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#include "../../../include/encoder/video/software.h"
#include "../../../include/egl.h"
#include <libavcodec/avcodec.h>
#include <libavutil/frame.h>
#include <stdlib.h>
#define LINESIZE_ALIGNMENT 4
typedef struct {
gsr_video_encoder_software_params params;
unsigned int target_textures[2];
} gsr_video_encoder_software;
static unsigned int gl_create_texture(gsr_egl *egl, int width, int height, int internal_format, unsigned int format) {
unsigned int texture_id = 0;
egl->glGenTextures(1, &texture_id);
egl->glBindTexture(GL_TEXTURE_2D, texture_id);
egl->glTexImage2D(GL_TEXTURE_2D, 0, internal_format, width, height, 0, format, GL_UNSIGNED_BYTE, NULL);
egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
egl->glBindTexture(GL_TEXTURE_2D, 0);
return texture_id;
}
static bool gsr_video_encoder_software_setup_textures(gsr_video_encoder_software *self, AVCodecContext *video_codec_context, AVFrame *frame) {
int res = av_frame_get_buffer(frame, LINESIZE_ALIGNMENT);
if(res < 0) {
fprintf(stderr, "gsr error: gsr_video_encoder_software_setup_textures: av_frame_get_buffer failed: %d\n", res);
return false;
}
res = av_frame_make_writable(frame);
if(res < 0) {
fprintf(stderr, "gsr error: gsr_video_encoder_software_setup_textures: av_frame_make_writable failed: %d\n", res);
return false;
}
const unsigned int internal_formats_nv12[2] = { GL_R8, GL_RG8 };
const unsigned int internal_formats_p010[2] = { GL_R16, GL_RG16 };
const unsigned int formats[2] = { GL_RED, GL_RG };
const int div[2] = {1, 2}; // divide UV texture size by 2 because chroma is half size
for(int i = 0; i < 2; ++i) {
self->target_textures[i] = gl_create_texture(self->params.egl, video_codec_context->width / div[i], video_codec_context->height / div[i], self->params.color_depth == GSR_COLOR_DEPTH_8_BITS ? internal_formats_nv12[i] : internal_formats_p010[i], formats[i]);
if(self->target_textures[i] == 0) {
fprintf(stderr, "gsr error: gsr_capture_kms_setup_cuda_textures: failed to create opengl texture\n");
return false;
}
}
return true;
}
static void gsr_video_encoder_software_stop(gsr_video_encoder_software *self, AVCodecContext *video_codec_context);
static bool gsr_video_encoder_software_start(gsr_video_encoder *encoder, AVCodecContext *video_codec_context, AVFrame *frame) {
gsr_video_encoder_software *self = encoder->priv;
video_codec_context->width = FFALIGN(video_codec_context->width, LINESIZE_ALIGNMENT);
video_codec_context->height = FFALIGN(video_codec_context->height, 2);
frame->width = video_codec_context->width;
frame->height = video_codec_context->height;
if(!gsr_video_encoder_software_setup_textures(self, video_codec_context, frame)) {
gsr_video_encoder_software_stop(self, video_codec_context);
return false;
}
return true;
}
void gsr_video_encoder_software_stop(gsr_video_encoder_software *self, AVCodecContext *video_codec_context) {
(void)video_codec_context;
self->params.egl->glDeleteTextures(2, self->target_textures);
self->target_textures[0] = 0;
self->target_textures[1] = 0;
}
static void gsr_video_encoder_software_copy_textures_to_frame(gsr_video_encoder *encoder, AVFrame *frame, gsr_color_conversion *color_conversion) {
gsr_video_encoder_software *self = encoder->priv;
// TODO: hdr support
const unsigned int formats[2] = { GL_RED, GL_RG };
for(int i = 0; i < 2; ++i) {
self->params.egl->glBindTexture(GL_TEXTURE_2D, self->target_textures[i]);
// We could use glGetTexSubImage and then we wouldn't have to use a specific linesize (LINESIZE_ALIGNMENT) that adds padding,
// but glGetTexSubImage is only available starting from opengl 4.5.
self->params.egl->glGetTexImage(GL_TEXTURE_2D, 0, formats[i], GL_UNSIGNED_BYTE, frame->data[i]);
}
self->params.egl->glBindTexture(GL_TEXTURE_2D, 0);
// cap_kms->kms.base.egl->eglSwapBuffers(cap_kms->kms.base.egl->egl_display, cap_kms->kms.base.egl->egl_surface);
self->params.egl->glFlush();
self->params.egl->glFinish();
}
static void gsr_video_encoder_software_get_textures(gsr_video_encoder *encoder, unsigned int *textures, int *num_textures, gsr_destination_color *destination_color) {
gsr_video_encoder_software *self = encoder->priv;
textures[0] = self->target_textures[0];
textures[1] = self->target_textures[1];
*num_textures = 2;
*destination_color = self->params.color_depth == GSR_COLOR_DEPTH_10_BITS ? GSR_DESTINATION_COLOR_P010 : GSR_DESTINATION_COLOR_NV12;
}
static void gsr_video_encoder_software_destroy(gsr_video_encoder *encoder, AVCodecContext *video_codec_context) {
gsr_video_encoder_software_stop(encoder->priv, video_codec_context);
free(encoder->priv);
free(encoder);
}
gsr_video_encoder* gsr_video_encoder_software_create(const gsr_video_encoder_software_params *params) {
gsr_video_encoder *encoder = calloc(1, sizeof(gsr_video_encoder));
if(!encoder)
return NULL;
gsr_video_encoder_software *encoder_software = calloc(1, sizeof(gsr_video_encoder_software));
if(!encoder_software) {
free(encoder);
return NULL;
}
encoder_software->params = *params;
*encoder = (gsr_video_encoder) {
.start = gsr_video_encoder_software_start,
.copy_textures_to_frame = gsr_video_encoder_software_copy_textures_to_frame,
.get_textures = gsr_video_encoder_software_get_textures,
.destroy = gsr_video_encoder_software_destroy,
.priv = encoder_software
};
return encoder;
}
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