Chiebot-Mirror
/
FFmpeg
mirror of https://github.com/FFmpeg/FFmpeg.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

prores: move data shared between decoder and encoder to common file

Browse Source
pull/3/merge
Kostya Shishkov 13 years ago
parent 3ec623c22f
commit 8835c2c829
4 changed files with 120 additions and 62 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 2
      libavcodec/Makefile
  2. 72
      libavcodec/proresdata.c
  3. 39
      libavcodec/proresdata.h
  4. 69
      libavcodec/proresdec.c

2
libavcodec/Makefile
Unescape View File

@ -301,7 +301,7 @@ OBJS-$(CONFIG_PNG_DECODER) += png.o pngdec.o pngdsp.o
OBJS-$(CONFIG_PNG_ENCODER) += png.o pngenc.o
OBJS-$(CONFIG_PPM_DECODER) += pnmdec.o pnm.o
OBJS-$(CONFIG_PPM_ENCODER) += pnmenc.o pnm.o
OBJS-$(CONFIG_PRORES_DECODER) += proresdec.o proresdsp.o
OBJS-$(CONFIG_PRORES_DECODER) += proresdec.o proresdata.o proresdsp.o
OBJS-$(CONFIG_PTX_DECODER) += ptx.o
OBJS-$(CONFIG_QCELP_DECODER) += qcelpdec.o celp_math.o \
celp_filters.o acelp_vectors.o \

72
libavcodec/proresdata.c
Unescape View File

@ -0,0 +1,72 @@
/*
* Apple ProRes compatible decoder
*
* Copyright (c) 2010-2011 Maxim Poliakovski
*
* 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
*/
#include "proresdata.h"
const uint8_t ff_prores_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
};
const uint8_t ff_prores_interlaced_scan[64] = {
0, 8, 1, 9, 16, 24, 17, 25,
2, 10, 3, 11, 18, 26, 19, 27,
32, 40, 33, 34, 41, 48, 56, 49,
42, 35, 43, 50, 57, 58, 51, 59,
4, 12, 5, 6, 13, 20, 28, 21,
14, 7, 15, 22, 29, 36, 44, 37,
30, 23, 31, 38, 45, 52, 60, 53,
46, 39, 47, 54, 61, 62, 55, 63
};
const uint8_t ff_prores_dc_codebook[4] = {
0x04, // rice_order = 0, exp_golomb_order = 1, switch_bits = 0
0x28, // rice_order = 1, exp_golomb_order = 2, switch_bits = 0
0x4D, // rice_order = 2, exp_golomb_order = 3, switch_bits = 1
0x70 // rice_order = 3, exp_golomb_order = 4, switch_bits = 0
};
const uint8_t ff_prores_ac_codebook[7] = {
0x04, // rice_order = 0, exp_golomb_order = 1, switch_bits = 0
0x28, // rice_order = 1, exp_golomb_order = 2, switch_bits = 0
0x4C, // rice_order = 2, exp_golomb_order = 3, switch_bits = 0
0x05, // rice_order = 0, exp_golomb_order = 1, switch_bits = 1
0x29, // rice_order = 1, exp_golomb_order = 2, switch_bits = 1
0x06, // rice_order = 0, exp_golomb_order = 1, switch_bits = 2
0x0A, // rice_order = 0, exp_golomb_order = 2, switch_bits = 2
};
/**
* Lookup tables for adaptive switching between codebooks
* according with previous run/level value.
*/
const uint8_t ff_prores_run_to_cb_index[16] =
{ 5, 5, 3, 3, 0, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 2 };
const uint8_t ff_prores_lev_to_cb_index[10] = { 0, 6, 3, 5, 0, 1, 1, 1, 1, 2 };

39
libavcodec/proresdata.h
Unescape View File

@ -0,0 +1,39 @@
/*
* Apple ProRes compatible decoder
*
* Copyright (c) 2010-2011 Maxim Poliakovski
*
* 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
*/
#ifndef AVCODEC_PRORESDATA_H
#define AVCODEC_PRORESDATA_H
#include <stdint.h>
#define FRAME_ID MKBETAG('i', 'c', 'p', 'f')
extern const uint8_t ff_prores_progressive_scan[64];
extern const uint8_t ff_prores_interlaced_scan[64];
#define FIRST_DC_CB 0xB8 // rice_order = 5, exp_golomb_order = 6, switch_bits = 0
extern const uint8_t ff_prores_dc_codebook[4];
extern const uint8_t ff_prores_ac_codebook[7];
extern const uint8_t ff_prores_run_to_cb_index[16];
extern const uint8_t ff_prores_lev_to_cb_index[10];
#endif /* AVCODEC_PRORESDATA_H */

