* Electronic Arts TGQ Video Decoder
* Copyright (c) 2007-2008 Peter Ross <pross@xvid.org>
*
- * 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
}
}
-static void tgq_decode_mb(TgqContext *s, int mb_y, int mb_x){
+/**
+ * @return <0 on error
+ */
+static int tgq_decode_mb(TgqContext *s, int mb_y, int mb_x){
int mode;
int i;
int8_t dc[6];
mode = bytestream2_get_byte(&s->gb);
if (mode>12) {
GetBitContext gb;
- init_get_bits(&gb, s->gb.buffer, FFMIN(s->gb.buffer_end - s->gb.buffer, mode) * 8);
+ init_get_bits(&gb, s->gb.buffer, FFMIN(bytestream2_get_bytes_left(&s->gb), mode) * 8);
for(i=0; i<6; i++)
tgq_decode_block(s, s->block[i], &gb);
tgq_idct_put_mb(s, s->block, mb_x, mb_y);
}
}else{
av_log(s->avctx, AV_LOG_ERROR, "unsupported mb mode %i\n", mode);
+ return -1;
}
tgq_idct_put_mb_dconly(s, mb_x, mb_y, dc);
}
+ return 0;
}
static void tgq_calculate_qtable(TgqContext *s, int quant){
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
TgqContext *s = avctx->priv_data;
- int x,y;
+ int x, y, ret;
- int big_endian = AV_RL32(&buf[4]) > 0x000FFFFF;
+ int big_endian;
if (buf_size < 16) {
av_log(avctx, AV_LOG_WARNING, "truncated header\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
+ big_endian = AV_RL32(&buf[4]) > 0x000FFFFF;
bytestream2_init(&s->gb, buf + 8, buf_size - 8);
if (big_endian) {
s->width = bytestream2_get_be16u(&s->gb);
s->frame.key_frame = 1;
s->frame.pict_type = AV_PICTURE_TYPE_I;
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID;
- if (ff_get_buffer(avctx, &s->frame)) {
+ if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
+ return ret;
}
}
for (y = 0; y < FFALIGN(avctx->height, 16) >> 4; y++)
for (x = 0; x < FFALIGN(avctx->width, 16) >> 4; x++)
- tgq_decode_mb(s, y, x);
+ if (tgq_decode_mb(s, y, x) < 0)
+ return AVERROR_INVALIDDATA;
*got_frame = 1;
*(AVFrame*)data = s->frame;
* Electronic Arts TGV Video Decoder
* Copyright (c) 2007-2008 Peter Ross
*
- * 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
int num_blocks_packed; ///< current length of block_codebook
} TgvContext;
- static av_cold int tgv_decode_init(AVCodecContext *avctx){
+ static av_cold int tgv_decode_init(AVCodecContext *avctx)
+ {
TgvContext *s = avctx->priv_data;
- s->avctx = avctx;
+ s->avctx = avctx;
avctx->time_base = (AVRational){1, 15};
- avctx->pix_fmt = AV_PIX_FMT_PAL8;
+ avctx->pix_fmt = AV_PIX_FMT_PAL8;
+ avcodec_get_frame_defaults(&s->frame);
+ avcodec_get_frame_defaults(&s->last_frame);
return 0;
}
* Unpack buffer
* @return 0 on success, -1 on critical buffer underflow
*/
- static int unpack(const uint8_t *src, const uint8_t *src_end, unsigned char *dst, int width, int height) {
+ static int unpack(const uint8_t *src, const uint8_t *src_end,
+ unsigned char *dst, int width, int height)
+ {
unsigned char *dst_end = dst + width*height;
int size, size1, size2, offset, run;
unsigned char *dst_start = dst;
else
src += 2;
- if (src + 3 > src_end)
+ if (src_end - src < 3)
return AVERROR_INVALIDDATA;
size = AV_RB24(src);
src += 3;
- while(size>0 && src<src_end) {
+ while (size > 0 && src < src_end) {
/* determine size1 and size2 */
size1 = (src[0] & 3);
- if ( src[0] & 0x80 ) { // 1
+ if (src[0] & 0x80) { // 1
if (src[0] & 0x40 ) { // 11
- if ( src[0] & 0x20 ) { // 111
- if ( src[0] < 0xFC ) // !(111111)
+ if (src[0] & 0x20) { // 111
+ if (src[0] < 0xFC) // !(111111)
size1 = (((src[0] & 31) + 1) << 2);
src++;
size2 = 0;
} else { // 110
offset = ((src[0] & 0x10) << 12) + AV_RB16(&src[1]) + 1;
- size2 = ((src[0] & 0xC) << 6) + src[3] + 5;
- src += 4;
+ size2 = ((src[0] & 0xC) << 6) + src[3] + 5;
