diff options
Diffstat (limited to 'ffmpeg1/libavformat/ffmetadec.c')
| -rw-r--r-- | ffmpeg1/libavformat/ffmetadec.c | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/ffmpeg1/libavformat/ffmetadec.c b/ffmpeg1/libavformat/ffmetadec.c deleted file mode 100644 index 4bdc98a..0000000 --- a/ffmpeg1/libavformat/ffmetadec.c +++ /dev/null @@ -1,175 +0,0 @@ -/* - * Metadata demuxer - * Copyright (c) 2010 Anton Khirnov - * - * 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/mathematics.h" -#include "avformat.h" -#include "ffmeta.h" -#include "internal.h" -#include "libavutil/dict.h" - -static int probe(AVProbeData *p) -{ - if(!memcmp(p->buf, ID_STRING, strlen(ID_STRING))) - return AVPROBE_SCORE_MAX; - return 0; -} - -static void get_line(AVIOContext *s, uint8_t *buf, int size) -{ - do { - uint8_t c; - int i = 0; - - while ((c = avio_r8(s))) { - if (c == '\\') { - if (i < size - 1) - buf[i++] = c; - c = avio_r8(s); - } else if (c == '\n') - break; - - if (i < size - 1) - buf[i++] = c; - } - buf[i] = 0; - } while (!url_feof(s) && (buf[0] == ';' || buf[0] == '#' || buf[0] == 0)); -} - -static AVChapter *read_chapter(AVFormatContext *s) -{ - uint8_t line[256]; - int64_t start, end; - AVRational tb = {1, 1e9}; - - get_line(s->pb, line, sizeof(line)); - - if (sscanf(line, "TIMEBASE=%d/%d", &tb.num, &tb.den)) - get_line(s->pb, line, sizeof(line)); - if (!sscanf(line, "START=%"SCNd64, &start)) { - av_log(s, AV_LOG_ERROR, "Expected chapter start timestamp, found %s.\n", line); - start = (s->nb_chapters && s->chapters[s->nb_chapters - 1]->end != AV_NOPTS_VALUE) ? - s->chapters[s->nb_chapters - 1]->end : 0; - } else - get_line(s->pb, line, sizeof(line)); - - if (!sscanf(line, "END=%"SCNd64, &end)) { - av_log(s, AV_LOG_ERROR, "Expected chapter end timestamp, found %s.\n", line); - end = AV_NOPTS_VALUE; - } - - return avpriv_new_chapter(s, s->nb_chapters, tb, start, end, NULL); -} - -static uint8_t *unescape(uint8_t *buf, int size) -{ - uint8_t *ret = av_malloc(size + 1); - uint8_t *p1 = ret, *p2 = buf; - - if (!ret) - return NULL; - - while (p2 < buf + size) { - if (*p2 == '\\') - p2++; - *p1++ = *p2++; - } - *p1 = 0; - return ret; -} - -static int read_tag(uint8_t *line, AVDictionary **m) -{ - uint8_t *key, *value, *p = line; - - /* find first not escaped '=' */ - while (1) { - if (*p == '=') - break; - else if (*p == '\\') - p++; - - if (*p++) - continue; - - return 0; - } - - if (!(key = unescape(line, p - line))) - return AVERROR(ENOMEM); - if (!(value = unescape(p + 1, strlen(p + 1)))) { - av_free(key); - return AVERROR(ENOMEM); - } - - av_dict_set(m, key, value, AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL); - return 0; -} - -static int read_header(AVFormatContext *s) -{ - AVDictionary **m = &s->metadata; - uint8_t line[1024]; - - while(!url_feof(s->pb)) { - get_line(s->pb, line, sizeof(line)); - - if (!memcmp(line, ID_STREAM, strlen(ID_STREAM))) { - AVStream *st = avformat_new_stream(s, NULL); - - if (!st) - return -1; - - st->codec->codec_type = AVMEDIA_TYPE_DATA; - st->codec->codec_id = AV_CODEC_ID_FFMETADATA; - - m = &st->metadata; - } else if (!memcmp(line, ID_CHAPTER, strlen(ID_CHAPTER))) { - AVChapter *ch = read_chapter(s); - - if (!ch) - return -1; - - m = &ch->metadata; - } else - read_tag(line, m); - } - - s->start_time = 0; - if (s->nb_chapters) - s->duration = av_rescale_q(s->chapters[s->nb_chapters - 1]->end, - s->chapters[s->nb_chapters - 1]->time_base, - AV_TIME_BASE_Q); - - return 0; -} - -static int read_packet(AVFormatContext *s, AVPacket *pkt) -{ - return AVERROR_EOF; -} - -AVInputFormat ff_ffmetadata_demuxer = { - .name = "ffmetadata", - .long_name = NULL_IF_CONFIG_SMALL("FFmpeg metadata in text"), - .read_probe = probe, - .read_header = read_header, - .read_packet = read_packet, -}; |