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-rw-r--r--libavcodec/flicvideo.c445
1 files changed, 391 insertions, 54 deletions
diff --git a/libavcodec/flicvideo.c b/libavcodec/flicvideo.c
index b4556dc1ff..b1b7b5a42f 100644
--- a/libavcodec/flicvideo.c
+++ b/libavcodec/flicvideo.c
@@ -2,20 +2,20 @@
* FLI/FLC Animation Video Decoder
* Copyright (C) 2003, 2004 The FFmpeg project
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -27,8 +27,7 @@
* 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
+ * This decoder outputs PAL8/RGB555/RGB565/BGR24. 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",
@@ -64,7 +63,7 @@
#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", \
+ av_log (s->avctx, AV_LOG_ERROR, "Invalid pixel_ptr = %d > pixel_limit = %d\n", \
pixel_ptr + n, pixel_limit); \
return AVERROR_INVALIDDATA; \
} \
@@ -84,22 +83,40 @@ static av_cold int flic_decode_init(AVCodecContext *avctx)
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");
+ if (avctx->extradata_size != 0 &&
+ avctx->extradata_size != 12 &&
+ avctx->extradata_size != 128 &&
+ avctx->extradata_size != 256 &&
+ avctx->extradata_size != 904 &&
+ avctx->extradata_size != 1024) {
+ av_log(avctx, AV_LOG_ERROR, "Unexpected extradata size %d\n", avctx->extradata_size);
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 if (avctx->extradata_size == 1024) {
+ uint8_t *ptr = avctx->extradata;
+ int i;
+
+ for (i = 0; i < 256; i++) {
+ s->palette[i] = AV_RL32(ptr);
+ ptr += 4;
+ }
+ depth = 8;
+ /* FLI in MOV, see e.g. FFmpeg trac issue #626 */
+ } else if (avctx->extradata_size == 0 ||
+ avctx->extradata_size == 256 ||
+ /* see FFmpeg ticket #1234 */
+ avctx->extradata_size == 904) {
+ s->fli_type = FLI_TYPE_CODE;
+ depth = 8;
} else {
+ s->fli_type = AV_RL16(&fli_header[4]);
depth = AV_RL16(&fli_header[12]);
}
@@ -115,9 +132,7 @@ static av_cold int flic_decode_init(AVCodecContext *avctx)
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 no files to test with */
- avpriv_request_sample(avctx, "24bpp FLC/FLX");
- return AVERROR_PATCHWELCOME;
+ case 24 : avctx->pix_fmt = AV_PIX_FMT_BGR24; break;
default :
av_log(avctx, AV_LOG_ERROR, "Unknown FLC/FLX depth of %d Bpp is unsupported.\n",depth);
return AVERROR_INVALIDDATA;
@@ -139,7 +154,6 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
FlicDecodeContext *s = avctx->priv_data;
GetByteContext g2;
- int stream_ptr_after_color_chunk;
int pixel_ptr;
int palette_ptr;
unsigned char palette_idx1;
@@ -171,14 +185,16 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
bytestream2_init(&g2, buf, buf_size);
- if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+ if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
return ret;
- }
pixels = s->frame->data[0];
pixel_limit = s->avctx->height * s->frame->linesize[0];
+ if (buf_size < 16 || buf_size > INT_MAX - (3 * 256 + AV_INPUT_BUFFER_PADDING_SIZE))
+ return AVERROR_INVALIDDATA;
frame_size = bytestream2_get_le32(&g2);
+ if (frame_size > buf_size)
+ frame_size = buf_size;
bytestream2_skip(&g2, 2); /* skip the magic number */
num_chunks = bytestream2_get_le16(&g2);
bytestream2_skip(&g2, 8); /* skip padding */
@@ -186,15 +202,22 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
frame_size -= 16;
/* iterate through the chunks */
- while ((frame_size > 0) && (num_chunks > 0)) {
+ while ((frame_size >= 6) && (num_chunks > 0) &&
+ bytestream2_get_bytes_left(&g2) >= 4) {
+ int stream_ptr_after_chunk;
chunk_size = bytestream2_get_le32(&g2);
+ if (chunk_size > frame_size) {
+ av_log(avctx, AV_LOG_WARNING,
+ "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
+ chunk_size = frame_size;
+ }
+ stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
+
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
@@ -217,6 +240,9 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
if (color_changes == 0)
color_changes = 256;
+ if (bytestream2_tell(&g2) + color_changes * 3 > stream_ptr_after_chunk)
+ break;
+
for (j = 0; j < color_changes; j++) {
unsigned int entry;
@@ -227,26 +253,22 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
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;
+ entry = 0xFFU << 24 | r << 16 | g << 8 | b;
+ if (color_shift == 2)
+ entry |= entry >> 6 & 0x30303;
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) {
+ if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
+ break;
line_packets = bytestream2_get_le16(&g2);
if ((line_packets & 0xC000) == 0xC000) {
// line skip opcode
@@ -265,6 +287,8 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
CHECK_PIXEL_PTR(0);
pixel_countdown = s->avctx->width;
for (i = 0; i < line_packets; i++) {
+ if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
+ break;
/* account for the skip bytes */
pixel_skip = bytestream2_get_byte(&g2);
pixel_ptr += pixel_skip;
@@ -281,6 +305,8 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
}
} else {
CHECK_PIXEL_PTR(byte_run * 2);
+ if (bytestream2_tell(&g2) + byte_run * 2 > stream_ptr_after_chunk)
+ break;
for (j = 0; j < byte_run * 2; j++, pixel_countdown--) {
pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
