ijksdl源码分析1 - 欧阳兄弟

H:\code\ijkplayer-android\ijkmedia\ijksdl\ijksdl_stdinc.h

#ifndef IJKSDL__IJKSDL_STDINC_H
#define IJKSDL__IJKSDL_STDINC_H

#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>

typedef int8_t      Sint8;
typedef uint8_t     Uint8;
typedef int16_t     Sint16;
typedef uint16_t    Uint16;
typedef int32_t     Sint32;
typedef uint32_t    Uint32;
typedef int64_t     Sint64;
typedef uint64_t    Uint64;

char *SDL_getenv(const char *name);

#endif

H:\code\ijkplayer-android\ijkmedia\ijksdl\ijksdl_stdinc.c

#include "ijksdl_stdinc.h"

char *SDL_getenv(const char *name)
{
    return NULL;
}

包含标准库头文件,并定义一些要用的数据类型.

H:\code\ijkplayer-android\ijkmedia\ijksdl\ijksdl_mutex.h

H:\code\ijkplayer-android\ijkmedia\ijksdl\ijksdl_mutex.c

封装

SDL_mutex

SDL_cond结构体

H:\code\ijkplayer-android\ijkmedia\ijksdl\ijksdl_extra_log.c

H:\code\ijkplayer-android\ijkmedia\ijksdl\ijksdl_extra_log.h

#include "ijksdl_extra_log.h"
#include "ijksdl/android/ijksdl_android_jni.h"
#include <stdio.h>

#define LOG_BUF_SIZE    1024

#ifdef EXTRA_LOG_PRINT
void ffp_log_extra_print(int level, const char *tag, const char *fmt, ...)
{
    JNIEnv *env = NULL;

    if (JNI_OK != SDL_JNI_SetupThreadEnv(&env)) {
        return;
    }
    va_list ap;
    char log_buffer[LOG_BUF_SIZE] = {0};

    va_start(ap, fmt);
    vsnprintf(log_buffer, LOG_BUF_SIZE, fmt, ap);
    va_end(ap);
    switch (level) {
        case ANDROID_LOG_UNKNOWN:
        case ANDROID_LOG_DEFAULT:
        case ANDROID_LOG_VERBOSE:
            J4AC_BLog__v__withCString__catchAll(env, tag, log_buffer);
            break;
        case ANDROID_LOG_DEBUG:
            J4AC_BLog__d__withCString__catchAll(env, tag, log_buffer);
            break;
        case ANDROID_LOG_INFO:
            J4AC_BLog__i__withCString__catchAll(env, tag, log_buffer);
            break;
        case ANDROID_LOG_WARN:
            J4AC_BLog__w__withCString__catchAll(env, tag, log_buffer);
            break;
        case ANDROID_LOG_FATAL:
        case ANDROID_LOG_SILENT:
        case ANDROID_LOG_ERROR:
            J4AC_BLog__e__withCString__catchAll(env, tag, log_buffer);
            break;
        default:
            break;
    }
}

void ffp_log_extra_vprint(int level, const char *tag, const char *fmt, va_list ap)
{
    JNIEnv *env = NULL;
    if (JNI_OK != SDL_JNI_SetupThreadEnv(&env)) {
        return;
    }
    char log_buffer[LOG_BUF_SIZE] = {0};

    vsnprintf(log_buffer, LOG_BUF_SIZE, fmt, ap);
    switch (level) {
        case ANDROID_LOG_UNKNOWN:
        case ANDROID_LOG_DEFAULT:
        case ANDROID_LOG_VERBOSE:
            J4AC_BLog__v__withCString__catchAll(env, tag, log_buffer);
            break;
        case ANDROID_LOG_DEBUG:
            J4AC_BLog__d__withCString__catchAll(env, tag, log_buffer);
            break;
        case ANDROID_LOG_INFO:
            J4AC_BLog__i__withCString__catchAll(env, tag, log_buffer);
            break;
        case ANDROID_LOG_WARN:
            J4AC_BLog__w__withCString__catchAll(env, tag, log_buffer);
            break;
        case ANDROID_LOG_FATAL:
        case ANDROID_LOG_SILENT:
        case ANDROID_LOG_ERROR:
            J4AC_BLog__e__withCString__catchAll(env, tag, log_buffer);
            break;
        default:
            break;
    }
}
#endif  // EXTRA_LOG_PRINT

