Updated FFMPEG to version 1.1.2, using this project: http://sourceforge.net/projects/ffmpeg4android/
This commit is contained in:
Sergii Pylypenko
321
project/jni/ffmpeg/libavcodec/escape130.c
Normal file
321
project/jni/ffmpeg/libavcodec/escape130.c
Normal file
@@ -0,0 +1,321 @@
|
||||
/*
|
||||
* Escape 130 Video Decoder
|
||||
* Copyright (C) 2008 Eli Friedman (eli.friedman <at> gmail.com)
|
||||
*
|
||||
* 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
|
||||
*/
|
||||
|
||||
#include "avcodec.h"
|
||||
|
||||
#define BITSTREAM_READER_LE
|
||||
#include "get_bits.h"
|
||||
#include "internal.h"
|
||||
|
||||
|
||||
typedef struct Escape130Context {
|
||||
AVFrame frame;
|
||||
uint8_t *bases;
|
||||
} Escape130Context;
|
||||
|
||||
/**
|
||||
* Initialize the decoder
|
||||
* @param avctx decoder context
|
||||
* @return 0 success, negative on error
|
||||
*/
|
||||
static av_cold int escape130_decode_init(AVCodecContext *avctx)
|
||||
{
|
||||
Escape130Context *s = avctx->priv_data;
|
||||
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
|
||||
|
||||
if((avctx->width&1) || (avctx->height&1)){
|
||||
av_log(avctx, AV_LOG_ERROR, "Dimensions are not a multiple of the block size\n");
|
||||
return AVERROR(EINVAL);
|
||||
}
|
||||
|
||||
s->bases= av_malloc(avctx->width * avctx->height /4);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static av_cold int escape130_decode_close(AVCodecContext *avctx)
|
||||
{
|
||||
Escape130Context *s = avctx->priv_data;
|
||||
|
||||
if (s->frame.data[0])
|
||||
avctx->release_buffer(avctx, &s->frame);
|
||||
|
||||
av_freep(&s->bases);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static unsigned decode_skip_count(GetBitContext* gb) {
|
||||
unsigned value;
|
||||
// This function reads a maximum of 27 bits,
|
||||
// which is within the padding space
|
||||
if (get_bits_left(gb) < 1+3)
|
||||
return -1;
|
||||
|
||||
value = get_bits1(gb);
|
||||
if (value)
|
||||
return 0;
|
||||
|
||||
value = get_bits(gb, 3);
|
||||
if (value)
|
||||
return value;
|
||||
|
||||
value = get_bits(gb, 8);
|
||||
if (value)
|
||||
return value + 7;
|
||||
|
||||
value = get_bits(gb, 15);
|
||||
if (value)
|
||||
return value + 262;
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Decode a single frame
|
||||
* @param avctx decoder context
|
||||
* @param data decoded frame
|
||||
* @param got_frame have decoded frame
|
||||
* @param buf input buffer
|
||||
* @param buf_size input buffer size
|
||||
* @return 0 success, -1 on error
|
||||
*/
|
||||
static int escape130_decode_frame(AVCodecContext *avctx,
|
||||
void *data, int *got_frame,
|
||||
AVPacket *avpkt)
|
||||
{
|
||||
const uint8_t *buf = avpkt->data;
|
||||
int buf_size = avpkt->size;
|
||||
Escape130Context *s = avctx->priv_data;
|
||||
|
||||
GetBitContext gb;
|
||||
unsigned i;
|
||||
|
||||
uint8_t *old_y, *old_cb, *old_cr,
|
||||
*new_y, *new_cb, *new_cr;
|
||||
unsigned old_y_stride, old_cb_stride, old_cr_stride,
