int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options) { AVFormatContext *s = *ps; int ret = 0; AVDictionary *tmp = NULL; ID3v2ExtraMeta *id3v2_extra_meta = NULL; if (!s && !(s = avformat_alloc_context())) return AVERROR(ENOMEM); if (!s->av_class) { av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n"); return AVERROR(EINVAL); } if (fmt) s->iformat = fmt; if (options) av_dict_copy(&tmp, *options, 0); if ((ret = av_opt_set_dict(s, &tmp)) < 0) goto fail; if ((ret = init_input(s, filename, &tmp)) < 0) goto fail; s->probe_score = ret; avio_skip(s->pb, s->skip_initial_bytes); /* Check filename in case an image number is expected. */ if (s->iformat->flags & AVFMT_NEEDNUMBER) { if (!av_filename_number_test(filename)) { ret = AVERROR(EINVAL); goto fail; } } s->duration = s->start_time = AV_NOPTS_VALUE; av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename)); /* Allocate private data. */ if (s->iformat->priv_data_size > 0) { if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) { ret = AVERROR(ENOMEM); goto fail; } if (s->iformat->priv_class) { *(const AVClass **) s->priv_data = s->iformat->priv_class; av_opt_set_defaults(s->priv_data); if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0) goto fail; } } /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */ if (s->pb) ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta); if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header) if ((ret = s->iformat->read_header(s)) < 0) goto fail; if (id3v2_extra_meta) { if (!strcmp(s->iformat->name, "mp3") || !strcmp(s->iformat->name, "aac") || !strcmp(s->iformat->name, "tta")) { if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) goto fail; } else av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n"); } ff_id3v2_free_extra_meta(&id3v2_extra_meta); if ((ret = avformat_queue_attached_pictures(s)) < 0) goto fail; if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset) s->data_offset = avio_tell(s->pb); s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE; if (options) { av_dict_free(options); *options = tmp; } *ps = s; return 0; fail: ff_id3v2_free_extra_meta(&id3v2_extra_meta); av_dict_free(&tmp); if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO)) avio_close(s->pb); avformat_free_context(s); *ps = NULL; return ret; }