mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
748 lines
28 KiB
C
748 lines
28 KiB
C
/*
|
|
* FLI/FLC Animation Video Decoder
|
|
* Copyright (C) 2003, 2004 the ffmpeg project
|
|
*
|
|
* 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
|
|
* Autodesk Animator FLI/FLC Video Decoder
|
|
* by Mike Melanson (melanson@pcisys.net)
|
|
* for more information on the .fli/.flc file format and all of its many
|
|
* variations, visit:
|
|
* http://www.compuphase.com/flic.htm
|
|
*
|
|
* This decoder outputs PAL8/RGB555/RGB565 and maybe one day RGB24
|
|
* colorspace data, depending on the FLC. To use this decoder, be
|
|
* sure that your demuxer sends the FLI file header to the decoder via
|
|
* the extradata chunk in AVCodecContext. The chunk should be 128 bytes
|
|
* large. The only exception is for FLI files from the game "Magic Carpet",
|
|
* in which the header is only 12 bytes.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avcodec.h"
|
|
#include "bytestream.h"
|
|
#include "mathops.h"
|
|
|
|
#define FLI_256_COLOR 4
|
|
#define FLI_DELTA 7
|
|
#define FLI_COLOR 11
|
|
#define FLI_LC 12
|
|
#define FLI_BLACK 13
|
|
#define FLI_BRUN 15
|
|
#define FLI_COPY 16
|
|
#define FLI_MINI 18
|
|
#define FLI_DTA_BRUN 25
|
|
#define FLI_DTA_COPY 26
|
|
#define FLI_DTA_LC 27
|
|
|
|
#define FLI_TYPE_CODE (0xAF11)
|
|
#define FLC_FLX_TYPE_CODE (0xAF12)
|
|
#define FLC_DTA_TYPE_CODE (0xAF44) /* Marks an "Extended FLC" comes from Dave's Targa Animator (DTA) */
|
|
#define FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE (0xAF13)
|
|
|
|
#define CHECK_PIXEL_PTR(n) \
|
|
if (pixel_ptr + n > pixel_limit) { \
|
|
av_log (s->avctx, AV_LOG_INFO, "Problem: pixel_ptr >= pixel_limit (%d >= %d)\n", \
|
|
pixel_ptr + n, pixel_limit); \
|
|
return -1; \
|
|
} \
|
|
|
|
typedef struct FlicDecodeContext {
|
|
AVCodecContext *avctx;
|
|
AVFrame frame;
|
|
|
|
unsigned int palette[256];
|
|
int new_palette;
|
|
int fli_type; /* either 0xAF11 or 0xAF12, affects palette resolution */
|
|
} FlicDecodeContext;
|
|
|
|
static av_cold int flic_decode_init(AVCodecContext *avctx)
|
|
{
|
|
FlicDecodeContext *s = avctx->priv_data;
|
|
unsigned char *fli_header = (unsigned char *)avctx->extradata;
|
|
int depth;
|
|
|
|
if (avctx->extradata_size != 12 &&
|
|
avctx->extradata_size != 128) {
|
|
av_log(avctx, AV_LOG_ERROR, "Expected extradata of 12 or 128 bytes\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
s->avctx = avctx;
|
|
|
|
s->fli_type = AV_RL16(&fli_header[4]); /* Might be overridden if a Magic Carpet FLC */
|
|
|
|
depth = 0;
|
|
if (s->avctx->extradata_size == 12) {
|
|
/* special case for magic carpet FLIs */
|
|
s->fli_type = FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE;
|
|
depth = 8;
|
|
} else {
|
|
depth = AV_RL16(&fli_header[12]);
|
|
}
|
|
|
|
if (depth == 0) {
|
|
depth = 8; /* Some FLC generators set depth to zero, when they mean 8Bpp. Fix up here */
|
|
}
|
|
|
|
if ((s->fli_type == FLC_FLX_TYPE_CODE) && (depth == 16)) {
|
|
depth = 15; /* Original Autodesk FLX's say the depth is 16Bpp when it is really 15Bpp */
|
|
}
|
|
|
|
switch (depth) {
|
|
case 8 : avctx->pix_fmt = AV_PIX_FMT_PAL8; break;
|
|
case 15 : avctx->pix_fmt = AV_PIX_FMT_RGB555; break;
|
|
case 16 : avctx->pix_fmt = AV_PIX_FMT_RGB565; break;
|
|
case 24 : avctx->pix_fmt = AV_PIX_FMT_BGR24; /* Supposedly BGR, but havent any files to test with */
|
|
av_log(avctx, AV_LOG_ERROR, "24Bpp FLC/FLX is unsupported due to no test files.\n");
|
|
return -1;
|
|
default :
|
|
