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video-play: handle arbitrary cursor sizes

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video-play: only allocate the texture when we know the size and
format of the cursor bitmap.
video-src: make cursor size defined with constants.
This commit is contained in:
Wim Taymans 2018-11-30 12:09:31 +01:00
parent ac5f0b851d
commit 537399bbe5
2 changed files with 46 additions and 22 deletions
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41
src/examples/video-src.c
View file

@ -36,6 +36,9 @@
#define WIDTH 320
#define HEIGHT 200
#define CROP 8
#define CURSOR_WIDTH 64
#define CURSOR_HEIGHT 64
#define CURSOR_BPP 4
#define M_PI_M2 ( M_PI + M_PI )
@ -60,6 +63,24 @@ struct data {
double accumulator;
};
static void draw_elipse(uint32_t *dst, int width, int height, uint32_t color)
{
int i, j, r1, r2, r12, r22, r122;
r1 = width/2;
r12 = r1 * r1;
r2 = height/2;
r22 = r2 * r2;
r122 = r12 * r22;
for (i = -r2; i < r2; i++) {
for (j = -r1; j < r1; j++) {
dst[(i + r2)*width+(j+r1)] =
(i * i * r12 + j * j * r22 <= r122) ? color : 0x00000000;
}
}
}
static void on_timeout(void *userdata, uint64_t expirations)
{
struct data *data = userdata;
@ -126,21 +147,16 @@ static void on_timeout(void *userdata, uint64_t expirations)
mb = SPA_MEMBER(mcs, mcs->bitmap_offset, struct spa_meta_bitmap);
mb->format = SPA_VIDEO_FORMAT_ARGB;
mb->size.width = 64;
mb->size.height = 64;
mb->stride = 64 * 4;
mb->size.width = CURSOR_WIDTH;
mb->size.height = CURSOR_HEIGHT;
mb->stride = CURSOR_WIDTH * CURSOR_BPP;
mb->offset = sizeof(struct spa_meta_bitmap);
bitmap = SPA_MEMBER(mb, mb->offset, uint32_t);
color = (cos(data->accumulator) + 1.0) * (1 << 23);
color |= 0xff000000;
for (i = 0; i < mb->size.height; i++) {
for (j = 0; j < mb->size.width; j++) {
int v = (i - 32) * (i - 32) + (j - 32) * (j - 32);
bitmap[i*64+j] = (v <= 32*32) ? color : 0x00000000;
}
}
draw_elipse(bitmap, mb->size.width, mb->size.height, color);
}
for (i = 0; i < data->format.size.height; i++) {
@ -236,12 +252,13 @@ on_stream_format_changed(void *_data, const struct spa_pod *format)
SPA_PARAM_META_type, &SPA_POD_Id(SPA_META_VideoCrop),
SPA_PARAM_META_size, &SPA_POD_Int(sizeof(struct spa_meta_region)),
0);
#define CURSOR_META_SIZE(w,h) (sizeof(struct spa_meta_cursor) + \
sizeof(struct spa_meta_bitmap) + w * h * CURSOR_BPP)
params[4] = spa_pod_builder_object(&b,
SPA_TYPE_OBJECT_ParamMeta, SPA_PARAM_Meta,
SPA_PARAM_META_type, &SPA_POD_Id(SPA_META_Cursor),
SPA_PARAM_META_size, &SPA_POD_Int(sizeof(struct spa_meta_cursor) +
sizeof(struct spa_meta_bitmap) +
64 * 64 * 4),
SPA_PARAM_META_size, &SPA_POD_Int(
CURSOR_META_SIZE(CURSOR_WIDTH,CURSOR_HEIGHT)),
0);
pw_stream_finish_format(stream, 0, params, 5);