FFmpeg：将原始数据编码为FLAC格式并解码回原始数据(附完整源代码)

FFmpeg：将原始数据编码为FLAC格式并解码回原始数据

#include "libavcodec/avcodec.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/samplefmt.h"#define NUMBER_OF_AUDIO_FRAMES 200
#define NAME_BUFF_SIZE 100/* generate i-th frame of test audio */
static int generate_raw_frame(uint16_t *frame_data, int i, int sample_rate,int channels, int frame_size)
{int j, k;for (j = 0; j < frame_size; j++) {frame_data[channels * j] = 10000 * ((j / 10 * i) % 2);for (k = 1; k < channels; k++)frame_data[channels * j + k] = frame_data[channels * j] * (k + 1);}return 0;
}static int init_encoder(const AVCodec *enc, AVCodecContext **enc_ctx,const AVChannelLayout *ch_layout, int sample_rate)
{AVCodecContext *ctx;int result;char name_buff[NAME_BUFF_SIZE];av_channel_layout_describe(ch_layout, name_buff, NAME_BUFF_SIZE);av_log(NULL, AV_LOG_INFO, "channel layout: %s, sample rate: %i\n", name_buff, sample_rate);ctx = avcodec_alloc_context3(enc);if (!ctx) {av_log(NULL, AV_LOG_ERROR, "Can't allocate encoder context\n");return AVERROR(ENOMEM);}ctx->sample_fmt = AV_SAMPLE_FMT_S16;ctx->sample_rate = sample_rate;av_channel_layout_copy(&ctx->ch_layout, ch_layout);result = avcodec_open2(ctx, enc, NULL);if (result < 0) {av_log(ctx, AV_LOG_ERROR, "Can't open encoder\n");return result;}*enc_ctx = ctx;return 0;
}static int init_decoder(const AVCodec *dec, AVCodecContext **dec_ctx,const AVChannelLayout *ch_layout

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