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Initial commit: TXW82x FPV v2.7.0.7-42229 SDK + project sources

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zouhaitao
2026-07-06 11:30:13 +08:00
commit e76462eeb7
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sdk/app/video_app/file_thumb.c Normal file
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#include "cjson/cjson.h"
#include "lib/fs/fatfs/osal_file.h"
#include "lib/heap/av_heap.h"
#include "lib/heap/av_psram_heap.h"
#include "vfs.h"
#include "file_thumb.h"
#include "file_common_api.h"
/*******************************************************************************
* 这个文件主要是为了读取图片和缩略图用的,所以文件路径是固定
*
******************************************************************************/
// data申请空间函数
#define STREAM_MALLOC av_psram_malloc
#define STREAM_FREE av_psram_free
#define STREAM_ZALLOC av_psram_zalloc
// 结构体申请空间函数
#define STREAM_LIBC_MALLOC av_malloc
#define STREAM_LIBC_FREE av_free
#define STREAM_LIBC_ZALLOC av_zalloc
#define HASH_MOD (9)
uint32_t calc_hash(const char *filename)
{
uint32_t hash = 0;
const char *h_name = (const char *) filename;
uint8_t t;
// 遇到'.'代表后缀名,则不需要计算了
while (*h_name && (*h_name) != '.')
{
t = tolower(*h_name);
hash = (hash + (hash << 2)) ^ t;
h_name++;
}
hash = hash % HASH_MOD;
return hash;
}
uint32_t calc_hash2(const char *filename, uint32_t *pre_name_len)
{
uint32_t hash = 0;
const char *h_name = (const char *) filename;
uint8_t t;
// 遇到'.'代表后缀名,则不需要计算了
while (*h_name && (*h_name) != '.')
{
t = tolower(*h_name);
hash = (hash + (hash << 2)) ^ t;
h_name++;
}
hash = hash % HASH_MOD;
if (pre_name_len)
{
*pre_name_len = h_name - filename;
}
return hash;
}
// pathsize后续可以用来判断是否越界的,现在没有用上
// path保存路径的buf
uint8_t gen_thumb_path(const char *filename, char *path, uint32_t pathsize)
{
uint32_t name_len;
const char *p;
p = strrchr(filename, ':');
if(!p)
{
p = filename;
}
else
{
p++;
}
filename = p;
p = strrchr(p, '/');
if(p)
{
p++;
}
else
{
p = filename;
}
filename = p;
uint32_t hash = calc_hash2(filename, &name_len);
os_sprintf((char *) path, THUMB_PATH "/%d/%s", hash, filename);
// 将后缀名修改成jpg
uint32_t offset = os_strlen(path) - os_strlen(filename) + name_len;
path[offset++] = '.';
path[offset++] = 'J';
path[offset++] = 'P';
path[offset++] = 'G';
os_printf("%s:%d\tpath:%s\n", __FUNCTION__, __LINE__, path);
return 0;
}
uint8_t gen_normal_jpg_path2(const char *filename, char *path, uint32_t pathsize)
{
uint32_t name_len;
calc_hash2(filename, &name_len);
os_sprintf((char *) path, IMG_PATH "/%s", filename);
// 将后缀名修改成jpg
uint32_t offset = os_strlen(path) - os_strlen(filename) + name_len;
path[offset++] = '.';
path[offset++] = 'J';
path[offset++] = 'P';
path[offset++] = 'G';
os_printf("%s:%d\tpath:%s\n", __FUNCTION__, __LINE__, path);
return 0;
}
void *jpg_file_read(const char *filename, uint8_t thumb, int32_t *filesize)
{
char path[128];
uint8_t *file_buf = NULL;
// 寻找缩略图
if (thumb)
{
// 得到缩略图的路径
gen_thumb_path(filename, path, sizeof(path));
}
else
{
gen_photo_path(filename, path, sizeof(path));
}
// 读取文件
// int fd = VFS_open((const char *)path,O_RDONLY);
F_FILE *fd = osal_fopen((const char *) path, "rb");
// if(fd >= 0)
if (fd)
{
//*filesize = VFS_fsize(fd);
*filesize = osal_fsize(fd);
os_printf("filesize:%d\tpath:%s\n", *filesize, path);
if (*filesize <= 0)
{
goto jpg_file_read_end;
}
file_buf = STREAM_MALLOC((*filesize));
os_printf("file_buf:%X\n", file_buf);
if (!file_buf)
{
goto jpg_file_read_end;
}
