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Diffstat (limited to 'libavcodec/vqavideo.c')
-rw-r--r--libavcodec/vqavideo.c102
1 files changed, 50 insertions, 52 deletions
diff --git a/libavcodec/vqavideo.c b/libavcodec/vqavideo.c
index 86f2fcfbcd..c34849d577 100644
--- a/libavcodec/vqavideo.c
+++ b/libavcodec/vqavideo.c
@@ -2,20 +2,20 @@
* Westwood Studios VQA Video Decoder
* Copyright (C) 2003 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
*/
@@ -128,7 +128,7 @@ static av_cold int vqa_decode_init(AVCodecContext *avctx)
/* make sure the extradata made it */
if (s->avctx->extradata_size != VQA_HEADER_SIZE) {
- av_log(s->avctx, AV_LOG_ERROR, " VQA video: expected extradata size of %d\n", VQA_HEADER_SIZE);
+ av_log(s->avctx, AV_LOG_ERROR, "expected extradata size of %d\n", VQA_HEADER_SIZE);
return AVERROR(EINVAL);
}
@@ -162,8 +162,7 @@ static av_cold int vqa_decode_init(AVCodecContext *avctx)
return AVERROR_INVALIDDATA;
}
- if (s->width & (s->vector_width - 1) ||
- s->height & (s->vector_height - 1)) {
+ if (s->width % s->vector_width || s->height % s->vector_height) {
av_log(avctx, AV_LOG_ERROR, "Image size not multiple of block size\n");
return AVERROR_INVALIDDATA;
}
@@ -180,7 +179,7 @@ static av_cold int vqa_decode_init(AVCodecContext *avctx)
/* allocate decode buffer */
s->decode_buffer_size = (s->width / s->vector_width) *
(s->height / s->vector_height) * 2;
- s->decode_buffer = av_malloc(s->decode_buffer_size);
+ s->decode_buffer = av_mallocz(s->decode_buffer_size);
if (!s->decode_buffer)
goto fail;
@@ -208,22 +207,22 @@ fail:
#define CHECK_COUNT() \
if (dest_index + count > dest_size) { \
- av_log(NULL, AV_LOG_ERROR, " VQA video: decode_format80 problem: next op would overflow dest_index\n"); \
- av_log(NULL, AV_LOG_ERROR, " VQA video: current dest_index = %d, count = %d, dest_size = %d\n", \
+ av_log(s->avctx, AV_LOG_ERROR, "decode_format80 problem: next op would overflow dest_index\n"); \
+ av_log(s->avctx, AV_LOG_ERROR, "current dest_index = %d, count = %d, dest_size = %d\n", \
dest_index, count, dest_size); \
return AVERROR_INVALIDDATA; \
}
#define CHECK_COPY(idx) \
if (idx < 0 || idx + count > dest_size) { \
- av_log(NULL, AV_LOG_ERROR, " VQA video: decode_format80 problem: next op would overflow dest_index\n"); \
- av_log(NULL, AV_LOG_ERROR, " VQA video: current src_pos = %d, count = %d, dest_size = %d\n", \
+ av_log(s->avctx, AV_LOG_ERROR, "decode_format80 problem: next op would overflow dest_index\n"); \
+ av_log(s->avctx, AV_LOG_ERROR, "current src_pos = %d, count = %d, dest_size = %d\n", \
src_pos, count, dest_size); \
return AVERROR_INVALIDDATA; \
}
-static int decode_format80(GetByteContext *gb, int src_size,
+static int decode_format80(VqaContext *s, int src_size,
unsigned char *dest, int dest_size, int check_size) {
int dest_index = 0;
@@ -232,26 +231,26 @@ static int decode_format80(GetByteContext *gb, int src_size,
unsigned char color;
int i;
- start = bytestream2_tell(gb);
- while (bytestream2_tell(gb) - start < src_size) {
- opcode = bytestream2_get_byte(gb);
- av_dlog(NULL, " opcode %02X: ", opcode);
+ start = bytestream2_tell(&s->gb);
+ while (bytestream2_tell(&s->gb) - start < src_size) {
+ opcode = bytestream2_get_byte(&s->gb);
+ av_dlog(s->avctx, "opcode %02X: ", opcode);
/* 0x80 means that frame is finished */
if (opcode == 0x80)
- return 0;
+ break;
if (dest_index >= dest_size) {
- av_log(NULL, AV_LOG_ERROR, " VQA video: decode_format80 problem: dest_index (%d) exceeded dest_size (%d)\n",
+ av_log(s->avctx, AV_LOG_ERROR, "decode_format80 problem: dest_index (%d) exceeded dest_size (%d)\n",
dest_index, dest_size);
return AVERROR_INVALIDDATA;
}
if (opcode == 0xFF) {
- count = bytestream2_get_le16(gb);
- src_pos = bytestream2_get_le16(gb);
- av_dlog(NULL, "(1) copy %X bytes from absolute pos %X\n", count, src_pos);
