yading@11: /* yading@11: * SMJPEG muxer yading@11: * Copyright (c) 2012 Paul B Mahol 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: /** yading@11: * @file yading@11: * This is a muxer for Loki SDL Motion JPEG files yading@11: */ yading@11: yading@11: #include "avformat.h" yading@11: #include "internal.h" yading@11: #include "smjpeg.h" yading@11: yading@11: typedef struct SMJPEGMuxContext { yading@11: uint32_t duration; yading@11: } SMJPEGMuxContext; yading@11: yading@11: static int smjpeg_write_header(AVFormatContext *s) yading@11: { yading@11: AVDictionaryEntry *t = NULL; yading@11: AVIOContext *pb = s->pb; yading@11: int n, tag; yading@11: yading@11: if (s->nb_streams > 2) { yading@11: av_log(s, AV_LOG_ERROR, "more than >2 streams are not supported\n"); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: avio_write(pb, SMJPEG_MAGIC, 8); yading@11: avio_wb32(pb, 0); yading@11: avio_wb32(pb, 0); yading@11: yading@11: while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) { yading@11: avio_wl32(pb, SMJPEG_TXT); yading@11: avio_wb32(pb, strlen(t->key) + strlen(t->value) + 3); yading@11: avio_write(pb, t->key, strlen(t->key)); yading@11: avio_write(pb, " = ", 3); yading@11: avio_write(pb, t->value, strlen(t->value)); yading@11: } yading@11: yading@11: for (n = 0; n < s->nb_streams; n++) { yading@11: AVStream *st = s->streams[n]; yading@11: AVCodecContext *codec = st->codec; yading@11: if (codec->codec_type == AVMEDIA_TYPE_AUDIO) { yading@11: tag = ff_codec_get_tag(ff_codec_smjpeg_audio_tags, codec->codec_id); yading@11: if (!tag) { yading@11: av_log(s, AV_LOG_ERROR, "unsupported audio codec\n"); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: avio_wl32(pb, SMJPEG_SND); yading@11: avio_wb32(pb, 8); yading@11: avio_wb16(pb, codec->sample_rate); yading@11: avio_w8(pb, codec->bits_per_coded_sample); yading@11: avio_w8(pb, codec->channels); yading@11: avio_wl32(pb, tag); yading@11: avpriv_set_pts_info(st, 32, 1, 1000); yading@11: } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) { yading@11: tag = ff_codec_get_tag(ff_codec_smjpeg_video_tags, codec->codec_id); yading@11: if (!tag) { yading@11: av_log(s, AV_LOG_ERROR, "unsupported video codec\n"); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: avio_wl32(pb, SMJPEG_VID); yading@11: avio_wb32(pb, 12); yading@11: avio_wb32(pb, 0); yading@11: avio_wb16(pb, codec->width); yading@11: avio_wb16(pb, codec->height); yading@11: avio_wl32(pb, tag); yading@11: avpriv_set_pts_info(st, 32, 1, 1000); yading@11: } yading@11: } yading@11: yading@11: avio_wl32(pb, SMJPEG_HEND); yading@11: avio_flush(pb); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int smjpeg_write_packet(AVFormatContext *s, AVPacket *pkt) yading@11: { yading@11: SMJPEGMuxContext *smc = s->priv_data; yading@11: AVIOContext *pb = s->pb; yading@11: AVStream *st = s->streams[pkt->stream_index]; yading@11: AVCodecContext *codec = st->codec; yading@11: yading@11: if (codec->codec_type == AVMEDIA_TYPE_AUDIO) yading@11: avio_wl32(pb, SMJPEG_SNDD); yading@11: else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) yading@11: avio_wl32(pb, SMJPEG_VIDD); yading@11: else yading@11: return 0; yading@11: yading@11: avio_wb32(pb, pkt->pts); yading@11: avio_wb32(pb, pkt->size); yading@11: avio_write(pb, pkt->data, pkt->size); yading@11: yading@11: smc->duration = FFMAX(smc->duration, pkt->pts + pkt->duration); yading@11: return 0; yading@11: } yading@11: yading@11: static int smjpeg_write_trailer(AVFormatContext *s) yading@11: { yading@11: SMJPEGMuxContext *smc = s->priv_data; yading@11: AVIOContext *pb = s->pb; yading@11: int64_t currentpos; yading@11: yading@11: if (pb->seekable) { yading@11: currentpos = avio_tell(pb); yading@11: avio_seek(pb, 12, SEEK_SET); yading@11: avio_wb32(pb, smc->duration); yading@11: avio_seek(pb, currentpos, SEEK_SET); yading@11: } yading@11: yading@11: avio_wl32(pb, SMJPEG_DONE); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: AVOutputFormat ff_smjpeg_muxer = { yading@11: .name = "smjpeg", yading@11: .long_name = NULL_IF_CONFIG_SMALL("Loki SDL MJPEG"), yading@11: .priv_data_size = sizeof(SMJPEGMuxContext), yading@11: .audio_codec = AV_CODEC_ID_PCM_S16LE, yading@11: .video_codec = AV_CODEC_ID_MJPEG, yading@11: .write_header = smjpeg_write_header, yading@11: .write_packet = smjpeg_write_packet, yading@11: .write_trailer = smjpeg_write_trailer, yading@11: .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT, yading@11: .codec_tag = (const AVCodecTag *const []){ ff_codec_smjpeg_video_tags, ff_codec_smjpeg_audio_tags, 0 }, yading@11: };