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examples: improve examples

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This commit is contained in:
Wim Taymans 2019-01-31 11:58:35 +01:00
parent 31dacd9d6f
commit 550a2af044
4 changed files with 106 additions and 25 deletions
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9
src/examples/sdl.h
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@ -103,14 +103,21 @@ static struct spa_pod *sdl_build_formats(SDL_RendererInfo *info, struct spa_pod_
uint32_t i, c;
struct spa_pod_frame f[2];
/* make an oject of type SPA_TYPE_OBJECT_Format and id SPA_PARAM_EnumFormat.
* The object type is important because it defines the properties that are
* acceptable. The id gives more context about what the object is meant to
* contain. In this case we enumerate supported formats. */
spa_pod_builder_push_object(b, &f[0], SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat);
/* add media type and media subtype properties */
spa_pod_builder_prop(b, SPA_FORMAT_mediaType, 0);
spa_pod_builder_id(b, SPA_MEDIA_TYPE_video);
spa_pod_builder_prop(b, SPA_FORMAT_mediaSubtype, 0);
spa_pod_builder_id(b, SPA_MEDIA_SUBTYPE_raw);
/* build an enumeration of formats */
spa_pod_builder_prop(b, SPA_FORMAT_VIDEO_format, 0);
spa_pod_builder_push_choice(b, &f[1], SPA_CHOICE_Enum, 0);
/* first the formats supported by the textures */
for (i = 0, c = 0; i < info->num_texture_formats; i++) {
uint32_t id = sdl_format_to_id(info->texture_formats[i]);
if (id == 0)
@ -119,12 +126,14 @@ static struct spa_pod *sdl_build_formats(SDL_RendererInfo *info, struct spa_pod_
spa_pod_builder_id(b, id);
spa_pod_builder_id(b, id);
}
/* then all the other ones SDL can convert from/to */
for (i = 0; i < SPA_N_ELEMENTS(sdl_video_formats); i++) {
uint32_t id = sdl_video_formats[i].id;
if (id != SPA_VIDEO_FORMAT_UNKNOWN)
spa_pod_builder_id(b, id);
}
spa_pod_builder_pop(b, &f[1]);
/* add size and framerate ranges */
spa_pod_builder_add(b,
SPA_FORMAT_VIDEO_size, SPA_POD_CHOICE_RANGE_Rectangle(
&SPA_RECTANGLE(WIDTH, HEIGHT),