+ count = bytestream2_get_le16(&s->gb);
+ src_pos = bytestream2_get_le16(&s->gb);
+ av_dlog(s->avctx, "(1) copy %X bytes from absolute pos %X\n", count, src_pos);
CHECK_COUNT();
CHECK_COPY(src_pos);
for (i = 0; i < count; i++)
@@ -260,9 +259,9 @@ static int decode_format80(GetByteContext *gb, int src_size,
} else if (opcode == 0xFE) {
- count = bytestream2_get_le16(gb);
- color = bytestream2_get_byte(gb);
- av_dlog(NULL, "(2) set %X bytes to %02X\n", count, color);
+ count = bytestream2_get_le16(&s->gb);
+ color = bytestream2_get_byte(&s->gb);
+ av_dlog(s->avctx, "(2) set %X bytes to %02X\n", count, color);
CHECK_COUNT();
memset(&dest[dest_index], color, count);
dest_index += count;
@@ -270,8 +269,8 @@ static int decode_format80(GetByteContext *gb, int src_size,
} else if ((opcode & 0xC0) == 0xC0) {
count = (opcode & 0x3F) + 3;
- src_pos = bytestream2_get_le16(gb);
- av_dlog(NULL, "(3) copy %X bytes from absolute pos %X\n", count, src_pos);
+ src_pos = bytestream2_get_le16(&s->gb);
+ av_dlog(s->avctx, "(3) copy %X bytes from absolute pos %X\n", count, src_pos);
CHECK_COUNT();
CHECK_COPY(src_pos);
for (i = 0; i < count; i++)
@@ -281,16 +280,16 @@ static int decode_format80(GetByteContext *gb, int src_size,
} else if (opcode > 0x80) {
count = opcode & 0x3F;
- av_dlog(NULL, "(4) copy %X bytes from source to dest\n", count);
+ av_dlog(s->avctx, "(4) copy %X bytes from source to dest\n", count);
CHECK_COUNT();
- bytestream2_get_buffer(gb, &dest[dest_index], count);
+ bytestream2_get_buffer(&s->gb, &dest[dest_index], count);
dest_index += count;
} else {
count = ((opcode & 0x70) >> 4) + 3;
- src_pos = bytestream2_get_byte(gb) | ((opcode & 0x0F) << 8);
- av_dlog(NULL, "(5) copy %X bytes from relpos %X\n", count, src_pos);
+ src_pos = bytestream2_get_byte(&s->gb) | ((opcode & 0x0F) << 8);
+ av_dlog(s->avctx, "(5) copy %X bytes from relpos %X\n", count, src_pos);
CHECK_COUNT();
CHECK_COPY(dest_index - src_pos);
for (i = 0; i < count; i++)
@@ -304,9 +303,11 @@ static int decode_format80(GetByteContext *gb, int src_size,
* codebook entry; it is not important for compressed codebooks because
* not every entry needs to be filled */
if (check_size)
- if (dest_index < dest_size)
- av_log(NULL, AV_LOG_ERROR, " VQA video: decode_format80 problem: decode finished with dest_index (%d) < dest_size (%d)\n",
+ if (dest_index < dest_size) {
+ av_log(s->avctx, AV_LOG_ERROR, "decode_format80 problem: decode finished with dest_index (%d) < dest_size (%d)\n",
dest_index, dest_size);
+ memset(dest + dest_index, 0, dest_size - dest_index);
+ }
return 0; // let's display what we decoded anyway
}
@@ -377,7 +378,7 @@ static int vqa_decode_chunk(VqaContext *s, AVFrame *frame)
break;
default:
- av_log(s->avctx, AV_LOG_ERROR, " VQA video: Found unknown chunk type: %c%c%c%c (%08X)\n",
+ av_log(s->avctx, AV_LOG_ERROR, "Found unknown chunk type: %c%c%c%c (%08X)\n",
(chunk_type >> 24) & 0xFF,
(chunk_type >> 16) & 0xFF,
(chunk_type >> 8) & 0xFF,
@@ -394,7 +395,7 @@ static int vqa_decode_chunk(VqaContext *s, AVFrame *frame)
if ((cpl0_chunk != -1) && (cplz_chunk != -1)) {
/* a chunk should not have both chunk types */
- av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: found both CPL0 and CPLZ chunks\n");
+ av_log(s->avctx, AV_LOG_ERROR, "problem: found both CPL0 and CPLZ chunks\n");
return AVERROR_INVALIDDATA;
}
@@ -412,7 +413,7 @@ static int vqa_decode_chunk(VqaContext *s, AVFrame *frame)
chunk_size = bytestream2_get_be32(&s->gb);
/* sanity check the palette size */
if (chunk_size / 3 > 256 || chunk_size > bytestream2_get_bytes_left(&s->gb)) {
- av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: found a palette chunk with %d colors\n",
+ av_log(s->avctx, AV_LOG_ERROR, "problem: found a palette chunk with %d colors\n",
chunk_size / 3);
return AVERROR_INVALIDDATA;
}
