mirror of
https://github.com/nyanmisaka/ffmpeg-rockchip.git
synced 2025-10-31 12:36:41 +08:00
605 lines
18 KiB
C
605 lines
18 KiB
C
/*
|
|
* Duck TrueMotion 1.0 Decoder
|
|
* Copyright (C) 2003 Alex Beregszaszi & Mike Melanson
|
|
*
|
|
* This library 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 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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 this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
/**
|
|
* @file truemotion1.c
|
|
* Duck TrueMotion v1 Video Decoder by
|
|
* Alex Beregszaszi (alex@fsn.hu) and
|
|
* Mike Melanson (melanson@pcisys.net)
|
|
*
|
|
* The TrueMotion v1 decoder presently only decodes 16-bit TM1 data and
|
|
* outputs RGB555 data. 24-bit TM1 data is not supported yet.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "common.h"
|
|
#include "avcodec.h"
|
|
#include "dsputil.h"
|
|
|
|
#include "truemotion1data.h"
|
|
|
|
#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
|
|
|
|
typedef struct TrueMotion1Context {
|
|
AVCodecContext *avctx;
|
|
AVFrame frame;
|
|
AVFrame prev_frame;
|
|
|
|
unsigned char *buf;
|
|
int size;
|
|
|
|
unsigned char *mb_change_bits;
|
|
int mb_change_bits_row_size;
|
|
unsigned char *index_stream;
|
|
int index_stream_size;
|
|
|
|
int flags;
|
|
int x, y, w, h;
|
|
|
|
uint32_t y_predictor_table[1024];
|
|
uint32_t c_predictor_table[1024];
|
|
|
|
int compression;
|
|
int block_type;
|
|
int block_width;
|
|
int block_height;
|
|
|
|
int16_t *ydt;
|
|
int16_t *cdt;
|
|
int16_t *fat_ydt;
|
|
int16_t *fat_cdt;
|
|
|
|
int last_deltaset, last_vectable;
|
|
|
|
unsigned int *vert_pred;
|
|
|
|
} TrueMotion1Context;
|
|
|
|
#define FLAG_SPRITE 32
|
|
#define FLAG_KEYFRAME 16
|
|
#define FLAG_INTERFRAME 8
|
|
#define FLAG_INTERPOLATED 4
|
|
|
|
struct frame_header {
|
|
uint8_t header_size;
|
|
uint8_t compression;
|
|
uint8_t deltaset;
|
|
uint8_t vectable;
|
|
uint16_t ysize;
|
|
uint16_t xsize;
|
|
uint16_t checksum;
|
|
uint8_t version;
|
|
uint8_t header_type;
|
|
uint8_t flags;
|
|
uint8_t control;
|
|
uint16_t xoffset;
|
|
uint16_t yoffset;
|
|
uint16_t width;
|
|
uint16_t height;
|
|
};
|
|
|
|
#define ALGO_NOP 0
|
|
#define ALGO_RGB16V 1
|
|
#define ALGO_RGB16H 2
|
|
#define ALGO_RGB24H 3
|
|
|
|
/* these are the various block sizes that can occupy a 4x4 block */
|
|
#define BLOCK_2x2 0
|
|
#define BLOCK_2x4 1
|
|
#define BLOCK_4x2 2
|
|
#define BLOCK_4x4 3
|
|
|
|
typedef struct comp_types {
|
|
int algorithm;
|
|
int block_width;
|
|
int block_height;
|
|
int block_type;
|
|
} comp_types;
|
|
|
|
/* { valid for metatype }, algorithm, num of deltas, horiz res, vert res */
|
|
static comp_types compression_types[17] = {
|
|
{ ALGO_NOP, 0, 0, 0 },
|
|
|
|
{ ALGO_RGB16V, 4, 4, BLOCK_4x4 },
|
|
{ ALGO_RGB16H, 4, 4, BLOCK_4x4 },
|
|
{ ALGO_RGB16V, 4, 2, BLOCK_4x2 },
|
|
{ ALGO_RGB16H, 4, 2, BLOCK_4x2 },
|
|
|
|
{ ALGO_RGB16V, 2, 4, BLOCK_2x4 },
|
|
{ ALGO_RGB16H, 2, 4, BLOCK_2x4 },
|
|
{ ALGO_RGB16V, 2, 2, BLOCK_2x2 },
|
|
{ ALGO_RGB16H, 2, 2, BLOCK_2x2 },
|
|
|
|
{ ALGO_NOP, 4, 4, BLOCK_4x4 },
|
|
{ ALGO_RGB24H, 4, 4, BLOCK_4x4 },
|
|
{ ALGO_NOP, 4, 2, BLOCK_4x2 },
|
|
{ ALGO_RGB24H, 4, 2, BLOCK_4x2 },
|
|
|
|
{ ALGO_NOP, 2, 4, BLOCK_2x4 },
|
|
{ ALGO_RGB24H, 2, 4, BLOCK_2x4 },
|
|
{ ALGO_NOP, 2, 2, BLOCK_2x2 },
