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ffmpeg/libavcodec/dnxhdenc.c

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/*
* VC3/DNxHD encoder
* Copyright (c) 2007 Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
*
* VC-3 encoder funded by the British Broadcasting Corporation
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
//#define DEBUG
#define RC_VARIANCE 1 // use variance or ssd for fast rc
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
#include "dnxhddata.h"
typedef struct {
uint16_t mb;
int value;
} RCCMPEntry;
typedef struct {
int ssd;
int bits;
} RCEntry;
int dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
typedef struct DNXHDEncContext {
MpegEncContext m; ///< Used for quantization dsp functions
AVFrame frame;
int cid;
const CIDEntry *cid_table;
uint8_t *msip; ///< Macroblock Scan Indexes Payload
uint32_t *slice_size;
struct DNXHDEncContext *thread[MAX_THREADS];
unsigned dct_y_offset;
unsigned dct_uv_offset;
int interlaced;
int cur_field;
DECLARE_ALIGNED_16(DCTELEM, blocks[8][64]);
int (*qmatrix_c) [64];
int (*qmatrix_l) [64];
uint16_t (*qmatrix_l16)[2][64];
uint16_t (*qmatrix_c16)[2][64];
unsigned frame_bits;
uint8_t *src[3];
uint16_t *table_vlc_codes;
uint8_t *table_vlc_bits;
uint16_t *table_run_codes;
uint8_t *table_run_bits;
/** Rate control */
unsigned slice_bits;
unsigned qscale;
unsigned lambda;
unsigned thread_size;
uint16_t *mb_bits;
uint8_t *mb_qscale;
RCCMPEntry *mb_cmp;
RCEntry (*mb_rc)[8160];
} DNXHDEncContext;
#define LAMBDA_FRAC_BITS 10
static int dnxhd_init_vlc(DNXHDEncContext *ctx)
{
int i;
CHECKED_ALLOCZ(ctx->table_vlc_codes, 449*2);
CHECKED_ALLOCZ(ctx->table_vlc_bits, 449);
CHECKED_ALLOCZ(ctx->table_run_codes, 63*2);
CHECKED_ALLOCZ(ctx->table_run_bits, 63);
for (i = 0; i < 257; i++) {
int level = ctx->cid_table->ac_level[i] +
(ctx->cid_table->ac_run_flag[i] << 7) + (ctx->cid_table->ac_index_flag[i] << 8);
assert(level < 449);
if (ctx->cid_table->ac_level[i] == 64 && ctx->cid_table->ac_index_flag[i])
level -= 64; // use 0+(1<<8) level
ctx->table_vlc_codes[level] = ctx->cid_table->ac_codes[i];
ctx->table_vlc_bits [level] = ctx->cid_table->ac_bits[i];
}
for (i = 0; i < 62; i++) {
int run = ctx->cid_table->run[i];
assert(run < 63);
ctx->table_run_codes[run] = ctx->cid_table->run_codes[i];
ctx->table_run_bits [run] = ctx->cid_table->run_bits[i];
}
return 0;
fail:
return -1;
}
static int dnxhd_init_qmat(DNXHDEncContext *ctx, int lbias, int cbias)
{
// init first elem to 1 to avoid div by 0 in convert_matrix
uint16_t weight_matrix[64] = {1,}; // convert_matrix needs uint16_t*
int qscale, i;
CHECKED_ALLOCZ(ctx->qmatrix_l, (ctx->m.avctx->qmax+1) * 64 * sizeof(int));
CHECKED_ALLOCZ(ctx->qmatrix_c, (ctx->m.avctx->qmax+1) * 64 * sizeof(int));
CHECKED_ALLOCZ(ctx->qmatrix_l16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t));
CHECKED_ALLOCZ(ctx->qmatrix_c16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t));
for (i = 1; i < 64; i++) {
