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ffmpeg/libavcodec/proresenc.c
Michael Niedermayer 16b771b1f4 cleanup: for(int 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2011-12-13 21:08:43 +01:00

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/*
* Apple ProRes encoder
*
* Copyright (c) 2011 Anatoliy Wasserman
*
* 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
*/
/**
* @file libavcodec/proresenc.c
* Known FOURCCs: 'apch' (HQ), 'apcn' (SD), 'apcs' (LT), 'acpo' (Proxy)
*/
#include "avcodec.h"
#include "put_bits.h"
#include "bytestream.h"
#include "dsputil.h"
#define DEFAULT_SLICE_MB_WIDTH 8
#define FF_PROFILE_PRORES_PROXY 0
#define FF_PROFILE_PRORES_LT 1
#define FF_PROFILE_PRORES_STANDARD 2
#define FF_PROFILE_PRORES_HQ 3
static const AVProfile profiles[] = {
{ FF_PROFILE_PRORES_PROXY, "apco"},
{ FF_PROFILE_PRORES_LT, "apcs"},
{ FF_PROFILE_PRORES_STANDARD, "apcn"},
{ FF_PROFILE_PRORES_HQ, "apch"},
{ FF_PROFILE_UNKNOWN }
};
static const int qp_start_table[4] = { 4, 1, 1, 1 };
static const int qp_end_table[4] = { 8, 9, 6, 6 };
static const int bitrate_table[5] = { 1000, 2100, 3500, 5400 };
static const uint8_t progressive_scan[64] = {
0, 1, 8, 9, 2, 3, 10, 11,
16, 17, 24, 25, 18, 19, 26, 27,
4, 5, 12, 20, 13, 6, 7, 14,
21, 28, 29, 22, 15, 23, 30, 31,
32, 33, 40, 48, 41, 34, 35, 42,
49, 56, 57, 50, 43, 36, 37, 44,
51, 58, 59, 52, 45, 38, 39, 46,
53, 60, 61, 54, 47, 55, 62, 63
};
static const uint8_t QMAT_LUMA[4][64] = {
{
4, 7, 9, 11, 13, 14, 15, 63,
7, 7, 11, 12, 14, 15, 63, 63,
9, 11, 13, 14, 15, 63, 63, 63,
11, 11, 13, 14, 63, 63, 63, 63,
11, 13, 14, 63, 63, 63, 63, 63,
13, 14, 63, 63, 63, 63, 63, 63,
13, 63, 63, 63, 63, 63, 63, 63,
63, 63, 63, 63, 63, 63, 63, 63
}, {
4, 5, 6, 7, 9, 11, 13, 15,
5, 5, 7, 8, 11, 13, 15, 17,
6, 7, 9, 11, 13, 15, 15, 17,
7, 7, 9, 11, 13, 15, 17, 19,
7, 9, 11, 13, 14, 16, 19, 23,
9, 11, 13, 14, 16, 19, 23, 29,
9, 11, 13, 15, 17, 21, 28, 35,
11, 13, 16, 17, 21, 28, 35, 41
}, {
4, 4, 5, 5, 6, 7, 7, 9,
4, 4, 5, 6, 7, 7, 9, 9,
5, 5, 6, 7, 7, 9, 9, 10,
5, 5, 6, 7, 7, 9, 9, 10,
5, 6, 7, 7, 8, 9, 10, 12,
6, 7, 7, 8, 9, 10, 12, 15,
6, 7, 7, 9, 10, 11, 14, 17,
7, 7, 9, 10, 11, 14, 17, 21
}, {
4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 5,
4, 4, 4, 4, 4, 4, 5, 5,
4, 4, 4, 4, 4, 5, 5, 6,
4, 4, 4, 4, 5, 5, 6, 7,
4, 4, 4, 4, 5, 6, 7, 7
}
};
static const uint8_t QMAT_CHROMA[4][64] = {
{
4, 7, 9, 11, 13, 14, 63, 63,
7, 7, 11, 12, 14, 63, 63, 63,
9, 11, 13, 14, 63, 63, 63, 63,
11, 11, 13, 14, 63, 63, 63, 63,
11, 13, 14, 63, 63, 63, 63, 63,
13, 14, 63, 63, 63, 63, 63, 63,
13, 63, 63, 63, 63, 63, 63, 63,
63, 63, 63, 63, 63, 63, 63, 63
}, {
4, 5, 6, 7, 9, 11, 13, 15,
5, 5, 7, 8, 11, 13, 15, 17,
6, 7, 9, 11, 13, 15, 15, 17,
7, 7, 9, 11, 13, 15, 17, 19,
7, 9, 11, 13, 14, 16, 19, 23,
9, 11, 13, 14, 16, 19, 23, 29,
9, 11, 13, 15, 17, 21, 28, 35,
11, 13, 16, 17, 21, 28, 35, 41
}, {
4, 4, 5, 5, 6, 7, 7, 9,
4, 4, 5, 6, 7, 7, 9, 9,
5, 5, 6, 7, 7, 9, 9, 10,
5, 5, 6, 7, 7, 9, 9, 10,
5, 6, 7, 7, 8, 9, 10, 12,
6, 7, 7, 8, 9, 10, 12, 15,
6, 7, 7, 9, 10, 11, 14, 17,
7, 7, 9, 10, 11, 14, 17, 21
}, {
4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 5,
4, 4, 4, 4, 4, 4, 5, 5,
