diff options
Diffstat (limited to 'ffmpeg/libavformat/dfa.c')
| -rw-r--r-- | ffmpeg/libavformat/dfa.c | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/ffmpeg/libavformat/dfa.c b/ffmpeg/libavformat/dfa.c deleted file mode 100644 index 9cd13e2..0000000 --- a/ffmpeg/libavformat/dfa.c +++ /dev/null @@ -1,129 +0,0 @@ -/* - * Chronomaster DFA Format Demuxer - * Copyright (c) 2011 Konstantin Shishkov - * - * 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 "libavutil/intreadwrite.h" -#include "avformat.h" -#include "internal.h" - -static int dfa_probe(AVProbeData *p) -{ - if (p->buf_size < 4 || AV_RL32(p->buf) != MKTAG('D', 'F', 'I', 'A')) - return 0; - - if (AV_RL32(p->buf + 16) != 0x80) - return AVPROBE_SCORE_MAX / 4; - - return AVPROBE_SCORE_MAX; -} - -static int dfa_read_header(AVFormatContext *s) -{ - AVIOContext *pb = s->pb; - AVStream *st; - int frames; - int version; - uint32_t mspf; - - if (avio_rl32(pb) != MKTAG('D', 'F', 'I', 'A')) { - av_log(s, AV_LOG_ERROR, "Invalid magic for DFA\n"); - return AVERROR_INVALIDDATA; - } - - version = avio_rl16(pb); - frames = avio_rl16(pb); - - st = avformat_new_stream(s, NULL); - if (!st) - return AVERROR(ENOMEM); - - st->codec->codec_type = AVMEDIA_TYPE_VIDEO; - st->codec->codec_id = AV_CODEC_ID_DFA; - st->codec->width = avio_rl16(pb); - st->codec->height = avio_rl16(pb); - mspf = avio_rl32(pb); - if (!mspf) { - av_log(s, AV_LOG_WARNING, "Zero FPS reported, defaulting to 10\n"); - mspf = 100; - } - avpriv_set_pts_info(st, 24, mspf, 1000); - avio_skip(pb, 128 - 16); // padding - st->duration = frames; - - if (ff_alloc_extradata(st->codec, 2)) - return AVERROR(ENOMEM); - AV_WL16(st->codec->extradata, version); - if (version == 0x100) - st->sample_aspect_ratio = (AVRational){2, 1}; - - return 0; -} - -static int dfa_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - AVIOContext *pb = s->pb; - uint32_t frame_size; - int ret, first = 1; - - if (pb->eof_reached) - return AVERROR_EOF; - - if (av_get_packet(pb, pkt, 12) != 12) - return AVERROR(EIO); - while (!pb->eof_reached) { - if (!first) { - ret = av_append_packet(pb, pkt, 12); - if (ret < 0) { - av_free_packet(pkt); - return ret; - } - } else - first = 0; - frame_size = AV_RL32(pkt->data + pkt->size - 8); - if (frame_size > INT_MAX - 4) { - av_log(s, AV_LOG_ERROR, "Too large chunk size: %d\n", frame_size); - return AVERROR(EIO); - } - if (AV_RL32(pkt->data + pkt->size - 12) == MKTAG('E', 'O', 'F', 'R')) { - if (frame_size) { - av_log(s, AV_LOG_WARNING, "skipping %d bytes of end-of-frame marker chunk\n", - frame_size); - avio_skip(pb, frame_size); - } - return 0; - } - ret = av_append_packet(pb, pkt, frame_size); - if (ret < 0) { - av_free_packet(pkt); - return ret; - } - } - - return 0; -} - -AVInputFormat ff_dfa_demuxer = { - .name = "dfa", - .long_name = NULL_IF_CONFIG_SMALL("Chronomaster DFA"), - .read_probe = dfa_probe, - .read_header = dfa_read_header, - .read_packet = dfa_read_packet, - .flags = AVFMT_GENERIC_INDEX, -}; |