|
||||
new_y_stride, new_cb_stride, new_cr_stride;
|
||||
unsigned total_blocks = avctx->width * avctx->height / 4,
|
||||
block_index, row_index = 0;
|
||||
unsigned y[4] = {0}, cb = 16, cr = 16;
|
||||
unsigned skip = -1;
|
||||
unsigned y_base = 0;
|
||||
uint8_t *yb= s->bases;
|
||||
|
||||
AVFrame new_frame = { { 0 } };
|
||||
|
||||
init_get_bits(&gb, buf, buf_size * 8);
|
||||
|
||||
if (get_bits_left(&gb) < 128)
|
||||
return -1;
|
||||
|
||||
// Header; no useful information in here
|
||||
skip_bits_long(&gb, 128);
|
||||
|
||||
new_frame.reference = 3;
|
||||
if (ff_get_buffer(avctx, &new_frame)) {
|
||||
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
new_y = new_frame.data[0];
|
||||
new_cb = new_frame.data[1];
|
||||
new_cr = new_frame.data[2];
|
||||
new_y_stride = new_frame.linesize[0];
|
||||
new_cb_stride = new_frame.linesize[1];
|
||||
new_cr_stride = new_frame.linesize[2];
|
||||
old_y = s->frame.data[0];
|
||||
old_cb = s->frame.data[1];
|
||||
old_cr = s->frame.data[2];
|
||||
old_y_stride = s->frame.linesize[0];
|
||||
old_cb_stride = s->frame.linesize[1];
|
||||
old_cr_stride = s->frame.linesize[2];
|
||||
|
||||
av_log(avctx, AV_LOG_DEBUG,
|
||||
"Strides: %i, %i\n",
|
||||
new_y_stride, new_cb_stride);
|
||||
|
||||
for (block_index = 0; block_index < total_blocks; block_index++) {
|
||||
// Note that this call will make us skip the rest of the blocks
|
||||
// if the frame prematurely ends
|
||||
if (skip == -1)
|
||||
skip = decode_skip_count(&gb);
|
||||
|
||||
if (skip) {
|
||||
if (old_y) {
|
||||
y[0] = old_y[0] / 4;
|
||||
y[1] = old_y[1] / 4;
|
||||
y[2] = old_y[old_y_stride] / 4;
|
||||
y[3] = old_y[old_y_stride+1] / 4;
|
||||
y_base= yb[0];
|
||||
cb = old_cb[0] / 8;
|
||||
cr = old_cr[0] / 8;
|
||||
} else {
|
||||
y_base=y[0] = y[1] = y[2] = y[3] = 0;
|
||||
cb = cr = 16;
|
||||
}
|
||||
} else {
|
||||
if (get_bits1(&gb)) {
|
||||
static const uint8_t offset_table[] = {2, 4, 10, 20};
|
||||
static const int8_t sign_table[64][4] =
|
||||
{ {0, 0, 0, 0},
|
||||
{-1, 1, 0, 0},
|
||||
{1, -1, 0, 0},
|
||||
{-1, 0, 1, 0},
|
||||
{-1, 1, 1, 0},
|
||||
{0, -1, 1, 0},
|
||||
{1, -1, 1, 0},
|
||||
{-1, -1, 1, 0},
|
||||
{1, 0, -1, 0},
|
||||
{0, 1, -1, 0},
|
||||
{1, 1, -1, 0},
|
||||
{-1, 1, -1, 0},
|
||||
{1, -1, -1, 0},
|
||||
{-1, 0, 0, 1},
|
||||
{-1, 1, 0, 1},
|
||||
{0, -1, 0, 1},
|
||||
|
||||
{0, 0, 0, 0},
|
||||
{1, -1, 0, 1},
|
||||
{-1, -1, 0, 1},
|
||||
{-1, 0, 1, 1},
|
||||
{-1, 1, 1, 1},
|
||||
{0, -1, 1, 1},
|
||||
{1, -1, 1, 1},
|
||||
{-1, -1, 1, 1},
|
||||
{0, 0, -1, 1},
|
||||
{1, 0, -1, 1},
|
||||
{-1, 0, -1, 1},
|
||||
{0, 1, -1, 1},
|
||||
{1, 1, -1, 1},
|
||||
{-1, 1, -1, 1},
|
||||
{0, -1, -1, 1},
|
||||
{1, -1, -1, 1},
|
||||
|
||||
{0, 0, 0, 0},
|
||||
{-1, -1, -1, 1},
|
||||
{1, 0, 0, -1},
|
||||
{0, 1, 0, -1},
|
||||
{1, 1, 0, -1},
|
||||
{-1, 1, 0, -1},
|
||||
{1, -1, 0, -1},
|
||||
{0, 0, 1, -1},
|
||||
{1, 0, 1, -1},
|
||||