4, 4, 4, 4, 4, 5, 5, 6,
4, 4, 4, 4, 5, 5, 6, 7,
4, 4, 4, 4, 5, 6, 7, 7
}
};
typedef struct {
uint8_t* fill_y;
uint8_t* fill_u;
uint8_t* fill_v;
int qmat_luma[16][64];
int qmat_chroma[16][64];
} ProresContext;
static void encode_codeword(PutBitContext *pb, int val, int codebook)
{
unsigned int rice_order, exp_order, switch_bits, first_exp, exp, zeros,
mask;
/* number of bits to switch between rice and exp golomb */
switch_bits = codebook & 3;
rice_order = codebook >> 5;
exp_order = (codebook >> 2) & 7;
first_exp = ((switch_bits + 1) << rice_order);
if (val >= first_exp) { /* exp golomb */
val -= first_exp;
val += (1 << exp_order);
exp = av_log2(val);
zeros = exp - exp_order + switch_bits + 1;
put_bits(pb, zeros, 0);
put_bits(pb, 1, 1);
put_bits(pb, exp, val);
} else if (rice_order) {
mask = (1 << rice_order) - 1;
put_bits(pb, (val >> rice_order), 0);
put_bits(pb, 1, 1);
put_bits(pb, rice_order, val & mask);
} else {
put_bits(pb, val, 0);
put_bits(pb, 1, 1);
}
}
#define QSCALE(qmat,ind,val) ((val) / (qmat[ind]))
#define TO_GOLOMB(val) ((val << 1) ^ (val >> 31))
#define DIFF_SIGN(val, sign) ((val >> 31) ^ sign)
#define IS_NEGATIVE(val) (((val >> 31) ^ -1) + 1)
#define TO_GOLOMB2(val,sign) (val==0 ? 0 : (val << 1) + sign)
static av_always_inline int get_level(int val)
{
int sign = (val >> 31);
return (val ^ sign) - sign;
}
#define FIRST_DC_CB 0xB8
static const uint8_t dc_codebook[7] = { 0x04, 0x28, 0x28, 0x4D, 0x4D, 0x70, 0x70};
static void encode_dc_coeffs(PutBitContext *pb, DCTELEM *in,
int blocks_per_slice, int *qmat)
{
int prev_dc, code;
int i, sign, idx;
int new_dc, delta, diff_sign, new_code;
prev_dc = QSCALE(qmat, 0, in[0] - 16384);
code = TO_GOLOMB(prev_dc);
encode_codeword(pb, code, FIRST_DC_CB);
code = 5; sign = 0; idx = 64;
for (i = 1; i < blocks_per_slice; i++, idx += 64) {
new_dc = QSCALE(qmat, 0, in[idx] - 16384);
delta = new_dc - prev_dc;
diff_sign = DIFF_SIGN(delta, sign);
new_code = TO_GOLOMB2(get_level(delta), diff_sign);
encode_codeword(pb, new_code, dc_codebook[FFMIN(code, 6)]);
code = new_code;
sign = delta >> 31;
prev_dc = new_dc;
}
}
static const uint8_t run_to_cb[16] = { 0x06, 0x06, 0x05, 0x05, 0x04, 0x29,
0x29, 0x29, 0x29, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x4C };
static const uint8_t lev_to_cb[10] = { 0x04, 0x0A, 0x05, 0x06, 0x04, 0x28,
0x28, 0x28, 0x28, 0x4C };
static void encode_ac_coeffs(AVCodecContext *avctx, PutBitContext *pb,
DCTELEM *in, int blocks_per_slice, int *qmat)
{
int prev_run = 4;
int prev_level = 2;
int run = 0, level, code, i, j;
for (i = 1; i < 64; i++) {
int indp = progressive_scan[i];
for (j = 0; j < blocks_per_slice; j++) {
int val = QSCALE(qmat, indp, in[(j << 6) + indp]);
if (val) {
encode_codeword(pb, run, run_to_cb[FFMIN(prev_run, 15)]);
prev_run = run;
run = 0;
level = get_level(val);
code = level - 1;
encode_codeword(pb, code, lev_to_cb[FFMIN(prev_level, 9)]);
prev_level = level;
put_bits(pb, 1, IS_NEGATIVE(val));
} else {
++run;
}
}
}
}
static void get(uint8_t *pixels, int stride, DCTELEM* block)
{
int16_t *p = (int16_t*)pixels;
int i, j;
stride >>= 1;
for (i = 0; i < 8; i++) {
for (j = 0; j < 8; j++) {
block[j] = p[j];
}
p += stride;
block += 8;