}
@@ -303,16 +329,22 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
pixel_ptr = y_ptr;
CHECK_PIXEL_PTR(0);
pixel_countdown = s->avctx->width;
+ if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
+ break;
line_packets = bytestream2_get_byte(&g2);
if (line_packets > 0) {
for (i = 0; i < line_packets; i++) {
/* account for the skip bytes */
+ if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
+ break;
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);
+ if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
+ break;
for (j = 0; j < byte_run; j++, pixel_countdown--) {
pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
}
@@ -349,6 +381,8 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
bytestream2_skip(&g2, 1);
pixel_countdown = s->avctx->width;
while (pixel_countdown > 0) {
+ if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
+ break;
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
if (!byte_run) {
av_log(avctx, AV_LOG_ERROR, "Invalid byte run value.\n");
@@ -368,6 +402,8 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
} else { /* copy bytes if byte_run < 0 */
byte_run = -byte_run;
CHECK_PIXEL_PTR(byte_run);
+ if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
+ break;
for (j = 0; j < byte_run; j++) {
pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
pixel_countdown--;
@@ -384,22 +420,23 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
case FLI_COPY:
/* copy the chunk (uncompressed frame) */
- if (chunk_size - 6 > s->avctx->width * s->avctx->height) {
+ if (chunk_size - 6 != FFALIGN(s->avctx->width, 4) * 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);
+ "has incorrect size, 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);
+ if (s->avctx->width & 3)
+ bytestream2_skip(&g2, 4 - (s->avctx->width & 3));
}
}
break;
case FLI_MINI:
/* some sort of a thumbnail? disregard this chunk... */
- bytestream2_skip(&g2, chunk_size - 6);
break;
default:
@@ -407,14 +444,16 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
break;
}
+ if (stream_ptr_after_chunk - bytestream2_tell(&g2) > 0)
+ bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
+
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))
+ * size (minus 1 or 2, possibly); if it doesn't, issue a warning */
+ if (bytestream2_get_bytes_left(&g2) > 2)
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));
@@ -467,10 +506,8 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
bytestream2_init(&g2, buf, buf_size);
- if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+ if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
return ret;
- }
pixels = s->frame->data[0];
pixel_limit = s->avctx->height * s->frame->linesize[0];
@@ -479,14 +516,26 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
bytestream2_skip(&g2, 2); /* skip the magic number */
num_chunks = bytestream2_get_le16(&g2);
bytestream2_skip(&g2, 8); /* skip padding */
+ if (frame_size > buf_size)
+ frame_size = buf_size;
frame_size -= 16;
/* iterate through the chunks */
- while ((frame_size > 0) && (num_chunks > 0)) {
+ while ((frame_size > 0) && (num_chunks > 0) &&
+ bytestream2_get_bytes_left(&g2) >= 4) {
+ int stream_ptr_after_chunk;
chunk_size = bytestream2_get_le32(&g2);
+ if (chunk_size > frame_size) {
+ av_log(avctx, AV_LOG_WARNING,
+ "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
+ chunk_size = frame_size;
+ }
+ stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
+
chunk_type = bytestream2_get_le16(&g2);
+
switch (chunk_type) {
case FLI_256_COLOR:
case FLI_COLOR:
@@ -504,6 +553,8 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
y_ptr = 0;
compressed_lines = bytestream2_get_le16(&g2);
while (compressed_lines > 0) {
+ if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
+ break;
line_packets = bytestream2_get_le16(&g2);
if (line_packets < 0) {
line_packets = -line_packets;
@@ -515,6 +566,8 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
pixel_countdown = s->avctx->width;
for (i = 0; i < line_packets; i++) {
/* account for the skip bytes */
+ if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
+ break;
pixel_skip = bytestream2_get_byte(&g2);
pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */
pixel_countdown -= pixel_skip;
@@ -528,6 +581,8 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
pixel_ptr += 2;
}
} else {
+ if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
+ break;
CHECK_PIXEL_PTR(2 * byte_run);
for (j = 0; j < byte_run; j++, pixel_countdown--) {
*((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
@@ -562,6 +617,8 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
pixel_countdown = (s->avctx->width * 2);
while (pixel_countdown > 0) {
+ if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
+ break;
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
if (byte_run > 0) {
palette_idx1 = bytestream2_get_byte(&g2);
@@ -575,6 +632,8 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
}
} else { /* copy bytes if byte_run < 0 */
byte_run = -byte_run;
+ if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
+ break;
