Function iv_alloc_frames

libavcodec/indeo3.c:97–141

}

static av_cold int iv_alloc_frames(Indeo3DecodeContext *s)
{
    int luma_width    = (s->width           + 3) & ~3,
        luma_height   = (s->height          + 3) & ~3,
        chroma_width  = ((luma_width  >> 2) + 3) & ~3,
        chroma_height = ((luma_height >> 2) + 3) & ~3,
        luma_pixels   = luma_width   * luma_height,
        chroma_pixels = chroma_width * chroma_height,
        i;
    unsigned int bufsize = luma_pixels * 2 + luma_width * 3 +
                          (chroma_pixels   + chroma_width) * 4;

    av_freep(&s->buf);
    if(!(s->buf = av_malloc(bufsize)))
        return AVERROR(ENOMEM);
    s->iv_frame[0].y_w = s->iv_frame[1].y_w = luma_width;
    s->iv_frame[0].y_h = s->iv_frame[1].y_h = luma_height;
    s->iv_frame[0].uv_w = s->iv_frame[1].uv_w = chroma_width;
    s->iv_frame[0].uv_h = s->iv_frame[1].uv_h = chroma_height;

    s->iv_frame[0].Ybuf = s->buf + luma_width;
    i = luma_pixels + luma_width * 2;
    s->iv_frame[1].Ybuf = s->buf + i;
    i += (luma_pixels + luma_width);
    s->iv_frame[0].Ubuf = s->buf + i;
    i += (chroma_pixels + chroma_width);
    s->iv_frame[1].Ubuf = s->buf + i;
    i += (chroma_pixels + chroma_width);
    s->iv_frame[0].Vbuf = s->buf + i;
    i += (chroma_pixels + chroma_width);
    s->iv_frame[1].Vbuf = s->buf + i;

    for(i = 1; i <= luma_width; i++)
        s->iv_frame[0].Ybuf[-i] = s->iv_frame[1].Ybuf[-i] =
            s->iv_frame[0].Ubuf[-i] = 0x80;

    for(i = 1; i <= chroma_width; i++) {
        s->iv_frame[1].Ubuf[-i] = 0x80;
        s->iv_frame[0].Vbuf[-i] = 0x80;
        s->iv_frame[1].Vbuf[-i] = 0x80;
        s->iv_frame[1].Vbuf[chroma_pixels+i-1] = 0x80;
    }

    return 0;
}

static av_cold void iv_free_func(Indeo3DecodeContext *s)
{