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third_party_ffmpeg/libavcodec/huffyuvenc.c

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/*
* Copyright (c) 2002-2003 Michael Niedermayer <michaelni@gmx.at>
*
* see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
* the algorithm used
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* huffyuv encoder
*/
#include "avcodec.h"
#include "huffyuv.h"
#include "huffman.h"
#include "put_bits.h"
static inline int sub_left_prediction(HYuvContext *s, uint8_t *dst,
uint8_t *src, int w, int left)
{
int i;
if (w < 32) {
for (i = 0; i < w; i++) {
const int temp = src[i];
dst[i] = temp - left;
left = temp;
}
return left;
} else {
for (i = 0; i < 16; i++) {
const int temp = src[i];
dst[i] = temp - left;
left = temp;
}
s->dsp.diff_bytes(dst + 16, src + 16, src + 15, w - 16);
return src[w-1];
}
}
static inline void sub_left_prediction_bgr32(HYuvContext *s, uint8_t *dst,
uint8_t *src, int w,
int *red, int *green, int *blue)
{
int i;
int r,g,b;
r = *red;
g = *green;
b = *blue;
for (i = 0; i < FFMIN(w, 4); i++) {
const int rt = src[i * 4 + R];
const int gt = src[i * 4 + G];
const int bt = src[i * 4 + B];
dst[i * 4 + R] = rt - r;
dst[i * 4 + G] = gt - g;
dst[i * 4 + B] = bt - b;
r = rt;
g = gt;
b = bt;
}
s->dsp.diff_bytes(dst + 16, src + 16, src + 12, w * 4 - 16);
*red = src[(w - 1) * 4 + R];
*green = src[(w - 1) * 4 + G];
*blue = src[(w - 1) * 4 + B];
}
static int store_table(HYuvContext *s, const uint8_t *len, uint8_t *buf)
{
int i;
int index = 0;
for (i = 0; i < 256;) {
int val = len[i];
int repeat = 0;
for (; i < 256 && len[i] == val && repeat < 255; i++)
repeat++;
assert(val < 32 && val >0 && repeat<256 && repeat>0);
if ( repeat > 7) {
buf[index++] = val;
buf[index++] = repeat;
} else {
buf[index++] = val | (repeat << 5);
}
}
return index;
}
static av_cold int encode_init(AVCodecContext *avctx)
{
HYuvContext *s = avctx->priv_data;
int i, j;
ff_huffyuv_common_init(avctx);
avctx->extradata = av_mallocz(1024*30); // 256*3+4 == 772
avctx->stats_out = av_mallocz(1024*30); // 21*256*3(%llu ) + 3(\n) + 1(0) = 16132
s->version = 2;
avctx->coded_frame = &s->picture;
switch (avctx->pix_fmt) {
case AV_PIX_FMT_YUV420P:
s->bitstream_bpp = 12;
break;
case AV_PIX_FMT_YUV422P:
s->bitstream_bpp = 16;
break;
case AV_PIX_FMT_RGB32:
s->bitstream_bpp = 24;
break;
default:
av_log(avctx, AV_LOG_ERROR, "format not supported\n");
return -1;
}
avctx->bits_per_coded_sample = s->bitstream_bpp;
s->decorrelate = s->bitstream_bpp >= 24;
s->predictor = avctx->prediction_method;
s->interlaced = avctx->flags&CODEC_FLAG_INTERLACED_ME ? 1 : 0;
if (avctx->context_model == 1) {
s->context = avctx->context_model;
if (s->flags & (CODEC_FLAG_PASS1|CODEC_FLAG_PASS2)) {
av_log(avctx, AV_LOG_ERROR,
"context=1 is not compatible with "
"2 pass huffyuv encoding\n");
return -1;
}
}else s->context= 0;
if (avctx->codec->id == AV_CODEC_ID_HUFFYUV) {
if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
av_log(avctx, AV_LOG_ERROR,
"Error: YV12 is not supported by huffyuv; use "
"vcodec=ffvhuff or format=422p\n");
return -1;
}
if (avctx->context_model) {
av_log(avctx, AV_LOG_ERROR,
"Error: per-frame huffman tables are not supported "
"by huffyuv; use vcodec=ffvhuff\n");
return -1;
}
if (s->interlaced != ( s->height > 288 ))
av_log(avctx, AV_LOG_INFO,
"using huffyuv 2.2.0 or newer interlacing flag\n");
}
if (s->bitstream_bpp >= 24 && s->predictor == MEDIAN) {
av_log(avctx, AV_LOG_ERROR,
"Error: RGB is incompatible with median predictor\n");
return -1;
}
((uint8_t*)avctx->extradata)[0] = s->predictor | (s->decorrelate << 6);
((uint8_t*)avctx->extradata)[1] = s->bitstream_bpp;
((uint8_t*)avctx->extradata)[2] = s->interlaced ? 0x10 : 0x20;
if (s->context)
((uint8_t*)avctx->extradata)[2] |= 0x40;
((uint8_t*)avctx->extradata)[3] = 0;
s->avctx->extradata_size = 4;
