It looks like you've posted some incomplete C++ code for a video player class that includes an audio callback function. I'll help you complete the `videoplayer` class and fix any issues in your provided code snippet. Here's a completed version of your `videoplayer` class, including the `audiocallback` function: ```cpp #include <cstdint> // For uint8_t #include <cstring> // For memset #include "log.h" // Assuming this is your logging header #include "sdl.h" // Assuming SDL headers // Static buffer variables static int audio_len = 0; static uint8_t* audio_pos = nullptr; void videoplayer::audiocallback(void* userdata, uint8_t* stream, int len) { std::memset(stream, 0, len); // Use std::memset instead of sdl_memset if (audio_len <= 0) return; len = (len > audio_len) ? audio_len : len; // Mix as much data as possible SDL_MixAudio(stream, audio_pos, len, SDL_MIX_MAXVOLUME); // Use SDL_MixAudio audio_pos += len; audio_len -= len; } // Assuming the rest of the videoplayer class definition class videoplayer { public: videoplayer() { // Constructor } ~videoplayer() { // Destructor } void play_audio(const uint8_t* audio_data, int length) { audio_pos = const_cast<uint8_t*>(audio_data); audio_len = length; } // Other member functions... }; // Example usage int main() { videoplayer vp; uint8_t audio_data[1024]; // Example audio data vp.play_audio(audio_data, sizeof(audio_data)); // More code here... return 0; } ``` Key Changes: 1. Headers: Added `<cstdint>` for `uint8_t`, `<cstring>` for `std::memset`, and assumed inclusion of SDL headers. 2. Memory Set Function: Replaced `sdl_memset` with `std::memset`. 3. Mixing Audio: Used `SDL_MixAudio` instead of `sdl_mixaudio` assuming you meant to use the SDL function. 4. Class Definition: Provided a basic `videoplayer` class structure with a constructor, destructor, and an example `play_audio` method. 5. Static Variables: Initialized `audio_pos` to `nullptr`. This should give you a more complete and functional class. If you need further assistance or have specific requirements, feel free to ask! [2024-08-08 15:59:25 | AI写代码神器 | 549点数解答]