+ src += 4;
}
} else { // 10
- size1 = ( ( src[1] & 0xC0) >> 6 );
+ size1 = ((src[1] & 0xC0) >> 6);
offset = (AV_RB16(&src[1]) & 0x3FFF) + 1;
- size2 = (src[0] & 0x3F) + 4;
- src += 3;
+ size2 = (src[0] & 0x3F) + 4;
+ src += 3;
}
} else { // 0
offset = ((src[0] & 0x60) << 3) + src[1] + 1;
- size2 = ((src[0] & 0x1C) >> 2) + 3;
- src += 2;
+ size2 = ((src[0] & 0x1C) >> 2) + 3;
+ src += 2;
}
/* fetch strip from src */
- if (size1>src_end-src)
+ if (size1 > src_end - src)
break;
- if (size1>0) {
+ if (size1 > 0) {
size -= size1;
- run = FFMIN(size1, dst_end-dst);
+ run = FFMIN(size1, dst_end - dst);
memcpy(dst, src, run);
dst += run;
src += run;
}
- if (size2>0) {
- if (dst-dst_start<offset)
+ if (size2 > 0) {
+ if (dst - dst_start < offset)
return 0;
size -= size2;
- run = FFMIN(size2, dst_end-dst);
+ run = FFMIN(size2, dst_end - dst);
av_memcpy_backptr(dst, offset, run);
dst += run;
}
* Decode inter-frame
* @return 0 on success, -1 on critical buffer underflow
*/
- static int tgv_decode_inter(TgvContext * s, const uint8_t *buf, const uint8_t *buf_end){
+ static int tgv_decode_inter(TgvContext *s, const uint8_t *buf,
+ const uint8_t *buf_end)
+ {
int num_mvs;
int num_blocks_raw;
int num_blocks_packed;
int mvbits;
const unsigned char *blocks_raw;
- if (buf + 12 > buf_end)
+ if(buf_end - buf < 12)
return AVERROR_INVALIDDATA;
num_mvs = AV_RL16(&buf[0]);
}
/* read motion vectors */
- mvbits = (num_mvs*2*10+31) & ~31;
+ mvbits = (num_mvs * 2 * 10 + 31) & ~31;
- if (buf_end - buf < (mvbits>>3)+16*num_blocks_raw+8*num_blocks_packed)
- if (buf + (mvbits >> 3) + 16 * num_blocks_raw + 8 * num_blocks_packed > buf_end)
++ if (buf_end - buf < (mvbits>>3) + 16*num_blocks_raw + 8*num_blocks_packed)
return AVERROR_INVALIDDATA;
init_get_bits(&gb, buf, mvbits);
- for (i=0; i<num_mvs; i++) {
+ for (i = 0; i < num_mvs; i++) {
s->mv_codebook[i][0] = get_sbits(&gb, 10);
s->mv_codebook[i][1] = get_sbits(&gb, 10);
}
- buf += mvbits>>3;
+ buf += mvbits >> 3;
/* note ptr to uncompressed blocks */
blocks_raw = buf;
- buf += num_blocks_raw*16;
+ buf += num_blocks_raw * 16;
/* read compressed blocks */
- init_get_bits(&gb, buf, (buf_end-buf)<<3);
- for (i=0; i<num_blocks_packed; i++) {
+ init_get_bits(&gb, buf, (buf_end - buf) << 3);
+ for (i = 0; i < num_blocks_packed; i++) {
int tmp[4];
- for(j=0; j<4; j++)
+ for (j = 0; j < 4; j++)
tmp[j] = get_bits(&gb, 8);
- for(j=0; j<16; j++)
+ for (j = 0; j < 16; j++)
s->block_codebook[i][15-j] = tmp[get_bits(&gb, 2)];
}
if (get_bits_left(&gb) < vector_bits *
- (s->avctx->height/4) * (s->avctx->width/4))
+ (s->avctx->height / 4) * (s->avctx->width / 4))
return AVERROR_INVALIDDATA;
/* read vectors and build frame */
- for(y=0; y<s->avctx->height/4; y++)
- for(x=0; x<s->avctx->width/4; x++) {
- unsigned int vector = get_bits(&gb, vector_bits);
- const unsigned char *src;
- int src_stride;
-
- if (vector < num_mvs) {
- int mx = x * 4 + s->mv_codebook[vector][0];
- int my = y * 4 + s->mv_codebook[vector][1];
-
- if ( mx < 0 || mx + 4 > s->avctx->width
- || my < 0 || my + 4 > s->avctx->height) {
- av_log(s->avctx, AV_LOG_ERROR, "MV %d %d out of picture\n", mx, my);
- continue;
- }
+ for (y = 0; y < s->avctx->height / 4; y++)
+ for (x = 0; x < s->avctx->width / 4; x++) {
+ unsigned int vector = get_bits(&gb, vector_bits);
+ const unsigned char *src;
+ int src_stride;
+
+ if (vector < num_mvs) {
+ int mx = x * 4 + s->mv_codebook[vector][0];
+ int my = y * 4 + s->mv_codebook[vector][1];
+
+ if (mx < 0 || mx + 4 > s->avctx->width ||
- my < 0 || my + 4 > s->avctx->height)
