* FLI/FLC Animation Video Decoder
* Copyright (C) 2003, 2004 the ffmpeg project
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file flic.c
+ * @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 colorspace data. To use this decoder, be
+ * 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",
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
-#include "common.h"
+#include "libavutil/intreadwrite.h"
#include "avcodec.h"
-#include "bswap.h"
+#include "bytestream.h"
+#include "mathops.h"
#define FLI_256_COLOR 4
#define FLI_DELTA 7
#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;
int fli_type; /* either 0xAF11 or 0xAF12, affects palette resolution */
} FlicDecodeContext;
-static int flic_decode_init(AVCodecContext *avctx)
+static av_cold int flic_decode_init(AVCodecContext *avctx)
{
- FlicDecodeContext *s = (FlicDecodeContext *)avctx->priv_data;
+ 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;
- avctx->pix_fmt = PIX_FMT_PAL8;
- avctx->has_b_frames = 0;
+ 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 = 0xAF13;
- } else if (s->avctx->extradata_size == 128) {
- s->fli_type = LE_16(&fli_header[4]);
+ s->fli_type = FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE;
+ depth = 8;
} else {
- av_log(avctx, AV_LOG_ERROR, "Expected extradata of 12 or 128 bytes\n");
- return -1;
+ 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 = PIX_FMT_PAL8; break;
+ case 15 : avctx->pix_fmt = PIX_FMT_RGB555; break;
+ case 16 : avctx->pix_fmt = PIX_FMT_RGB565; break;
+ case 24 : avctx->pix_fmt = 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;
return 0;
}
-static int flic_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
+static int flic_decode_frame_8BPP(AVCodecContext *avctx,
+ void *data, int *data_size,
+ const uint8_t *buf, int buf_size)
{
- FlicDecodeContext *s = (FlicDecodeContext *)avctx->priv_data;
+ FlicDecodeContext *s = avctx->priv_data;
- int stream_ptr = 0;
+ GetByteContext g2;
int stream_ptr_after_color_chunk;
int pixel_ptr;
int palette_ptr;
int starting_line;
signed short line_packets;
int y_ptr;
- signed char byte_run;
+ 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;
}
pixels = s->frame.data[0];
-
- frame_size = LE_32(&buf[stream_ptr]);
- stream_ptr += 6; /* skip the magic number */
- num_chunks = LE_16(&buf[stream_ptr]);
- stream_ptr += 10; /* skip padding */
+ 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 = LE_32(&buf[stream_ptr]);
- stream_ptr += 4;
- chunk_type = LE_16(&buf[stream_ptr]);
- stream_ptr += 2;
+ 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 = stream_ptr + chunk_size - 6;
- s->new_palette = 1;
+ 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
+ /* 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 != 0xAF13))
+ 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 = LE_16(&buf[stream_ptr]);
- stream_ptr += 2;
+ 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 += buf[stream_ptr++];
+ palette_ptr += bytestream2_get_byte(&g2);
/* next byte indicates how many entries to change */
- color_changes = buf[stream_ptr++];
+ 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 = buf[stream_ptr++] << color_shift;
- g = buf[stream_ptr++] << color_shift;
- b = buf[stream_ptr++] << color_shift;
- s->palette[palette_ptr++] = (r << 16) | (g << 8) | b;
+ 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 set the stream_ptr
+ * therefore, take the hardline approach and skip
* to the value calculated w.r.t. the size specified by the color
* chunk header */
- stream_ptr = stream_ptr_after_color_chunk;
+ 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 = LE_16(&buf[stream_ptr]);
- stream_ptr += 2;
+ compressed_lines = bytestream2_get_le16(&g2);
while (compressed_lines > 0) {
- line_packets = LE_16(&buf[stream_ptr]);
- stream_ptr += 2;
- if (line_packets < 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 = buf[stream_ptr++];
+ pixel_skip = bytestream2_get_byte(&g2);
pixel_ptr += pixel_skip;
pixel_countdown -= pixel_skip;
- byte_run = buf[stream_ptr++];
+ byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
if (byte_run < 0) {
byte_run = -byte_run;
- palette_idx1 = buf[stream_ptr++];
- palette_idx2 = buf[stream_ptr++];
+ 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--) {
- palette_idx1 = buf[stream_ptr++];
- pixels[pixel_ptr++] = palette_idx1;
+ pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
