Function ism_write_header

libavformat/smoothstreamingenc.c:283–389

}

static int ism_write_header(AVFormatContext *s)
{
    SmoothStreamingContext *c = s->priv_data;
    int ret = 0, i;

    if (mkdir(s->url, 0777) == -1 && errno != EEXIST) {
        av_log(s, AV_LOG_ERROR, "mkdir failed\n");
        return AVERROR(errno);
    }


    c->streams = av_calloc(s->nb_streams, sizeof(*c->streams));
    if (!c->streams) {
        return AVERROR(ENOMEM);
    }

    for (i = 0; i < s->nb_streams; i++) {
        OutputStream *os = &c->streams[i];
        AVFormatContext *ctx;
        AVStream *st;
        AVDictionary *opts = NULL;

        if (!s->streams[i]->codecpar->bit_rate) {
            av_log(s, AV_LOG_WARNING, "No bit rate set for stream %d\n", i);
            // create a tmp name for the directory of fragments
            snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(Tmp_%d)", s->url, i);
        } else {
            snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(%"PRId64")", s->url, s->streams[i]->codecpar->bit_rate);
        }

        if (mkdir(os->dirname, 0777) == -1 && errno != EEXIST) {
            av_log(s, AV_LOG_ERROR, "mkdir failed\n");
            return AVERROR(errno);
        }

        os->ctx = ctx = avformat_alloc_context();
        if (!ctx) {
            return AVERROR(ENOMEM);
        }
        if ((ret = ff_copy_whiteblacklists(ctx, s)) < 0)
            return ret;
        EXTERN const FFOutputFormat ff_ismv_muxer;
        ctx->oformat = &ff_ismv_muxer.p;
        ctx->interrupt_callback = s->interrupt_callback;

        if (!(st = avformat_new_stream(ctx, NULL))) {
            return AVERROR(ENOMEM);
        }
        if ((ret = avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar)) < 0) {
            return ret;
        }
        st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
        st->time_base = s->streams[i]->time_base;

        ctx->pb = avio_alloc_context(os->iobuf, sizeof(os->iobuf), 1, os, NULL, ism_write, ism_seek);
        if (!ctx->pb) {
            return AVERROR(ENOMEM);
        }