diff options
Diffstat (limited to 'src/encoder/video/software.c')
| -rw-r--r-- | src/encoder/video/software.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/src/encoder/video/software.c b/src/encoder/video/software.c new file mode 100644 index 0000000..f3b311e --- /dev/null +++ b/src/encoder/video/software.c @@ -0,0 +1,137 @@ +#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.hdr ? 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 *encoder_software = 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(encoder_software, video_codec_context, frame)) { + gsr_video_encoder_software_stop(encoder_software, 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_video_encoder_software *encoder_software = encoder->priv; + // TODO: hdr support + const unsigned int formats[2] = { GL_RED, GL_RG }; + for(int i = 0; i < 2; ++i) { + encoder_software->params.egl->glBindTexture(GL_TEXTURE_2D, encoder_software->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. + encoder_software->params.egl->glGetTexImage(GL_TEXTURE_2D, 0, formats[i], GL_UNSIGNED_BYTE, frame->data[i]); + } + encoder_software->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); +} + +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 *encoder_software = encoder->priv; + textures[0] = encoder_software->target_textures[0]; + textures[1] = encoder_software->target_textures[1]; + *num_textures = 2; + *destination_color = encoder_software->params.hdr ? 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; +} |