}
}
static void fdct_get(uint8_t *pixels, int stride, DCTELEM* block)
{
get(pixels, stride, block);
ff_jpeg_fdct_islow_10(block);
}
static int encode_slice_plane(AVCodecContext *avctx, int mb_count,
uint8_t *src, int src_stride, uint8_t *buf, unsigned buf_size,
int *qmat, int chroma)
{
DECLARE_ALIGNED(16, DCTELEM, blocks)[DEFAULT_SLICE_MB_WIDTH << 8], *block;
int i, blocks_per_slice;
PutBitContext pb;
block = blocks;
for (i = 0; i < mb_count; i++) {
fdct_get(src, src_stride, block + (0 << 6));
fdct_get(src + 8 * src_stride, src_stride, block + ((2 - chroma) << 6));
if (!chroma) {
fdct_get(src + 16, src_stride, block + (1 << 6));
fdct_get(src + 16 + 8 * src_stride, src_stride, block + (3 << 6));
}
block += (256 >> chroma);
src += (32 >> chroma);
}
blocks_per_slice = mb_count << (2 - chroma);
init_put_bits(&pb, buf, buf_size << 3);
encode_dc_coeffs(&pb, blocks, blocks_per_slice, qmat);
encode_ac_coeffs(avctx, &pb, blocks, blocks_per_slice, qmat);
flush_put_bits(&pb);
return put_bits_ptr(&pb) - pb.buf;
}
static av_always_inline unsigned encode_slice_data(AVCodecContext *avctx,
uint8_t *dest_y, uint8_t *dest_u, uint8_t *dest_v, int luma_stride,
int chroma_stride, unsigned mb_count, uint8_t *buf, unsigned data_size,
unsigned* y_data_size, unsigned* u_data_size, unsigned* v_data_size,
int qp)
{
ProresContext* ctx = avctx->priv_data;
*y_data_size = encode_slice_plane(avctx, mb_count, dest_y, luma_stride,
buf, data_size, ctx->qmat_luma[qp - 1], 0);
if (!(avctx->flags & CODEC_FLAG_GRAY)) {
*u_data_size = encode_slice_plane(avctx, mb_count, dest_u,
chroma_stride, buf + *y_data_size, data_size - *y_data_size,
ctx->qmat_chroma[qp - 1], 1);
*v_data_size = encode_slice_plane(avctx, mb_count, dest_v,
chroma_stride, buf + *y_data_size + *u_data_size,
data_size - *y_data_size - *u_data_size,
ctx->qmat_chroma[qp - 1], 1);
}
return *y_data_size + *u_data_size + *v_data_size;
}
static void subimage_with_fill(uint16_t *src, unsigned x, unsigned y,
unsigned stride, unsigned width, unsigned height, uint16_t *dst,
unsigned dst_width, unsigned dst_height)
{
int box_width = FFMIN(width - x, dst_width);
int box_height = FFMIN(height - y, dst_height);
int i, j, src_stride = stride >> 1;
uint16_t last_pix, *last_line;
src += y * src_stride + x;
for (i = 0; i < box_height; ++i) {
for (j = 0; j < box_width; ++j) {
dst[j] = src[j];
}
last_pix = dst[j - 1];
for (; j < dst_width; j++)
dst[j] = last_pix;
src += src_stride;
dst += dst_width;
}
last_line = dst - dst_width;
for (; i < dst_height; i++) {
for (j = 0; j < dst_width; ++j) {
dst[j] = last_line[j];
}
dst += dst_width;
}
}
static int encode_slice(AVCodecContext *avctx, AVFrame *pic, int mb_x,
int mb_y, unsigned mb_count, uint8_t *buf, unsigned data_size,
int unsafe, int *qp)
{
int luma_stride, chroma_stride;
int hdr_size = 6, slice_size;
uint8_t *dest_y, *dest_u, *dest_v;
unsigned y_data_size = 0, u_data_size = 0, v_data_size = 0;
ProresContext* ctx = avctx->priv_data;
int tgt_bits = (mb_count * bitrate_table[avctx->profile]) >> 2;
int low_bytes = (tgt_bits - (tgt_bits >> 3)) >> 3; // 12% bitrate fluctuation
int high_bytes = (tgt_bits + (tgt_bits >> 3)) >> 3;
luma_stride = pic->linesize[0];
