C++ (Cpp) put_bits_left Exemples

Exemple #1

static int cbs_write_ue_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc,
                               const char *name, uint32_t value,
                               uint32_t range_min, uint32_t range_max)
{
    int len;

    if (value < range_min || value > range_max) {
        av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
               "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
               name, value, range_min, range_max);
        return AVERROR_INVALIDDATA;
    }
    av_assert0(value != UINT32_MAX);

    len = av_log2(value + 1);
    if (put_bits_left(pbc) < 2 * len + 1)
        return AVERROR(ENOSPC);

    if (ctx->trace_enable) {
        char bits[65];
        int i;

        for (i = 0; i < len; i++)
            bits[i] = '0';
        bits[len] = '1';
        for (i = 0; i < len; i++)
            bits[len + i + 1] = (value + 1) >> (len - i - 1) & 1 ? '1' : '0';
        bits[len + len + 1] = 0;

        ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc), name, bits, value);
    }

Exemple #2

Fichier : cbs_jpeg.c Projet : BtbN/FFmpeg

static int cbs_jpeg_write_scan(CodedBitstreamContext *ctx,
                               CodedBitstreamUnit *unit,
                               PutBitContext *pbc)
{
    JPEGRawScan *scan = unit->content;
    int i, err;

    err = cbs_jpeg_write_scan_header(ctx, pbc, &scan->header);
    if (err < 0)
        return err;

    if (scan->data) {
        if (scan->data_size * 8 > put_bits_left(pbc))
            return AVERROR(ENOSPC);

        for (i = 0; i < scan->data_size; i++)
            put_bits(pbc, 8, scan->data[i]);
    }

    return 0;
}