if (avctx->stats_in) {
char *p = avctx->stats_in;
for (i = 0; i < 3; i++)
for (j = 0; j < 256; j++)
s->stats[i][j] = 1;
for (;;) {
for (i = 0; i < 3; i++) {
char *next;
for (j = 0; j < 256; j++) {
s->stats[i][j] += strtol(p, &next, 0);
if (next == p) return -1;
p = next;
}
}
if (p[0] == 0 || p[1] == 0 || p[2] == 0) break;
}
} else {
for (i = 0; i < 3; i++)
for (j = 0; j < 256; j++) {
int d = FFMIN(j, 256 - j);
s->stats[i][j] = 100000000 / (d + 1);
}
}
for (i = 0; i < 3; i++) {
ff_huff_gen_len_table(s->len[i], s->stats[i]);
if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i]) < 0) {
return -1;
}
s->avctx->extradata_size +=
store_table(s, s->len[i], &((uint8_t*)s->avctx->extradata)[s->avctx->extradata_size]);
}
if (s->context) {
for (i = 0; i < 3; i++) {
int pels = s->width * s->height / (i ? 40 : 10);
for (j = 0; j < 256; j++) {
int d = FFMIN(j, 256 - j);
s->stats[i][j] = pels/(d + 1);
}
}
} else {
for (i = 0; i < 3; i++)
for (j = 0; j < 256; j++)
s->stats[i][j]= 0;
}
ff_huffyuv_alloc_temp(s);
s->picture_number=0;
return 0;
}
static int encode_422_bitstream(HYuvContext *s, int offset, int count)
{
int i;
const uint8_t *y = s->temp[0] + offset;
const uint8_t *u = s->temp[1] + offset / 2;
const uint8_t *v = s->temp[2] + offset / 2;
if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < 2 * 4 * count) {
av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}
#define LOAD4\
int y0 = y[2 * i];\
int y1 = y[2 * i + 1];\
int u0 = u[i];\
int v0 = v[i];
count /= 2;
if (s->flags & CODEC_FLAG_PASS1) {
for(i = 0; i < count; i++) {
LOAD4;
s->stats[0][y0]++;
s->stats[1][u0]++;
s->stats[0][y1]++;
s->stats[2][v0]++;
}
}
if (s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)
return 0;
if (s->context) {
for (i = 0; i < count; i++) {
LOAD4;
s->stats[0][y0]++;
put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);
s->stats[1][u0]++;
put_bits(&s->pb, s->len[1][u0], s->bits[1][u0]);
s->stats[0][y1]++;
put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);
s->stats[2][v0]++;
put_bits(&s->pb, s->len[2][v0], s->bits[2][v0]);
}
} else {
for(i = 0; i < count; i++) {
LOAD4;
put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);
put_bits(&s->pb, s->len[1][u0], s->bits[1][u0]);
put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);
put_bits(&s->pb, s->len[2][v0], s->bits[2][v0]);
}
}
return 0;
}
static int encode_gray_bitstream(HYuvContext *s, int count)
{
int i;
if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < 4 * count) {
av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}
#define LOAD2\
int y0 = s->temp[0][2 * i];\
int y1 = s->temp[0][2 * i + 1];
#define STAT2\
s->stats[0][y0]++;\
s->stats[0][y1]++;
#define WRITE2\
put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);\
put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);
count /= 2;
if (s->flags & CODEC_FLAG_PASS1) {
for (i = 0; i < count; i++) {
LOAD2;
STAT2;
}
}
if (s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)
return 0;
if (s->context) {
for (i = 0; i < count; i++) {
LOAD2;
STAT2;
WRITE2;
}
} else {
for (i = 0; i < count; i++) {
LOAD2;
WRITE2;
}
}
return 0;
}
static int encode_bgr_bitstream(HYuvContext *s, int count)
{
int i;
if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < 3 * 4 * count) {
av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}
#define LOAD3\
int g = s->temp[0][4 * i + G];\
int b = (s->temp[0][4 * i + B] - g) & 0xff;\
int r = (s->temp[0][4 * i + R] - g) & 0xff;
#define STAT3\
s->stats[0][b]++;\
s->stats[1][g]++;\
s->stats[2][r]++;
#define WRITE3\
put_bits(&s->pb, s->len[1][g], s->bits[1][g]);\
put_bits(&s->pb, s->len[0][b], s->bits[0][b]);\
put_bits(&s->pb, s->len[2][r], s->bits[2][r]);
if ((s->flags & CODEC_FLAG_PASS1) &&
(s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)) {
for (i = 0; i < count; i++) {
LOAD3;
STAT3;
}
