| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * CRC encoder (for codec/format testing) | ||
| 3 | * Copyright (c) 2002 Fabrice Bellard | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #include <inttypes.h> | ||
| 23 | |||
| 24 | #include "libavutil/adler32.h" | ||
| 25 | #include "avformat.h" | ||
| 26 | #include "mux.h" | ||
| 27 | |||
| 28 | typedef struct CRCState { | ||
| 29 | uint32_t crcval; | ||
| 30 | } CRCState; | ||
| 31 | |||
| 32 | 186 | static int crc_init(struct AVFormatContext *s) | |
| 33 | { | ||
| 34 | 186 | CRCState *crc = s->priv_data; | |
| 35 | |||
| 36 | /* init CRC */ | ||
| 37 | 186 | crc->crcval = 1; | |
| 38 | |||
| 39 | 186 | return 0; | |
| 40 | } | ||
| 41 | |||
| 42 | 13981 | static int crc_write_packet(struct AVFormatContext *s, AVPacket *pkt) | |
| 43 | { | ||
| 44 | 13981 | CRCState *crc = s->priv_data; | |
| 45 | 13981 | crc->crcval = av_adler32_update(crc->crcval, pkt->data, pkt->size); | |
| 46 | 13981 | return 0; | |
| 47 | } | ||
| 48 | |||
| 49 | 186 | static int crc_write_trailer(struct AVFormatContext *s) | |
| 50 | { | ||
| 51 | 186 | CRCState *crc = s->priv_data; | |
| 52 | |||
| 53 | 186 | avio_printf(s->pb, "CRC=0x%08"PRIx32"\n", crc->crcval); | |
| 54 | |||
| 55 | 186 | return 0; | |
| 56 | } | ||
| 57 | |||
| 58 | const FFOutputFormat ff_crc_muxer = { | ||
| 59 | .p.name = "crc", | ||
| 60 | .p.long_name = NULL_IF_CONFIG_SMALL("CRC testing"), | ||
| 61 | .priv_data_size = sizeof(CRCState), | ||
| 62 | .p.audio_codec = AV_CODEC_ID_PCM_S16LE, | ||
| 63 | .p.video_codec = AV_CODEC_ID_RAWVIDEO, | ||
| 64 | .init = crc_init, | ||
| 65 | .write_packet = crc_write_packet, | ||
| 66 | .write_trailer = crc_write_trailer, | ||
| 67 | .p.flags = AVFMT_NOTIMESTAMPS, | ||
| 68 | }; | ||
| 69 |