内存泄漏的问题之av_bitstream_filter_filter

本文介绍使用FFmpeg进行音视频编解码的过程,包括如何利用av_bitstream_filter_filter函数进行比特流过滤,以及如何使用av_interleaved_write_frame进行帧写入。通过具体的代码示例展示了从原始数据包到过滤后的数据包处理流程。

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AVPacket new_pkt = pkt;
int a = av_bitstream_filter_filter(m_bsfDecoderContext, out_stream->codec,
	NULL,
	&new_pkt.data,
				&new_pkt.size,
				pkt.data,
				pkt.size,
				pkt.flags & AV_PKT_FLAG_KEY);
 
			av_free_packet(&pkt);
			pkt.data = new_pkt.data;
			pkt.size = new_pkt.size;
 
			if (av_interleaved_write_frame(ofmt_ctx, &pkt) < 0)break;
			av_free(new_pkt.data);
int decode_libpics(DEC_CDSC * cdsc, LibVCData* libvc_data)//解码特定的比特流 { STATES state_lib = STATE_DECODING; unsigned char * bs_buf_lib = NULL; unsigned char * bs_buf_lib2 = NULL; DEC id_lib = NULL; COM_BITB bitb_lib; COM_IMGB * imgb_lib; DEC_STAT stat_lib; int ret; COM_CLK clk_beg_lib, clk_tot_lib; int bs_cnt_lib, pic_cnt_lib; int bs_size_lib, bs_read_pos_lib = 0; int width_lib, height_lib; FILE * fp_bs_lib = NULL; #if LINUX signal(SIGSEGV, handler); // install our handler #endif #if DECODING_TIME_TEST clk_beg_lib = com_clk_get(); #endif /* open input bitstream */ fp_bs_lib = fopen(op_fname_inp_libpics, "rb"); if (fp_bs_lib == NULL) { v0print("ERROR: cannot open libpics bitstream file = %s\n", op_fname_inp_libpics); print_usage(); return -1; } if (op_flag[OP_FLAG_FNAME_OUT_LIBPICS]) { /* remove decoded file contents if exists */ FILE * fp; fp = fopen(op_fname_out_libpics, "wb"); if (fp == NULL) { v0print("ERROR: cannot create a decoded libpics file\n"); print_usage(); return -1; } fclose(fp); } bs_buf_lib = malloc(MAX_BS_BUF); if (bs_buf_lib == NULL) { v0print("ERROR: cannot allocate bit buffer, size=%d\n", MAX_BS_BUF); return -1; } bs_buf_lib2 = malloc(MAX_BS_BUF); if (bs_buf_lib2 == NULL) { v0print("ERROR: cannot allocate bit buffer, size2=%d\n", MAX_BS_BUF); return -1; } #if CU_LEVEL_PRIVACY unsigned char *bs_buf_lib3 = malloc(MAX_BS_BUF); if (bs_buf_lib3 == NULL) { v0print("ERROR: cannot allocate bit buffer, size2=%d\n", MAX_BS_BUF); return -1; } #endif #if SVAC_UD_MD5_STREAM unsigned char * bs_buf4 = NULL; unsigned char * bs_buf5 = NULL; bs_buf5 = malloc(MAX_BS_BUF); if (bs_buf5 == NULL) { v0print("ERROR: cannot allocate bit buffer, size=%d\n", MAX_BS_BUF); return -1; } bitb_lib.addr3 = bs_buf5; bitb_lib.addr3_beg = bs_buf5; bs_buf4 = malloc(MAX_BS_BUF); if (bs_buf4 == NULL) { v0print("ERROR: cannot allocate bit buffer, size=%d\n", MAX_BS_BUF); return -1; } unsigned char * buf4_p = bs_buf4; unsigned char * buf4_beg = bs_buf4; #endif id_lib = dec_create(cdsc, NULL); if (id_lib == NULL) { v0print("ERROR: cannot create decoder\n"); return -1; } set_livcdata_dec(id_lib, libvc_data); if (set_extra_config(id_lib)) { v0print("ERROR: cannot set extra configurations\n"); return -1; } pic_cnt_lib = 0; clk_tot_lib = 0; bs_cnt_lib = 0; width_lib = height_lib = 0; #if CU_LEVEL_PRIVACY int bs_buf3_size = 0; #endif while (1) { if (state_lib == STATE_DECODING) { bs_size_lib = read_a_bs(fp_bs_lib, &bs_read_pos_lib, bs_buf_lib, bs_buf_lib2 #if CU_LEVEL_PRIVACY , bs_buf_lib3, &bs_buf3_size #endif #if SVAC_UD_MD5_STREAM , &bitb_lib #endif ); if (bs_size_lib <= 0) { state_lib = STATE_BUMPING; v1print("bumping process starting...\n"); continue; } bs_read_pos_lib += (bs_size_lib); bitb_lib.addr = bs_buf_lib; bitb_lib.ssize = bs_size_lib; bitb_lib.bsize = MAX_BS_BUF; #if CU_LEVEL_PRIVACY bitb_lib.addr2 = bs_buf_lib3; bitb_lib.ssize2 = bs_buf3_size; #endif #if !DECODING_TIME_TEST clk_beg_lib = com_clk_get(); #endif /* main decoding block */ ret = dec_cnk((DEC_CTX *)id_lib, &bitb_lib, &stat_lib); if (COM_FAILED(ret)) { v0print("failed to decode bitstream\n"); return -1; } #if !DECODING_TIME_TEST clk_tot_lib += com_clk_from(clk_beg_lib); #endif } if (stat_lib.fnum >= 0 || state_lib == STATE_BUMPING) { ret = dec_pull_frm((DEC_CTX *)id_lib, &imgb_lib, state_lib); if (ret == COM_ERR_UNEXPECTED) { v1print("bumping process completed\n"); goto END; } else if (COM_FAILED(ret)) { v0print("failed to pull the decoded image\n"); return -1; } } else { imgb_lib = NULL; } if (imgb_lib) { width_lib = imgb_lib->width[0]; height_lib = imgb_lib->height[0]; if (op_flag[OP_FLAG_FNAME_OUT_LIBPICS]) { write_dec_img(id_lib, op_fname_out_libpics, imgb_lib, ((DEC_CTX *)id_lib)->info.bit_depth_internal); } imgb_lib->release(imgb_lib); pic_cnt_lib++; } } END: #if DECODING_TIME_TEST clk_tot_lib += com_clk_from(clk_beg_lib); #endif libvc_data->num_lib_pic = pic_cnt_lib; #if CU_LEVEL_PRIVACY if (bs_buf_lib3) { free(bs_buf_lib3); bs_buf_lib3 = NULL; } #endif if (id_lib) dec_delete(id_lib); if (fp_bs_lib) fclose(fp_bs_lib); if (bs_buf_lib) free(bs_buf_lib); return 0; } #endif
最新发布
07-16
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