瑞芯微 多路视频硬解码 代码

瑞芯微多路视频硬解码通常需要使用相关的SDK和驱动程序来实现。下面提供一个简单的代码示例，演示如何使用RK3399处理器进行H.264视频硬解码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "rockchip/rk_mpi.h"
#include "rockchip/rk_type.h"

#define IN_FILE "/path/to/input.h264"
#define OUT_FILE "/path/to/output.yuv"
#define WIDTH 1920
#define HEIGHT 1080

int main(int argc, char **argv) {
  MPP_RET ret;
  MPP_CTX mpp_ctx = NULL;
  MppApi *mpi = NULL;
  FILE *in_file = NULL, *out_file = NULL;
  RK_U8 *buf = NULL;
  MppBuffer pkt_buf = NULL;
  MppBuffer frm_buf = NULL;
  MppPacket pkt = NULL;
  MppFrame frm = NULL;
  RK_U32 pkt_eos = 0, frm_eos = 0;
  RK_U32 pkt_size = 0, frm_size = 0;
  RK_U32 width = WIDTH, height = HEIGHT;
  RK_U32 hor_stride = 0, ver_stride = 0;
  
  // 初始化MPP上下文
  ret = mpp_create(&mpp_ctx, &mpi);
  if (ret != MPP_OK) {
    printf("mpp_create failed: %d\n", ret);
    return -1;
  }

  // 配置解码参数
  MppCodingType type = MPP_VIDEO_CodingAVC;
  MppFrameFormat fmt = MPP_FMT_YUV420SP;
  MppPacketCoding pkt_type = MPP_VIDEO_CodingAVC;
  MppFrameCoding frm_type = MPP_VIDEO_CodingI420;
  MppEncConfig enc_conf;
  memset(&enc_conf, 0, sizeof(enc_conf));
  enc_conf.coding = type;
  enc_conf.width = width;
  enc_conf.height = height;
  enc_conf.hor_stride = hor_stride;
  enc_conf.ver_stride = ver_stride;
  enc_conf.fps_in = 30;
  enc_conf.fps_out = 30;
  enc_conf.qp_init = 0;
  enc_conf.qp_max = 51;
  enc_conf.qp_min = 0;
  enc_conf.rc_mode = MPP_ENC_RC_MODE_CBR;
  enc_conf.bps_target = 1024 * 1024;
  enc_conf.profile = MPP_PROFILE_AVC_HIGH;
  enc_conf.level = MPP_LEVEL_UNKNOWN;
  enc_conf.gop = 30;
  enc_conf.skip_cnt = 0;
  enc_conf.max_key_interval = 30;
  enc_conf.ref_num = 1;
  enc_conf.i_frame_qp_delta = 0;
  enc_conf.b_frame_qp_delta = 0;
  enc_conf.init_vbv_buffer_size = 1024 * 1024;
  enc_conf.vbv_buffer_size = 1024 * 1024;
  enc_conf.vbv_buffer_delay = 1000;

  // 初始化解码器
  ret = mpi->control(mpp_ctx, MPP_DEC_SET_OUTPUT_FORMAT, &fmt);
  if (ret != MPP_OK) {
    printf("mpi->control MPP_DEC_SET_OUTPUT_FORMAT failed: %d\n", ret);
    goto end;
  }

  ret = mpi->control(mpp_ctx, MPP_DEC_SET_CodingType, &type);
  if (ret != MPP_OK) {
    printf("mpi->control MPP_DEC_SET_CodingType failed: %d\n", ret);
    goto end;
  }

  ret = mpi->control(mpp_ctx, MPP_DEC_SET_FRAME_INFO, &enc_conf);
  if (ret != MPP_OK) {
    printf("mpi->control MPP_DEC_SET_FRAME_INFO failed: %d\n", ret);
    goto end;
  }

  // 打开输入文件和输出文件
  in_file = fopen(IN_FILE, "rb");
  out_file = fopen(OUT_FILE, "wb");
  if (!in_file || !out_file) {
    printf("open file failed\n");
    goto end;
  }

  // 解码循环
  while (!pkt_eos || !frm_eos) {
    if (!pkt_eos) {
      // 读取输入数据
      if (!pkt_buf) {
        ret = mpi->control(mpp_ctx, MPP_DEC_GET_PKT_BUF, &pkt_buf);
        if (ret != MPP_OK) {
          printf("mpi->control MPP_DEC_GET_PKT_BUF failed: %d\n", ret);
          goto end;
        }
      }

      buf = (RK_U8*)mpp_buffer_get_ptr(pkt_buf);
      pkt_size = fread(buf, 1, mpp_buffer_get_size(pkt_buf), in_file);
      if (pkt_size == 0) {
        pkt_eos = 1;
      }

      // 构造输入数据包
      ret = mpp_packet_init(&pkt, buf, pkt_size);
      if (ret != MPP_OK) {
        printf("mpp_packet_init failed: %d\n", ret);
        goto end;
      }

      mpp_packet_set_length(pkt, pkt_size);
      mpp_packet_set_pts(pkt, 0);
      mpp_packet_set_dts(pkt, 0);
    }

    if (!frm_eos) {
      if (!frm_buf) {
        // 申请输出缓冲区
        ret = mpi->control(mpp_ctx, MPP_DEC_GET_FRAME_BUF, &frm_buf);
        if (ret != MPP_OK) {
          printf("mpi->control MPP_DEC_GET_FRAME_BUF failed: %d\n", ret);
          goto end;
        }
      }

      // 解码数据包
      ret = mpi->decode_put_packet(mpp_ctx, pkt);
      if (ret != MPP_OK) {
        printf("mpi->decode_put_packet failed: %d\n", ret);
        goto end;
      }

      ret = mpi->decode_get_frame(mpp_ctx, &frm);
      if (ret != MPP_OK) {
        if (ret == MPP_NOK_ENOMEM) {
          // 缓冲区不足，继续循环
          usleep(1000);
          continue;
        } else if (ret == MPP_OK || ret == MPP_ERR_TIMEOUT) {
          // 解码成功或者超时，继续循环
          usleep(1000);
          continue;
        } else {
          printf("mpi->decode_get_frame failed: %d\n", ret);
          goto end;
        }
      }

      // 将解码后的数据写入输出文件
      buf = (RK_U8*)mpp_buffer_get_ptr(frm_buf);
      frm_size = mpp_frame_get_size(frm);
      fwrite(buf, 1, frm_size, out_file);
    }
  }

end:
  // 释放资源
  if (mpi) {
    mpi->reset(mpp_ctx);
    mpp_destroy(mpp_ctx);
  }

  if (in_file) {
    fclose(in_file);
  }

  if (out_file) {
    fclose(out_file);
  }

  if (pkt_buf) {
    mpp_buffer_put(pkt_buf);
  }

  if (pkt) {
    mpp_packet_deinit(&pkt);
  }

  if (frm_buf) {
    mpp_buffer_put(frm_buf);
  }

  if (frm) {
    mpp_frame_deinit(&frm);
  }

  return 0;
}

需要注意的是，这只是一个简单的示例代码，实际使用时需要根据具体的需求和硬件平台进行相应的修改和优化。