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SDL/src/audio/SDL_audio_c.h

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Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
/*
Simple DirectMedia Layer
Updated copyright for 2017
2017-01-02 02:33:28 +00:00
Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
Patched to compile on some compilers.
2017-01-06 00:45:57 +00:00
#ifndef SDL_audio_c_h_
#define SDL_audio_c_h_
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
#include "../SDL_internal.h"
Reworked audio converter code. This no longer uses a script to generate code for every possible type conversion or resampler. This caused a bloat in binary size and and compile times. Now we use a handful of more generic functions and assume staying in the CPU cache is the most important thing anyhow. This shrinks the size of the final build (in this case: macOS X amd64, -Os to optimize for size) by 15%. When compiling on a single core, build times drop by about 15% too (although the previous cost was largely hidden by multicore builds).
2016-11-05 06:34:38 +00:00
#ifndef DEBUG_CONVERT
#define DEBUG_CONVERT 0
#endif
#if DEBUG_CONVERT
#define LOG_DEBUG_CONVERT(from, to) fprintf(stderr, "Converting %s to %s.\n", from, to);
#else
#define LOG_DEBUG_CONVERT(from, to)
#endif
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
/* Functions and variables exported from SDL_audio.c for SDL_sysaudio.c */
/* Functions to get a list of "close" audio formats */
extern SDL_AudioFormat SDL_FirstAudioFormat(SDL_AudioFormat format);
extern SDL_AudioFormat SDL_NextAudioFormat(void);
/* Function to calculate the size and silence for a SDL_AudioSpec */
extern void SDL_CalculateAudioSpec(SDL_AudioSpec * spec);
Reworked audio converter code. This no longer uses a script to generate code for every possible type conversion or resampler. This caused a bloat in binary size and and compile times. Now we use a handful of more generic functions and assume staying in the CPU cache is the most important thing anyhow. This shrinks the size of the final build (in this case: macOS X amd64, -Os to optimize for size) by 15%. When compiling on a single core, build times drop by about 15% too (although the previous cost was largely hidden by multicore builds).
2016-11-05 06:34:38 +00:00
void SDLCALL SDL_Convert_S8_to_F32(SDL_AudioCVT *cvt, SDL_AudioFormat format);
void SDLCALL SDL_Convert_U8_to_F32(SDL_AudioCVT *cvt, SDL_AudioFormat format);
void SDLCALL SDL_Convert_S16_to_F32(SDL_AudioCVT *cvt, SDL_AudioFormat format);
void SDLCALL SDL_Convert_U16_to_F32(SDL_AudioCVT *cvt, SDL_AudioFormat format);
void SDLCALL SDL_Convert_S32_to_F32(SDL_AudioCVT *cvt, SDL_AudioFormat format);
void SDLCALL SDL_Convert_F32_to_S8(SDL_AudioCVT *cvt, SDL_AudioFormat format);
void SDLCALL SDL_Convert_F32_to_U8(SDL_AudioCVT *cvt, SDL_AudioFormat format);
void SDLCALL SDL_Convert_F32_to_S16(SDL_AudioCVT *cvt, SDL_AudioFormat format);
void SDLCALL SDL_Convert_F32_to_U16(SDL_AudioCVT *cvt, SDL_AudioFormat format);
void SDLCALL SDL_Convert_F32_to_S32(SDL_AudioCVT *cvt, SDL_AudioFormat format);
void SDL_Upsample_Arbitrary(SDL_AudioCVT *cvt, const int channels);
audio: More effort to improve and simplify audio resamplers.
2017-01-06 00:12:20 +00:00
void SDL_Upsample_Multiple(SDL_AudioCVT *cvt, const int channels);
Reworked audio converter code. This no longer uses a script to generate code for every possible type conversion or resampler. This caused a bloat in binary size and and compile times. Now we use a handful of more generic functions and assume staying in the CPU cache is the most important thing anyhow. This shrinks the size of the final build (in this case: macOS X amd64, -Os to optimize for size) by 15%. When compiling on a single core, build times drop by about 15% too (although the previous cost was largely hidden by multicore builds).
2016-11-05 06:34:38 +00:00
void SDL_Downsample_Arbitrary(SDL_AudioCVT *cvt, const int channels);
audio: More effort to improve and simplify audio resamplers.
2017-01-06 00:12:20 +00:00
void SDL_Downsample_Multiple(SDL_AudioCVT *cvt, const int channels);
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
audio: Added SDL_AudioStream. Non-power-of-two resampling now works!
2017-01-06 00:29:38 +00:00
/* SDL_AudioStream is a new audio conversion interface. It
might eventually become a public API.
The benefits vs SDL_AudioCVT:
- it can handle resampling data in chunks without generating
artifacts, when it doesn't have the complete buffer available.
- it can handle incoming data in any variable size.
- You push data as you have it, and pull it when you need it
(Note that currently this converts as data is put into the stream, so
you need to push more than a handful of bytes if you want decent
resampling. This can be changed later.)
*/
/* this is opaque to the outside world. */
typedef struct SDL_AudioStream SDL_AudioStream;
/* create a new stream */
SDL_AudioStream *SDL_NewAudioStream(const SDL_AudioFormat src_format,
const Uint8 src_channels,
const int src_rate,
const SDL_AudioFormat dst_format,
const Uint8 dst_channels,
const int dst_rate);
/* add data to be converted/resampled to the stream */
int SDL_AudioStreamPut(SDL_AudioStream *stream, const void *buf, const Uint32 len);
/* get converted/resampled data from the stream */
int SDL_AudioStreamGet(SDL_AudioStream *stream, Uint32 len, void *buf, const Uint32 buflen);
/* clear any pending data in the stream without converting it. */
void SDL_AudioStreamClear(SDL_AudioStream *stream);
/* number of converted/resampled bytes available */
int SDL_AudioStreamAvailable(SDL_AudioStream *stream);
/* dispose of a stream */
void SDL_FreeAudioStream(SDL_AudioStream *stream);
Patched to compile on some compilers.
2017-01-06 00:45:57 +00:00
#endif
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
/* vi: set ts=4 sw=4 expandtab: */