diff options
Diffstat (limited to 'libavformat/srtdec.c')
| -rw-r--r-- | libavformat/srtdec.c | 147 |
1 files changed, 105 insertions, 42 deletions
diff --git a/libavformat/srtdec.c b/libavformat/srtdec.c index 9db5133a21..7f911bd05b 100644 --- a/libavformat/srtdec.c +++ b/libavformat/srtdec.c @@ -2,101 +2,164 @@ * SubRip subtitle demuxer * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "avformat.h" #include "internal.h" +#include "subtitles.h" +#include "libavutil/bprint.h" #include "libavutil/intreadwrite.h" +typedef struct { + FFDemuxSubtitlesQueue q; +} SRTContext; + static int srt_probe(AVProbeData *p) { - unsigned char *ptr = p->buf; + const unsigned char *ptr = p->buf; int i, v, num = 0; if (AV_RB24(ptr) == 0xEFBBBF) ptr += 3; /* skip UTF-8 BOM */ + while (*ptr == '\r' || *ptr == '\n') + ptr++; for (i=0; i<2; i++) { - if (num == i && sscanf(ptr, "%*d:%*2d:%*2d%*1[,.]%*3d --> %*d:%*2d:%*2d%*1[,.]%3d", &v) == 1) + if ((num == i || num + 1 == i) + && sscanf(ptr, "%*d:%*2d:%*2d%*1[,.]%*3d --> %*d:%*2d:%*2d%*1[,.]%3d", &v) == 1) return AVPROBE_SCORE_MAX; num = atoi(ptr); - ptr += strcspn(ptr, "\n") + 1; + ptr += ff_subtitles_next_line(ptr); } return 0; } +static int64_t get_pts(const char **buf, int *duration, + int32_t *x1, int32_t *y1, int32_t *x2, int32_t *y2) +{ + int i; + + for (i=0; i<2; i++) { + int hh1, mm1, ss1, ms1; + int hh2, mm2, ss2, ms2; + if (sscanf(*buf, "%d:%2d:%2d%*1[,.]%3d --> %d:%2d:%2d%*1[,.]%3d" + "%*[ ]X1:%u X2:%u Y1:%u Y2:%u", + &hh1, &mm1, &ss1, &ms1, + &hh2, &mm2, &ss2, &ms2, + x1, x2, y1, y2) >= 8) { + int64_t start = (hh1*3600LL + mm1*60LL + ss1) * 1000LL + ms1; + int64_t end = (hh2*3600LL + mm2*60LL + ss2) * 1000LL + ms2; + *duration = end - start; + *buf += ff_subtitles_next_line(*buf); + return start; + } + *buf += ff_subtitles_next_line(*buf); + } + return AV_NOPTS_VALUE; +} + static int srt_read_header(AVFormatContext *s) { + SRTContext *srt = s->priv_data; + AVBPrint buf; AVStream *st = avformat_new_stream(s, NULL); + int res = 0; + if (!st) - return -1; + return AVERROR(ENOMEM); avpriv_set_pts_info(st, 64, 1, 1000); st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; - st->codec->codec_id = AV_CODEC_ID_SRT; - return 0; -} + st->codec->codec_id = AV_CODEC_ID_SUBRIP; -static int64_t get_pts(const char *buf) -{ - int i, v, hour, min, sec, hsec; + av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); - for (i=0; i<2; i++) { - if (sscanf(buf, "%d:%2d:%2d%*1[,.]%3d --> %*d:%*2d:%*2d%*1[,.]%3d", - &hour, &min, &sec, &hsec, &v) == 5) { - min += 60*hour; - sec += 60*min; - return sec*1000+hsec; + while (!url_feof(s->pb)) { + ff_subtitles_read_chunk(s->pb, &buf); + + if (buf.len) { + int64_t pos = avio_tell(s->pb); + int64_t pts; + int duration; + const char *ptr = buf.str; + int32_t x1 = -1, y1 = -1, x2 = -1, y2 = -1; + AVPacket *sub; + + pts = get_pts(&ptr, &duration, &x1, &y1, &x2, &y2); + if (pts != AV_NOPTS_VALUE) { + int len = buf.len - (ptr - buf.str); + if (len <= 0) + continue; + sub = ff_subtitles_queue_insert(&srt->q, ptr, len, 0); + if (!sub) { + res = AVERROR(ENOMEM); + goto end; + } + sub->pos = pos; + sub->pts = pts; + sub->duration = duration; + if (x1 != -1) { + uint8_t *p = av_packet_new_side_data(sub, AV_PKT_DATA_SUBTITLE_POSITION, 16); + if (p) { + AV_WL32(p, x1); + AV_WL32(p + 4, y1); + AV_WL32(p + 8, x2); + AV_WL32(p + 12, y2); + } + } + } } - buf += strcspn(buf, "\n") + 1; } - return AV_NOPTS_VALUE; + + ff_subtitles_queue_finalize(&srt->q); + +end: + av_bprint_finalize(&buf, NULL); + return res; +} + +static int srt_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + SRTContext *srt = s->priv_data; + return ff_subtitles_queue_read_packet(&srt->q, pkt); } -static inline int is_eol(char c) +static int srt_read_seek(AVFormatContext *s, int stream_index, + int64_t min_ts, int64_t ts, int64_t max_ts, int flags) { - return c == '\r' || c == '\n'; + SRTContext *srt = s->priv_data; + return ff_subtitles_queue_seek(&srt->q, s, stream_index, + min_ts, ts, max_ts, flags); } -static int srt_read_packet(AVFormatContext *s, AVPacket *pkt) +static int srt_read_close(AVFormatContext *s) { - char buffer[2048], *ptr = buffer, *ptr2; - int64_t pos = avio_tell(s->pb); - int res = AVERROR_EOF; - - do { - ptr2 = ptr; - ptr += ff_get_line(s->pb, ptr, sizeof(buffer)+buffer-ptr); - } while (!is_eol(*ptr2) && !s->pb->eof_reached && ptr-buffer<sizeof(buffer)-1); - - if (buffer[0] && !(res = av_new_packet(pkt, ptr-buffer))) { - memcpy(pkt->data, buffer, pkt->size); - pkt->flags |= AV_PKT_FLAG_KEY; - pkt->pos = pos; - pkt->pts = pkt->dts = get_pts(pkt->data); - } - return res; + SRTContext *srt = s->priv_data; + ff_subtitles_queue_clean(&srt->q); + return 0; } AVInputFormat ff_srt_demuxer = { .name = "srt", .long_name = NULL_IF_CONFIG_SMALL("SubRip subtitle"), + .priv_data_size = sizeof(SRTContext), .read_probe = srt_probe, .read_header = srt_read_header, .read_packet = srt_read_packet, - .flags = AVFMT_GENERIC_INDEX, + .read_seek2 = srt_read_seek, + .read_close = srt_read_close, }; |