed channel.
// Channel must be either -1 for auto assignment to a free channel, or less
// than the number of fixed channels that the mixer was created with.
PlayParams *mixer_play_clip(Mixer *mixer, const Clip *clip, int channel);

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@ -1,70 +0,0 @@
#include "base/basictypes.h"
#include "base/logging.h"
#include "audio/wav_read.h"
#include "file/chunk_file.h"
short *wav_read(const char *filename,
int *num_samples, int *sample_rate,
int *num_channels)
{
ChunkFile cf(filename, true);
if (cf.failed()) {
WLOG("ERROR: Wave file %s could not be opened", filename);
return 0;
}
short *data = 0;
int samplesPerSec, avgBytesPerSec,wBlockAlign,wBytesPerSample;
if (cf.descend('RIFF')) {
cf.readInt(); //get past 'WAVE'
if (cf.descend('fmt ')) { //enter the format chunk
int temp = cf.readInt();
int format = temp & 0xFFFF;
if (format != 1) {
cf.ascend();
cf.ascend();
ELOG("Error - bad format");
return NULL;
}
*num_channels = temp >> 16;
samplesPerSec = cf.readInt();
avgBytesPerSec = cf.readInt();
temp = cf.readInt();
wBlockAlign = temp & 0xFFFF;
wBytesPerSample = temp >> 16;
cf.ascend();
// ILOG("got fmt data: %i", samplesPerSec);
} else {
ELOG("Error - no format chunk in wav");
cf.ascend();
return NULL;
}
if (cf.descend('data')) { //enter the data chunk
int numBytes = cf.getCurrentChunkSize();
int numSamples = numBytes / wBlockAlign;
data = (short *)malloc(sizeof(short) * numSamples * *num_channels);
*num_samples = numSamples;
if (wBlockAlign == 2 && *num_channels == 1) {
cf.readData((uint8_t *)data,numBytes);
} else {
ELOG("Error - bad blockalign or channels");
free(data);
return NULL;
}
cf.ascend();
} else {
ELOG("Error - no data chunk in wav");
cf.ascend();
return NULL;
}
cf.ascend();
} else {
ELOG("Could not descend into RIFF file");
return NULL;
}
*sample_rate = samplesPerSec;
ILOG("read wav %s, length %i, rate %i", filename, *num_samples, *sample_rate);
return data;
}

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@ -1,7 +0,0 @@
#include "base/basictypes.h"
// Allocates a buffer that should be freed using free().
short *wav_read(const char *filename,
int *num_samples, int *sample_rate,
int *num_channels);
// TODO: Non-allocating version.

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@ -1,10 +0,0 @@
cmake_minimum_required(VERSION 2.6)
#if(UNIX)
add_definitions(-fPIC)
add_definitions(-g)
add_definitions(-O2)
add_definitions(-Wall)
#endif(UNIX)
add_library(stb_vorbis stb_vorbis.c)

File diff suppressed because it is too large Load Diff

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@ -1,329 +0,0 @@
//////////////////////////////////////////////////////////////////////////////
//
// HEADER BEGINS HERE
//
#ifndef STB_VORBIS_INCLUDE_STB_VORBIS_H
#define STB_VORBIS_INCLUDE_STB_VORBIS_H
#if defined(STB_VORBIS_NO_CRT) && !defined(STB_VORBIS_NO_STDIO)
#define STB_VORBIS_NO_STDIO 1
#endif
#ifndef STB_VORBIS_NO_STDIO
#include <stdio.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/////////// THREAD SAFETY
// Individual stb_vorbis* handles are not thread-safe; you cannot decode from
// them from multiple threads at the same time. However, you can have multiple
// stb_vorbis* handles and decode from them independently in multiple thrads.
/////////// MEMORY ALLOCATION
// normally stb_vorbis uses malloc() to allocate memory at startup,
// and alloca() to allocate temporary memory during a frame on the
// stack. (Memory consumption will depend on the amount of setup
// data in the file and how you set the compile flags for speed
// vs. size. In my test files the maximal-size usage is ~150KB.)
//
// You can modify the wrapper functions in the source (setup_malloc,
// setup_temp_malloc, temp_malloc) to change this behavior, or you
// can use a simpler allocation model: you pass in a buffer from
// which stb_vorbis will allocate _all_ its memory (including the
// temp memory). "open" may fail with a VORBIS_outofmem if you
// do not pass in enough data; there is no way to determine how
// much you do need except to succeed (at which point you can
// query get_info to find the exact amount required. yes I know
// this is lame).