}
}
}
case FLI_LC:
/* line compressed */
- starting_line = LE_16(&buf[stream_ptr]);
- stream_ptr += 2;
+ starting_line = bytestream2_get_le16(&g2);
y_ptr = 0;
y_ptr += starting_line * s->frame.linesize[0];
- compressed_lines = LE_16(&buf[stream_ptr]);
- stream_ptr += 2;
+ 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 = buf[stream_ptr++];
+ line_packets = bytestream2_get_byte(&g2);
if (line_packets > 0) {
for (i = 0; i < line_packets; i++) {
/* account for the skip bytes */
- pixel_skip = buf[stream_ptr++];
+ pixel_skip = bytestream2_get_byte(&g2);
pixel_ptr += pixel_skip;
pixel_countdown -= pixel_skip;
- byte_run = buf[stream_ptr++];
+ 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--) {
- palette_idx1 = buf[stream_ptr++];
- pixels[pixel_ptr++] = palette_idx1;
+ pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
}
- } else {
+ } else if (byte_run < 0) {
byte_run = -byte_run;
- palette_idx1 = buf[stream_ptr++];
+ 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;
}
pixel_ptr = y_ptr;
/* disregard the line packets; instead, iterate through all
* pixels on a row */
- stream_ptr++;
+ bytestream2_skip(&g2, 1);
pixel_countdown = s->avctx->width;
while (pixel_countdown > 0) {
- byte_run = buf[stream_ptr++];
+ byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
if (byte_run > 0) {
- palette_idx1 = buf[stream_ptr++];
+ 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)\n",
- pixel_countdown);
+ 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++) {
- palette_idx1 = buf[stream_ptr++];
- pixels[pixel_ptr++] = palette_idx1;
+ pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
pixel_countdown--;
if (pixel_countdown < 0)
- av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
- pixel_countdown);
+ av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
+ pixel_countdown, lines);
}
}
}
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);
- stream_ptr += 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]) {
- memcpy(&pixels[y_ptr], &buf[stream_ptr],
- s->avctx->width);
- stream_ptr += s->avctx->width;
+ bytestream2_get_buffer(&g2, &pixels[y_ptr],
+ s->avctx->width);
}
}
break;
case FLI_MINI:
/* some sort of a thumbnail? disregard this chunk... */
- stream_ptr += chunk_size - 6;
+ bytestream2_skip(&g2, chunk_size - 6);
break;
default:
/* 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 ((stream_ptr != buf_size) && (stream_ptr != buf_size - 1))
+ 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, stream_ptr);
+ "and final chunk ptr = %d\n", buf_size,
+ buf_size - bytestream2_get_bytes_left(&g2));
/* make the palette available on the way out */
-// if (s->new_palette) {
- if (1) {
- memcpy(s->frame.data[1], s->palette, AVPALETTE_SIZE);
+ memcpy(s->frame.data[1], s->palette, AVPALETTE_SIZE);
+ if (s->new_palette) {
s->frame.palette_has_changed = 1;
s->new_palette = 0;
}
return buf_size;
}
-static int flic_decode_end(AVCodecContext *avctx)
+static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
+ void *data, int *data_size,
+ 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_log(avctx, AV_LOG_ERROR, "Unexpected Palette chunk %d in non-paletised 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 oportunity 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));
+
+
+ *data_size=sizeof(AVFrame);
+ *(AVFrame*)data = s->frame;
+
+ return buf_size;
+}
+
+static int flic_decode_frame_24BPP(AVCodecContext *avctx,
+ void *data, int *data_size,
+ 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 *data_size,
+ AVPacket *avpkt)
+{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ if (avctx->pix_fmt == PIX_FMT_PAL8) {
+ return flic_decode_frame_8BPP(avctx, data, data_size,
+ buf, buf_size);
+ }
+ else if ((avctx->pix_fmt == PIX_FMT_RGB555) ||
+ (avctx->pix_fmt == PIX_FMT_RGB565)) {
+ return flic_decode_frame_15_16BPP(avctx, data, data_size,
+ buf, buf_size);
+ }
+ else if (avctx->pix_fmt == PIX_FMT_BGR24) {
+ return flic_decode_frame_24BPP(avctx, data, data_size,
+ 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;
return 0;
}
-AVCodec flic_decoder = {
- "flic",
- CODEC_TYPE_VIDEO,
- CODEC_ID_FLIC,
- sizeof(FlicDecodeContext),
- flic_decode_init,
- NULL,
- flic_decode_end,
- flic_decode_frame,
- CODEC_CAP_DR1,
- NULL
+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"),
};
projects / ffmpeg / blobdiff