} else if (s->context || (s->flags & CODEC_FLAG_PASS1)) {
for (i = 0; i < count; i++) {
LOAD3;
STAT3;
WRITE3;
}
} else {
for (i = 0; i < count; i++) {
LOAD3;
WRITE3;
}
}
return 0;
}
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *pict, int *got_packet)
{
HYuvContext *s = avctx->priv_data;
const int width = s->width;
const int width2 = s->width>>1;
const int height = s->height;
const int fake_ystride = s->interlaced ? pict->linesize[0]*2 : pict->linesize[0];
const int fake_ustride = s->interlaced ? pict->linesize[1]*2 : pict->linesize[1];
const int fake_vstride = s->interlaced ? pict->linesize[2]*2 : pict->linesize[2];
AVFrame * const p = &s->picture;
int i, j, size = 0, ret;
if (!pkt->data &&
(ret = av_new_packet(pkt, width * height * 3 * 4 + FF_MIN_BUFFER_SIZE)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Error allocating output packet.\n");
return ret;
}
*p = *pict;
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
if (s->context) {
for (i = 0; i < 3; i++) {
ff_huff_gen_len_table(s->len[i], s->stats[i]);
if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i]) < 0)
return -1;
size += store_table(s, s->len[i], &pkt->data[size]);
}
for (i = 0; i < 3; i++)
for (j = 0; j < 256; j++)
s->stats[i][j] >>= 1;
}
init_put_bits(&s->pb, pkt->data + size, pkt->size - size);
if (avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
int lefty, leftu, leftv, y, cy;
put_bits(&s->pb, 8, leftv = p->data[2][0]);
put_bits(&s->pb, 8, lefty = p->data[0][1]);
put_bits(&s->pb, 8, leftu = p->data[1][0]);
put_bits(&s->pb, 8, p->data[0][0]);
lefty = sub_left_prediction(s, s->temp[0], p->data[0], width , 0);
leftu = sub_left_prediction(s, s->temp[1], p->data[1], width2, 0);
leftv = sub_left_prediction(s, s->temp[2], p->data[2], width2, 0);
encode_422_bitstream(s, 2, width-2);
if (s->predictor==MEDIAN) {
int lefttopy, lefttopu, lefttopv;
cy = y = 1;
if (s->interlaced) {
lefty = sub_left_prediction(s, s->temp[0], p->data[0] + p->linesize[0], width , lefty);
leftu = sub_left_prediction(s, s->temp[1], p->data[1] + p->linesize[1], width2, leftu);
leftv = sub_left_prediction(s, s->temp[2], p->data[2] + p->linesize[2], width2, leftv);
encode_422_bitstream(s, 0, width);
y++; cy++;
}
lefty = sub_left_prediction(s, s->temp[0], p->data[0] + fake_ystride, 4, lefty);
leftu = sub_left_prediction(s, s->temp[1], p->data[1] + fake_ustride, 2, leftu);
leftv = sub_left_prediction(s, s->temp[2], p->data[2] + fake_vstride, 2, leftv);
encode_422_bitstream(s, 0, 4);
lefttopy = p->data[0][3];
lefttopu = p->data[1][1];
lefttopv = p->data[2][1];
s->dsp.sub_hfyu_median_prediction(s->temp[0], p->data[0]+4, p->data[0] + fake_ystride + 4, width - 4 , &lefty, &lefttopy);
s->dsp.sub_hfyu_median_prediction(s->temp[1], p->data[1]+2, p->data[1] + fake_ustride + 2, width2 - 2, &leftu, &lefttopu);
s->dsp.sub_hfyu_median_prediction(s->temp[2], p->data[2]+2, p->data[2] + fake_vstride + 2, width2 - 2, &leftv, &lefttopv);
encode_422_bitstream(s, 0, width - 4);
y++; cy++;
for (; y < height; y++,cy++) {
uint8_t *ydst, *udst, *vdst;
if (s->bitstream_bpp == 12) {
while (2 * cy > y) {
ydst = p->data[0] + p->linesize[0] * y;
s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);
encode_gray_bitstream(s, width);
y++;
}
if (y >= height) break;
}
ydst = p->data[0] + p->linesize[0] * y;
udst = p->data[1] + p->linesize[1] * cy;
vdst = p->data[2] + p->linesize[2] * cy;
s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);
s->dsp.sub_hfyu_median_prediction(s->temp[1], udst - fake_ustride, udst, width2, &leftu, &lefttopu);
s->dsp.sub_hfyu_median_prediction(s->temp[2], vdst - fake_vstride, vdst, width2, &leftv, &lefttopv);
encode_422_bitstream(s, 0, width);
}
} else {
for (cy = y = 1; y < height; y++, cy++) {
uint8_t *ydst, *udst, *vdst;
/* encode a luma only line & y++ */
if (s->bitstream_bpp == 12) {
ydst = p->data[0] + p->linesize[0] * y;
