* 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
- *
*/
/**
- * @file fraps.c
+ * @file
* Lossless Fraps 'FPS1' decoder
- * @author Roine Gustafsson <roine at users sf net>
+ * @author Roine Gustafsson (roine at users sf net)
* @author Konstantin Shishkov
*
* Codec algorithm for version 0 is taken from Transcode <www.transcoding.org>
*/
#include "avcodec.h"
-#include "bitstream.h"
+#include "get_bits.h"
+#include "huffman.h"
+#include "bytestream.h"
#include "dsputil.h"
#define FPS_TAG MKTAG('F', 'P', 'S', 'x')
-/* symbol for Huffman tree node */
-#define HNODE -1
-
-/**
- * Huffman node
- * FIXME one day this should belong to one general framework
- */
-typedef struct Node{
- int16_t sym;
- int16_t n0;
- int count;
-}Node;
-
/**
* local variable storage
*/
typedef struct FrapsContext{
AVCodecContext *avctx;
AVFrame frame;
- Node nodes[512];
uint8_t *tmpbuf;
DSPContext dsp;
} FrapsContext;
* @param avctx codec context
* @return 0 on success or negative if fails
*/
-static int decode_init(AVCodecContext *avctx)
+static av_cold int decode_init(AVCodecContext *avctx)
{
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;
- s->frame.data[0] = NULL;
s->tmpbuf = NULL;
dsputil_init(&s->dsp, 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)
-{
- int s;
-
- s = nodes[node].sym;
- if(s != HNODE){
- bits[s] = pfx;
- lens[s] = pl;
- }else{
- pfx <<= 1;
- pl++;
- get_tree_codes(bits, lens, nodes, nodes[node].n0, pfx, pl);
- pfx |= 1;
- get_tree_codes(bits, lens, nodes, nodes[node].n0+1, pfx, pl);
- }
-}
-
-static int build_huff_tree(VLC *vlc, Node *nodes)
-{
- uint32_t bits[256];
- int16_t lens[256];
-
- get_tree_codes(bits, lens, nodes, 510, 0, 0);
- return init_vlc(vlc, 9, 256, lens, 2, 2, bits, 4, 4, 0);
-}
-
-
/**
* decode Fraps v2 packed plane
*/
static int fraps2_decode_plane(FrapsContext *s, uint8_t *dst, int stride, int w,
- int h, uint8_t *src, int size, int Uoff)
+ int h, const uint8_t *src, int size, int Uoff,
+ const int step)
{
int i, j;
- int cur_node;
GetBitContext gb;
VLC vlc;
- int64_t sum = 0;
-
- for(i = 0; i < 256; i++){
- s->nodes[i].sym = i;
- s->nodes[i].count = LE_32(src);
- s->nodes[i].n0 = -2;
- src += 4;
- sum += s->nodes[i].count;
- }
- size -= 1024;
+ Node nodes[512];
- if(sum >> 31) {
- av_log(s->avctx, AV_LOG_ERROR, "Too high symbol frequencies. Tree construction is not possible\n");
- return -1;
- }
- 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;
- s->nodes[cur_node].n0 = i;
- for(j = cur_node; j > 0; j--){
- if(s->nodes[j].count >= s->nodes[j - 1].count) break;
- FFSWAP(Node, s->nodes[j], s->nodes[j - 1]);
- }
- cur_node++;
- }
- if(build_huff_tree(&vlc, s->nodes) < 0){
- av_log(s->avctx, AV_LOG_ERROR, "Error building tree\n");
+ for(i = 0; i < 256; i++)
+ nodes[i].count = bytestream_get_le32(&src);
+ size -= 1024;
+ if (ff_huff_build_tree(s->avctx, &vlc, 256, nodes, huff_cmp,
+ FF_HUFFMAN_FLAG_ZERO_COUNT) < 0)
return -1;
- }
/* we have built Huffman table and are ready to decode plane */
/* convert bits so they may be used by standard bitreader */
- s->dsp.bswap_buf(s->tmpbuf, src, size >> 2);
+ s->dsp.bswap_buf((uint32_t *)s->tmpbuf, (const uint32_t *)src, size >> 2);
init_get_bits(&gb, s->tmpbuf, size * 8);
for(j = 0; j < h; j++){
- for(i = 0; i < w; i++){
