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RaspiStill example code for YUV fast paths

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Update RaspiStill framework to provide access to the new EGL image
targets that provide a fastpath for mapping the individual YUV planes to
one byte per pixel GL_LUMINANCE buffers. These are still accessed as OES
textures so this is effectively a greyscale image created from a single
plane of a MMAL buffer.

Also added some example code (yuv, sobel) that demonstrates how to use
the new EGL image targets.

Also, add -gc to the command line to capture the GL frame-buffer as a TGA file.

Thanks to Tim Gover
This commit is contained in:
Dom Cobley
2013-11-28 22:22:10 +00:00
parent 40f174657f
commit d2c9f912da
28 changed files with 1442 additions and 350 deletions
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49
host_applications/linux/apps/raspicam/RaspiTexUtil.h
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@@ -26,8 +26,8 @@ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef RASPITEX_UTIL_H
#define RASPITEX_UTIL_H
#ifndef RASPITEX_UTIL_H_
#define RASPITEX_UTIL_H_
#define VCOS_LOG_CATEGORY (&raspitex_log_category)
#include <math.h>
@@ -41,6 +41,34 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
extern VCOS_LOG_CAT_T raspitex_log_category;
#define SHADER_MAX_ATTRIBUTES 16
#define SHADER_MAX_UNIFORMS 16
/**
* Container for a simple shader program. The uniform and attribute locations
* are automatically setup by raspitex_build_shader_program.
*/
typedef struct RASPITEXUTIL_SHADER_PROGRAM_T
{
const char *vertex_source; /// Pointer to vertex shader source
const char *fragment_source; /// Pointer to fragment shader source
/// Array of uniform names for raspitex_build_shader_program to process
const char *uniform_names[SHADER_MAX_UNIFORMS];
/// Array of attribute names for raspitex_build_shader_program to process
const char *attribute_names[SHADER_MAX_ATTRIBUTES];
GLint vs; /// Vertex shader handle
GLint fs; /// Fragment shader handle
GLint program; /// Shader program handle
/// The locations for uniforms defined in uniform_names
GLint uniform_locations[SHADER_MAX_UNIFORMS];
/// The locations for attributes defined in attribute_names
GLint attribute_locations[SHADER_MAX_ATTRIBUTES];
} RASPITEXUTIL_SHADER_PROGRAM_T;
/* Uncomment to enable extra GL error checking */
//#define CHECK_GL_ERRORS
#if defined(CHECK_GL_ERRORS)
@@ -50,7 +78,7 @@ do { \
X; \
while ((err = glGetError())) \
{ \
vcos_log_trace("GL error 0x%x in " #X "file %s line %d", err, __FILE__,__LINE__); \
vcos_log_error("GL error 0x%x in " #X "file %s line %d", err, __FILE__,__LINE__); \
vcos_assert(err == GL_NO_ERROR); \
exit(err); \
} \
@@ -68,8 +96,21 @@ int raspitexutil_update_model(RASPITEX_STATE* raspitex_state);
int raspitexutil_redraw(RASPITEX_STATE* raspitex_state);
void raspitexutil_gl_term(RASPITEX_STATE *raspitex_state);
void raspitexutil_destroy_native_window(RASPITEX_STATE *raspitex_state);
int raspitexutil_create_textures(RASPITEX_STATE *raspitex_state);
int raspitexutil_update_texture(RASPITEX_STATE *raspitex_state,
EGLClientBuffer mm_buf);
int raspitexutil_update_y_texture(RASPITEX_STATE *raspitex_state,
EGLClientBuffer mm_buf);
int raspitexutil_update_u_texture(RASPITEX_STATE *raspitex_state,
EGLClientBuffer mm_buf);
int raspitexutil_update_v_texture(RASPITEX_STATE *raspitex_state,
EGLClientBuffer mm_buf);
int raspitexutil_capture_bgra(struct RASPITEX_STATE *state,
uint8_t **buffer, size_t *buffer_size);
void raspitexutil_close(RASPITEX_STATE* raspitex_state);
#endif /* RASPITEX_UTIL_H */
/* Utility functions */
int raspitexutil_build_shader_program(RASPITEXUTIL_SHADER_PROGRAM_T *p);
void raspitexutil_brga_to_rgba(uint8_t *buffer, size_t size);
#endif /* RASPITEX_UTIL_H_ */