chroma_stride = pic->linesize[1];
dest_y = pic->data[0] + (mb_y << 4) * luma_stride + (mb_x << 5);
dest_u = pic->data[1] + (mb_y << 4) * chroma_stride + (mb_x << 4);
dest_v = pic->data[2] + (mb_y << 4) * chroma_stride + (mb_x << 4);
if (unsafe) {
subimage_with_fill((uint16_t *) pic->data[0], mb_x << 4, mb_y << 4,
luma_stride, avctx->width, avctx->height,
(uint16_t *) ctx->fill_y, mb_count << 4, 16);
subimage_with_fill((uint16_t *) pic->data[1], mb_x << 3, mb_y << 4,
chroma_stride, avctx->width >> 1, avctx->height,
(uint16_t *) ctx->fill_u, mb_count << 3, 16);
subimage_with_fill((uint16_t *) pic->data[2], mb_x << 3, mb_y << 4,
chroma_stride, avctx->width >> 1, avctx->height,
(uint16_t *) ctx->fill_v, mb_count << 3, 16);
encode_slice_data(avctx, ctx->fill_y, ctx->fill_u, ctx->fill_v,
mb_count << 5, mb_count << 4, mb_count, buf + hdr_size,
data_size - hdr_size, &y_data_size, &u_data_size, &v_data_size,
*qp);
} else {
slice_size = encode_slice_data(avctx, dest_y, dest_u, dest_v,
luma_stride, chroma_stride, mb_count, buf + hdr_size,
data_size - hdr_size, &y_data_size, &u_data_size, &v_data_size,
*qp);
if (slice_size > high_bytes && *qp < qp_end_table[avctx->profile]) {
do {
*qp += 1;
slice_size = encode_slice_data(avctx, dest_y, dest_u, dest_v,
luma_stride, chroma_stride, mb_count, buf + hdr_size,
data_size - hdr_size, &y_data_size, &u_data_size,
&v_data_size, *qp);
} while (slice_size > high_bytes && *qp < qp_end_table[avctx->profile]);
} else if (slice_size < low_bytes && *qp
> qp_start_table[avctx->profile]) {
do {
*qp -= 1;
slice_size = encode_slice_data(avctx, dest_y, dest_u, dest_v,
luma_stride, chroma_stride, mb_count, buf + hdr_size,
data_size - hdr_size, &y_data_size, &u_data_size,
&v_data_size, *qp);
} while (slice_size < low_bytes && *qp > qp_start_table[avctx->profile]);
}
}
buf[0] = hdr_size << 3;
buf[1] = *qp;
AV_WB16(buf + 2, y_data_size);
AV_WB16(buf + 4, u_data_size);
return hdr_size + y_data_size + u_data_size + v_data_size;
}
static int prores_encode_picture(AVCodecContext *avctx, AVFrame *pic,
uint8_t *buf, const int buf_size)
{
int mb_width = (avctx->width + 15) >> 4;
int mb_height = (avctx->height + 15) >> 4;
int hdr_size, sl_size, i;
int mb_y, sl_data_size, qp;
int unsafe_bot, unsafe_right;
uint8_t *sl_data, *sl_data_sizes;
int slice_per_line = 0, rem = mb_width;
for (i = av_log2(DEFAULT_SLICE_MB_WIDTH); i >= 0; --i) {
slice_per_line += rem >> i;
rem &= (1 << i) - 1;
}
qp = qp_start_table[avctx->profile];
hdr_size = 8; sl_data_size = buf_size - hdr_size;
sl_data_sizes = buf + hdr_size;
sl_data = sl_data_sizes + (slice_per_line * mb_height * 2);
for (mb_y = 0; mb_y < mb_height; mb_y++) {
int mb_x = 0;
int slice_mb_count = DEFAULT_SLICE_MB_WIDTH;
while (mb_x < mb_width) {
while (mb_width - mb_x < slice_mb_count)
slice_mb_count >>= 1;
unsafe_bot = (avctx->height & 0xf) && (mb_y == mb_height - 1);
unsafe_right = (avctx->width & 0xf) && (mb_x + slice_mb_count == mb_width);
sl_size = encode_slice(avctx, pic, mb_x, mb_y, slice_mb_count,
sl_data, sl_data_size, unsafe_bot || unsafe_right, &qp);
bytestream_put_be16(&sl_data_sizes, sl_size);
sl_data += sl_size;
sl_data_size -= sl_size;