{-1, 0, 1, -1},
|
||||
{0, 1, 1, -1},
|
||||
{1, 1, 1, -1},
|
||||
{-1, 1, 1, -1},
|
||||
{0, -1, 1, -1},
|
||||
{1, -1, 1, -1},
|
||||
{-1, -1, 1, -1},
|
||||
|
||||
{0, 0, 0, 0},
|
||||
{1, 0, -1, -1},
|
||||
{0, 1, -1, -1},
|
||||
{1, 1, -1, -1},
|
||||
{-1, 1, -1, -1},
|
||||
{1, -1, -1, -1} };
|
||||
unsigned sign_selector = get_bits(&gb, 6);
|
||||
unsigned difference_selector = get_bits(&gb, 2);
|
||||
y_base = 2 * get_bits(&gb, 5);
|
||||
for (i = 0; i < 4; i++) {
|
||||
y[i] = av_clip((int)y_base + offset_table[difference_selector] *
|
||||
sign_table[sign_selector][i], 0, 63);
|
||||
}
|
||||
} else if (get_bits1(&gb)) {
|
||||
if (get_bits1(&gb)) {
|
||||
y_base = get_bits(&gb, 6);
|
||||
} else {
|
||||
unsigned adjust_index = get_bits(&gb, 3);
|
||||
static const int8_t adjust[] = {-4, -3, -2, -1, 1, 2, 3, 4};
|
||||
y_base = (y_base + adjust[adjust_index]) & 63;
|
||||
}
|
||||
for (i = 0; i < 4; i++)
|
||||
y[i] = y_base;
|
||||
}
|
||||
|
||||
if (get_bits1(&gb)) {
|
||||
if (get_bits1(&gb)) {
|
||||
cb = get_bits(&gb, 5);
|
||||
cr = get_bits(&gb, 5);
|
||||
} else {
|
||||
unsigned adjust_index = get_bits(&gb, 3);
|
||||
static const int8_t adjust[2][8] =
|
||||
{ { 1, 1, 0, -1, -1, -1, 0, 1 },
|
||||
{ 0, 1, 1, 1, 0, -1, -1, -1 } };
|
||||
cb = (cb + adjust[0][adjust_index]) & 31;
|
||||
cr = (cr + adjust[1][adjust_index]) & 31;
|
||||
}
|
||||
}
|
||||
}
|
||||
*yb++= y_base;
|
||||
|
||||
new_y[0] = y[0] * 4;
|
||||
new_y[1] = y[1] * 4;
|
||||
new_y[new_y_stride] = y[2] * 4;
|
||||
new_y[new_y_stride + 1] = y[3] * 4;
|
||||
*new_cb = cb * 8;
|
||||
*new_cr = cr * 8;
|
||||
|
||||
if (old_y)
|
||||
old_y += 2, old_cb++, old_cr++;
|
||||
new_y += 2, new_cb++, new_cr++;
|
||||
row_index++;
|
||||
if (avctx->width / 2 == row_index) {
|
||||
row_index = 0;
|
||||
if (old_y) {
|
||||
old_y += old_y_stride * 2 - avctx->width;
|
||||
old_cb += old_cb_stride - avctx->width / 2;
|
||||
old_cr += old_cr_stride - avctx->width / 2;
|
||||
}
|
||||
new_y += new_y_stride * 2 - avctx->width;
|
||||
new_cb += new_cb_stride - avctx->width / 2;
|
||||
new_cr += new_cr_stride - avctx->width / 2;
|
||||
}
|
||||
|
||||
skip--;
|
||||
}
|
||||
|
||||
av_log(avctx, AV_LOG_DEBUG,
|
||||
"Escape sizes: %i, %i\n",
|
||||
buf_size, get_bits_count(&gb) / 8);
|
||||
|
||||
if (s->frame.data[0])
|
||||
avctx->release_buffer(avctx, &s->frame);
|
||||
|
||||
*(AVFrame*)data = s->frame = new_frame;
|
||||
*got_frame = 1;
|
||||
|
||||
return buf_size;
|
||||
}
|
||||
|
||||
|
||||
AVCodec ff_escape130_decoder = {
|
||||
.name = "escape130",
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.id = AV_CODEC_ID_ESCAPE130,
|
||||
.priv_data_size = sizeof(Escape130Context),
|
||||
.init = escape130_decode_init,
|
||||
.close = escape130_decode_close,
|
||||
.decode = escape130_decode_frame,
|
||||
.capabilities = CODEC_CAP_DR1,
|
||||
.long_name = NULL_IF_CONFIG_SMALL("Escape 130"),
|
||||
};
|
||||
Reference in New Issue
Block a user