av_log(avctx, AV_LOG_ERROR, "Unknown FLC/FLX depth of %d Bpp is unsupported.\n",depth);
|
|
return -1;
|
|
}
|
|
|
|
s->frame.data[0] = NULL;
|
|
s->new_palette = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int flic_decode_frame_8BPP(AVCodecContext *avctx,
|
|
void *data, int *got_frame,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
FlicDecodeContext *s = avctx->priv_data;
|
|
|
|
GetByteContext g2;
|
|
int stream_ptr_after_color_chunk;
|
|
int pixel_ptr;
|
|
int palette_ptr;
|
|
unsigned char palette_idx1;
|
|
unsigned char palette_idx2;
|
|
|
|
unsigned int frame_size;
|
|
int num_chunks;
|
|
|
|
unsigned int chunk_size;
|
|
int chunk_type;
|
|
|
|
int i, j;
|
|
|
|
int color_packets;
|
|
int color_changes;
|
|
int color_shift;
|
|
unsigned char r, g, b;
|
|
|
|
int lines;
|
|
int compressed_lines;
|
|
int starting_line;
|
|
signed short line_packets;
|
|
int y_ptr;
|
|
int byte_run;
|
|
int pixel_skip;
|
|
int pixel_countdown;
|
|
unsigned char *pixels;
|
|
unsigned int pixel_limit;
|
|
|
|
bytestream2_init(&g2, buf, buf_size);
|
|
|
|
s->frame.reference = 1;
|
|
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
|
|
if (avctx->reget_buffer(avctx, &s->frame) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
|
|
pixels = s->frame.data[0];
|
|
pixel_limit = s->avctx->height * s->frame.linesize[0];
|
|
frame_size = bytestream2_get_le32(&g2);
|
|
bytestream2_skip(&g2, 2); /* skip the magic number */
|
|
num_chunks = bytestream2_get_le16(&g2);
|
|
bytestream2_skip(&g2, 8); /* skip padding */
|
|
|
|
frame_size -= 16;
|
|
|
|
/* iterate through the chunks */
|
|
while ((frame_size > 0) && (num_chunks > 0)) {
|
|
chunk_size = bytestream2_get_le32(&g2);
|
|
chunk_type = bytestream2_get_le16(&g2);
|
|
|
|
switch (chunk_type) {
|
|
case FLI_256_COLOR:
|
|
case FLI_COLOR:
|
|
stream_ptr_after_color_chunk = bytestream2_tell(&g2) + chunk_size - 6;
|
|
|
|
/* check special case: If this file is from the Magic Carpet
|
|
* game and uses 6-bit colors even though it reports 256-color
|
|
* chunks in a 0xAF12-type file (fli_type is set to 0xAF13 during
|
|
* initialization) */
|
|
if ((chunk_type == FLI_256_COLOR) && (s->fli_type != FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE))
|
|
color_shift = 0;
|
|
else
|
|
color_shift = 2;
|
|
/* set up the palette */
|
|
color_packets = bytestream2_get_le16(&g2);
|
|
palette_ptr = 0;
|
|
for (i = 0; i < color_packets; i++) {
|
|
/* first byte is how many colors to skip */
|
|
palette_ptr += bytestream2_get_byte(&g2);
|
|
|
|
/* next byte indicates how many entries to change */
|
|
color_changes = bytestream2_get_byte(&g2);
|
|
|
|
/* if there are 0 color changes, there are actually 256 */
|
|
if (color_changes == 0)
|
|
color_changes = 256;
|
|
|
|
for (j = 0; j < color_changes; j++) {
|
|
unsigned int entry;
|
|
|
|
/* wrap around, for good measure */
|
|
if ((unsigned)palette_ptr >= 256)
|
|
palette_ptr = 0;
|
|
|
|
r = bytestream2_get_byte(&g2) << color_shift;
|
|
g = bytestream2_get_byte(&g2) << color_shift;
|
|
b = bytestream2_get_byte(&g2) << color_shift;
|
|
entry = (r << 16) | (g << 8) | b;
|
|
if (s->palette[palette_ptr] != entry)
|
|
s->new_palette = 1;
|
|
s->palette[palette_ptr++] = entry;
|
|
}
|
|
}
|
|
|
|
/* color chunks sometimes have weird 16-bit alignment issues;
|
|
* therefore, take the hardline approach and skip
|
|
* to the value calculated w.r.t. the size specified by the color
|
|
* chunk header */
|
|
if (stream_ptr_after_color_chunk - bytestream2_tell(&g2) > 0)
|
|
bytestream2_skip(&g2, stream_ptr_after_color_chunk - bytestream2_tell(&g2));