//
// If you pass in a non-NULL buffer of the type below, allocation
// will occur from it as described above. Otherwise just pass NULL
// to use malloc()/alloca()
typedef struct
{
char *alloc_buffer;
int alloc_buffer_length_in_bytes;
} stb_vorbis_alloc;
/////////// FUNCTIONS USEABLE WITH ALL INPUT MODES
typedef struct stb_vorbis stb_vorbis;
typedef struct
{
unsigned int sample_rate;
int channels;
unsigned int setup_memory_required;
unsigned int setup_temp_memory_required;
unsigned int temp_memory_required;
int max_frame_size;
} stb_vorbis_info;
// get general information about the file
extern stb_vorbis_info stb_vorbis_get_info(stb_vorbis *f);
// get the last error detected (clears it, too)
extern int stb_vorbis_get_error(stb_vorbis *f);
// close an ogg vorbis file and free all memory in use
extern void stb_vorbis_close(stb_vorbis *f);
// this function returns the offset (in samples) from the beginning of the
// file that will be returned by the next decode, if it is known, or -1
// otherwise. after a flush_pushdata() call, this may take a while before
// it becomes valid again.
// NOT WORKING YET after a seek with PULLDATA API
extern int stb_vorbis_get_sample_offset(stb_vorbis *f);
// returns the current seek point within the file, or offset from the beginning
// of the memory buffer. In pushdata mode it returns 0.
extern unsigned int stb_vorbis_get_file_offset(stb_vorbis *f);
/////////// PUSHDATA API
#ifndef STB_VORBIS_NO_PUSHDATA_API
// this API allows you to get blocks of data from any source and hand
// them to stb_vorbis. you have to buffer them; stb_vorbis will tell
// you how much it used, and you have to give it the rest next time;
// and stb_vorbis may not have enough data to work with and you will
// need to give it the same data again PLUS more. Note that the Vorbis
// specification does not bound the size of an individual frame.
extern stb_vorbis *stb_vorbis_open_pushdata(
unsigned char *datablock, int datablock_length_in_bytes,
int *datablock_memory_consumed_in_bytes,
int *error,
stb_vorbis_alloc *alloc_buffer);
// create a vorbis decoder by passing in the initial data block containing
// the ogg&vorbis headers (you don't need to do parse them, just provide
// the first N bytes of the file--you're told if it's not enough, see below)
// on success, returns an stb_vorbis *, does not set error, returns the amount of
// data parsed/consumed on this call in *datablock_memory_consumed_in_bytes;
// on failure, returns NULL on error and sets *error, does not change *datablock_memory_consumed
// if returns NULL and *error is VORBIS_need_more_data, then the input block was
// incomplete and you need to pass in a larger block from the start of the file
extern int stb_vorbis_decode_frame_pushdata(
stb_vorbis *f, unsigned char *datablock, int datablock_length_in_bytes,
int *channels, // place to write number of float * buffers
float ***output, // place to write float ** array of float * buffers
int *samples // place to write number of output samples
);
// decode a frame of audio sample data if possible from the passed-in data block
//
// return value: number of bytes we used from datablock
// possible cases:
// 0 bytes used, 0 samples output (need more data)
// N bytes used, 0 samples output (resynching the stream, keep going)
// N bytes used, M samples output (one frame of data)
// note that after opening a file, you will ALWAYS get one N-bytes,0-sample
// frame, because Vorbis always "discards" the first frame.
//
// Note that on resynch, stb_vorbis will rarely consume all of the buffer,
// instead only datablock_length_in_bytes-3 or less. This is because it wants
// to avoid missing parts of a page header if they cross a datablock boundary,
// without writing state-machiney code to record a partial detection.
//
// The number of channels returned are stored in *channels (which can be
// NULL--it is always the same as the number of channels reported by
// get_info). *output will contain an array of float* buffers, one per
// channel. In other words, (*output)[0][0] contains the first sample from
// the first channel, and (*output)[1][0] contains the first sample from
// the second channel.
extern void stb_vorbis_flush_pushdata(stb_vorbis *f);
// inform stb_vorbis that your next datablock will not be contiguous with
// previous ones (e.g. you've seeked in the data); future attempts to decode
// frames will cause stb_vorbis to resynchronize (as noted above), and
// once it sees a valid Ogg page (typically 4-8KB, as large as 64KB), it
// will begin decoding the _next_ frame.