osal_fread(file_buf, 1, *filesize, fd);
osal_fclose(fd);
// VFS_read(fd,file_buf,*filesize);
// VFS_close(fd);
// fd = -1;
fd = NULL;
}
jpg_file_read_end:
// if(fd >= 0)
if (fd)
{
// VFS_close(fd);
osal_fclose(fd);
}
return file_buf;
}
// 可以释放在buf增加容错
void jpg_file_free(void *buf)
{
if (buf)
{
STREAM_FREE(buf);
}
}
/***********************************************
返回图片的json结构,返回某给后缀名字的文件
参数:search_dir:搜索的目录
extension_name:后缀名
gen_prefix:生成特定前缀
*count:返回array数量,因为这个返回是文件列表,所以有数量,
***********************************************/
cJSON *get_extension_json(const char *search_dir, const char *extension_name, const char *gen_prefix, int type, int *count)
{
// fs_dir_t *dir;
// struct dirent *dent;
cJSON *array_json = NULL;
cJSON *path_array = NULL;
int event_count = 0;
char path[128];
FILINFO *fil;
// DIR dh;
// dir = VFS_opendir(search_dir);
void *dir = osal_opendir((char *) search_dir);
if (dir)
{
path_array = cJSON_CreateArray();
do
{
// dent = VFS_readdir(dir);
fil = osal_readdir(dir);
if (fil)
{
if (osal_dirent_isdir(fil))
{
continue;
}
// 检查后缀名是否匹配
uint8_t extension_filename[16]; // 文件后缀名转换,统一大写
uint8_t extension_name_len = strlen(extension_name);
char *fname = osal_dirent_name(fil);
uint8_t filename_len = strlen(fname);
uint32_t filesize = osal_dirent_size(fil);
// 进行全部转换成大写
if (filename_len - extension_name_len > 0)
{
for (uint8_t i = 0; i < strlen(extension_name); i++)
{
extension_filename[i] = toupper(fname[filename_len - extension_name_len + i]);
}
// 后缀名匹配
if (memcmp(extension_name, extension_filename, extension_name_len) == 0)
{
array_json = cJSON_CreateObject();
os_sprintf((char *) path, "%s%s", gen_prefix, fname);
cJSON_AddItemToObject(array_json, "name", cJSON_CreateString(path));
cJSON_AddItemToObject(array_json, "size", cJSON_CreateNumber(filesize / 1024));
cJSON_AddItemToObject(array_json, "createtimestr", cJSON_CreateString("20250318103006"));
cJSON_AddItemToObject(array_json, "type", cJSON_CreateNumber(type));
// 加入到json
cJSON_AddItemToArray(path_array, array_json);
event_count++;
}
}
}
} while (fil);
// VFS_closedir(dir);
osal_closedir(dir);
}
*count = event_count;
return path_array;
}
char *photo_json_path()
{
cJSON *root = NULL;
cJSON *loop = NULL;
cJSON *event = NULL;
cJSON *path_array = NULL;
cJSON *info_array = cJSON_CreateArray();
cJSON *video_array = NULL;
char *json_str = NULL;
int event_count = 0;
// 视频这里默认先返回空数据
loop = cJSON_CreateObject();
cJSON_AddItemToObject(loop, "folder", cJSON_CreateString("loop"));
video_array = get_extension_json("0:" MAIN_PATH "/" NORMAL_PATH, MP4_EXTENSION_NAME, "loop/RECA/", 2, &event_count);
if (video_array)
{
cJSON_AddItemToObject(loop, "files", video_array);
cJSON_AddItemToObject(loop, "count", cJSON_CreateNumber(event_count));
}
event = cJSON_CreateObject();
cJSON_AddItemToObject(event, "folder", cJSON_CreateString("event"));
path_array = get_extension_json("0:" MAIN_PATH "/" NORMAL_PATH, JPG_EXTENSION_NAME, "event/IMGA/", 1, &event_count);
if (path_array)
{
cJSON_AddItemToObject(event, "files", path_array);
cJSON_AddItemToObject(event, "count", cJSON_CreateNumber(event_count));
}
cJSON_AddItemToArray(info_array, loop);
cJSON_AddItemToArray(info_array, event);
root = cJSON_CreateObject();
cJSON_AddItemToObject(root, "result", cJSON_CreateNumber(0));
cJSON_AddItemToObject(root, "info", info_array);
// 生成json数据
json_str = cJSON_PrintUnformatted(root);
cJSON_Delete(root);
return json_str;
}
void path_json_free(void *str)
{
if (str)
{
cJSON_free(str);
}
}