int j = ctx->m.dsp.idct_permutation[ff_zigzag_direct[i]];
weight_matrix[j] = ctx->cid_table->luma_weight[i];
}
ff_convert_matrix(&ctx->m.dsp, ctx->qmatrix_l, ctx->qmatrix_l16, weight_matrix,
ctx->m.intra_quant_bias, 1, ctx->m.avctx->qmax, 1);
for (i = 1; i < 64; i++) {
int j = ctx->m.dsp.idct_permutation[ff_zigzag_direct[i]];
weight_matrix[j] = ctx->cid_table->chroma_weight[i];
}
ff_convert_matrix(&ctx->m.dsp, ctx->qmatrix_c, ctx->qmatrix_c16, weight_matrix,
ctx->m.intra_quant_bias, 1, ctx->m.avctx->qmax, 1);
for (qscale = 1; qscale <= ctx->m.avctx->qmax; qscale++) {
for (i = 0; i < 64; i++) {
ctx->qmatrix_l [qscale] [i] <<= 2; ctx->qmatrix_c [qscale] [i] <<= 2;
ctx->qmatrix_l16[qscale][0][i] <<= 2; ctx->qmatrix_l16[qscale][1][i] <<= 2;
ctx->qmatrix_c16[qscale][0][i] <<= 2; ctx->qmatrix_c16[qscale][1][i] <<= 2;
}
}
return 0;
fail:
return -1;
}
static int dnxhd_init_rc(DNXHDEncContext *ctx)
{
CHECKED_ALLOCZ(ctx->mb_rc, 8160*ctx->m.avctx->qmax*sizeof(RCEntry));
if (ctx->m.avctx->mb_decision != FF_MB_DECISION_RD)
CHECKED_ALLOCZ(ctx->mb_cmp, ctx->m.mb_num*sizeof(RCCMPEntry));
ctx->frame_bits = (ctx->cid_table->coding_unit_size - 640 - 4) * 8;
ctx->qscale = 1;
ctx->lambda = 2<<LAMBDA_FRAC_BITS; // qscale 2
return 0;
fail:
return -1;
}
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;
}
static int dnxhd_write_header(AVCodecContext *avctx, uint8_t *buf)
{
DNXHDEncContext *ctx = avctx->priv_data;
const uint8_t header_prefix[5] = { 0x00,0x00,0x02,0x80,0x01 };
memcpy(buf, header_prefix, 5);
buf[5] = ctx->interlaced ? ctx->cur_field+2 : 0x01;
buf[6] = 0x80; // crc flag off
buf[7] = 0xa0; // reserved
AV_WB16(buf + 0x18, avctx->height); // ALPF
AV_WB16(buf + 0x1a, avctx->width); // SPL
AV_WB16(buf + 0x1d, avctx->height); // NAL
buf[0x21] = 0x38; // FIXME 8 bit per comp
buf[0x22] = 0x88 + (ctx->frame.interlaced_frame<<2);
AV_WB32(buf + 0x28, ctx->cid); // CID
buf[0x2c] = ctx->interlaced ? 0 : 0x80;
buf[0x5f] = 0x01; // UDL
buf[0x167] = 0x02; // reserved
AV_WB16(buf + 0x16a, ctx->m.mb_height * 4 + 4); // MSIPS
buf[0x16d] = ctx->m.mb_height; // Ns
buf[0x16f] = 0x10; // reserved
ctx->msip = buf + 0x170;
return 0;
}
static av_always_inline void dnxhd_encode_dc(DNXHDEncContext *ctx, int diff)
{
int nbits;
if (diff < 0) {
nbits = av_log2_16bit(-2*diff);
diff--;
} else {
nbits = av_log2_16bit(2*diff);
}
put_bits(&ctx->m.pb, ctx->cid_table->dc_bits[nbits] + nbits,
(ctx->cid_table->dc_codes[nbits]<<nbits) + (diff & ((1 << nbits) - 1)));
}
static av_always_inline void dnxhd_encode_block(DNXHDEncContext *ctx, DCTELEM *block, int last_index, int n)
{
int last_non_zero = 0;
int offset = 0;
int slevel, i, j;
dnxhd_encode_dc(ctx, block[0] - ctx->m.last_dc[n]);
ctx->m.last_dc[n] = block[0];
for (i = 1; i <= last_index; i++) {
j = ctx->m.intra_scantable.permutated[i];
slevel = block[j];
if (slevel) {
int run_level = i - last_non_zero - 1;
int sign;
MASK_ABS(sign, slevel);
if (slevel > 64) {
offset = (slevel-1) >> 6;
slevel = 256 | (slevel & 63); // level 64 is treated as 0