用 EXTRA_LOG_PRINT宏来控制编译

通过java成的 BLog类来实现功能

H:\code\ijkplayer-android\ijkmedia\ijksdl\ijksdl_misc.h

#ifndef IJKSDL__IJKSDL_MISC_H
#define IJKSDL__IJKSDL_MISC_H

#include <stdlib.h>
#include <memory.h>

#ifndef IJKMAX
#define IJKMAX(a, b)    ((a) > (b) ? (a) : (b))
#endif

#ifndef IJKMIN
#define IJKMIN(a, b)    ((a) < (b) ? (a) : (b))
#endif

#ifndef IJKALIGN
#define IJKALIGN(x, align) ((( x ) + (align) - 1) / (align) * (align))
#endif

#define IJK_CHECK_RET(condition__, retval__, ...) \
    if (!(condition__)) { \
        ALOGE(__VA_ARGS__); \
        return (retval__); \
    }

#ifndef NELEM
#define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
#endif

inline static void *mallocz(size_t size)
{
    void *mem = malloc(size);
    if (!mem)
        return mem;

    memset(mem, 0, size);
    return mem;
}

inline static void freep(void **mem)
{
    if (mem && *mem) {
        free(*mem);
        *mem = NULL;
    }
}

#endif

辅助函数,宏定义

H:\code\ijkplayer-android\ijkmedia\ijksdl\ijksdl_log.h

#ifndef IJKSDL__IJKSDL_LOG_H
#define IJKSDL__IJKSDL_LOG_H

#include <stdio.h>

#ifdef __ANDROID__

#include <android/log.h>
#include "ijksdl_extra_log.h"

#define IJK_LOG_UNKNOWN     ANDROID_LOG_UNKNOWN
#define IJK_LOG_DEFAULT     ANDROID_LOG_DEFAULT

#define IJK_LOG_VERBOSE     ANDROID_LOG_VERBOSE
#define IJK_LOG_DEBUG       ANDROID_LOG_DEBUG
#define IJK_LOG_INFO        ANDROID_LOG_INFO
#define IJK_LOG_WARN        ANDROID_LOG_WARN
#define IJK_LOG_ERROR       ANDROID_LOG_ERROR
#define IJK_LOG_FATAL       ANDROID_LOG_FATAL
#define IJK_LOG_SILENT      ANDROID_LOG_SILENT

#ifdef EXTRA_LOG_PRINT
#define VLOG(level, TAG, ...)    ffp_log_extra_vprint(level, TAG, __VA_ARGS__)
#define ALOG(level, TAG, ...)    ffp_log_extra_print(level, TAG, __VA_ARGS__)
#else
#define VLOG(level, TAG, ...)    ((void)__android_log_vprint(level, TAG, __VA_ARGS__))
#define ALOG(level, TAG, ...)    ((void)__android_log_print(level, TAG, __VA_ARGS__))
#endif

#else

#define IJK_LOG_UNKNOWN     0
#define IJK_LOG_DEFAULT     1

#define IJK_LOG_VERBOSE     2
#define IJK_LOG_DEBUG       3
#define IJK_LOG_INFO        4
#define IJK_LOG_WARN        5
#define IJK_LOG_ERROR       6
#define IJK_LOG_FATAL       7
#define IJK_LOG_SILENT      8

#define VLOG(level, TAG, ...)    ((void)vprintf(__VA_ARGS__))
#define ALOG(level, TAG, ...)    ((void)printf(__VA_ARGS__))

#endif

#define IJK_LOG_TAG "IJKMEDIA"

#define VLOGV(...)  VLOG(IJK_LOG_VERBOSE,   IJK_LOG_TAG, __VA_ARGS__)
#define VLOGD(...)  VLOG(IJK_LOG_DEBUG,     IJK_LOG_TAG, __VA_ARGS__)
#define VLOGI(...)  VLOG(IJK_LOG_INFO,      IJK_LOG_TAG, __VA_ARGS__)
#define VLOGW(...)  VLOG(IJK_LOG_WARN,      IJK_LOG_TAG, __VA_ARGS__)
#define VLOGE(...)  VLOG(IJK_LOG_ERROR,     IJK_LOG_TAG, __VA_ARGS__)

#define ALOGV(...)  ALOG(IJK_LOG_VERBOSE,   IJK_LOG_TAG, __VA_ARGS__)
#define ALOGD(...)  ALOG(IJK_LOG_DEBUG,     IJK_LOG_TAG, __VA_ARGS__)
#define ALOGI(...)  ALOG(IJK_LOG_INFO,      IJK_LOG_TAG, __VA_ARGS__)
#define ALOGW(...)  ALOG(IJK_LOG_WARN,      IJK_LOG_TAG, __VA_ARGS__)
#define ALOGE(...)  ALOG(IJK_LOG_ERROR,     IJK_LOG_TAG, __VA_ARGS__)
#define LOG_ALWAYS_FATAL(...)   do { ALOGE(__VA_ARGS__); exit(1); } while (0)

