Function encode_thread

libavcodec/mpegvideo_enc.c:2942–3579

}

static int encode_thread(AVCodecContext *c, void *arg){
    MPVEncContext *const s = *(void**)arg;
    int chr_h = 16 >> s->c.chroma_y_shift;
    int i;
    MBBackup best_s = { 0 }, backup_s;
    uint8_t bit_buf[2][MAX_MB_BYTES];
    // + 2 because ff_copy_bits() overreads
    uint8_t bit_buf2[2][MAX_PB2_MB_SIZE + 2];
    uint8_t bit_buf_tex[2][MAX_AC_TEX_MB_SIZE + 2];
    PutBitContext pb[2], pb2[2], tex_pb[2];

    for(i=0; i<2; i++){
        init_put_bits(&pb    [i], bit_buf    [i], MAX_MB_BYTES);
        init_put_bits(&pb2   [i], bit_buf2   [i], MAX_PB2_MB_SIZE);
        init_put_bits(&tex_pb[i], bit_buf_tex[i], MAX_AC_TEX_MB_SIZE);
    }

    s->last_bits= put_bits_count(&s->pb);
    s->mv_bits=0;
    s->misc_bits=0;
    s->i_tex_bits=0;
    s->p_tex_bits=0;
    s->i_count=0;

    for(i=0; i<3; i++){
        /* init last dc values */
        /* note: quant matrix value (8) is implied here */
        s->last_dc[i] = 128 << s->c.intra_dc_precision;

        s->encoding_error[i] = 0;
    }
    if (s->c.codec_id == AV_CODEC_ID_AMV) {
        s->last_dc[0] = 128 * 8 / 13;
        s->last_dc[1] = 128 * 8 / 14;
        s->last_dc[2] = 128 * 8 / 14;
#if CONFIG_MPEG4_ENCODER
    } else if (s->partitioned_frame) {
        av_assert1(s->c.codec_id == AV_CODEC_ID_MPEG4);
        ff_mpeg4_init_partitions(s);
#endif
    }
    s->mb_skip_run = 0;
    memset(s->c.last_mv, 0, sizeof(s->c.last_mv));

    s->last_mv_dir = 0;

    s->c.resync_mb_x = 0;
    s->c.resync_mb_y = 0;
    s->c.first_slice_line = 1;
    s->ptr_lastgob = s->pb.buf;
    for (int mb_y_order = s->c.start_mb_y; mb_y_order < s->c.end_mb_y; mb_y_order++) {
        int mb_y;
        if (CONFIG_SPEEDHQ_ENCODER && s->c.codec_id == AV_CODEC_ID_SPEEDHQ) {
            int first_in_slice;
            mb_y = ff_speedhq_mb_y_order_to_mb(mb_y_order, s->c.mb_height, &first_in_slice);
            if (first_in_slice && mb_y_order != s->c.start_mb_y)
                ff_speedhq_end_slice(s);
            s->last_dc[0] = s->last_dc[1] = s->last_dc[2] = 1024;