CHECK_PIXEL_PTR(byte_run);
for (j = 0; j < byte_run; j++) {
palette_idx1 = bytestream2_get_byte(&g2);
@@ -614,6 +673,8 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
while (pixel_countdown > 0) {
+ if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
+ break;
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
if (byte_run > 0) {
pixel = bytestream2_get_le16(&g2);
@@ -628,6 +689,8 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
}
} else { /* copy pixels if byte_run < 0 */
byte_run = -byte_run;
+ if (bytestream2_tell(&g2) + 2 * byte_run > stream_ptr_after_chunk)
+ break;
CHECK_PIXEL_PTR(2 * byte_run);
for (j = 0; j < byte_run; j++) {
*((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
@@ -647,7 +710,7 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
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) {
+ if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * 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);
@@ -663,6 +726,282 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
pixel_ptr += 2;
pixel_countdown--;
}
+ if (s->avctx->width & 1)
+ bytestream2_skip(&g2, 2);
+ }
+ }
+ 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));
+
+ if ((ret = av_frame_ref(data, s->frame)) < 0)
+ return ret;
+
+ *got_frame = 1;
+
+ return buf_size;
+}
+
+static int flic_decode_frame_24BPP(AVCodecContext *avctx,
+ void *data, int *got_frame,
+ const uint8_t *buf, int buf_size)
+{
+ 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, ret;
+
+ 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);
+
+ if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
+ return ret;
+
+ 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 */
+ if (frame_size > buf_size)
+ frame_size = buf_size;
+
+ frame_size -= 16;
+
+ /* iterate through the chunks */
+ while ((frame_size > 0) && (num_chunks > 0) &&
+ bytestream2_get_bytes_left(&g2) >= 4) {
+ int stream_ptr_after_chunk;
+ chunk_size = bytestream2_get_le32(&g2);
+ if (chunk_size > frame_size) {
+ av_log(avctx, AV_LOG_WARNING,
+ "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
+ chunk_size = frame_size;
+ }
+ stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
+
+ 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. */
+ ff_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) {
+ if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
+ break;
+ 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 */
+ if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
+ break;
+ pixel_skip = bytestream2_get_byte(&g2);
+ pixel_ptr += (pixel_skip*3); /* Pixel is 3 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_le24(&g2);
+ CHECK_PIXEL_PTR(3 * byte_run);
+ for (j = 0; j < byte_run; j++, pixel_countdown -= 1) {
+ AV_WL24(&pixels[pixel_ptr], pixel);
+ pixel_ptr += 3;
+ }
+ } else {
+ if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
+ break;
+ CHECK_PIXEL_PTR(2 * byte_run);
+ for (j = 0; j < byte_run; j++, pixel_countdown--) {
+ pixel = bytestream2_get_le24(&g2);
+ AV_WL24(&pixels[pixel_ptr], pixel);
+ pixel_ptr += 3;
+ }
+ }
+ }
+
+ y_ptr += s->frame->linesize[0];
+ }
+ }
+ break;
+
+ case FLI_LC:
+ av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
+ bytestream2_skip(&g2, chunk_size - 6);
+ break;
+
+ case FLI_BLACK:
+ /* set the whole frame to 0x00 which is black for 24 bit mode. */
+ memset(pixels, 0x00,
+ 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 * 3);
+
+ while (pixel_countdown > 0) {
+ if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
+ break;
+ 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;
+ if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
+ break;
+ 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);
+ }
+ }
+ }
+
+ 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) {
+ if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
+ break;
+ byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
+ if (byte_run > 0) {
+ pixel = bytestream2_get_le24(&g2);
+ CHECK_PIXEL_PTR(3 * byte_run);
+ for (j = 0; j < byte_run; j++) {
+ AV_WL24(pixels + pixel_ptr, pixel);
+ pixel_ptr += 3;
+ 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;
+ if (bytestream2_tell(&g2) + 3 * byte_run > stream_ptr_after_chunk)
+ break;
+ CHECK_PIXEL_PTR(3 * byte_run);
+ for (j = 0; j < byte_run; j++) {
+ pixel = bytestream2_get_le24(&g2);
+ AV_WL24(pixels + pixel_ptr, pixel);
+ pixel_ptr += 3;
+ 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)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*3) {
+ 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) {
+ pixel = bytestream2_get_le24(&g2);
+ AV_WL24(&pixels[y_ptr + pixel_ptr], pixel);
+ pixel_ptr += 3;
+ pixel_countdown--;
+ }
+ if (s->avctx->width & 1)
+ bytestream2_skip(&g2, 3);
}
}
break;
@@ -702,17 +1041,15 @@ static int flic_decode_frame(AVCodecContext *avctx,
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) {
- avpriv_request_sample(avctx, "24bpp FLC");
- return AVERROR_PATCHWELCOME;
+ 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 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-13 14:07:34 +0000