yading@11: /*
yading@11:  * MD5 encoder (for codec/format testing)
yading@11:  * Copyright (c) 2009 Reimar Döffinger, based on crcenc (c) 2002 Fabrice Bellard
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "libavutil/md5.h"
yading@11: #include "avformat.h"
yading@11: #include "internal.h"
yading@11: 
yading@11: struct MD5Context {
yading@11:     struct AVMD5 *md5;
yading@11: };
yading@11: 
yading@11: static void md5_finish(struct AVFormatContext *s, char *buf)
yading@11: {
yading@11:     struct MD5Context *c = s->priv_data;
yading@11:     uint8_t md5[16];
yading@11:     int i, offset = strlen(buf);
yading@11:     av_md5_final(c->md5, md5);
yading@11:     for (i = 0; i < sizeof(md5); i++) {
yading@11:         snprintf(buf + offset, 3, "%02"PRIx8, md5[i]);
yading@11:         offset += 2;
yading@11:     }
yading@11:     buf[offset] = '\n';
yading@11:     buf[offset+1] = 0;
yading@11: 
yading@11:     avio_write(s->pb, buf, strlen(buf));
yading@11:     avio_flush(s->pb);
yading@11: }
yading@11: 
yading@11: #if CONFIG_MD5_MUXER
yading@11: static int write_header(struct AVFormatContext *s)
yading@11: {
yading@11:     struct MD5Context *c = s->priv_data;
yading@11:     c->md5 = av_md5_alloc();
yading@11:     if (!c->md5)
yading@11:         return AVERROR(ENOMEM);
yading@11:     av_md5_init(c->md5);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int write_packet(struct AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     struct MD5Context *c = s->priv_data;
yading@11:     av_md5_update(c->md5, pkt->data, pkt->size);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int write_trailer(struct AVFormatContext *s)
yading@11: {
yading@11:     struct MD5Context *c = s->priv_data;
yading@11:     char buf[64] = "MD5=";
yading@11: 
yading@11:     md5_finish(s, buf);
yading@11: 
yading@11:     av_freep(&c->md5);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: AVOutputFormat ff_md5_muxer = {
yading@11:     .name              = "md5",
yading@11:     .long_name         = NULL_IF_CONFIG_SMALL("MD5 testing"),
yading@11:     .priv_data_size    = sizeof(struct MD5Context),
yading@11:     .audio_codec       = AV_CODEC_ID_PCM_S16LE,
yading@11:     .video_codec       = AV_CODEC_ID_RAWVIDEO,
yading@11:     .write_header      = write_header,
yading@11:     .write_packet      = write_packet,
yading@11:     .write_trailer     = write_trailer,
yading@11:     .flags             = AVFMT_NOTIMESTAMPS,
yading@11: };
yading@11: #endif
yading@11: 
yading@11: #if CONFIG_FRAMEMD5_MUXER
yading@11: static int framemd5_write_header(struct AVFormatContext *s)
yading@11: {
yading@11:     struct MD5Context *c = s->priv_data;
yading@11:     c->md5 = av_md5_alloc();
yading@11:     if (!c->md5)
yading@11:         return AVERROR(ENOMEM);
yading@11:     return ff_framehash_write_header(s);
yading@11: }
yading@11: 
yading@11: static int framemd5_write_packet(struct AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     struct MD5Context *c = s->priv_data;
yading@11:     char buf[256];
yading@11:     av_md5_init(c->md5);
yading@11:     av_md5_update(c->md5, pkt->data, pkt->size);
yading@11: 
yading@11:     snprintf(buf, sizeof(buf) - 64, "%d, %10"PRId64", %10"PRId64", %8d, %8d, ",
yading@11:              pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size);
yading@11:     md5_finish(s, buf);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int framemd5_write_trailer(struct AVFormatContext *s)
yading@11: {
yading@11:     struct MD5Context *c = s->priv_data;
yading@11:     av_freep(&c->md5);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: AVOutputFormat ff_framemd5_muxer = {
yading@11:     .name              = "framemd5",
yading@11:     .long_name         = NULL_IF_CONFIG_SMALL("Per-frame MD5 testing"),
yading@11:     .priv_data_size    = sizeof(struct MD5Context),
yading@11:     .audio_codec       = AV_CODEC_ID_PCM_S16LE,
yading@11:     .video_codec       = AV_CODEC_ID_RAWVIDEO,
yading@11:     .write_header      = framemd5_write_header,
yading@11:     .write_packet      = framemd5_write_packet,
yading@11:     .write_trailer     = framemd5_write_trailer,
yading@11:     .flags             = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT,
yading@11: };
yading@11: #endif