Ejemplo n.º 1
0
static int srt_read_header(AVFormatContext *s)
{
    SRTContext *srt = s->priv_data;
    AVBPrint buf;
    AVStream *st = avformat_new_stream(s, NULL);
    int res = 0;
    FFTextReader tr;
    ff_text_init_avio(s, &tr, s->pb);

    if (!st)
        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_SUBRIP;

    av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);

    while (!ff_text_eof(&tr)) {
        ff_subtitles_read_text_chunk(&tr, &buf);

        if (buf.len) {
            int64_t pos = ff_text_pos(&tr);
            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);
                    }
                }
            }
        }
    }

    ff_subtitles_queue_finalize(&srt->q);

end:
    av_bprint_finalize(&buf, NULL);
    return res;
}
Ejemplo n.º 2
0
static int sami_read_header(AVFormatContext *s)
{
    SAMIContext *sami = s->priv_data;
    AVStream *st = avformat_new_stream(s, NULL);
    AVBPrint buf, hdr_buf;
    char c = 0;
    int res = 0, got_first_sync_point = 0;
    FFTextReader tr;
    ff_text_init_avio(&tr, s->pb);

    if (!st)
        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_SAMI;

    av_bprint_init(&buf,     0, AV_BPRINT_SIZE_UNLIMITED);
    av_bprint_init(&hdr_buf, 0, AV_BPRINT_SIZE_UNLIMITED);

    while (!ff_text_eof(&tr)) {
        AVPacket *sub;
        const int64_t pos = ff_text_pos(&tr) - (c != 0);
        int is_sync, n = ff_smil_extract_next_text_chunk(&tr, &buf, &c);

        if (n == 0)
            break;

        is_sync = !av_strncasecmp(buf.str, "<SYNC", 5);
        if (is_sync)
            got_first_sync_point = 1;

        if (!got_first_sync_point) {
            av_bprintf(&hdr_buf, "%s", buf.str);
        } else {
            sub = ff_subtitles_queue_insert(&sami->q, buf.str, buf.len, !is_sync);
            if (!sub) {
                res = AVERROR(ENOMEM);
                goto end;
            }
            if (is_sync) {
                const char *p = ff_smil_get_attr_ptr(buf.str, "Start");
                sub->pos      = pos;
                sub->pts      = p ? strtol(p, NULL, 10) : 0;
                sub->duration = -1;
            }
        }
        av_bprint_clear(&buf);
    }

    res = avpriv_bprint_to_extradata(st->codec, &hdr_buf);
    if (res < 0)
        goto end;

    ff_subtitles_queue_finalize(&sami->q);

end:
    av_bprint_finalize(&buf, NULL);
    return res;
}
Ejemplo n.º 3
0
static int realtext_read_header(AVFormatContext *s)
{
    RealTextContext *rt = s->priv_data;
    AVStream *st = avformat_new_stream(s, NULL);
    AVBPrint buf;
    char c = 0;
    int res = 0, duration = read_ts("60"); // default duration is 60 seconds
    FFTextReader tr;
    ff_text_init_avio(&tr, s->pb);

    if (!st)
        return AVERROR(ENOMEM);
    avpriv_set_pts_info(st, 64, 1, 100);
    st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
    st->codec->codec_id   = AV_CODEC_ID_REALTEXT;

    av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);

    while (!ff_text_eof(&tr)) {
        AVPacket *sub;
        const int64_t pos = ff_text_pos(&tr) - (c != 0);
        int n = ff_smil_extract_next_text_chunk(&tr, &buf, &c);

        if (n == 0)
            break;

        if (!av_strncasecmp(buf.str, "<window", 7)) {
            /* save header to extradata */
            const char *p = ff_smil_get_attr_ptr(buf.str, "duration");