|
|
|
|
break;
|
|
|
|
case FLI_DELTA:
|
|
y_ptr = 0;
|
|
compressed_lines = bytestream2_get_le16(&g2);
|
|
while (compressed_lines > 0) {
|
|
line_packets = bytestream2_get_le16(&g2);
|
|
if ((line_packets & 0xC000) == 0xC000) {
|
|
// line skip opcode
|
|
line_packets = -line_packets;
|
|
y_ptr += line_packets * s->frame.linesize[0];
|
|
} else if ((line_packets & 0xC000) == 0x4000) {
|
|
av_log(avctx, AV_LOG_ERROR, "Undefined opcode (%x) in DELTA_FLI\n", line_packets);
|
|
} else if ((line_packets & 0xC000) == 0x8000) {
|
|
// "last byte" opcode
|
|
pixel_ptr= y_ptr + s->frame.linesize[0] - 1;
|
|
CHECK_PIXEL_PTR(0);
|
|
pixels[pixel_ptr] = line_packets & 0xff;
|
|
} else {
|
|
compressed_lines--;
|
|
pixel_ptr = y_ptr;
|
|
CHECK_PIXEL_PTR(0);
|
|
pixel_countdown = s->avctx->width;
|
|
for (i = 0; i < line_packets; i++) {
|
|
/* account for the skip bytes */
|
|
pixel_skip = bytestream2_get_byte(&g2);
|
|
pixel_ptr += pixel_skip;
|
|
pixel_countdown -= pixel_skip;
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
|
|
if (byte_run < 0) {
|
|
byte_run = -byte_run;
|
|
palette_idx1 = bytestream2_get_byte(&g2);
|
|
palette_idx2 = bytestream2_get_byte(&g2);
|
|
CHECK_PIXEL_PTR(byte_run * 2);
|
|
for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
|
|
pixels[pixel_ptr++] = palette_idx1;
|
|
pixels[pixel_ptr++] = palette_idx2;
|
|
}
|
|
} else {
|
|
CHECK_PIXEL_PTR(byte_run * 2);
|
|
for (j = 0; j < byte_run * 2; j++, pixel_countdown--) {
|
|
pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
|
|
}
|
|
}
|
|
}
|
|
|
|
y_ptr += s->frame.linesize[0];
|
|
}
|
|
}
|
|
break;
|
|
|
|
case FLI_LC:
|
|
/* line compressed */
|
|
starting_line = bytestream2_get_le16(&g2);
|
|
y_ptr = 0;
|
|
y_ptr += starting_line * s->frame.linesize[0];
|
|
|
|
compressed_lines = bytestream2_get_le16(&g2);
|
|
while (compressed_lines > 0) {
|
|
pixel_ptr = y_ptr;
|
|
CHECK_PIXEL_PTR(0);
|
|
pixel_countdown = s->avctx->width;
|
|
line_packets = bytestream2_get_byte(&g2);
|
|
if (line_packets > 0) {
|
|
for (i = 0; i < line_packets; i++) {
|
|
/* account for the skip bytes */
|
|
pixel_skip = bytestream2_get_byte(&g2);
|
|
pixel_ptr += pixel_skip;
|
|
pixel_countdown -= pixel_skip;
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2),8);
|
|
if (byte_run > 0) {
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++, pixel_countdown--) {
|
|
pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
|
|
}
|
|
} else if (byte_run < 0) {
|
|
byte_run = -byte_run;
|
|
palette_idx1 = bytestream2_get_byte(&g2);
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++, pixel_countdown--) {
|
|
pixels[pixel_ptr++] = palette_idx1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
y_ptr += s->frame.linesize[0];
|
|
compressed_lines--;
|
|
}
|
|
break;
|
|
|
|
case FLI_BLACK:
|
|
/* set the whole frame to color 0 (which is usually black) */
|
|
memset(pixels, 0,
|
|
s->frame.linesize[0] * s->avctx->height);
|
|
break;
|
|
|
|
case FLI_BRUN:
|
|
/* Byte run compression: This chunk type only occurs in the first
|
|
* FLI frame and it will update the entire frame. */
|
|
y_ptr = 0;
|
|
for (lines = 0; lines < s->avctx->height; lines++) {
|
|
pixel_ptr = y_ptr;
|
|
/* disregard the line packets; instead, iterate through all
|
|
* pixels on a row */
|
|
bytestream2_skip(&g2, 1);
|
|
pixel_countdown = s->avctx->width;
|
|
while (pixel_countdown > 0) {
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
|
|
if (byte_run > 0) {
|
|
palette_idx1 = bytestream2_get_byte(&g2);
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
