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[867/906] glupload: Add GRAY8/GRAY16LE/BE upload support to glimagesink

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the 16bit data is uploaded as LUMINANCE_ALPHA, then expanded, composed
in shader. value weight is a little complicate, high byte weight is
255*256/65535 (denormalize to [0~255] ,shift to high byte,then normalize
to [0~1]), low byte weight is 255/65535(similar)

https://bugzilla.gnome.org/show_bug.cgi?id=722670
This commit is contained in:
Wang Xin-yu (王昕宇) 2014-01-17 08:46:02 +08:00 committed by Tim-Philipp Müller
parent 95833db905
commit 5168d86d9e
2 changed files with 93 additions and 1 deletions
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91
gst-libs/gst/gl/gstglupload.c
View file

@ -143,6 +143,31 @@ static const char *frag_REORDER_opengl = {
"}"
};
/** GRAY16 to RGB conversion
* data transfered as GL_LUMINANCE_ALPHA then convert back to GRAY16
* high byte weight as : 255*256/65535
* ([0~1] denormalize to [0~255],shift to high byte,normalize to [0~1])
* low byte weight as : 255/65535 (similar)
* */
#define COMPOSE_WEIGHT \
"const vec2 compose_weight = vec2(0.996109, 0.003891);\n"
/* Compose LUMINANCE/ALPHA as 8bit-8bit value */
static const char *frag_COMPOSE_opengl = {
"uniform sampler2D tex;\n"
"uniform vec2 tex_scale0;\n"
"uniform vec2 tex_scale1;\n"
"uniform vec2 tex_scale2;\n"
COMPOSE_WEIGHT
"void main(void)\n"
"{\n"
" vec4 t = texture2D(tex, gl_TexCoord[0].xy);\n"
" float value = dot(t.%c%c, compose_weight);"
" gl_FragColor = vec4(value, value, value, 1.0);\n"
"}"
};
/* Direct fragments copy with stride-scaling */
static const char *frag_COPY_opengl = {
"uniform sampler2D tex;\n"
@ -196,6 +221,28 @@ static const char *frag_REORDER_gles2 = {
"}"
};
/** GRAY16 to RGB conversion
* data transfered as GL_LUMINANCE_ALPHA then convert back to GRAY16
* high byte weight as : 255*256/65535
* ([0~1] denormalize to [0~255],shift to high byte,normalize to [0~1])
* low byte weight as : 255/65535 (similar)
* */
static const char *frag_COMPOSE_gles2 = {
"precision mediump float;\n"
"varying vec2 v_texcoord;\n"
"uniform sampler2D tex;\n"
"uniform vec2 tex_scale0;\n"
"uniform vec2 tex_scale1;\n"
"uniform vec2 tex_scale2;\n"
COMPOSE_WEIGHT
"void main(void)\n"
"{\n"
" vec4 t = texture2D(tex, v_texcoord);\n"
" float value = dot(t.%c%c, compose_weight);"
" gl_FragColor = vec4(value, value, value, 1.0);\n"
"}"
};
static const char *frag_AYUV_gles2 = {
"precision mediump float;\n"
"varying vec2 v_texcoord;\n"
@ -322,6 +369,7 @@ struct _GstGLUploadPrivate
const gchar *NV12_NV21;
const gchar *REORDER;
const gchar *COPY;
const gchar *COMPOSE;
const gchar *vert_shader;
gboolean (*draw) (GstGLContext * context, GstGLUpload * download);
@ -398,6 +446,7 @@ gst_gl_upload_new (GstGLContext * context)
priv->PLANAR_YUV = frag_PLANAR_YUV_opengl;
priv->AYUV = frag_AYUV_opengl;
priv->REORDER = frag_REORDER_opengl;
priv->COMPOSE = frag_COMPOSE_opengl;
priv->COPY = frag_COPY_opengl;
priv->NV12_NV21 = frag_NV12_NV21_opengl;
priv->vert_shader = text_vertex_shader_opengl;