|
|
{ ALGO_RGB24H, 2, 2, BLOCK_2x2 }
|
|
};
|
|
|
|
static void select_delta_tables(TrueMotion1Context *s, int delta_table_index)
|
|
{
|
|
int i;
|
|
|
|
if (delta_table_index > 3)
|
|
return;
|
|
|
|
s->ydt = ydts[delta_table_index];
|
|
s->cdt = cdts[delta_table_index];
|
|
s->fat_ydt = fat_ydts[delta_table_index];
|
|
s->fat_cdt = fat_cdts[delta_table_index];
|
|
|
|
/* Y skinny deltas need to be halved for some reason; maybe the
|
|
* skinny Y deltas should be modified */
|
|
for (i = 0; i < 8; i++)
|
|
{
|
|
/* drop the lsb before dividing by 2-- net effect: round down
|
|
* when dividing a negative number (e.g., -3/2 = -2, not -1) */
|
|
s->ydt[i] &= 0xFFFE;
|
|
s->ydt[i] /= 2;
|
|
}
|
|
}
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
static int make_ydt_entry(int p2, int p1, int16_t *ydt)
|
|
#else
|
|
static int make_ydt_entry(int p1, int p2, int16_t *ydt)
|
|
#endif
|
|
{
|
|
int lo, hi;
|
|
|
|
lo = ydt[p1];
|
|
lo += (lo << 5) + (lo << 10);
|
|
hi = ydt[p2];
|
|
hi += (hi << 5) + (hi << 10);
|
|
return ((lo + (hi << 16)) << 1);
|
|
}
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
static int make_cdt_entry(int p2, int p1, int16_t *cdt)
|
|
#else
|
|
static int make_cdt_entry(int p1, int p2, int16_t *cdt)
|
|
#endif
|
|
{
|
|
int r, b, lo;
|
|
|
|
b = cdt[p2];
|
|
r = cdt[p1] << 10;
|
|
lo = b + r;
|
|
return ((lo + (lo << 16)) << 1);
|
|
}
|
|
|
|
static void gen_vector_table(TrueMotion1Context *s, uint8_t *sel_vector_table)
|
|
{
|
|
int len, i, j;
|
|
unsigned char delta_pair;
|
|
|
|
for (i = 0; i < 1024; i += 4)
|
|
{
|
|
len = *sel_vector_table++ / 2;
|
|
for (j = 0; j < len; j++)
|
|
{
|
|
delta_pair = *sel_vector_table++;
|
|
s->y_predictor_table[i+j] = 0xfffffffe &
|
|
make_ydt_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
|
|
s->c_predictor_table[i+j] = 0xfffffffe &
|
|
make_cdt_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
|
|
}
|
|
s->y_predictor_table[i+(j-1)] |= 1;
|
|
s->c_predictor_table[i+(j-1)] |= 1;
|
|
}
|
|
}
|
|
|
|
/* Returns the number of bytes consumed from the bytestream. Returns -1 if
|
|
* there was an error while decoding the header */
|
|
static int truemotion1_decode_header(TrueMotion1Context *s)
|
|
{
|
|
int i;
|
|
struct frame_header header;
|
|
uint8_t header_buffer[128]; /* logical maximum size of the header */
|
|
uint8_t *sel_vector_table;
|
|
|
|
/* There is 1 change bit per 4 pixels, so each change byte represents
|
|
* 32 pixels; divide width by 4 to obtain the number of change bits and
|
|
* then round up to the nearest byte. */
|
|
s->mb_change_bits_row_size = ((s->avctx->width >> 2) + 7) >> 3;
|
|
|
|
header.header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f;
|
|
if (s->buf[0] < 0x10)
|
|
{
|
|
printf("invalid header size\n");
|
|
return -1;
|
|
}
|
|
|
|
/* unscramble the header bytes with a XOR operation */
|
|
memset(header_buffer, 0, 128);
|
|
for (i = 1; i < header.header_size; i++)
|
|
header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
|
|
header.compression = header_buffer[0];
|
|
header.deltaset = header_buffer[1];
|
|
header.vectable = header_buffer[2];
|
|
header.ysize = LE_16(&header_buffer[3]);
|
|
header.xsize = LE_16(&header_buffer[5]);
|
|
header.checksum = LE_16(&header_buffer[7]);
|
|
