diff options
Diffstat (limited to 'ffmpeg1/libavformat/subtitles.c')
| -rw-r--r-- | ffmpeg1/libavformat/subtitles.c | 231 |
1 files changed, 0 insertions, 231 deletions
diff --git a/ffmpeg1/libavformat/subtitles.c b/ffmpeg1/libavformat/subtitles.c deleted file mode 100644 index 2af0450..0000000 --- a/ffmpeg1/libavformat/subtitles.c +++ /dev/null @@ -1,231 +0,0 @@ -/* - * Copyright (c) 2012 Clément Bœsch - * - * 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 "avformat.h" -#include "subtitles.h" -#include "libavutil/avassert.h" -#include "libavutil/avstring.h" - -AVPacket *ff_subtitles_queue_insert(FFDemuxSubtitlesQueue *q, - const uint8_t *event, int len, int merge) -{ - AVPacket *subs, *sub; - - if (merge && q->nb_subs > 0) { - /* merge with previous event */ - - int old_len; - sub = &q->subs[q->nb_subs - 1]; - old_len = sub->size; - if (av_grow_packet(sub, len) < 0) - return NULL; - memcpy(sub->data + old_len, event, len); - } else { - /* new event */ - - if (q->nb_subs >= INT_MAX/sizeof(*q->subs) - 1) - return NULL; - subs = av_fast_realloc(q->subs, &q->allocated_size, - (q->nb_subs + 1) * sizeof(*q->subs)); - if (!subs) - return NULL; - q->subs = subs; - sub = &subs[q->nb_subs++]; - if (av_new_packet(sub, len) < 0) - return NULL; - sub->flags |= AV_PKT_FLAG_KEY; - sub->pts = sub->dts = 0; - memcpy(sub->data, event, len); - } - return sub; -} - -static int cmp_pkt_sub(const void *a, const void *b) -{ - const AVPacket *s1 = a; - const AVPacket *s2 = b; - if (s1->pts == s2->pts) { - if (s1->pos == s2->pos) - return 0; - return s1->pos > s2->pos ? 1 : -1; - } - return s1->pts > s2->pts ? 1 : -1; -} - -void ff_subtitles_queue_finalize(FFDemuxSubtitlesQueue *q) -{ - int i; - - qsort(q->subs, q->nb_subs, sizeof(*q->subs), cmp_pkt_sub); - for (i = 0; i < q->nb_subs; i++) - if (q->subs[i].duration == -1 && i < q->nb_subs - 1) - q->subs[i].duration = q->subs[i + 1].pts - q->subs[i].pts; -} - -int ff_subtitles_queue_read_packet(FFDemuxSubtitlesQueue *q, AVPacket *pkt) -{ - AVPacket *sub = q->subs + q->current_sub_idx; - - if (q->current_sub_idx == q->nb_subs) - return AVERROR_EOF; - av_copy_packet(pkt, sub); - - pkt->dts = pkt->pts; - q->current_sub_idx++; - return 0; -} - -int ff_subtitles_queue_seek(FFDemuxSubtitlesQueue *q, AVFormatContext *s, int stream_index, - int64_t min_ts, int64_t ts, int64_t max_ts, int flags) -{ - if (flags & AVSEEK_FLAG_BYTE) { - return AVERROR(ENOSYS); - } else if (flags & AVSEEK_FLAG_FRAME) { - if (ts < 0 || ts >= q->nb_subs) - return AVERROR(ERANGE); - q->current_sub_idx = ts; - } else { - int i, idx = -1; - int64_t min_ts_diff = INT64_MAX; - int64_t ts_selected; - /* TODO: q->subs[] is sorted by pts so we could do a binary search */ - for (i = 0; i < q->nb_subs; i++) { - int64_t pts = q->subs[i].pts; - uint64_t ts_diff = FFABS(pts - ts); - if (pts >= min_ts && pts <= max_ts && ts_diff < min_ts_diff) { - min_ts_diff = ts_diff; - idx = i; - } - } - if (idx < 0) - return AVERROR(ERANGE); - /* look back in the latest subtitles for overlapping subtitles */ - ts_selected = q->subs[idx].pts; - for (i = idx - 1; i >= 0; i--) { - if (q->subs[i].duration <= 0) - continue; - if (q->subs[i].pts > ts_selected - q->subs[i].duration) - idx = i; - else - break; - } - q->current_sub_idx = idx; - } - return 0; -} - -void ff_subtitles_queue_clean(FFDemuxSubtitlesQueue *q) -{ - int i; - - for (i = 0; i < q->nb_subs; i++) - av_free_packet(&q->subs[i]); - av_freep(&q->subs); - q->nb_subs = q->allocated_size = q->current_sub_idx = 0; -} - -int ff_smil_extract_next_chunk(AVIOContext *pb, AVBPrint *buf, char *c) -{ - int i = 0; - char end_chr; - - if (!*c) // cached char? - *c = avio_r8(pb); - if (!*c) - return 0; - - end_chr = *c == '<' ? '>' : '<'; - do { - av_bprint_chars(buf, *c, 1); - *c = avio_r8(pb); - i++; - } while (*c != end_chr && *c); - if (end_chr == '>') { - av_bprint_chars(buf, '>', 1); - *c = 0; - } - return i; -} - -const char *ff_smil_get_attr_ptr(const char *s, const char *attr) -{ - int in_quotes = 0; - const int len = strlen(attr); - - while (*s) { - while (*s) { - if (!in_quotes && av_isspace(*s)) - break; - in_quotes ^= *s == '"'; // XXX: support escaping? - s++; - } - while (av_isspace(*s)) - s++; - if (!av_strncasecmp(s, attr, len) && s[len] == '=') - return s + len + 1 + (s[len + 1] == '"'); - } - return NULL; -} - -static inline int is_eol(char c) -{ - return c == '\r' || c == '\n'; -} - -void ff_subtitles_read_chunk(AVIOContext *pb, AVBPrint *buf) -{ - char eol_buf[5]; - int n = 0, i = 0, nb_eol = 0; - - av_bprint_clear(buf); - - for (;;) { - char c = avio_r8(pb); - - if (!c) - break; - - /* ignore all initial line breaks */ - if (n == 0 && is_eol(c)) - continue; - - /* line break buffering: we don't want to add the trailing \r\n */ - if (is_eol(c)) { - nb_eol += c == '\n'; - if (nb_eol == 2) - break; - eol_buf[i++] = c; - if (i == sizeof(eol_buf) - 1) - break; - continue; - } - - /* only one line break followed by data: we flush the line breaks - * buffer */ - if (i) { - eol_buf[i] = 0; - av_bprintf(buf, "%s", eol_buf); - i = nb_eol = 0; - } - - av_bprint_chars(buf, c, 1); - n++; - } -} |