pixels[pixel_ptr++] = palette_idx1;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
|
|
pixel_countdown, lines);
|
|
}
|
|
} else { /* copy bytes if byte_run < 0 */
|
|
byte_run = -byte_run;
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
|
|
pixel_countdown, lines);
|
|
}
|
|
}
|
|
}
|
|
|
|
y_ptr += s->frame.linesize[0];
|
|
}
|
|
break;
|
|
|
|
case FLI_COPY:
|
|
/* copy the chunk (uncompressed frame) */
|
|
if (chunk_size - 6 > s->avctx->width * s->avctx->height) {
|
|
av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
|
|
"bigger than image, skipping chunk\n", chunk_size - 6);
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
} else {
|
|
for (y_ptr = 0; y_ptr < s->frame.linesize[0] * s->avctx->height;
|
|
y_ptr += s->frame.linesize[0]) {
|
|
bytestream2_get_buffer(&g2, &pixels[y_ptr],
|
|
s->avctx->width);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case FLI_MINI:
|
|
/* some sort of a thumbnail? disregard this chunk... */
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
break;
|
|
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
|
|
break;
|
|
}
|
|
|
|
frame_size -= chunk_size;
|
|
num_chunks--;
|
|
}
|
|
|
|
/* by the end of the chunk, the stream ptr should equal the frame
|
|
* size (minus 1, possibly); if it doesn't, issue a warning */
|
|
if ((bytestream2_get_bytes_left(&g2) != 0) &&
|
|
(bytestream2_get_bytes_left(&g2) != 1))
|
|
av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
|
|
"and final chunk ptr = %d\n", buf_size,
|
|
buf_size - bytestream2_get_bytes_left(&g2));
|
|
|
|
/* make the palette available on the way out */
|
|
memcpy(s->frame.data[1], s->palette, AVPALETTE_SIZE);
|
|
if (s->new_palette) {
|
|
s->frame.palette_has_changed = 1;
|
|
s->new_palette = 0;
|
|
}
|
|
|
|
*got_frame = 1;
|
|
*(AVFrame*)data = s->frame;
|
|
|
|
return buf_size;
|
|
}
|
|
|
|
static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
|
|
void *data, int *got_frame,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
/* Note, the only difference between the 15Bpp and 16Bpp */
|
|
/* Format is the pixel format, the packets are processed the same. */
|
|
FlicDecodeContext *s = avctx->priv_data;
|
|
|
|
GetByteContext g2;
|
|
int pixel_ptr;
|
|
unsigned char palette_idx1;
|
|
|
|
unsigned int frame_size;
|
|
int num_chunks;
|
|
|
|
unsigned int chunk_size;
|
|
int chunk_type;
|
|
|
|
int i, j;
|
|
|
|
int lines;
|
|
int compressed_lines;
|
|
signed short line_packets;
|
|
int y_ptr;
|
|
int byte_run;
|
|
int pixel_skip;
|
|
int pixel_countdown;
|
|
unsigned char *pixels;
|
|
int pixel;
|
|
unsigned int pixel_limit;
|
|
|
|
bytestream2_init(&g2, buf, buf_size);
|
|
|
|
s->frame.reference = 1;
|
|
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
|
|
if (avctx->reget_buffer(avctx, &s->frame) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
|
|
pixels = s->frame.data[0];
|
|
pixel_limit = s->avctx->height * s->frame.linesize[0];
|
|
|
|
frame_size = bytestream2_get_le32(&g2);
|
|
bytestream2_skip(&g2, 2); /* skip the magic number */
|
|
num_chunks = bytestream2_get_le16(&g2);
|
|
bytestream2_skip(&g2, 8); /* skip padding */
|
|
|
|
frame_size -= 16;
|
|
|
|
/* iterate through the chunks */
|
|
while ((frame_size > 0) && (num_chunks > 0)) {
|
|
chunk_size = bytestream2_get_le32(&g2);
|
|
chunk_type = bytestream2_get_le16(&g2);
|
|
|
|
switch (chunk_type) {
|
|
case FLI_256_COLOR:
|
|
case FLI_COLOR:
|
|
/* For some reason, it seems that non-palettized flics do
|
|
* include one of these chunks in their first frame.