}
if (run_level)
slevel |= 128;
put_bits(&ctx->m.pb, ctx->table_vlc_bits[slevel]+1, (ctx->table_vlc_codes[slevel]<<1)|(sign&1));
if (offset) {
put_bits(&ctx->m.pb, 4, offset);
offset = 0;
}
if (run_level)
put_bits(&ctx->m.pb, ctx->table_run_bits[run_level], ctx->table_run_codes[run_level]);
last_non_zero = i;
}
}
put_bits(&ctx->m.pb, ctx->table_vlc_bits[0], ctx->table_vlc_codes[0]); // EOB
}
static av_always_inline void dnxhd_unquantize_c(DNXHDEncContext *ctx, DCTELEM *block, int n, int qscale, int last_index)
{
const uint8_t *weight_matrix;
int level;
int i;
weight_matrix = (n&2) ? ctx->cid_table->chroma_weight : ctx->cid_table->luma_weight;
for (i = 1; i <= last_index; i++) {
int j = ctx->m.intra_scantable.permutated[i];
level = block[j];
if (level) {
if (level < 0) {
level = (1-2*level) * qscale * weight_matrix[i];
if (weight_matrix[i] != 32)
level += 32;
level >>= 6;
level = -level;
} else {
level = (2*level+1) * qscale * weight_matrix[i];
if (weight_matrix[i] != 32)
level += 32;
level >>= 6;
}
block[j] = level;
}
}
}
static av_always_inline int dnxhd_ssd_block(DCTELEM *qblock, DCTELEM *block)
{
int score = 0;
int i;
for (i = 0; i < 64; i++)
score += (block[i]-qblock[i])*(block[i]-qblock[i]);
return score;
}
static av_always_inline int dnxhd_calc_ac_bits(DNXHDEncContext *ctx, DCTELEM *block, int last_index)
{
int last_non_zero = 0;
int bits = 0;
int i, j, level;
for (i = 1; i <= last_index; i++) {
j = ctx->m.intra_scantable.permutated[i];
level = block[j];
if (level) {
int run_level = i - last_non_zero - 1;
level = FFABS(level);
if (level > 64) {
level = 256 | (level & 63); // level 64 is treated as 0
bits += 4;
}
level |= (!!run_level)<<7;
bits += ctx->table_vlc_bits[level]+1 + ctx->table_run_bits[run_level];
last_non_zero = i;
}
}
return bits;
}
static av_always_inline void dnxhd_get_pixels_4x8(DCTELEM *restrict block, const uint8_t *pixels, int line_size)
{
int i;
for (i = 0; i < 4; i++) {
block[0] = pixels[0];
block[1] = pixels[1];
block[2] = pixels[2];
block[3] = pixels[3];
block[4] = pixels[4];
block[5] = pixels[5];
block[6] = pixels[6];
block[7] = pixels[7];
pixels += line_size;
block += 8;
}
memcpy(block , block- 8, sizeof(*block)*8);
memcpy(block+ 8, block-16, sizeof(*block)*8);
memcpy(block+16, block-24, sizeof(*block)*8);
memcpy(block+24, block-32, sizeof(*block)*8);
}
static av_always_inline void dnxhd_get_blocks(DNXHDEncContext *ctx, int mb_x, int mb_y)
{
const uint8_t *ptr_y = ctx->thread[0]->src[0] + ((mb_y << 4) * ctx->m.linesize) + (mb_x << 4);
const uint8_t *ptr_u = ctx->thread[0]->src[1] + ((mb_y << 4) * ctx->m.uvlinesize) + (mb_x << 3);
const uint8_t *ptr_v = ctx->thread[0]->src[2] + ((mb_y << 4) * ctx->m.uvlinesize) + (mb_x << 3);
DSPContext *dsp = &ctx->m.dsp;
dsp->get_pixels(ctx->blocks[0], ptr_y , ctx->m.linesize);
dsp->get_pixels(ctx->blocks[1], ptr_y + 8, ctx->m.linesize);
dsp->get_pixels(ctx->blocks[2], ptr_u , ctx->m.uvlinesize);
dsp->get_pixels(ctx->blocks[3], ptr_v , ctx->m.uvlinesize);