//
// if you want to seek using pushdata, you need to seek in your file, then
// call stb_vorbis_flush_pushdata(), then start calling decoding, then once
// decoding is returning you data, call stb_vorbis_get_sample_offset, and
// if you don't like the result, seek your file again and repeat.
#endif
////////// PULLING INPUT API
#ifndef STB_VORBIS_NO_PULLDATA_API
// This API assumes stb_vorbis is allowed to pull data from a source--
// either a block of memory containing the _entire_ vorbis stream, or a
// FILE * that you or it create, or possibly some other reading mechanism
// if you go modify the source to replace the FILE * case with some kind
// of callback to your code. (But if you don't support seeking, you may
// just want to go ahead and use pushdata.)
#if !defined(STB_VORBIS_NO_STDIO) && !defined(STB_VORBIS_NO_INTEGER_CONVERSION)
extern int stb_vorbis_decode_filename(char *filename, int *channels, short **output);
#endif
extern int stb_vorbis_decode_memory(unsigned char *mem, int len, int *channels, short **output);
// decode an entire file and output the data interleaved into a malloc()ed
// buffer stored in *output. The return value is the number of samples
// decoded, or -1 if the file could not be opened or was not an ogg vorbis file.
// When you're done with it, just free() the pointer returned in *output.
extern stb_vorbis * stb_vorbis_open_memory(unsigned char *data, int len,
int *error, stb_vorbis_alloc *alloc_buffer);
// create an ogg vorbis decoder from an ogg vorbis stream in memory (note
// this must be the entire stream!). on failure, returns NULL and sets *error
#ifndef STB_VORBIS_NO_STDIO
extern stb_vorbis * stb_vorbis_open_filename(char *filename,
int *error, stb_vorbis_alloc *alloc_buffer);
// create an ogg vorbis decoder from a filename via fopen(). on failure,
// returns NULL and sets *error (possibly to VORBIS_file_open_failure).
extern stb_vorbis * stb_vorbis_open_file(FILE *f, int close_handle_on_close,
int *error, stb_vorbis_alloc *alloc_buffer);
// create an ogg vorbis decoder from an open FILE *, looking for a stream at
// the _current_ seek point (ftell). on failure, returns NULL and sets *error.
// note that stb_vorbis must "own" this stream; if you seek it in between
// calls to stb_vorbis, it will become confused. Morever, if you attempt to
// perform stb_vorbis_seek_*() operations on this file, it will assume it
// owns the _entire_ rest of the file after the start point. Use the next
// function, stb_vorbis_open_file_section(), to limit it.
extern stb_vorbis * stb_vorbis_open_file_section(FILE *f, int close_handle_on_close,
int *error, stb_vorbis_alloc *alloc_buffer, unsigned int len);
// create an ogg vorbis decoder from an open FILE *, looking for a stream at
// the _current_ seek point (ftell); the stream will be of length 'len' bytes.
// on failure, returns NULL and sets *error. note that stb_vorbis must "own"
// this stream; if you seek it in between calls to stb_vorbis, it will become
// confused.
#endif
extern int stb_vorbis_seek_frame(stb_vorbis *f, unsigned int sample_number);
extern int stb_vorbis_seek(stb_vorbis *f, unsigned int sample_number);
// NOT WORKING YET
// these functions seek in the Vorbis file to (approximately) 'sample_number'.
// after calling seek_frame(), the next call to get_frame_*() will include
// the specified sample. after calling stb_vorbis_seek(), the next call to
// stb_vorbis_get_samples_* will start with the specified sample. If you
// do not need to seek to EXACTLY the target sample when using get_samples_*,
// you can also use seek_frame().
extern void stb_vorbis_seek_start(stb_vorbis *f);
// this function is equivalent to stb_vorbis_seek(f,0), but it
// actually works
extern unsigned int stb_vorbis_stream_length_in_samples(stb_vorbis *f);
extern float stb_vorbis_stream_length_in_seconds(stb_vorbis *f);
// these functions return the total length of the vorbis stream
extern int stb_vorbis_get_frame_float(stb_vorbis *f, int *channels, float ***output);
// decode the next frame and return the number of samples. the number of
// channels returned are stored in *channels (which can be NULL--it is always
// the same as the number of channels reported by get_info). *output will
// contain an array of float* buffers, one per channel. These outputs will
// be overwritten on the next call to stb_vorbis_get_frame_*.