@@ -421,7 +422,8 @@ static int vqa_decode_chunk(VqaContext *s, AVFrame *frame)
r = bytestream2_get_byteu(&s->gb) * 4;
g = bytestream2_get_byteu(&s->gb) * 4;
b = bytestream2_get_byteu(&s->gb) * 4;
- s->palette[i] = (r << 16) | (g << 8) | (b);
+ s->palette[i] = 0xFFU << 24 | r << 16 | g << 8 | b;
+ s->palette[i] |= s->palette[i] >> 6 & 0x30303;
}
}
@@ -429,7 +431,7 @@ static int vqa_decode_chunk(VqaContext *s, AVFrame *frame)
if ((cbf0_chunk != -1) && (cbfz_chunk != -1)) {
/* a chunk should not have both chunk types */
- av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: found both CBF0 and CBFZ chunks\n");
+ av_log(s->avctx, AV_LOG_ERROR, "problem: found both CBF0 and CBFZ chunks\n");
return AVERROR_INVALIDDATA;
}
@@ -438,7 +440,7 @@ static int vqa_decode_chunk(VqaContext *s, AVFrame *frame)
bytestream2_seek(&s->gb, cbfz_chunk, SEEK_SET);
chunk_size = bytestream2_get_be32(&s->gb);
- if ((res = decode_format80(&s->gb, chunk_size, s->codebook,
+ if ((res = decode_format80(s, chunk_size, s->codebook,
s->codebook_size, 0)) < 0)
return res;
}
@@ -450,7 +452,7 @@ static int vqa_decode_chunk(VqaContext *s, AVFrame *frame)
chunk_size = bytestream2_get_be32(&s->gb);
/* sanity check the full codebook size */
if (chunk_size > MAX_CODEBOOK_SIZE) {
- av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: CBF0 chunk too large (0x%X bytes)\n",
+ av_log(s->avctx, AV_LOG_ERROR, "problem: CBF0 chunk too large (0x%X bytes)\n",
chunk_size);
return AVERROR_INVALIDDATA;
}
@@ -462,13 +464,13 @@ static int vqa_decode_chunk(VqaContext *s, AVFrame *frame)
if (vptz_chunk == -1) {
/* something is wrong if there is no VPTZ chunk */
- av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: no VPTZ chunk found\n");
+ av_log(s->avctx, AV_LOG_ERROR, "problem: no VPTZ chunk found\n");
return AVERROR_INVALIDDATA;
}
bytestream2_seek(&s->gb, vptz_chunk, SEEK_SET);
chunk_size = bytestream2_get_be32(&s->gb);
- if ((res = decode_format80(&s->gb, chunk_size,
+ if ((res = decode_format80(s, chunk_size,
s->decode_buffer, s->decode_buffer_size, 1)) < 0)
return res;
@@ -531,7 +533,7 @@ static int vqa_decode_chunk(VqaContext *s, AVFrame *frame)
/* handle partial codebook */
if ((cbp0_chunk != -1) && (cbpz_chunk != -1)) {
/* a chunk should not have both chunk types */
- av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: found both CBP0 and CBPZ chunks\n");
+ av_log(s->avctx, AV_LOG_ERROR, "problem: found both CBP0 and CBPZ chunks\n");
return AVERROR_INVALIDDATA;
}
@@ -552,7 +554,7 @@ static int vqa_decode_chunk(VqaContext *s, AVFrame *frame)
s->next_codebook_buffer_index += chunk_size;
s->partial_countdown--;
- if (s->partial_countdown == 0) {
+ if (s->partial_countdown <= 0) {
/* time to replace codebook */
memcpy(s->codebook, s->next_codebook_buffer,
@@ -581,12 +583,10 @@ static int vqa_decode_chunk(VqaContext *s, AVFrame *frame)
s->next_codebook_buffer_index += chunk_size;
s->partial_countdown--;
- if (s->partial_countdown == 0) {
- GetByteContext gb;
-
- bytestream2_init(&gb, s->next_codebook_buffer, s->next_codebook_buffer_index);
+ if (s->partial_countdown <= 0) {
+ bytestream2_init(&s->gb, s->next_codebook_buffer, s->next_codebook_buffer_index);
/* decompress codebook */
- if ((res = decode_format80(&gb, s->next_codebook_buffer_index,
+ if ((res = decode_format80(s, s->next_codebook_buffer_index,
s->codebook, s->codebook_size, 0)) < 0)
return res;
@@ -607,10 +607,8 @@ static int vqa_decode_frame(AVCodecContext *avctx,
AVFrame *frame = data;
int res;
- if ((res = ff_get_buffer(avctx, frame, 0)) < 0) {
- av_log(s->avctx, AV_LOG_ERROR, " VQA Video: get_buffer() failed\n");
+ if ((res = ff_get_buffer(avctx, frame, 0)) < 0)
return res;
- }
bytestream2_init(&s->gb, avpkt->data, avpkt->size);
if ((res = vqa_decode_chunk(s, frame)) < 0)
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 14:23:59 +0000