            if (p)
                duration = read_ts(p);
            st->codec->extradata = av_strdup(buf.str);
            if (!st->codec->extradata) {
                res = AVERROR(ENOMEM);
                goto end;
            }
            st->codec->extradata_size = buf.len + 1;
        } else {
            /* if we just read a <time> tag, introduce a new event, otherwise merge
             * with the previous one */
            int merge = !av_strncasecmp(buf.str, "<time", 5) ? 0 : 1;
            sub = ff_subtitles_queue_insert(&rt->q, buf.str, buf.len, merge);
            if (!sub) {
                res = AVERROR(ENOMEM);
                goto end;
            }
            if (!merge) {
                const char *begin = ff_smil_get_attr_ptr(buf.str, "begin");
                const char *end   = ff_smil_get_attr_ptr(buf.str, "end");

                sub->pos      = pos;
                sub->pts      = begin ? read_ts(begin) : 0;
                sub->duration = end ? (read_ts(end) - sub->pts) : duration;
            }
        }
        av_bprint_clear(&buf);
    }
    ff_subtitles_queue_finalize(&rt->q);

end:
    av_bprint_finalize(&buf, NULL);
    return res;
}
Ejemplo n.º 4
0
static int scc_read_header(AVFormatContext *s)
{
    SCCContext *scc = s->priv_data;
    AVStream *st = avformat_new_stream(s, NULL);
    char line[4096], line2[4096];
    int count = 0, ret = 0;
    ptrdiff_t len2, len;
    uint8_t out[4096];
    FFTextReader tr;

    ff_text_init_avio(s, &tr, s->pb);

    if (!st)
        return AVERROR(ENOMEM);
    avpriv_set_pts_info(st, 64, 1, 1000);
    st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
    st->codecpar->codec_id   = AV_CODEC_ID_EIA_608;

    while (!ff_text_eof(&tr)) {
        const int64_t pos = ff_text_pos(&tr);
        char *saveptr = NULL, *lline;
        int hh1, mm1, ss1, fs1, i;
        int hh2, mm2, ss2, fs2;
        int64_t ts_start, ts_end;
        AVPacket *sub;

        if (count == 0) {
            while (!ff_text_eof(&tr)) {
                len = ff_subtitles_read_line(&tr, line, sizeof(line));
                if (len > 13)
                    break;
            }
        }

        if (!strncmp(line, "Scenarist_SCC V1.0", 18))
            continue;
        if (sscanf(line, "%d:%d:%d%*[:;]%d", &hh1, &mm1, &ss1, &fs1) != 4)
            continue;

        ts_start = (hh1 * 3600LL + mm1 * 60LL + ss1) * 1000LL + fs1 * 33;

        while (!ff_text_eof(&tr)) {
            len2 = ff_subtitles_read_line(&tr, line2, sizeof(line2));
            if (len2 > 13)
                break;
        }
        if (sscanf(line2, "%d:%d:%d%*[:;]%d", &hh2, &mm2, &ss2, &fs2) != 4)
            continue;

        ts_end = (hh2 * 3600LL + mm2 * 60LL + ss2) * 1000LL + fs2 * 33;
        count++;

        lline = (char *)&line;
        lline += 12;

        for (i = 0; i < 4095; i += 3) {
            char *ptr = av_strtok(lline, " ", &saveptr);
            char c1, c2, c3, c4;

            if (!ptr)
                break;

            if (sscanf(ptr, "%c%c%c%c", &c1, &c2, &c3, &c4) != 4)
                break;

            lline = NULL;
            out[i+0] = 0xfc;
            out[i+1] = convert(c2) | (convert(c1) << 4);
            out[i+2] = convert(c4) | (convert(c3) << 4);
        }
        out[i] = 0;

        sub = ff_subtitles_queue_insert(&scc->q, out, i, 0);
        if (!sub)
            return AVERROR(ENOMEM);

        sub->pos = pos;
        sub->pts = ts_start;
        sub->duration = FFMAX(1200, ts_end - ts_start);
        memmove(line, line2, sizeof(line));
        FFSWAP(ptrdiff_t, len, len2);
    }

    ff_subtitles_queue_finalize(s, &scc->q);

    return ret;
}