//
// You generally should not intermix calls to stb_vorbis_get_frame_*()
// and stb_vorbis_get_samples_*(), since the latter calls the former.
#ifndef STB_VORBIS_NO_INTEGER_CONVERSION
extern int stb_vorbis_get_frame_short_interleaved(stb_vorbis *f, int num_c, short *buffer, int num_shorts);
extern int stb_vorbis_get_frame_short (stb_vorbis *f, int num_c, short **buffer, int num_samples);
#endif
// decode the next frame and return the number of samples per channel. the
// data is coerced to the number of channels you request according to the
// channel coercion rules (see below). You must pass in the size of your
// buffer(s) so that stb_vorbis will not overwrite the end of the buffer.
// The maximum buffer size needed can be gotten from get_info(); however,
// the Vorbis I specification implies an absolute maximum of 4096 samples
// per channel. Note that for interleaved data, you pass in the number of
// shorts (the size of your array), but the return value is the number of
// samples per channel, not the total number of samples.
// Channel coercion rules:
// Let M be the number of channels requested, and N the number of channels present,
// and Cn be the nth channel; let stereo L be the sum of all L and center channels,
// and stereo R be the sum of all R and center channels (channel assignment from the
// vorbis spec).
// M N output
// 1 k sum(Ck) for all k
// 2 * stereo L, stereo R
// k l k > l, the first l channels, then 0s
// k l k <= l, the first k channels
// Note that this is not _good_ surround etc. mixing at all! It's just so
// you get something useful.
extern int stb_vorbis_get_samples_float_interleaved(stb_vorbis *f, int channels, float *buffer, int num_floats);
extern int stb_vorbis_get_samples_float(stb_vorbis *f, int channels, float **buffer, int num_samples);
// gets num_samples samples, not necessarily on a frame boundary--this requires
// buffering so you have to supply the buffers. DOES NOT APPLY THE COERCION RULES.
// Returns the number of samples stored per channel; it may be less than requested
// at the end of the file. If there are no more samples in the file, returns 0.
#ifndef STB_VORBIS_NO_INTEGER_CONVERSION
extern int stb_vorbis_get_samples_short_interleaved(stb_vorbis *f, int channels, short *buffer, int num_shorts);
extern int stb_vorbis_get_samples_short(stb_vorbis *f, int channels, short **buffer, int num_samples);
#endif
// gets num_samples samples, not necessarily on a frame boundary--this requires
// buffering so you have to supply the buffers. Applies the coercion rules above
// to produce 'channels' channels. Returns the number of samples stored per channel;
// it may be less than requested at the end of the file. If there are no more
// samples in the file, returns 0.
#endif
//////// ERROR CODES
enum STBVorbisError
{
VORBIS__no_error,
VORBIS_need_more_data=1, // not a real error
VORBIS_invalid_api_mixing, // can't mix API modes
VORBIS_outofmem, // not enough memory
VORBIS_feature_not_supported, // uses floor 0
VORBIS_too_many_channels, // STB_VORBIS_MAX_CHANNELS is too small
VORBIS_file_open_failure, // fopen() failed
VORBIS_seek_without_length, // can't seek in unknown-length file
VORBIS_unexpected_eof=10, // file is truncated?
VORBIS_seek_invalid, // seek past EOF
// decoding errors (corrupt/invalid stream) -- you probably
// don't care about the exact details of these
// vorbis errors:
VORBIS_invalid_setup=20,
VORBIS_invalid_stream,
// ogg errors:
VORBIS_missing_capture_pattern=30,
VORBIS_invalid_stream_structure_version,
VORBIS_continued_packet_flag_invalid,
VORBIS_incorrect_stream_serial_number,
VORBIS_invalid_first_page,
VORBIS_bad_packet_type,
VORBIS_cant_find_last_page,
VORBIS_seek_failed,
};
#ifdef __cplusplus
}
#endif
#endif // STB_VORBIS_INCLUDE_STB_VORBIS_H
//
// HEADER ENDS HERE
//
//////////////////////////////////////////////////////////////////////////////

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