69
libavcodec/proresdec.c
Unescape View File

@ -34,6 +34,7 @@
#include "libavutil/intmath.h"
#include "avcodec.h"
#include "proresdata.h"
#include "proresdsp.h"
#include "get_bits.h"
@ -75,29 +76,6 @@ typedef struct {
} ProresContext;
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 interlaced_scan[64] = {
0, 8, 1, 9, 16, 24, 17, 25,
2, 10, 3, 11, 18, 26, 19, 27,
32, 40, 33, 34, 41, 48, 56, 49,
42, 35, 43, 50, 57, 58, 51, 59,
4, 12, 5, 6, 13, 20, 28, 21,
14, 7, 15, 22, 29, 36, 44, 37,
30, 23, 31, 38, 45, 52, 60, 53,
46, 39, 47, 54, 61, 62, 55, 63
};
static av_cold int decode_init(AVCodecContext *avctx)
{
ProresContext *ctx = avctx->priv_data;
@ -175,10 +153,10 @@ static int decode_frame_header(ProresContext *ctx, const uint8_t *buf,
if (ctx->scantable_type != ctx->frame_type) {
if (!ctx->frame_type)
ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable,
progressive_scan);
ff_prores_progressive_scan);
else
ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable,
interlaced_scan);
ff_prores_interlaced_scan);
ctx->scantable_type = ctx->frame_type;
}
@ -352,16 +330,6 @@ static inline int decode_vlc_codeword(GetBitContext *gb, uint8_t codebook)
#define LSB2SIGN(x) (-((x) & 1))
#define TOSIGNED(x) (((x) >> 1) ^ LSB2SIGN(x))
#define FIRST_DC_CB 0xB8 // rice_order = 5, exp_golomb_order = 6, switch_bits = 0
static uint8_t dc_codebook[4] = {
0x04, // rice_order = 0, exp_golomb_order = 1, switch_bits = 0
0x28, // rice_order = 1, exp_golomb_order = 2, switch_bits = 0
0x4D, // rice_order = 2, exp_golomb_order = 3, switch_bits = 1
0x70 // rice_order = 3, exp_golomb_order = 4, switch_bits = 0
};
/**
* Decode DC coefficients for all blocks in a slice.
*/
@ -380,7 +348,7 @@ static inline void decode_dc_coeffs(GetBitContext *gb, DCTELEM *out,
delta = 3;
for (i = 1; i < nblocks; i++, out += 64) {
code = decode_vlc_codeword(gb, dc_codebook[FFMIN(FFABS(delta), 3)]);
code = decode_vlc_codeword(gb, ff_prores_dc_codebook[FFMIN(FFABS(delta), 3)]);
sign = -(((delta >> 15) & 1) ^ (code & 1));
delta = (((code + 1) >> 1) ^ sign) - sign;
@ -390,26 +358,6 @@ static inline void decode_dc_coeffs(GetBitContext *gb, DCTELEM *out,
}
static uint8_t ac_codebook[7] = {
0x04, // rice_order = 0, exp_golomb_order = 1, switch_bits = 0
0x28, // rice_order = 1, exp_golomb_order = 2, switch_bits = 0
0x4C, // rice_order = 2, exp_golomb_order = 3, switch_bits = 0
0x05, // rice_order = 0, exp_golomb_order = 1, switch_bits = 1
0x29, // rice_order = 1, exp_golomb_order = 2, switch_bits = 1
0x06, // rice_order = 0, exp_golomb_order = 1, switch_bits = 2
0x0A, // rice_order = 0, exp_golomb_order = 2, switch_bits = 2
};
/**
* Lookup tables for adaptive switching between codebooks
* according with previous run/level value.
*/
static uint8_t run_to_cb_index[16] =
{ 5, 5, 3, 3, 0, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 2 };
static uint8_t lev_to_cb_index[10] = { 0, 6, 3, 5, 0, 1, 1, 1, 1, 2 };
/**
* Decode AC coefficients for all blocks in a slice.
*/
@ -429,20 +377,20 @@ static inline void decode_ac_coeffs(GetBitContext *gb, DCTELEM *out,
block_mask = blocks_per_slice - 1;
for (pos = blocks_per_slice - 1; pos < max_coeffs;) {
run_cb_index = run_to_cb_index[FFMIN(run, 15)];
lev_cb_index = lev_to_cb_index[FFMIN(level, 9)];
run_cb_index = ff_prores_run_to_cb_index[FFMIN(run, 15)];
lev_cb_index = ff_prores_lev_to_cb_index[FFMIN(level, 9)];
bits_left = get_bits_left(gb);
if (bits_left <= 0 || (bits_left <= 8 && !show_bits(gb, bits_left)))
return;
run = decode_vlc_codeword(gb, ac_codebook[run_cb_index]);
run = decode_vlc_codeword(gb, ff_prores_ac_codebook[run_cb_index]);
bits_left = get_bits_left(gb);
if (bits_left <= 0 || (bits_left <= 8 && !show_bits(gb, bits_left)))
return;
level = decode_vlc_codeword(gb, ac_codebook[lev_cb_index]) + 1;
level = decode_vlc_codeword(gb, ff_prores_ac_codebook[lev_cb_index]) + 1;
pos += run + 1;
if (pos >= max_coeffs)
@ -629,7 +577,6 @@ static int decode_picture(ProresContext *ctx, int pic_num,
}
#define FRAME_ID MKBETAG('i', 'c', 'p', 'f')
#define MOVE_DATA_PTR(nbytes) buf += (nbytes); buf_size -= (nbytes)
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,

Write Preview
Loading…
Cancel
Save