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Allow resizing shared memory buffers

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Robbert van der Helm
2021-06-10 14:13:18 +02:00
parent 23d99411c8
commit 0370c64f99
2 changed files with 38 additions and 4 deletions
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src/common/audio-shm.h
+15 -4
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@@ -121,11 +121,21 @@ class AudioShmBuffer {
AudioShmBuffer& operator=(const AudioShmBuffer&) = delete;
AudioShmBuffer(AudioShmBuffer&&) noexcept;
AudioShmBuffer& operator=(AudioShmBuffer&&) = delete;
AudioShmBuffer& operator=(AudioShmBuffer&&) noexcept;
/**
* Adapt to a new buffer size or channel layout. The name of the buffer
* needs to remain the same.
*
* @throw `std::invalid_argument` If the config is for a buffer with a
* different name.
*/
void resize(const Config& new_config);
/**
* Get a pointer to the part of the buffer where this input audio channel is
* stored in. Both the bus and the channel indices start at zero.
* stored in. Both the bus and the channel indices start at zero. These
* addresses might change after a call to `resize()`.
*/
template <typename T>
T* input_channel_ptr(const uint32_t bus, const uint32_t channel) {
@@ -135,7 +145,8 @@ class AudioShmBuffer {
/**
* Get a pointer to the part of the buffer where this output audio channel
* is stored in. Both the bus and the channel indices start at zero.
* is stored in. Both the bus and the channel indices start at zero. These
* addresses might change after a call to `resize()`.
*/
template <typename T>
T* output_channel_ptr(const uint32_t bus, const uint32_t channel) {
@@ -143,7 +154,7 @@ class AudioShmBuffer {
config.output_offsets[bus][channel];
}
const Config config;
Config config;
private:
boost::interprocess::shared_memory_object shm;