| /* |
| * frame CRC encoder (for codec/format testing) |
| * Copyright (c) 2002 Fabrice Bellard |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <inttypes.h> |
| |
| #include "libavutil/adler32.h" |
| #include "libavutil/avstring.h" |
| #include "avformat.h" |
| #include "internal.h" |
| |
| static int framecrc_write_header(struct AVFormatContext *s) |
| { |
| int i; |
| for (i = 0; i < s->nb_streams; i++) { |
| AVStream *st = s->streams[i]; |
| AVCodecParameters *par = st->codecpar; |
| if (par->extradata) { |
| uint32_t crc = av_adler32_update(0, par->extradata, par->extradata_size); |
| avio_printf(s->pb, "#extradata %d: %8d, 0x%08"PRIx32"\n", |
| i, par->extradata_size, crc); |
| } |
| } |
| |
| return ff_framehash_write_header(s); |
| } |
| |
| static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt) |
| { |
| uint32_t crc = av_adler32_update(0, pkt->data, pkt->size); |
| char buf[256]; |
| |
| snprintf(buf, sizeof(buf), "%d, %10"PRId64", %10"PRId64", %8"PRId64", %8d, 0x%08"PRIx32, |
| pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size, crc); |
| if (pkt->flags != AV_PKT_FLAG_KEY) |
| av_strlcatf(buf, sizeof(buf), ", F=0x%0X", pkt->flags); |
| if (pkt->side_data_elems) { |
| int i, j; |
| av_strlcatf(buf, sizeof(buf), ", S=%d", pkt->side_data_elems); |
| |
| for (i=0; i<pkt->side_data_elems; i++) { |
| uint32_t side_data_crc = 0; |
| if (HAVE_BIGENDIAN && AV_PKT_DATA_PALETTE == pkt->side_data[i].type) { |
| for (j=0; j<pkt->side_data[i].size; j++) { |
| side_data_crc = av_adler32_update(side_data_crc, |
| pkt->side_data[i].data + (j^3), |
| 1); |
| } |
| } else { |
| side_data_crc = av_adler32_update(0, |
| pkt->side_data[i].data, |
| pkt->side_data[i].size); |
| } |
| av_strlcatf(buf, sizeof(buf), ", %8d, 0x%08x", pkt->side_data[i].size, side_data_crc); |
| } |
| } |
| av_strlcatf(buf, sizeof(buf), "\n"); |
| avio_write(s->pb, buf, strlen(buf)); |
| return 0; |
| } |
| |
| AVOutputFormat ff_framecrc_muxer = { |
| .name = "framecrc", |
| .long_name = NULL_IF_CONFIG_SMALL("framecrc testing"), |
| .audio_codec = AV_CODEC_ID_PCM_S16LE, |
| .video_codec = AV_CODEC_ID_RAWVIDEO, |
| .write_header = framecrc_write_header, |
| .write_packet = framecrc_write_packet, |
| .flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT | |
| AVFMT_TS_NEGATIVE, |
| }; |