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examples: count the params as we add them

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Count the params as we add them to the param arrays and use that to
update the stream params instead of using hardcoded indexes and sizes.

This makes it easier to add params and it also revealed a miscounted
param.
This commit is contained in:
Wim Taymans 2025-09-19 13:07:19 +02:00
parent 83242a5c3c
commit b57c6d3729
15 changed files with 115 additions and 89 deletions
Download patch file Download diff file Expand all files Collapse all files

11
src/examples/video-play-fixate.c
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@ -297,6 +297,7 @@ on_stream_param_changed(void *_data, uint32_t id, const struct spa_pod *param)
uint8_t params_buffer[1024];
struct spa_pod_builder b = SPA_POD_BUILDER_INIT(params_buffer, sizeof(params_buffer));
const struct spa_pod *params[1];
uint32_t n_params = 0;
Uint32 sdl_format;
void *d;
@ -341,7 +342,7 @@ on_stream_param_changed(void *_data, uint32_t id, const struct spa_pod *param)
/* a SPA_TYPE_OBJECT_ParamBuffers object defines the acceptable size,
* number, stride etc of the buffers */
params[0] = spa_pod_builder_add_object(&b,
params[n_params++] = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_ParamBuffers, SPA_PARAM_Buffers,
SPA_PARAM_BUFFERS_buffers, SPA_POD_CHOICE_RANGE_Int(8, 2, MAX_BUFFERS),
SPA_PARAM_BUFFERS_blocks, SPA_POD_Int(1),
@ -350,7 +351,7 @@ on_stream_param_changed(void *_data, uint32_t id, const struct spa_pod *param)
SPA_PARAM_BUFFERS_dataType, SPA_POD_CHOICE_FLAGS_Int((1<<SPA_DATA_MemPtr) | (1<<SPA_DATA_DmaBuf)));
/* we are done */
pw_stream_update_params(stream, params, 1);
pw_stream_update_params(stream, params, n_params);
}
/* these are the stream events we listen for */
@ -369,14 +370,16 @@ static int build_formats(struct data *data, struct spa_pod_builder *b, const str
SDL_GetRendererInfo(data->renderer, &info);
if (data->mod_info[0].n_modifiers > 0) {
params[n_params++] = build_format(b, &info, SPA_VIDEO_FORMAT_RGB, data->mod_info[0].modifiers, data->mod_info[0].n_modifiers);
params[n_params++] = build_format(b,
&info, SPA_VIDEO_FORMAT_RGB,
data->mod_info[0].modifiers,
data->mod_info[0].n_modifiers);
}
params[n_params++] = build_format(b, &info, SPA_VIDEO_FORMAT_RGB, NULL, 0);
for (int i=0; i < n_params; i++) {
spa_debug_format(2, NULL, params[i]);
}
return n_params;
}