header.version = header_buffer[9];
|
|
header.header_type = header_buffer[10];
|
|
header.flags = header_buffer[11];
|
|
header.control = header_buffer[12];
|
|
|
|
/* Version 2 */
|
|
if (header.version >= 2)
|
|
{
|
|
if (header.header_type > 3)
|
|
{
|
|
av_log(s->avctx, AV_LOG_ERROR, "truemotion1: invalid header type\n");
|
|
return -1;
|
|
} else if ((header.header_type == 2) || (header.header_type == 3)) {
|
|
s->flags = header.flags;
|
|
if (!(s->flags & FLAG_INTERFRAME))
|
|
s->flags |= FLAG_KEYFRAME;
|
|
} else
|
|
s->flags = FLAG_KEYFRAME;
|
|
} else /* Version 1 */
|
|
s->flags = FLAG_KEYFRAME;
|
|
|
|
if (s->flags & FLAG_SPRITE) {
|
|
s->w = header.width;
|
|
s->h = header.height;
|
|
s->x = header.xoffset;
|
|
s->y = header.yoffset;
|
|
} else {
|
|
s->w = header.xsize;
|
|
s->h = header.ysize;
|
|
if (header.header_type < 2) {
|
|
if ((s->w < 213) && (s->h >= 176))
|
|
s->flags |= FLAG_INTERPOLATED;
|
|
}
|
|
}
|
|
|
|
if (header.compression > 17) {
|
|
printf("invalid compression type (%d)\n", header.compression);
|
|
return -1;
|
|
}
|
|
|
|
if ((header.deltaset != s->last_deltaset) ||
|
|
(header.vectable != s->last_vectable))
|
|
select_delta_tables(s, header.deltaset);
|
|
|
|
if ((header.compression & 1) && header.header_type)
|
|
sel_vector_table = pc_tbl2;
|
|
else {
|
|
if (header.vectable < 4)
|
|
sel_vector_table = tables[header.vectable - 1];
|
|
else {
|
|
printf("invalid vector table id (%d)\n", header.vectable);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
|
|
{
|
|
if (compression_types[header.compression].algorithm == ALGO_RGB24H)
|
|
{
|
|
printf("24bit compression not yet supported\n");
|
|
}
|
|
else
|
|
gen_vector_table(s, sel_vector_table);
|
|
}
|
|
|
|
/* set up pointers to the other key data chunks */
|
|
s->mb_change_bits = s->buf + header.header_size;
|
|
if (s->flags & FLAG_KEYFRAME) {
|
|
/* no change bits specified for a keyframe; only index bytes */
|
|
s->index_stream = s->mb_change_bits;
|
|
} else {
|
|
/* one change bit per 4x4 block */
|
|
s->index_stream = s->mb_change_bits +
|
|
(s->mb_change_bits_row_size * (s->avctx->height >> 2));
|
|
}
|
|
s->index_stream_size = s->size - (s->index_stream - s->buf);
|
|
|
|
s->last_deltaset = header.deltaset;
|
|
s->last_vectable = header.vectable;
|
|
s->compression = header.compression;
|
|
s->block_width = compression_types[header.compression].block_width;
|
|
s->block_height = compression_types[header.compression].block_height;
|
|
s->block_type = compression_types[header.compression].block_type;
|
|
|
|
return header.header_size;
|
|
}
|
|
|
|
static int truemotion1_decode_init(AVCodecContext *avctx)
|
|
{
|
|
TrueMotion1Context *s = (TrueMotion1Context *)avctx->priv_data;
|
|
|
|
s->avctx = avctx;
|
|
|
|
avctx->pix_fmt = PIX_FMT_RGB555;
|
|
avctx->has_b_frames = 0;
|
|
s->frame.data[0] = s->prev_frame.data[0] = NULL;
|
|
|
|
/* there is a vertical predictor for each pixel in a line; each vertical
|
|
* predictor is 0 to start with */
|
|
s->vert_pred =
|
|
(unsigned int *)av_malloc(s->avctx->width * sizeof(unsigned short));
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define GET_NEXT_INDEX() \
|
|
{\
|
|
if (index_stream_index >= s->index_stream_size) { \
|
|
printf (" help! truemotion1 decoder went out of bounds\n"); \
|
|
return; \
|