#endif

不同条件下日志函数的宏封装

H:\code\ijkplayer-android\ijkmedia\ijksdl\ijksdl_inc_internal.h

#ifndef IJKPLAYER__IJKSDL_INC_INTERNAL_H
#define IJKPLAYER__IJKSDL_INC_INTERNAL_H

#include <stdint.h>

#include "ijksdl_log.h"
#include "ijksdl_misc.h"
#include "ijksdl_stdinc.h"

#define SDLTRACE ALOGD

#endif

包含SDL库内部要用到的一些头文件

H:\code\ijkplayer-android\ijkmedia\ijksdl\ijksdl_gles2.h

#ifndef IJKSDL__IJKSDL_GLES2_H
#define IJKSDL__IJKSDL_GLES2_H

#ifdef __APPLE__
#include <OpenGLES/ES2/gl.h>
#include <OpenGLES/ES2/glext.h>
#else
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <GLES2/gl2platform.h>
#endif

typedef struct SDL_VoutOverlay SDL_VoutOverlay;

/*
 * Common
 */

#ifdef DEBUG
#define IJK_GLES2_checkError_TRACE(op)
#define IJK_GLES2_checkError_DEBUG(op)
#else
#define IJK_GLES2_checkError_TRACE(op) IJK_GLES2_checkError(op) 
#define IJK_GLES2_checkError_DEBUG(op) IJK_GLES2_checkError(op)
#endif

void IJK_GLES2_printString(const char *name, GLenum s);
void IJK_GLES2_checkError(const char *op);

GLuint IJK_GLES2_loadShader(GLenum shader_type, const char *shader_source);


/*
 * Renderer
 */
#define IJK_GLES2_MAX_PLANE 3
typedef struct IJK_GLES2_Renderer IJK_GLES2_Renderer;

IJK_GLES2_Renderer *IJK_GLES2_Renderer_create(SDL_VoutOverlay *overlay);
void      IJK_GLES2_Renderer_reset(IJK_GLES2_Renderer *renderer);
void      IJK_GLES2_Renderer_free(IJK_GLES2_Renderer *renderer);
void      IJK_GLES2_Renderer_freeP(IJK_GLES2_Renderer **renderer);

GLboolean IJK_GLES2_Renderer_setupGLES();
GLboolean IJK_GLES2_Renderer_isValid(IJK_GLES2_Renderer *renderer);
GLboolean IJK_GLES2_Renderer_isFormat(IJK_GLES2_Renderer *renderer, int format);
GLboolean IJK_GLES2_Renderer_use(IJK_GLES2_Renderer *renderer);
GLboolean IJK_GLES2_Renderer_renderOverlay(IJK_GLES2_Renderer *renderer, SDL_VoutOverlay *overlay);

#define IJK_GLES2_GRAVITY_RESIZE                (0) // Stretch to fill view bounds.
#define IJK_GLES2_GRAVITY_RESIZE_ASPECT         (1) // Preserve aspect ratio; fit within view bounds.
#define IJK_GLES2_GRAVITY_RESIZE_ASPECT_FILL    (2) // Preserve aspect ratio; fill view bounds.
GLboolean IJK_GLES2_Renderer_setGravity(IJK_GLES2_Renderer *renderer, int gravity, GLsizei view_width, GLsizei view_height);

#endif

1. 声明 SDL_VoutOverlay结构

2. IJK_GLES2_printString(const char *name, GLenum s)

输出 name 对应的值s

void IJK_GLES2_checkError(const char* op) {
    for (GLint error = glGetError(); error; error = glGetError()) {
        ALOGE("[GLES2] after %s() glError (0x%x)\n", op, error);
    }
}

void IJK_GLES2_printString(const char *name, GLenum s) {
    const char *v = (const char *) glGetString(s);
    ALOGI("[GLES2] %s = %s\n", name, v);
}

　3. IJK_GLES2_checkError(const char* op)

输出op后的错误值

4. IJK_GLES2_Renderer结构相关函数的声明

GLES2相关的文件都在gles2目录下.

发表于 2017-07-19 16:00 欧阳兄弟阅读(926) 评论(0) 编辑收藏举报