@ -410,6 +459,7 @@ gst_gl_upload_new (GstGLContext * context)
priv->PLANAR_YUV = frag_PLANAR_YUV_gles2;
priv->AYUV = frag_AYUV_gles2;
priv->REORDER = frag_REORDER_gles2;
priv->COMPOSE = frag_COMPOSE_gles2;
priv->COPY = frag_COPY_gles2;
priv->NV12_NV21 = frag_NV12_NV21_gles2;
priv->vert_shader = text_vertex_shader_gles2;
@ -1017,6 +1067,17 @@ _init_upload (GstGLContext * context, GstGLUpload * upload)
free_frag_prog = TRUE;
upload->priv->n_textures = 1;
break;
case GST_VIDEO_FORMAT_GRAY16_BE:
frag_prog = g_strdup_printf (upload->priv->COMPOSE, 'r', 'a');
free_frag_prog = TRUE;
upload->priv->n_textures = 1;
break;
case GST_VIDEO_FORMAT_GRAY16_LE:
frag_prog = g_strdup_printf (upload->priv->COMPOSE, 'a', 'r');
free_frag_prog = TRUE;
upload->priv->n_textures = 1;
break;
case GST_VIDEO_FORMAT_GRAY8:
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_RGBA:
@ -1230,6 +1291,21 @@ _do_upload_make (GstGLContext * context, GstGLUpload * upload)
tex[0].width = in_width;
tex[0].height = in_height;
break;
case GST_VIDEO_FORMAT_GRAY8:
tex[0].internal_format = GL_LUMINANCE;
tex[0].format = GL_LUMINANCE;
tex[0].type = GL_UNSIGNED_BYTE;
tex[0].width = in_width;
tex[0].height = in_height;
break;
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
tex[0].internal_format = GL_LUMINANCE_ALPHA;
tex[0].format = GL_LUMINANCE_ALPHA;
tex[0].type = GL_UNSIGNED_BYTE;
tex[0].width = in_width;
tex[0].height = in_height;
break;
case GST_VIDEO_FORMAT_YUY2:
tex[0].internal_format = GL_LUMINANCE_ALPHA;
tex[0].format = GL_LUMINANCE_ALPHA;
@ -1372,6 +1448,15 @@ _do_upload_fill (GstGLContext * context, GstGLUpload * upload)
gl->BindTexture (GL_TEXTURE_2D, upload->in_texture[0]);
switch (v_format) {
case GST_VIDEO_FORMAT_GRAY8:
gl->TexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, in_width, in_height,
GL_LUMINANCE, GL_UNSIGNED_BYTE, upload->data[0]);
break;
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
gl->TexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, in_width, in_height,
GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, upload->data[0]);
break;
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR:
gl->TexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, in_width, in_height,
@ -1570,6 +1655,9 @@ _do_upload_draw_opengl (GstGLContext * context, GstGLUpload * upload)
gl->Clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
switch (v_format) {
case GST_VIDEO_FORMAT_GRAY8:
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:
@ -1717,6 +1805,9 @@ _do_upload_draw_gles2 (GstGLContext * context, GstGLUpload * upload)
gl->Clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
switch (v_format) {
case GST_VIDEO_FORMAT_GRAY8:
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:

3
gst-libs/gst/gl/gstglupload.h
View file

@ -90,7 +90,8 @@ struct _GstGLUploadClass
*/
#define GST_GL_UPLOAD_FORMATS "{ RGB, RGBx, RGBA, BGR, BGRx, BGRA, xRGB, " \
"xBGR, ARGB, ABGR, Y444, I420, YV12, Y42B, " \
"Y41B, NV12, NV21, YUY2, UYVY, AYUV }"
"Y41B, NV12, NV21, YUY2, UYVY, AYUV, " \
"GRAY8, GRAY16_LE, GRAY16_BE }"
/**
* GST_GL_UPLOAD_VIDEO_CAPS: