* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
/**
* @author Roine Gustafsson <roine at users sf net>
* @author Konstantin Shishkov
*
- * Only decodes version 0 and 1 files.
* Codec algorithm for version 0 is taken from Transcode <www.transcoding.org>
*
* Version 2 files support by Konstantin Shishkov
FrapsContext * const s = avctx->priv_data;
avctx->coded_frame = (AVFrame*)&s->frame;
- avctx->has_b_frames = 0;
avctx->pix_fmt= PIX_FMT_NONE; /* set in decode_frame */
s->avctx = avctx;
* Comparator - our nodes should ascend by count
* but with preserved symbol order
*/
-static int huff_cmp(const Node *a, const Node *b){
+static int huff_cmp(const void *va, const void *vb){
+ const Node *a = va, *b = vb;
return (a->count - b->count)*256 + a->sym - b->sym;
}
-static void get_tree_codes(uint32_t *bits, int16_t *lens, Node *nodes, int node, uint32_t pfx, int pl)
+static void get_tree_codes(uint32_t *bits, int16_t *lens, uint8_t *xlat, Node *nodes, int node, uint32_t pfx, int pl, int *pos)
{
int s;
s = nodes[node].sym;
- if(s != HNODE){
- bits[s] = pfx;
- lens[s] = pl;
+ if(s != HNODE || !nodes[node].count){
+ bits[*pos] = pfx;
+ lens[*pos] = pl;
+ xlat[*pos] = s;
+ (*pos)++;
}else{
pfx <<= 1;
pl++;
- get_tree_codes(bits, lens, nodes, nodes[node].n0, pfx, pl);
+ get_tree_codes(bits, lens, xlat, nodes, nodes[node].n0, pfx, pl, pos);
pfx |= 1;
- get_tree_codes(bits, lens, nodes, nodes[node].n0+1, pfx, pl);
+ get_tree_codes(bits, lens, xlat, nodes, nodes[node].n0+1, pfx, pl, pos);
}
}
-static int build_huff_tree(VLC *vlc, Node *nodes)
+static int build_huff_tree(VLC *vlc, Node *nodes, uint8_t *xlat)
{
uint32_t bits[256];
int16_t lens[256];
+ int pos = 0;
- get_tree_codes(bits, lens, nodes, 510, 0, 0);
- return init_vlc(vlc, 9, 256, lens, 2, 2, bits, 4, 4, 0);
+ get_tree_codes(bits, lens, xlat, nodes, 510, 0, 0, &pos);
+ return init_vlc(vlc, 9, pos, lens, 2, 2, bits, 4, 4, 0);
}
GetBitContext gb;
VLC vlc;
int64_t sum = 0;
+ uint8_t recode[256];
for(i = 0; i < 256; i++){
s->nodes[i].sym = i;
- s->nodes[i].count = LE_32(src);
+ s->nodes[i].count = AV_RL32(src);
s->nodes[i].n0 = -2;
+ if(s->nodes[i].count < 0) {
+ av_log(s->avctx, AV_LOG_ERROR, "Symbol count < 0\n");
+ return -1;
+ }
src += 4;
sum += s->nodes[i].count;
}
}
qsort(s->nodes, 256, sizeof(Node), huff_cmp);
cur_node = 256;
- // FIXME how it will handle nodes with zero count?
for(i = 0; i < 511; i += 2){
s->nodes[cur_node].sym = HNODE;
s->nodes[cur_node].count = s->nodes[i].count + s->nodes[i+1].count;
}
cur_node++;
}
- if(build_huff_tree(&vlc, s->nodes) < 0){
+ if(build_huff_tree(&vlc, s->nodes, recode) < 0){
av_log(s->avctx, AV_LOG_ERROR, "Error building tree\n");
return -1;
}
init_get_bits(&gb, s->tmpbuf, size * 8);
for(j = 0; j < h; j++){
for(i = 0; i < w; i++){
- dst[i] = get_vlc2(&gb, vlc.table, 9, 3);
+ dst[i] = recode[get_vlc2(&gb, vlc.table, 9, 3)];
/* lines are stored as deltas between previous lines
* and we need to add 0x80 to the first lines of chroma planes
*/
int i, is_chroma, planes;
- header = LE_32(buf);
+ header = AV_RL32(buf);
version = header & 0xff;
header_size = (header & (1<<30))? 8 : 4; /* bit 30 means pad to 8 bytes */
case 4:
/**
* Fraps v2 is Huffman-coded YUV420 planes
- * Fraps v4 is the same except it works in grayscale
+ * Fraps v4 is virtually the same
*/
- avctx->pix_fmt = (version == 2) ? PIX_FMT_YUV420P : PIX_FMT_GRAY8;
- planes = (version == 2) ? 3 : 1;
+ avctx->pix_fmt = PIX_FMT_YUV420P;
+ planes = 3;
f->reference = 1;
f->buffer_hints = FF_BUFFER_HINTS_VALID |
FF_BUFFER_HINTS_PRESERVE |
}
f->pict_type = FF_I_TYPE;
f->key_frame = 1;
- if ((LE_32(buf) != FPS_TAG)||(buf_size < (planes*1024 + 24))) {
+ if ((AV_RL32(buf) != FPS_TAG)||(buf_size < (planes*1024 + 24))) {
av_log(avctx, AV_LOG_ERROR, "Fraps: error in data stream\n");
return -1;
}
for(i = 0; i < planes; i++) {
- offs[i] = LE_32(buf + 4 + i * 4);
+ offs[i] = AV_RL32(buf + 4 + i * 4);
if(offs[i] >= buf_size || (i && offs[i] <= offs[i - 1] + 1024)) {
av_log(avctx, AV_LOG_ERROR, "Fraps: plane %i offset is out of bounds\n", i);
return -1;
offs[planes] = buf_size;
for(i = 0; i < planes; i++){
is_chroma = !!i;
- s->tmpbuf = av_realloc(s->tmpbuf, offs[i + 1] - offs[i] - 1024);
+ s->tmpbuf = av_realloc(s->tmpbuf, offs[i + 1] - offs[i] - 1024 + FF_INPUT_BUFFER_PADDING_SIZE);
if(fraps2_decode_plane(s, f->data[i], f->linesize[i], avctx->width >> is_chroma,
avctx->height >> is_chroma, buf + offs[i], offs[i + 1] - offs[i], is_chroma) < 0) {
av_log(avctx, AV_LOG_ERROR, "Error decoding plane %i\n", i);