if (mb_y+1 == ctx->m.mb_height && ctx->m.avctx->height == 1080) {
if (ctx->interlaced) {
dnxhd_get_pixels_4x8(ctx->blocks[4], ptr_y + ctx->dct_y_offset , ctx->m.linesize);
dnxhd_get_pixels_4x8(ctx->blocks[5], ptr_y + ctx->dct_y_offset + 8, ctx->m.linesize);
dnxhd_get_pixels_4x8(ctx->blocks[6], ptr_u + ctx->dct_uv_offset , ctx->m.uvlinesize);
dnxhd_get_pixels_4x8(ctx->blocks[7], ptr_v + ctx->dct_uv_offset , ctx->m.uvlinesize);
} else
memset(ctx->blocks[4], 0, 4*64*sizeof(DCTELEM));
} else {
dsp->get_pixels(ctx->blocks[4], ptr_y + ctx->dct_y_offset , ctx->m.linesize);
dsp->get_pixels(ctx->blocks[5], ptr_y + ctx->dct_y_offset + 8, ctx->m.linesize);
dsp->get_pixels(ctx->blocks[6], ptr_u + ctx->dct_uv_offset , ctx->m.uvlinesize);
dsp->get_pixels(ctx->blocks[7], ptr_v + ctx->dct_uv_offset , ctx->m.uvlinesize);
}
}
static av_always_inline int dnxhd_switch_matrix(DNXHDEncContext *ctx, int i)
{
if (i&2) {
ctx->m.q_intra_matrix16 = ctx->qmatrix_c16;
ctx->m.q_intra_matrix = ctx->qmatrix_c;
return 1 + (i&1);
} else {
ctx->m.q_intra_matrix16 = ctx->qmatrix_l16;
ctx->m.q_intra_matrix = ctx->qmatrix_l;
return 0;
}
}
static int dnxhd_calc_bits_thread(AVCodecContext *avctx, void *arg)
{
DNXHDEncContext *ctx = arg;
int mb_y, mb_x;
int qscale = ctx->thread[0]->qscale;
for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {
ctx->m.last_dc[0] =
ctx->m.last_dc[1] =
ctx->m.last_dc[2] = 1024;
for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
unsigned mb = mb_y * ctx->m.mb_width + mb_x;
int ssd = 0;
int ac_bits = 0;
int dc_bits = 0;
int i;
dnxhd_get_blocks(ctx, mb_x, mb_y);
for (i = 0; i < 8; i++) {
DECLARE_ALIGNED_16(DCTELEM, block[64]);
DCTELEM *src_block = ctx->blocks[i];
int overflow, nbits, diff, last_index;
int n = dnxhd_switch_matrix(ctx, i);
memcpy(block, src_block, sizeof(block));
last_index = ctx->m.dct_quantize((MpegEncContext*)ctx, block, i, qscale, &overflow);
ac_bits += dnxhd_calc_ac_bits(ctx, block, last_index);
diff = block[0] - ctx->m.last_dc[n];
if (diff < 0) nbits = av_log2_16bit(-2*diff);
else nbits = av_log2_16bit( 2*diff);
dc_bits += ctx->cid_table->dc_bits[nbits] + nbits;
ctx->m.last_dc[n] = block[0];
if (avctx->mb_decision == FF_MB_DECISION_RD || !RC_VARIANCE) {
dnxhd_unquantize_c(ctx, block, i, qscale, last_index);
ctx->m.dsp.idct(block);
ssd += dnxhd_ssd_block(block, src_block);
}
}
ctx->mb_rc[qscale][mb].ssd = ssd;
ctx->mb_rc[qscale][mb].bits = ac_bits+dc_bits+12+8*ctx->table_vlc_bits[0];
}
}
return 0;
}
static int dnxhd_encode_thread(AVCodecContext *avctx, void *arg)
{
DNXHDEncContext *ctx = arg;
int mb_y, mb_x;
for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {
ctx->m.last_dc[0] =
ctx->m.last_dc[1] =
ctx->m.last_dc[2] = 1024;
for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
unsigned mb = mb_y * ctx->m.mb_width + mb_x;
int qscale = ctx->mb_qscale[mb];
int i;
put_bits(&ctx->m.pb, 12, qscale<<1);
dnxhd_get_blocks(ctx, mb_x, mb_y);
for (i = 0; i < 8; i++) {
DCTELEM *block = ctx->blocks[i];
int last_index, overflow;
int n = dnxhd_switch_matrix(ctx, i);
last_index = ctx->m.dct_quantize((MpegEncContext*)ctx, block, i, qscale, &overflow);
dnxhd_encode_block(ctx, block, last_index, n);
}
}
if (put_bits_count(&ctx->m.pb)&31)
put_bits(&ctx->m.pb, 32-(put_bits_count(&ctx->m.pb)&31), 0);
}
flush_put_bits(&ctx->m.pb);
return 0;
}
static void dnxhd_setup_threads_slices(DNXHDEncContext *ctx, uint8_t *buf)
{
int mb_y, mb_x;
int i, offset = 0;
for (i = 0; i < ctx->m.avctx->thread_count; i++) {
int thread_size = 0;
for (mb_y = ctx->thread[i]->m.start_mb_y; mb_y < ctx->thread[i]->m.end_mb_y; mb_y++) {
ctx->slice_size[mb_y] = 0;
for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
unsigned mb = mb_y * ctx->m.mb_width + mb_x;
ctx->slice_size[mb_y] += ctx->mb_bits[mb];
}
ctx->slice_size[mb_y] = (ctx->slice_size[mb_y]+31)&~31;
ctx->slice_size[mb_y] >>= 3;
thread_size += ctx->slice_size[mb_y];
}
init_put_bits(&ctx->thread[i]->m.pb, buf + 640 + offset, thread_size);
offset += thread_size;
}
}
static int dnxhd_mb_var_thread(AVCodecContext *avctx, void *arg)
{
DNXHDEncContext *ctx = arg;
int mb_y, mb_x;
for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {
for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
unsigned mb = mb_y * ctx->m.mb_width + mb_x;
uint8_t *pix = ctx->thread[0]->src[0] + ((mb_y<<4) * ctx->m.linesize) + (mb_x<<4);
int sum = ctx->m.dsp.pix_sum(pix, ctx->m.linesize);
int varc = (ctx->m.dsp.pix_norm1(pix, ctx->m.linesize) - (((unsigned)(sum*sum))>>8)+128)>>8;
ctx->mb_cmp[mb].value = varc;
ctx->mb_cmp[mb].mb = mb;
}
}
return 0;
}
static int dnxhd_encode_rdo(AVCodecContext *avctx, DNXHDEncContext *ctx)
{
int lambda, up_step, down_step;
int last_lower = INT_MAX, last_higher = 0;
int x, y, q;
for (q = 1; q < avctx->qmax; q++) {
ctx->qscale = q;
avctx->execute(avctx, dnxhd_calc_bits_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count);
}
up_step = down_step = 2<<LAMBDA_FRAC_BITS;
lambda = ctx->lambda;
for (;;) {
int bits = 0;
int end = 0;
if (lambda == last_higher) {
lambda++;
end = 1; // need to set final qscales/bits
}
for (y = 0; y < ctx->m.mb_height; y++) {
for (x = 0; x < ctx->m.mb_width; x++) {
unsigned min = UINT_MAX;
int qscale = 1;
int mb = y*ctx->m.mb_width+x;
for (q = 1; q < avctx->qmax; q++) {
unsigned score = ctx->mb_rc[q][mb].bits*lambda+(ctx->mb_rc[q][mb].ssd<<LAMBDA_FRAC_BITS);
if (score < min) {
min = score;
qscale = q;
}
}
bits += ctx->mb_rc[qscale][mb].bits;
ctx->mb_qscale[mb] = qscale;
ctx->mb_bits[mb] = ctx->mb_rc[qscale][mb].bits;
}
bits = (bits+31)&~31; // padding
if (bits > ctx->frame_bits)
break;
}
//dprintf(ctx->m.avctx, "lambda %d, up %u, down %u, bits %d, frame %d\n",
// lambda, last_higher, last_lower, bits, ctx->frame_bits);
if (end) {
if (bits > ctx->frame_bits)
return -1;
break;
}
if (bits < ctx->frame_bits) {
last_lower = FFMIN(lambda, last_lower);
if (last_higher != 0)
lambda = (lambda+last_higher)>>1;
else
lambda -= down_step;
down_step *= 5; // XXX tune ?