|
|
* Why I do not know, it seems rather extraneous. */
|
|
av_dlog(avctx,
|
|
"Unexpected Palette chunk %d in non-palettized FLC\n",
|
|
chunk_type);
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
break;
|
|
|
|
case FLI_DELTA:
|
|
case FLI_DTA_LC:
|
|
y_ptr = 0;
|
|
compressed_lines = bytestream2_get_le16(&g2);
|
|
while (compressed_lines > 0) {
|
|
line_packets = bytestream2_get_le16(&g2);
|
|
if (line_packets < 0) {
|
|
line_packets = -line_packets;
|
|
y_ptr += line_packets * s->frame.linesize[0];
|
|
} else {
|
|
compressed_lines--;
|
|
pixel_ptr = y_ptr;
|
|
CHECK_PIXEL_PTR(0);
|
|
pixel_countdown = s->avctx->width;
|
|
for (i = 0; i < line_packets; i++) {
|
|
/* account for the skip bytes */
|
|
pixel_skip = bytestream2_get_byte(&g2);
|
|
pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */
|
|
pixel_countdown -= pixel_skip;
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
|
|
if (byte_run < 0) {
|
|
byte_run = -byte_run;
|
|
pixel = bytestream2_get_le16(&g2);
|
|
CHECK_PIXEL_PTR(2 * byte_run);
|
|
for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = pixel;
|
|
pixel_ptr += 2;
|
|
}
|
|
} else {
|
|
CHECK_PIXEL_PTR(2 * byte_run);
|
|
for (j = 0; j < byte_run; j++, pixel_countdown--) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
|
|
pixel_ptr += 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
y_ptr += s->frame.linesize[0];
|
|
}
|
|
}
|
|
break;
|
|
|
|
case FLI_LC:
|
|
av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-paletised FLC\n");
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
break;
|
|
|
|
case FLI_BLACK:
|
|
/* set the whole frame to 0x0000 which is black in both 15Bpp and 16Bpp modes. */
|
|
memset(pixels, 0x0000,
|
|
s->frame.linesize[0] * s->avctx->height);
|
|
break;
|
|
|
|
case FLI_BRUN:
|
|
y_ptr = 0;
|
|
for (lines = 0; lines < s->avctx->height; lines++) {
|
|
pixel_ptr = y_ptr;
|
|
/* disregard the line packets; instead, iterate through all
|
|
* pixels on a row */
|
|
bytestream2_skip(&g2, 1);
|
|
pixel_countdown = (s->avctx->width * 2);
|
|
|
|
while (pixel_countdown > 0) {
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
|
|
if (byte_run > 0) {
|
|
palette_idx1 = bytestream2_get_byte(&g2);
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
pixels[pixel_ptr++] = palette_idx1;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
|
|
pixel_countdown, lines);
|
|
}
|
|
} else { /* copy bytes if byte_run < 0 */
|
|
byte_run = -byte_run;
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
palette_idx1 = bytestream2_get_byte(&g2);
|
|
pixels[pixel_ptr++] = palette_idx1;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
|
|
pixel_countdown, lines);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed.
|
|
* This does not give us any good opportunity to perform word endian conversion
|
|
* during decompression. So if it is required (i.e., this is not a LE target, we do
|
|
* a second pass over the line here, swapping the bytes.