++ my < 0 || my + 4 > s->avctx->height) {
++ av_log(s->avctx, AV_LOG_ERROR, "MV %d %d out of picture\n", mx, my);
+ continue;
++ }
- src = s->last_frame.data[0] + mx + my * s->last_frame.linesize[0];
- src_stride = s->last_frame.linesize[0];
- }else{
- int offset = vector - num_mvs;
- if (offset<num_blocks_raw)
- src = blocks_raw + 16*offset;
- else if (offset-num_blocks_raw<num_blocks_packed)
- src = s->block_codebook[offset-num_blocks_raw];
- else
- continue;
- src_stride = 4;
- }
+ src = s->last_frame.data[0] + mx + my * s->last_frame.linesize[0];
+ src_stride = s->last_frame.linesize[0];
+ } else {
+ int offset = vector - num_mvs;
+ if (offset < num_blocks_raw)
+ src = blocks_raw + 16*offset;
+ else if (offset - num_blocks_raw < num_blocks_packed)
+ src = s->block_codebook[offset - num_blocks_raw];
+ else
+ continue;
+ src_stride = 4;
+ }
- for(j=0; j<4; j++)
- for(i=0; i<4; i++)
- s->frame.data[0][ (y*4+j)*s->frame.linesize[0] + (x*4+i) ] =
- src[j*src_stride + i];
+ for (j = 0; j < 4; j++)
+ for (i = 0; i < 4; i++)
+ s->frame.data[0][(y * 4 + j) * s->frame.linesize[0] + (x * 4 + i)] =
+ src[j * src_stride + i];
}
return 0;
void *data, int *got_frame,
AVPacket *avpkt)
{
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- TgvContext *s = avctx->priv_data;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ TgvContext *s = avctx->priv_data;
const uint8_t *buf_end = buf + buf_size;
int chunk_type, ret;
+ if (buf_end - buf < EA_PREAMBLE_SIZE)
+ return AVERROR_INVALIDDATA;
+
chunk_type = AV_RL32(&buf[0]);
- buf += EA_PREAMBLE_SIZE;
+ buf += EA_PREAMBLE_SIZE;
- if (chunk_type==kVGT_TAG) {
+ if (chunk_type == kVGT_TAG) {
int pal_count, i;
- if (buf + 12 > buf_end) {
+ if(buf_end - buf < 12) {
av_log(avctx, AV_LOG_WARNING, "truncated header\n");
return AVERROR_INVALIDDATA;
}
s->width = AV_RL16(&buf[0]);
s->height = AV_RL16(&buf[2]);
- if (s->avctx->width!=s->width || s->avctx->height!=s->height) {
+ if (s->avctx->width != s->width || s->avctx->height != s->height) {
avcodec_set_dimensions(s->avctx, s->width, s->height);
cond_release_buffer(&s->frame);
cond_release_buffer(&s->last_frame);
pal_count = AV_RL16(&buf[6]);
buf += 12;
- for(i=0; i<pal_count && i<AVPALETTE_COUNT && buf_end - buf >= 3; i++) {
- for (i = 0; i < pal_count && i < AVPALETTE_COUNT && buf + 2 < buf_end; i++) {
- s->palette[i] = AV_RB24(buf);
++ for(i = 0; i < pal_count && i < AVPALETTE_COUNT && buf_end - buf >= 3; i++) {
+ s->palette[i] = 0xFFU << 24 | AV_RB24(buf);
buf += 3;
}
}
/* shuffle */
FFSWAP(AVFrame, s->frame, s->last_frame);
if (!s->frame.data[0]) {
- s->frame.reference = 1;
+ s->frame.reference = 3;
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID;
s->frame.linesize[0] = s->width;
}
memcpy(s->frame.data[1], s->palette, AVPALETTE_SIZE);
- if(chunk_type==kVGT_TAG) {
+ if (chunk_type == kVGT_TAG) {
s->frame.key_frame = 1;
s->frame.pict_type = AV_PICTURE_TYPE_I;
- if (unpack(buf, buf_end, s->frame.data[0], s->avctx->width, s->avctx->height)<0) {
+ if (unpack(buf, buf_end, s->frame.data[0], s->avctx->width, s->avctx->height) < 0) {
av_log(avctx, AV_LOG_WARNING, "truncated intra frame\n");
return AVERROR_INVALIDDATA;
}
- }else{
+ } else {
if (!s->last_frame.data[0]) {
av_log(avctx, AV_LOG_WARNING, "inter frame without corresponding intra frame\n");
return buf_size;
}
s->frame.key_frame = 0;
s->frame.pict_type = AV_PICTURE_TYPE_P;
- if (tgv_decode_inter(s, buf, buf_end)<0) {
+ if (tgv_decode_inter(s, buf, buf_end) < 0) {
av_log(avctx, AV_LOG_WARNING, "truncated inter frame\n");
return AVERROR_INVALIDDATA;
}