mb_x += slice_mb_count;
}
}
buf[0] = hdr_size << 3;
AV_WB32(buf + 1, sl_data - buf);
AV_WB16(buf + 5, slice_per_line * mb_height);
buf[7] = av_log2(DEFAULT_SLICE_MB_WIDTH) << 4;
return sl_data - buf;
}
static int prores_encode_frame(AVCodecContext *avctx, unsigned char *buf,
int buf_size, void *data)
{
AVFrame *pic = data;
int header_size = 148;
int pic_size = prores_encode_picture(avctx, pic, buf + header_size + 8,
buf_size - header_size - 8);
bytestream_put_be32(&buf, pic_size + 8 + header_size);
bytestream_put_buffer(&buf, "icpf", 4);
bytestream_put_be16(&buf, header_size);
bytestream_put_be16(&buf, 0);
bytestream_put_buffer(&buf, "fmpg", 4);
bytestream_put_be16(&buf, avctx->width);
bytestream_put_be16(&buf, avctx->height);
*buf++ = 0x83; // {10}(422){00}{00}(frame){11}
*buf++ = 0;
*buf++ = 2;
*buf++ = 2;
*buf++ = 6;
*buf++ = 32;
*buf++ = 0;
*buf++ = 3;
bytestream_put_buffer(&buf, QMAT_LUMA[avctx->profile], 64);
bytestream_put_buffer(&buf, QMAT_CHROMA[avctx->profile], 64);
return pic_size + 8 + header_size;
}
static void scale_mat(const uint8_t* src, int* dst, int scale)
{
int i;
for (i = 0; i < 64; i++)
dst[i] = src[i] * scale;
}
static av_cold int prores_encode_init(AVCodecContext *avctx)
{
int i;
ProresContext* ctx = avctx->priv_data;
if (avctx->pix_fmt != PIX_FMT_YUV422P10) {
av_log(avctx, AV_LOG_ERROR, "need YUV422P10\n");
return -1;
}
if (avctx->width & 0x1) {
av_log(avctx, AV_LOG_ERROR,
"frame width needs to be multiple of 2\n");
return -1;
}
if ((avctx->height & 0xf) || (avctx->width & 0xf)) {
ctx->fill_y = av_malloc(4 * (DEFAULT_SLICE_MB_WIDTH << 8));
if (!ctx->fill_y)
return AVERROR(ENOMEM);
ctx->fill_u = ctx->fill_y + (DEFAULT_SLICE_MB_WIDTH << 9);
ctx->fill_v = ctx->fill_u + (DEFAULT_SLICE_MB_WIDTH << 8);
}
if (avctx->profile == FF_PROFILE_UNKNOWN) {
avctx->profile = FF_PROFILE_PRORES_STANDARD;
av_log(avctx, AV_LOG_INFO,
"encoding with ProRes standard (apcn) profile\n");
} else if (avctx->profile < FF_PROFILE_PRORES_PROXY
|| avctx->profile > FF_PROFILE_PRORES_HQ) {
av_log(
avctx,
AV_LOG_ERROR,
"unknown profile %d, use [0 - apco, 1 - apcs, 2 - apcn (default), 3 - apch]\n",
avctx->profile);
return -1;
}
avctx->codec_tag = AV_RL32((const uint8_t*)profiles[avctx->profile].name);
for (i = 1; i <= 16; i++) {
scale_mat(QMAT_LUMA[avctx->profile] , ctx->qmat_luma[i - 1] , i);
scale_mat(QMAT_CHROMA[avctx->profile], ctx->qmat_chroma[i - 1], i);
}
avctx->coded_frame = avcodec_alloc_frame();
avctx->coded_frame->key_frame = 1;
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
return 0;
}
static av_cold int prores_encode_close(AVCodecContext *avctx)
{
ProresContext* ctx = avctx->priv_data;
av_freep(&avctx->coded_frame);
av_freep(&ctx->fill_y);
return 0;
}
AVCodec ff_prores_encoder = {
.name = "prores",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_PRORES,
.priv_data_size = sizeof(ProresContext),
.init = prores_encode_init,
.close = prores_encode_close,
.encode = prores_encode_frame,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV422P10, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("Apple ProRes"),
.capabilities = 0,
.profiles = profiles
};
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