if (s->predictor == PLANE && s->interlaced < y) {
s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);
lefty = sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);
} else {
lefty = sub_left_prediction(s, s->temp[0], ydst, width , lefty);
}
encode_gray_bitstream(s, width);
y++;
if (y >= height) break;
}
ydst = p->data[0] + p->linesize[0] * y;
udst = p->data[1] + p->linesize[1] * cy;
vdst = p->data[2] + p->linesize[2] * cy;
if (s->predictor == PLANE && s->interlaced < cy) {
s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);
s->dsp.diff_bytes(s->temp[2], udst, udst - fake_ustride, width2);
s->dsp.diff_bytes(s->temp[2] + width2, vdst, vdst - fake_vstride, width2);
lefty = sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);
leftu = sub_left_prediction(s, s->temp[1], s->temp[2], width2, leftu);
leftv = sub_left_prediction(s, s->temp[2], s->temp[2] + width2, width2, leftv);
} else {
lefty = sub_left_prediction(s, s->temp[0], ydst, width , lefty);
leftu = sub_left_prediction(s, s->temp[1], udst, width2, leftu);
leftv = sub_left_prediction(s, s->temp[2], vdst, width2, leftv);
}
encode_422_bitstream(s, 0, width);
}
}
} else if(avctx->pix_fmt == AV_PIX_FMT_RGB32) {
uint8_t *data = p->data[0] + (height - 1) * p->linesize[0];
const int stride = -p->linesize[0];
const int fake_stride = -fake_ystride;
int y;
int leftr, leftg, leftb;
put_bits(&s->pb, 8, leftr = data[R]);
put_bits(&s->pb, 8, leftg = data[G]);
put_bits(&s->pb, 8, leftb = data[B]);
put_bits(&s->pb, 8, 0);
sub_left_prediction_bgr32(s, s->temp[0], data + 4, width - 1, &leftr, &leftg, &leftb);
encode_bgr_bitstream(s, width - 1);
for (y = 1; y < s->height; y++) {
uint8_t *dst = data + y*stride;
if (s->predictor == PLANE && s->interlaced < y) {
s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width * 4);
sub_left_prediction_bgr32(s, s->temp[0], s->temp[1], width, &leftr, &leftg, &leftb);
} else {
sub_left_prediction_bgr32(s, s->temp[0], dst, width, &leftr, &leftg, &leftb);
}
encode_bgr_bitstream(s, width);
}
} else {
av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");
}
emms_c();
size += (put_bits_count(&s->pb) + 31) / 8;
put_bits(&s->pb, 16, 0);
put_bits(&s->pb, 15, 0);
size /= 4;
if ((s->flags&CODEC_FLAG_PASS1) && (s->picture_number & 31) == 0) {
int j;
char *p = avctx->stats_out;
char *end = p + 1024*30;
for (i = 0; i < 3; i++) {
for (j = 0; j < 256; j++) {
snprintf(p, end-p, "%"PRIu64" ", s->stats[i][j]);
p += strlen(p);
s->stats[i][j]= 0;
}
snprintf(p, end-p, "\n");
p++;
}
} else
avctx->stats_out[0] = '\0';
if (!(s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)) {
flush_put_bits(&s->pb);
s->dsp.bswap_buf((uint32_t*)pkt->data, (uint32_t*)pkt->data, size);
}
s->picture_number++;
pkt->size = size * 4;
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
static av_cold int encode_end(AVCodecContext *avctx)
{
HYuvContext *s = avctx->priv_data;
ff_huffyuv_common_end(s);
av_freep(&avctx->extradata);
av_freep(&avctx->stats_out);
return 0;
}
#if CONFIG_HUFFYUV_ENCODER
AVCodec ff_huffyuv_encoder = {
.name = "huffyuv",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HUFFYUV,
.priv_data_size = sizeof(HYuvContext),
.init = encode_init,
.encode2 = encode_frame,
.close = encode_end,
.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_YUV422P, AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
},
.long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
};
#endif
#if CONFIG_FFVHUFF_ENCODER
AVCodec ff_ffvhuff_encoder = {
.name = "ffvhuff",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_FFVHUFF,
.priv_data_size = sizeof(HYuvContext),
.init = encode_init,
.encode2 = encode_frame,
.close = encode_end,
.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
},
.long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
};
#endif
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