up_step = 1<<LAMBDA_FRAC_BITS;
lambda = FFMAX(1, lambda);
if (lambda == last_lower)
break;
} else {
last_higher = FFMAX(lambda, last_higher);
if (last_lower != INT_MAX)
lambda = (lambda+last_lower)>>1;
else
lambda += up_step;
up_step *= 5;
down_step = 1<<LAMBDA_FRAC_BITS;
}
}
//dprintf(ctx->m.avctx, "out lambda %d\n", lambda);
ctx->lambda = lambda;
return 0;
}
static int dnxhd_find_qscale(DNXHDEncContext *ctx)
{
int bits = 0;
int up_step = 1;
int down_step = 1;
int last_higher = 0;
int last_lower = INT_MAX;
int qscale;
int x, y;
qscale = ctx->qscale;
for (;;) {
bits = 0;
ctx->qscale = qscale;
// XXX avoid recalculating bits
ctx->m.avctx->execute(ctx->m.avctx, dnxhd_calc_bits_thread, (void**)&ctx->thread[0], NULL, ctx->m.avctx->thread_count);
for (y = 0; y < ctx->m.mb_height; y++) {
for (x = 0; x < ctx->m.mb_width; x++)
bits += ctx->mb_rc[qscale][y*ctx->m.mb_width+x].bits;
bits = (bits+31)&~31; // padding
if (bits > ctx->frame_bits)
break;
}
//dprintf(ctx->m.avctx, "%d, qscale %d, bits %d, frame %d, higher %d, lower %d\n",
// ctx->m.avctx->frame_number, qscale, bits, ctx->frame_bits, last_higher, last_lower);
if (bits < ctx->frame_bits) {
if (qscale == 1)
return 1;
if (last_higher == qscale - 1) {
qscale = last_higher;
break;
}
last_lower = FFMIN(qscale, last_lower);
if (last_higher != 0)
qscale = (qscale+last_higher)>>1;
else
qscale -= down_step++;
if (qscale < 1)
qscale = 1;
up_step = 1;
} else {
if (last_lower == qscale + 1)
break;
last_higher = FFMAX(qscale, last_higher);
if (last_lower != INT_MAX)
qscale = (qscale+last_lower)>>1;
else
qscale += up_step++;
down_step = 1;
if (qscale >= ctx->m.avctx->qmax)
return -1;
}
}
//dprintf(ctx->m.avctx, "out qscale %d\n", qscale);
ctx->qscale = qscale;
return 0;
}
static int dnxhd_rc_cmp(const void *a, const void *b)
{
return ((const RCCMPEntry *)b)->value - ((const RCCMPEntry *)a)->value;
}
static int dnxhd_encode_fast(AVCodecContext *avctx, DNXHDEncContext *ctx)
{
int max_bits = 0;
int ret, x, y;
if ((ret = dnxhd_find_qscale(ctx)) < 0)
return -1;
for (y = 0; y < ctx->m.mb_height; y++) {
for (x = 0; x < ctx->m.mb_width; x++) {
int mb = y*ctx->m.mb_width+x;
int delta_bits;
ctx->mb_qscale[mb] = ctx->qscale;
ctx->mb_bits[mb] = ctx->mb_rc[ctx->qscale][mb].bits;
max_bits += ctx->mb_rc[ctx->qscale][mb].bits;
if (!RC_VARIANCE) {
delta_bits = ctx->mb_rc[ctx->qscale][mb].bits-ctx->mb_rc[ctx->qscale+1][mb].bits;
ctx->mb_cmp[mb].mb = mb;
ctx->mb_cmp[mb].value = delta_bits ?
