102 lines
3.6 KiB
Diff
102 lines
3.6 KiB
Diff
From 6b022ae4b58af7a069a422d346f102bf18684249 Mon Sep 17 00:00:00 2001
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From: columbarius <co1umbarius@protonmail.com>
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Date: Sat, 21 Jan 2023 08:45:38 +0100
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Subject: [PATCH] pipewire: calc spa buffer size
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Modern GPUs might support a lot of modifiers. As such the hardcoded size
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for the ENUM_Formats PipeWire params are not enough and we should
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calculate the required size manually.
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Added logs if a ENUM_Format can't be assembled, which happens when the
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buffer size was not large enough.
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---
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plugins/linux-pipewire/pipewire.c | 47 +++++++++++++++++++++++++++++--
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1 file changed, 45 insertions(+), 2 deletions(-)
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diff --git a/plugins/linux-pipewire/pipewire.c b/plugins/linux-pipewire/pipewire.c
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index d639e86df0f25..e7a941d778b04 100644
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--- a/plugins/linux-pipewire/pipewire.c
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+++ b/plugins/linux-pipewire/pipewire.c
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@@ -144,6 +144,41 @@ static void update_pw_versions(obs_pipewire *obs_pw, const char *version)
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blog(LOG_WARNING, "[pipewire] failed to parse server version");
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}
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+static uint32_t calc_spa_enumformat_buffer_size(obs_pipewire *obs_pw)
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+{
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+ // from spa/pod/pod.h
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+ uint32_t spa_pod_object_size = sizeof(struct spa_pod_object);
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+ uint32_t spa_pod_prop_size = sizeof(struct spa_pod_prop);
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+ uint32_t spa_pod_value_size = 1 * sizeof(uint64_t);
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+ uint32_t spa_pod_choice_size = 2 * sizeof(uint64_t);
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+ // This is counted from the build_format function
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+ uint32_t n_objects = 0;
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+ uint32_t n_props = 0;
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+ uint32_t n_values = 0;
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+ uint32_t n_choices = 0;
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+ uint32_t size;
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+
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+ for (size_t i = 0; i < obs_pw->format_info.num; i++) {
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+ if (obs_pw->format_info.array[i].modifiers.num == 0)
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+ continue;
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+ n_objects += 1;
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+ n_props += 5 + 1;
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+ n_values += 9 + 2 + obs_pw->format_info.array[i].modifiers.num;
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+ n_choices += 2 + 1;
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+ }
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+ for (size_t i = 0; i < obs_pw->format_info.num; i++) {
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+ n_objects += 1;
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+ n_props += 5;
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+ n_values += 9;
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+ n_choices += 2;
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+ }
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+ size = n_objects * spa_pod_object_size + n_props * spa_pod_prop_size +
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+ n_values * spa_pod_value_size + n_choices * spa_pod_choice_size;
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+ blog(LOG_DEBUG, "[pipewire]: calculated spa enumFormat buffer size %u",
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+ size);
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+ return size;
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+}
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+
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static void teardown_pipewire(obs_pipewire *obs_pw)
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{
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if (obs_pw->thread_loop) {
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@@ -408,6 +443,10 @@ static bool build_format_params(obs_pipewire *obs_pw,
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obs_pw->format_info.array[i].spa_format,
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obs_pw->format_info.array[i].modifiers.array,
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obs_pw->format_info.array[i].modifiers.num);
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+ if (!params[params_count - 1]) {
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+ blog(LOG_ERROR, "[pipewire] Failed to format param");
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+ return false;
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+ }
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}
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build_shm:
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@@ -415,6 +454,10 @@ static bool build_format_params(obs_pipewire *obs_pw,
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params[params_count++] = build_format(
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pod_builder, &obs_pw->video_info,
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obs_pw->format_info.array[i].spa_format, NULL, 0);
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+ if (!params[params_count - 1]) {
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+ blog(LOG_ERROR, "[pipewire] Failed to format param");
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+ return false;
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+ }
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}
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*param_list = params;
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*n_params = params_count;
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@@ -521,7 +564,7 @@ static void renegotiate_format(void *data, uint64_t expirations)
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pw_thread_loop_lock(obs_pw->thread_loop);
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- uint8_t params_buffer[2048];
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+ uint8_t params_buffer[calc_spa_enumformat_buffer_size(obs_pw)];
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struct spa_pod_builder pod_builder =
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SPA_POD_BUILDER_INIT(params_buffer, sizeof(params_buffer));
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uint32_t n_params;
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@@ -970,7 +1013,7 @@ void obs_pipewire_connect_stream(obs_pipewire *obs_pw, int pipewire_node,
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struct spa_pod_builder pod_builder;
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const struct spa_pod **params = NULL;
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uint32_t n_params;
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- uint8_t params_buffer[2048];
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+ uint8_t params_buffer[calc_spa_enumformat_buffer_size(obs_pw)];
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pw_thread_loop_lock(obs_pw->thread_loop);
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