|
} \
|
|
index = s->index_stream[index_stream_index++] * 4; \
|
|
}
|
|
|
|
#define APPLY_C_PREDICTOR() \
|
|
predictor_pair = s->c_predictor_table[index]; \
|
|
horiz_pred += (predictor_pair >> 1); \
|
|
if (predictor_pair & 1) { \
|
|
GET_NEXT_INDEX() \
|
|
if (!index) { \
|
|
GET_NEXT_INDEX() \
|
|
predictor_pair = s->c_predictor_table[index]; \
|
|
horiz_pred += ((predictor_pair >> 1) * 5); \
|
|
if (predictor_pair & 1) \
|
|
GET_NEXT_INDEX() \
|
|
else \
|
|
index++; \
|
|
} \
|
|
} else \
|
|
index++;
|
|
|
|
#define APPLY_Y_PREDICTOR() \
|
|
predictor_pair = s->y_predictor_table[index]; \
|
|
horiz_pred += (predictor_pair >> 1); \
|
|
if (predictor_pair & 1) { \
|
|
GET_NEXT_INDEX() \
|
|
if (!index) { \
|
|
GET_NEXT_INDEX() \
|
|
predictor_pair = s->y_predictor_table[index]; \
|
|
horiz_pred += ((predictor_pair >> 1) * 5); \
|
|
if (predictor_pair & 1) \
|
|
GET_NEXT_INDEX() \
|
|
else \
|
|
index++; \
|
|
} \
|
|
} else \
|
|
index++;
|
|
|
|
#define OUTPUT_PIXEL_PAIR() \
|
|
*current_pixel_pair = *vert_pred + horiz_pred; \
|
|
*vert_pred++ = *current_pixel_pair++; \
|
|
prev_pixel_pair++;
|
|
|
|
static void truemotion1_decode_16bit(TrueMotion1Context *s)
|
|
{
|
|
int y;
|
|
int pixels_left; /* remaining pixels on this line */
|
|
unsigned int predictor_pair;
|
|
unsigned int horiz_pred;
|
|
unsigned int *vert_pred;
|
|
unsigned int *current_pixel_pair;
|
|
unsigned int *prev_pixel_pair;
|
|
unsigned char *current_line = s->frame.data[0];
|
|
unsigned char *prev_line = s->prev_frame.data[0];
|
|
int keyframe = s->flags & FLAG_KEYFRAME;
|
|
|
|
/* these variables are for managing the stream of macroblock change bits */
|
|
unsigned char *mb_change_bits = s->mb_change_bits;
|
|
unsigned char mb_change_byte;
|
|
unsigned char mb_change_byte_mask;
|
|
int mb_change_index;
|
|
|
|
/* these variables are for managing the main index stream */
|
|
int index_stream_index = 0; /* yes, the index into the index stream */
|
|
int index;
|
|
|
|
/* clean out the line buffer */
|
|
memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned short));
|
|
|
|
GET_NEXT_INDEX();
|
|
|
|
for (y = 0; y < s->avctx->height; y++) {
|
|
|
|
/* re-init variables for the next line iteration */
|
|
horiz_pred = 0;
|
|
current_pixel_pair = (unsigned int *)current_line;
|
|
prev_pixel_pair = (unsigned int *)prev_line;
|
|
vert_pred = s->vert_pred;
|
|
mb_change_index = 0;
|
|
mb_change_byte = mb_change_bits[mb_change_index++];
|
|
mb_change_byte_mask = 0x01;
|
|
pixels_left = s->avctx->width;
|
|
|
|
while (pixels_left > 0) {
|
|
|
|
if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
|
|
|
|
switch (y & 3) {
|
|
case 0:
|
|
/* if macroblock width is 2, apply C-Y-C-Y; else
|
|
* apply C-Y-Y */
|
|
if (s->block_width == 2) {
|
|
APPLY_C_PREDICTOR();
|
|
APPLY_Y_PREDICTOR();
|
|
OUTPUT_PIXEL_PAIR();
|
|
APPLY_C_PREDICTOR();
|
|
APPLY_Y_PREDICTOR();
|
|
OUTPUT_PIXEL_PAIR();
|
|
} else {
|
|
APPLY_C_PREDICTOR();
|
|
APPLY_Y_PREDICTOR();
|
|
OUTPUT_PIXEL_PAIR();
|
|
APPLY_Y_PREDICTOR();
|
|
OUTPUT_PIXEL_PAIR();
|
|
}
|
|
break;
|
|
|
|
case 1:
|
|
case 3:
|
|
/* always apply 2 Y predictors on these iterations */
|
|
APPLY_Y_PREDICTOR();
|
|
OUTPUT_PIXEL_PAIR();
|
|
APPLY_Y_PREDICTOR();
|
|
OUTPUT_PIXEL_PAIR();
|
|
break;
|
|
|
|
case 2:
|
|
/* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
|
|
* depending on the macroblock type */
|
|
if (s->block_type == BLOCK_2x2) {
|
|
APPLY_C_PREDICTOR();
|
|
APPLY_Y_PREDICTOR();
|
|
OUTPUT_PIXEL_PAIR();
|
|
APPLY_C_PREDICTOR();
|
|
APPLY_Y_PREDICTOR();
|
|
OUTPUT_PIXEL_PAIR();
|
|
} else if (s->block_type == BLOCK_4x2) {
|
|
APPLY_C_PREDICTOR();
|
|
APPLY_Y_PREDICTOR();
|
|
OUTPUT_PIXEL_PAIR();
|
|
APPLY_Y_PREDICTOR();
|
|
OUTPUT_PIXEL_PAIR();
|
|
} else {
|
|
APPLY_Y_PREDICTOR();
|
|
OUTPUT_PIXEL_PAIR();
|
|
APPLY_Y_PREDICTOR();
|
|
OUTPUT_PIXEL_PAIR();
|
|
}
|
|
break;
|
|
}
|
|
|
|
} else {
|
|
|
|
/* skip (copy) four pixels, but reassign the horizontal
|
|
* predictor */
|
|
*current_pixel_pair = *prev_pixel_pair++;
|
|
*vert_pred++ = *current_pixel_pair++;
|
|
*current_pixel_pair = *prev_pixel_pair++;
|
|
horiz_pred = *current_pixel_pair - *vert_pred;
|
|
*vert_pred++ = *current_pixel_pair++;
|
|
|
|
}
|
|
|
|
if (!keyframe) {
|
|
mb_change_byte_mask <<= 1;
|
|
|
|
/* next byte */
|
|
if (!mb_change_byte_mask) {
|
|
mb_change_byte = mb_change_bits[mb_change_index++];
|
|
mb_change_byte_mask = 0x01;
|
|
}
|
|
}
|
|
|
|
pixels_left -= 4;
|
|
}
|
|
|
|
/* next change row */
|
|
if (((y + 1) & 3) == 0)
|
|
mb_change_bits += s->mb_change_bits_row_size;
|
|
|
|
current_line += s->frame.linesize[0];
|
|
prev_line += s->prev_frame.linesize[0];
|
|
}
|
|
}
|
|
|
|
static int truemotion1_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
uint8_t *buf, int buf_size)
|
|
{
|
|
TrueMotion1Context *s = (TrueMotion1Context *)avctx->priv_data;
|
|
|
|
s->buf = buf;
|
|
s->size = buf_size;
|
|
|
|
s->frame.reference = 1;
|
|
if (avctx->get_buffer(avctx, &s->frame) < 0) {
|
|
fprintf(stderr, "truemotion1: get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
|
|
/* no supplementary picture */
|
|
if (buf_size == 0)
|
|
return 0;
|
|
|
|
*data_size = 0;
|
|
|
|
if (truemotion1_decode_header(s) == -1)
|
|
return -1;
|
|
|
|
/* check for a do-nothing frame and copy the previous frame */
|
|
if (compression_types[s->compression].algorithm == ALGO_NOP)
|
|
{
|
|
memcpy(s->frame.data[0], s->prev_frame.data[0],
|
|
s->frame.linesize[0] * s->avctx->height);
|
|
} else if (compression_types[s->compression].algorithm == ALGO_RGB24H) {
|
|
printf (" 24-bit Duck TrueMotion decoding not yet implemented\n");
|
|
} else {
|
|
truemotion1_decode_16bit(s);
|
|
}
|
|
|
|
if (s->prev_frame.data[0])
|
|
avctx->release_buffer(avctx, &s->prev_frame);
|
|
|
|
/* shuffle frames */
|
|
s->prev_frame = s->frame;
|
|
|
|
*data_size = sizeof(AVFrame);
|
|
*(AVFrame*)data = s->frame;
|
|
|
|
/* report that the buffer was completely consumed */
|
|
return buf_size;
|
|
}
|
|
|
|
static int truemotion1_decode_end(AVCodecContext *avctx)
|
|
{
|
|
TrueMotion1Context *s = (TrueMotion1Context *)avctx->priv_data;
|
|
|
|
/* release the last frame */
|
|
if (s->prev_frame.data[0])
|
|
avctx->release_buffer(avctx, &s->prev_frame);
|
|
|
|
av_free(s->vert_pred);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec truemotion1_decoder = {
|
|
"truemotion1",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_TRUEMOTION1,
|
|
sizeof(TrueMotion1Context),
|
|
truemotion1_decode_init,
|
|
NULL,
|
|
truemotion1_decode_end,
|
|
truemotion1_decode_frame,
|
|
CODEC_CAP_DR1,
|
|
};
|