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testcamera: added support for Motion JPEG camera frames

This commit is contained in:
Sam Lantinga 2025-02-10 16:43:48 -08:00
parent cf41ccc6ce
commit 5ccee77190
4 changed files with 8014 additions and 3 deletions
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1
build-scripts/check_stdlib_usage.py
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@ -164,6 +164,7 @@ def find_symbols_in_file(file: pathlib.Path) -> int:
"include/SDL3", "include/SDL3",
"build-scripts/gen_audio_resampler_filter.c", "build-scripts/gen_audio_resampler_filter.c",
"build-scripts/gen_audio_channel_conversion.c", "build-scripts/gen_audio_channel_conversion.c",
"test/stb_image.h",
"test/win32/sdlprocdump.c", "test/win32/sdlprocdump.c",
] ]

2
test/CMakeLists.txt
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@ -392,7 +392,7 @@ add_sdl_test_executable(teststreaming NEEDS_RESOURCES TESTUTILS SOURCES teststre
add_sdl_test_executable(testtimer NONINTERACTIVE NONINTERACTIVE_ARGS --no-interactive NONINTERACTIVE_TIMEOUT 60 SOURCES testtimer.c) add_sdl_test_executable(testtimer NONINTERACTIVE NONINTERACTIVE_ARGS --no-interactive NONINTERACTIVE_TIMEOUT 60 SOURCES testtimer.c)
add_sdl_test_executable(testurl SOURCES testurl.c) add_sdl_test_executable(testurl SOURCES testurl.c)
add_sdl_test_executable(testver NONINTERACTIVE NOTRACKMEM SOURCES testver.c) add_sdl_test_executable(testver NONINTERACTIVE NOTRACKMEM SOURCES testver.c)
add_sdl_test_executable(testcamera MAIN_CALLBACKS SOURCES testcamera.c) add_sdl_test_executable(testcamera MAIN_CALLBACKS NO_C90 SOURCES testcamera.c)
add_sdl_test_executable(testclipboard MAIN_CALLBACKS SOURCES testclipboard.c ${icon_bmp_header} DEPENDS generate-icon_bmp_header) add_sdl_test_executable(testclipboard MAIN_CALLBACKS SOURCES testclipboard.c ${icon_bmp_header} DEPENDS generate-icon_bmp_header)
add_sdl_test_executable(testviewport NEEDS_RESOURCES TESTUTILS SOURCES testviewport.c) add_sdl_test_executable(testviewport NEEDS_RESOURCES TESTUTILS SOURCES testviewport.c)
add_sdl_test_executable(testwm SOURCES testwm.c) add_sdl_test_executable(testwm SOURCES testwm.c)

7988
test/stb_image.h Normal file
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File diff suppressed because it is too large Load Diff

26
test/testcamera.c
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@ -15,6 +15,12 @@
#include <SDL3/SDL_test.h> #include <SDL3/SDL_test.h>
#include <SDL3/SDL_test_common.h> #include <SDL3/SDL_test_common.h>
#define STB_IMAGE_IMPLEMENTATION
#define STBI_ONLY_JPEG
#define STBI_NO_HDR
#define STBI_NO_LINEAR
#include "stb_image.h"
static SDL_Window *window = NULL; static SDL_Window *window = NULL;
static SDL_Renderer *renderer = NULL; static SDL_Renderer *renderer = NULL;
static SDLTest_CommonState *state = NULL; static SDLTest_CommonState *state = NULL;
@ -343,7 +349,11 @@ SDL_AppResult SDL_AppIterate(void *appstate)
/* Create texture with appropriate format */ /* Create texture with appropriate format */
SDL_PropertiesID props = SDL_CreateProperties(); SDL_PropertiesID props = SDL_CreateProperties();
SDL_SetNumberProperty(props, SDL_PROP_TEXTURE_CREATE_FORMAT_NUMBER, frame_current->format); if (frame_current->format == SDL_PIXELFORMAT_MJPG) {
SDL_SetNumberProperty(props, SDL_PROP_TEXTURE_CREATE_FORMAT_NUMBER, SDL_PIXELFORMAT_RGBA32);
} else {
SDL_SetNumberProperty(props, SDL_PROP_TEXTURE_CREATE_FORMAT_NUMBER, frame_current->format);
}
SDL_SetNumberProperty(props, SDL_PROP_TEXTURE_CREATE_COLORSPACE_NUMBER, colorspace); SDL_SetNumberProperty(props, SDL_PROP_TEXTURE_CREATE_COLORSPACE_NUMBER, colorspace);
SDL_SetNumberProperty(props, SDL_PROP_TEXTURE_CREATE_ACCESS_NUMBER, SDL_TEXTUREACCESS_STREAMING); SDL_SetNumberProperty(props, SDL_PROP_TEXTURE_CREATE_ACCESS_NUMBER, SDL_TEXTUREACCESS_STREAMING);
SDL_SetNumberProperty(props, SDL_PROP_TEXTURE_CREATE_WIDTH_NUMBER, frame_current->w); SDL_SetNumberProperty(props, SDL_PROP_TEXTURE_CREATE_WIDTH_NUMBER, frame_current->w);
@ -358,7 +368,19 @@ SDL_AppResult SDL_AppIterate(void *appstate)
/* Update SDL_Texture with last video frame (only once per new frame) */ /* Update SDL_Texture with last video frame (only once per new frame) */
if (frame_current && !texture_updated) { if (frame_current && !texture_updated) {
SDL_UpdateTexture(texture, NULL, frame_current->pixels, frame_current->pitch); if (frame_current->format == SDL_PIXELFORMAT_MJPG) {
/* Note: This is very slow if compiled without optimizations */
int w = 0, h = 0, format = 0;
stbi_uc *pixels = stbi_load_from_memory(frame_current->pixels, frame_current->pitch, &w, &h, &format, 4);
if (pixels) {
SDL_UpdateTexture(texture, NULL, pixels, frame_current->w * 4);
stbi_image_free(pixels);
} else {
SDL_Log("Couldn't decode JPEG: %s", stbi_failure_reason());
}
} else {
SDL_UpdateTexture(texture, NULL, frame_current->pixels, frame_current->pitch);
}
texture_updated = true; texture_updated = true;
} }