int avpriv_dnxhd_get_frame_size(int cid)
{
int i = ff_dnxhd_get_cid_table(cid);
if (i<0)
return i;
return ff_dnxhd_cid_table[i].frame_size;
}
static int dnxhd_init_vlc(DNXHDContext *ctx, int cid)
{
if (!ctx->cid_table) {
int index;
if ((index = ff_dnxhd_get_cid_table(cid)) < 0) {
av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %d\n", cid);
return -1;
}
ctx->cid_table = &ff_dnxhd_cid_table[index];
init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
ctx->cid_table->ac_bits, 1, 1,
ctx->cid_table->ac_codes, 2, 2, 0);
init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, ctx->cid_table->bit_depth+4,
ctx->cid_table->dc_bits, 1, 1,
ctx->cid_table->dc_codes, 1, 1, 0);
init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
ctx->cid_table->run_bits, 1, 1,
ctx->cid_table->run_codes, 2, 2, 0);
ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, ff_zigzag_direct);
}
return 0;
}
static int dnxhd_encode_init(AVCodecContext *avctx)
{
DNXHDEncContext *ctx = avctx->priv_data;
int i, index;
ctx->cid = ff_dnxhd_find_cid(avctx);
if (!ctx->cid || avctx->pix_fmt != PIX_FMT_YUV422P) {
av_log(avctx, AV_LOG_ERROR, "video parameters incompatible with DNxHD\n");
return -1;
}
av_log(avctx, AV_LOG_DEBUG, "cid %d\n", ctx->cid);
index = ff_dnxhd_get_cid_table(ctx->cid);
ctx->cid_table = &ff_dnxhd_cid_table[index];
ctx->m.avctx = avctx;
ctx->m.mb_intra = 1;
ctx->m.h263_aic = 1;
dsputil_init(&ctx->m.dsp, avctx);
ff_dct_common_init(&ctx->m);
if (!ctx->m.dct_quantize)
ctx->m.dct_quantize = dct_quantize_c;
ctx->m.mb_height = (avctx->height + 15) / 16;
ctx->m.mb_width = (avctx->width + 15) / 16;
if (avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
ctx->interlaced = 1;
ctx->m.mb_height /= 2;
}
ctx->m.mb_num = ctx->m.mb_height * ctx->m.mb_width;
if (avctx->intra_quant_bias != FF_DEFAULT_QUANT_BIAS)
ctx->m.intra_quant_bias = avctx->intra_quant_bias;
if (dnxhd_init_qmat(ctx, ctx->m.intra_quant_bias, 0) < 0) // XXX tune lbias/cbias
return -1;
if (dnxhd_init_vlc(ctx) < 0)
return -1;
if (dnxhd_init_rc(ctx) < 0)
return -1;
CHECKED_ALLOCZ(ctx->slice_size, ctx->m.mb_height*sizeof(uint32_t));
CHECKED_ALLOCZ(ctx->mb_bits, ctx->m.mb_num *sizeof(uint16_t));
CHECKED_ALLOCZ(ctx->mb_qscale, ctx->m.mb_num *sizeof(uint8_t));
ctx->frame.key_frame = 1;
ctx->frame.pict_type = FF_I_TYPE;
ctx->m.avctx->coded_frame = &ctx->frame;
if (avctx->thread_count > MAX_THREADS || (avctx->thread_count > ctx->m.mb_height)) {
av_log(avctx, AV_LOG_ERROR, "too many threads\n");
return -1;
}
ctx->thread[0] = ctx;
for (i = 1; i < avctx->thread_count; i++) {
ctx->thread[i] = av_malloc(sizeof(DNXHDEncContext));
memcpy(ctx->thread[i], ctx, sizeof(DNXHDEncContext));
}
for (i = 0; i < avctx->thread_count; i++) {
ctx->thread[i]->m.start_mb_y = (ctx->m.mb_height*(i ) + avctx->thread_count/2) / avctx->thread_count;
ctx->thread[i]->m.end_mb_y = (ctx->m.mb_height*(i+1) + avctx->thread_count/2) / avctx->thread_count;
}
return 0;
fail: //for CHECKED_ALLOCZ
return -1;
}