((ctx->mb_rc[ctx->qscale][mb].ssd-ctx->mb_rc[ctx->qscale+1][mb].ssd)*100)/delta_bits
: INT_MIN; //avoid increasing qscale
}
}
max_bits += 31; //worst padding
}
if (!ret) {
if (RC_VARIANCE)
avctx->execute(avctx, dnxhd_mb_var_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count);
qsort(ctx->mb_cmp, ctx->m.mb_num, sizeof(RCEntry), dnxhd_rc_cmp);
for (x = 0; x < ctx->m.mb_num && max_bits > ctx->frame_bits; x++) {
int mb = ctx->mb_cmp[x].mb;
max_bits -= ctx->mb_rc[ctx->qscale][mb].bits - ctx->mb_rc[ctx->qscale+1][mb].bits;
ctx->mb_qscale[mb] = ctx->qscale+1;
ctx->mb_bits[mb] = ctx->mb_rc[ctx->qscale+1][mb].bits;
}
}
return 0;
}
static void dnxhd_load_picture(DNXHDEncContext *ctx, const AVFrame *frame)
{
int i;
for (i = 0; i < 3; i++) {
ctx->frame.data[i] = frame->data[i];
ctx->frame.linesize[i] = frame->linesize[i];
}
for (i = 0; i < ctx->m.avctx->thread_count; i++) {
ctx->thread[i]->m.linesize = ctx->frame.linesize[0]<<ctx->interlaced;
ctx->thread[i]->m.uvlinesize = ctx->frame.linesize[1]<<ctx->interlaced;
ctx->thread[i]->dct_y_offset = ctx->m.linesize *8;
ctx->thread[i]->dct_uv_offset = ctx->m.uvlinesize*8;
}
ctx->frame.interlaced_frame = frame->interlaced_frame;
ctx->cur_field = frame->interlaced_frame && !frame->top_field_first;
}
static int dnxhd_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, const void *data)
{
DNXHDEncContext *ctx = avctx->priv_data;
int first_field = 1;
int offset, i, ret;
if (buf_size < ctx->cid_table->frame_size) {
av_log(avctx, AV_LOG_ERROR, "output buffer is too small to compress picture\n");
return -1;
}
dnxhd_load_picture(ctx, data);
encode_coding_unit:
for (i = 0; i < 3; i++) {
ctx->src[i] = ctx->frame.data[i];
if (ctx->interlaced && ctx->cur_field)
ctx->src[i] += ctx->frame.linesize[i];
}
dnxhd_write_header(avctx, buf);
if (avctx->mb_decision == FF_MB_DECISION_RD)
ret = dnxhd_encode_rdo(avctx, ctx);
else
ret = dnxhd_encode_fast(avctx, ctx);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "picture could not fit ratecontrol constraints\n");
return -1;
}
dnxhd_setup_threads_slices(ctx, buf);
offset = 0;
for (i = 0; i < ctx->m.mb_height; i++) {
AV_WB32(ctx->msip + i * 4, offset);
offset += ctx->slice_size[i];
assert(!(ctx->slice_size[i] & 3));
}
avctx->execute(avctx, dnxhd_encode_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count);
AV_WB32(buf + ctx->cid_table->coding_unit_size - 4, 0x600DC0DE); // EOF
if (ctx->interlaced && first_field) {
first_field = 0;
ctx->cur_field ^= 1;
buf += ctx->cid_table->coding_unit_size;
buf_size -= ctx->cid_table->coding_unit_size;
goto encode_coding_unit;
}
ctx->frame.quality = ctx->qscale*FF_QP2LAMBDA;
return ctx->cid_table->frame_size;
}
static int dnxhd_encode_end(AVCodecContext *avctx)
{
DNXHDEncContext *ctx = avctx->priv_data;
int i;
av_freep(&ctx->table_vlc_codes);
av_freep(&ctx->table_vlc_bits);
av_freep(&ctx->table_run_codes);
av_freep(&ctx->table_run_bits);
av_freep(&ctx->mb_bits);
av_freep(&ctx->mb_qscale);
av_freep(&ctx->mb_rc);
av_freep(&ctx->mb_cmp);
av_freep(&ctx->slice_size);
av_freep(&ctx->qmatrix_c);
av_freep(&ctx->qmatrix_l);
av_freep(&ctx->qmatrix_c16);
av_freep(&ctx->qmatrix_l16);
for (i = 1; i < avctx->thread_count; i++)
av_freep(&ctx->thread[i]);
return 0;
}
AVCodec dnxhd_encoder = {
"dnxhd",
CODEC_TYPE_VIDEO,
CODEC_ID_DNXHD,
sizeof(DNXHDEncContext),
dnxhd_encode_init,
dnxhd_encode_picture,
dnxhd_encode_end,
.pix_fmts = (enum PixelFormat[]){PIX_FMT_YUV422P, PIX_FMT_NONE},
.long_name = "VC3/DNxHD",
};
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