faac PCM转ACC C代码实现

要实现将PCM转换为AAC的C代码，可以使用FAAC库。首先，需要使用FAAC库的API接口来进行编码。以下是一个简单的示例代码：

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <faac.h>

#define INPUT_FILE "input.pcm"
#define OUTPUT_FILE "output.aac"

int main() {
    FILE *inputFile = fopen(INPUT_FILE, "rb");
    if (!inputFile) {
        printf("Failed to open input file\n");
        return -1;
    }

    FILE *outputFile = fopen(OUTPUT_FILE, "wb");
    if (!outputFile) {
        printf("Failed to open output file\n");
        fclose(inputFile);
        return -1;
    }

    // 设置编码参数
    faacEncConfigurationPtr config = faacEncGetCurrentConfiguration();
    config->mpegVersion = MPEG4;
    config->aacObjectType = LOW;
    config->inputFormat = FAAC_INPUT_16BIT;
    config->outputFormat = 0; // 0表示输出原始AAC数据
    faacEncSetConfiguration(config);

    // 创建编码器句柄
    faacEncHandle encoder = faacEncOpen(44100, 2, &inputSamples, &maxOutputBytes);
    if (!encoder) {
        printf("Failed to open FAAC encoder\n");
        fclose(inputFile);
        fclose(outputFile);
        return -1;
    }

    // 读取PCM数据并进行编码
    int inputBufferSize = 4096;
    int16_t *inputBuffer = (int16_t *)malloc(inputBufferSize);
    unsigned char *outputBuffer = (unsigned char *)malloc(maxOutputBytes);
    while (1) {
        int bytesRead = fread(inputBuffer, sizeof(int16_t), inputBufferSize / sizeof(int16_t), inputFile);
        if (bytesRead <= 0) {
            break;
        }

        int outputBytes = faacEncEncode(encoder, inputBuffer, bytesRead, outputBuffer, maxOutputBytes);
        fwrite(outputBuffer, 1, outputBytes, outputFile);
    }

    // 清理资源
    free(inputBuffer);
    free(outputBuffer);
    faacEncClose(encoder);
    fclose(inputFile);
    fclose(outputFile);

    return 0;
}

上述代码使用了FAAC库的API接口来进行PCM到AAC的编码。首先，需要设置编码参数，然后创建编码器句柄。接下来，循环读取PCM数据并进行编码，将编码后的数据写入输出文件。最后，清理资源并关闭编码器和文件。

请注意，上述代码仅为示例，实际使用时需要根据具体情况进行适当修改和错误处理。另外，还需要确保已正确安装和配置FAAC库。
#### 引用[.reference_title]
- *1* [使用FAAC转换PCM为AAC](https://blog.csdn.net/u014161864/article/details/43152967)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* *3* [使用FAAC转码ACC](https://blog.csdn.net/weixin_41836671/article/details/126442307)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
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