|
|
*/
|
|
#if HAVE_BIGENDIAN
|
|
pixel_ptr = y_ptr;
|
|
pixel_countdown = s->avctx->width;
|
|
while (pixel_countdown > 0) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[pixel_ptr]);
|
|
pixel_ptr += 2;
|
|
}
|
|
#endif
|
|
y_ptr += s->frame.linesize[0];
|
|
}
|
|
break;
|
|
|
|
case FLI_DTA_BRUN:
|
|
y_ptr = 0;
|
|
for (lines = 0; lines < s->avctx->height; lines++) {
|
|
pixel_ptr = y_ptr;
|
|
/* disregard the line packets; instead, iterate through all
|
|
* pixels on a row */
|
|
bytestream2_skip(&g2, 1);
|
|
pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
|
|
|
|
while (pixel_countdown > 0) {
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
|
|
if (byte_run > 0) {
|
|
pixel = bytestream2_get_le16(&g2);
|
|
CHECK_PIXEL_PTR(2 * byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = pixel;
|
|
pixel_ptr += 2;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
|
|
pixel_countdown);
|
|
}
|
|
} else { /* copy pixels if byte_run < 0 */
|
|
byte_run = -byte_run;
|
|
CHECK_PIXEL_PTR(2 * byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
|
|
pixel_ptr += 2;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
|
|
pixel_countdown);
|
|
}
|
|
}
|
|
}
|
|
|
|
y_ptr += s->frame.linesize[0];
|
|
}
|
|
break;
|
|
|
|
case FLI_COPY:
|
|
case FLI_DTA_COPY:
|
|
/* copy the chunk (uncompressed frame) */
|
|
if (chunk_size - 6 > (unsigned int)(s->avctx->width * s->avctx->height)*2) {
|
|
av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
|
|
"bigger than image, skipping chunk\n", chunk_size - 6);
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
} else {
|
|
|
|
for (y_ptr = 0; y_ptr < s->frame.linesize[0] * s->avctx->height;
|
|
y_ptr += s->frame.linesize[0]) {
|
|
|
|
pixel_countdown = s->avctx->width;
|
|
pixel_ptr = 0;
|
|
while (pixel_countdown > 0) {
|
|
*((signed short*)(&pixels[y_ptr + pixel_ptr])) = bytestream2_get_le16(&g2);
|
|
pixel_ptr += 2;
|
|
pixel_countdown--;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case FLI_MINI:
|
|
/* some sort of a thumbnail? disregard this chunk... */
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
break;
|
|
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
|
|
break;
|
|
}
|
|
|
|
frame_size -= chunk_size;
|
|
num_chunks--;
|
|
}
|
|
|
|
/* by the end of the chunk, the stream ptr should equal the frame
|
|
* size (minus 1, possibly); if it doesn't, issue a warning */
|
|
if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
|
|
av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
|
|
"and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
|
|
|
|
|
|
*got_frame = 1;
|
|
*(AVFrame*)data = s->frame;
|
|
|
|
return buf_size;
|
|
}
|
|
|
|
static int flic_decode_frame_24BPP(AVCodecContext *avctx,
|
|
void *data, int *got_frame,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
av_log(avctx, AV_LOG_ERROR, "24Bpp FLC Unsupported due to lack of test files.\n");
|
|
return -1;
|
|
}
|
|
|
|
static int flic_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *got_frame,
|
|
AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
|
|
return flic_decode_frame_8BPP(avctx, data, got_frame,
|
|
buf, buf_size);
|
|
}
|
|
else if ((avctx->pix_fmt == AV_PIX_FMT_RGB555) ||
|
|
(avctx->pix_fmt == AV_PIX_FMT_RGB565)) {
|
|
return flic_decode_frame_15_16BPP(avctx, data, got_frame,
|
|
buf, buf_size);
|
|
}
|
|
else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
|
|
return flic_decode_frame_24BPP(avctx, data, got_frame,
|
|
buf, buf_size);
|
|
}
|
|
|
|
/* Should not get here, ever as the pix_fmt is processed */
|
|
/* in flic_decode_init and the above if should deal with */
|
|
/* the finite set of possibilites allowable by here. */
|
|
/* But in case we do, just error out. */
|
|
av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n");
|
|
return -1;
|
|
}
|
|
|
|
|
|
static av_cold int flic_decode_end(AVCodecContext *avctx)
|
|
{
|
|
FlicDecodeContext *s = avctx->priv_data;
|
|
|
|
if (s->frame.data[0])
|
|
avctx->release_buffer(avctx, &s->frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_flic_decoder = {
|
|
.name = "flic",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_FLIC,
|
|
.priv_data_size = sizeof(FlicDecodeContext),
|
|
.init = flic_decode_init,
|
|
.close = flic_decode_end,
|
|
.decode = flic_decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Autodesk Animator Flic video"),
|
|
};
|