+ for(i = 0; i < w*step; i += step){
dst[i] = 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
*/
static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
FrapsContext * const s = avctx->priv_data;
AVFrame *frame = data;
AVFrame * const f = (AVFrame*)&s->frame;
uint32_t header;
unsigned int version,header_size;
unsigned int x, y;
- uint32_t *buf32;
+ const uint32_t *buf32;
uint32_t *luma1,*luma2,*cb,*cr;
uint32_t offs[4];
- int i, is_chroma, planes;
+ int i, j, 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 */
- if (version > 2 && version != 4) {
+ if (version > 5) {
av_log(avctx, AV_LOG_ERROR,
"This file is encoded with Fraps version %d. " \
- "This codec can only decode version 0, 1, 2 and 4.\n", version);
+ "This codec can only decode versions <= 5.\n", version);
return -1;
}
f->key_frame = f->pict_type == FF_I_TYPE;
if (f->pict_type == FF_I_TYPE) {
- buf32=(uint32_t*)buf;
+ buf32=(const uint32_t*)buf;
for(y=0; y<avctx->height/2; y++){
luma1=(uint32_t*)&f->data[0][ y*2*f->linesize[0] ];
luma2=(uint32_t*)&f->data[0][ (y*2+1)*f->linesize[0] ];
for(y=0; y<avctx->height; y++)
memcpy(&f->data[0][ (avctx->height-y)*f->linesize[0] ],
&buf[y*avctx->width*3],
- f->linesize[0]);
+ 3*avctx->width);
}
break;
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) {
+ avctx->height >> is_chroma, buf + offs[i], offs[i + 1] - offs[i], is_chroma, 1) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Error decoding plane %i\n", i);
+ return -1;
+ }
+ }
+ break;
+ case 3:
+ case 5:
+ /* Virtually the same as version 4, but is for RGB24 */
+ avctx->pix_fmt = PIX_FMT_BGR24;
+ planes = 3;
+ f->reference = 1;
+ f->buffer_hints = FF_BUFFER_HINTS_VALID |
+ FF_BUFFER_HINTS_PRESERVE |
+ FF_BUFFER_HINTS_REUSABLE;
+ if (avctx->reget_buffer(avctx, f)) {
+ av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+ return -1;
+ }
+ /* skip frame */
+ if(buf_size == 8) {
+ f->pict_type = FF_P_TYPE;
+ f->key_frame = 0;
+ break;
+ }
+ f->pict_type = FF_I_TYPE;
+ f->key_frame = 1;
+ 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] = 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++){
+ s->tmpbuf = av_realloc(s->tmpbuf, offs[i + 1] - offs[i] - 1024 + FF_INPUT_BUFFER_PADDING_SIZE);
+ if(fraps2_decode_plane(s, f->data[0] + i + (f->linesize[0] * (avctx->height - 1)), -f->linesize[0],
+ avctx->width, avctx->height, buf + offs[i], offs[i + 1] - offs[i], 0, 3) < 0) {
av_log(avctx, AV_LOG_ERROR, "Error decoding plane %i\n", i);
return -1;
}
}
+ // convert pseudo-YUV into real RGB
+ for(j = 0; j < avctx->height; j++){
+ for(i = 0; i < avctx->width; i++){
+ f->data[0][0 + i*3 + j*f->linesize[0]] += f->data[0][1 + i*3 + j*f->linesize[0]];
+ f->data[0][2 + i*3 + j*f->linesize[0]] += f->data[0][1 + i*3 + j*f->linesize[0]];
+ }
+ }
break;
}
* @param avctx codec context
* @return 0 on success or negative if fails
*/
-static int decode_end(AVCodecContext *avctx)
+static av_cold int decode_end(AVCodecContext *avctx)
{
FrapsContext *s = (FrapsContext*)avctx->priv_data;
AVCodec fraps_decoder = {
"fraps",
- CODEC_TYPE_VIDEO,
+ AVMEDIA_TYPE_VIDEO,
CODEC_ID_FRAPS,
sizeof(FrapsContext),
decode_init,
decode_end,
decode_frame,
CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Fraps"),
};
projects / ffmpeg / blobdiff