/*
* Fraps FPS1 decoder
* Copyright (c) 2005 Roine Gustafsson
+ * Copyright (c) 2006 Konstantin Shishkov
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * Libav 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * Libav 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 this library; if not, write to the Free Software
+ * License along with Libav; 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
*
- * Only decodes version 0 and 1 files.
* Codec algorithm for version 0 is taken from Transcode <www.transcoding.org>
*
- * Version 2 files, which are the most commonly found Fraps files, cannot be
- * decoded yet.
+ * Version 2 files support by Konstantin Shishkov
*/
#include "avcodec.h"
+#include "bitstream.h"
+#include "huffman.h"
+#include "bytestream.h"
+#include "bswapdsp.h"
+#include "internal.h"
#define FPS_TAG MKTAG('F', 'P', 'S', 'x')
+#define VLC_BITS 11
/**
* local variable storage
*/
-typedef struct FrapsContext{
+typedef struct FrapsContext {
AVCodecContext *avctx;
- AVFrame frame;
+ BswapDSPContext bdsp;
+ AVFrame *frame;
+ uint8_t *tmpbuf;
+ int tmpbuf_size;
} 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 */
+ avctx->pix_fmt = AV_PIX_FMT_NONE; /* set in decode_frame */
+
+ s->avctx = avctx;
+ s->tmpbuf = NULL;
- s->avctx = avctx;
- s->frame.data[0] = NULL;
+ s->frame = av_frame_alloc();
+ if (!s->frame)
+ return AVERROR(ENOMEM);
+
+ ff_bswapdsp_init(&s->bdsp);
return 0;
}
+/**
+ * Comparator - our nodes should ascend by count
+ * but with preserved symbol order
+ */
+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;
+}
/**
- * decode a frame
- * @param avctx codec context
- * @param data output AVFrame
- * @param data_size size of output data or 0 if no picture is returned
- * @param buf input data frame
- * @param buf_size size of input data frame
- * @return number of consumed bytes on success or negative if decode fails
+ * decode Fraps v2 packed plane
*/
+static int fraps2_decode_plane(FrapsContext *s, uint8_t *dst, int stride, int w,
+ int h, const uint8_t *src, int size, int Uoff,
+ const int step)
+{
+ int i, j, ret;
+ BitstreamContext bc;
+ VLC vlc;
+ Node nodes[512];
+
+ for (i = 0; i < 256; i++)
+ nodes[i].count = bytestream_get_le32(&src);
+ size -= 1024;
+ if ((ret = ff_huff_build_tree(s->avctx, &vlc, 256, VLC_BITS,
+ nodes, huff_cmp,
+ FF_HUFFMAN_FLAG_ZERO_COUNT)) < 0)
+ return ret;
+ /* we have built Huffman table and are ready to decode plane */
+
+ /* convert bits so they may be used by standard bitreader */
+ s->bdsp.bswap_buf((uint32_t *) s->tmpbuf,
+ (const uint32_t *) src, size >> 2);
+
+ bitstream_init8(&bc, s->tmpbuf, size);
+ for (j = 0; j < h; j++) {
+ for (i = 0; i < w*step; i += step) {
+ dst[i] = bitstream_read_vlc(&bc, vlc.table, VLC_BITS, 3);
+ /* lines are stored as deltas between previous lines
+ * and we need to add 0x80 to the first lines of chroma planes
+ */
+ if (j)
+ dst[i] += dst[i - stride];
+ else if (Uoff)
+ dst[i] += 0x80;
+ if (bitstream_bits_left(&bc) < 0) {
+ ff_free_vlc(&vlc);
+ return AVERROR_INVALIDDATA;
+ }
+ }
+ dst += stride;
+ }
+ ff_free_vlc(&vlc);
+ return 0;
+}
+
static int decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ void *data, int *got_frame,
+ AVPacket *avpkt)
{
FrapsContext * const s = avctx->priv_data;
- AVFrame *frame = data;
- AVFrame * const f = (AVFrame*)&s->frame;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ AVFrame *frame = data;
+ AVFrame * const f = 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, j, ret, is_chroma, planes;
+ enum AVPixelFormat pix_fmt;
+ int prev_pic_bit, expected_size;
+
+ if (buf_size < 4) {
+ av_log(avctx, AV_LOG_ERROR, "Packet is too short\n");
+ return AVERROR_INVALIDDATA;
+ }
-
- header = LE_32(buf);
- version = header & 0xff;
+ header = AV_RL32(buf);
+ version = header & 0xff;
header_size = (header & (1<<30))? 8 : 4; /* bit 30 means pad to 8 bytes */
+ prev_pic_bit = header & (1U << 31); /* bit 31 means same as previous pic */
- if (version > 1) {
- av_log(avctx, AV_LOG_ERROR,
- "This file is encoded with Fraps version %d. " \
- "This codec can only decode version 0 and 1.\n", version);
- return -1;
+ if (version > 5) {
+ avpriv_report_missing_feature(avctx, "Fraps version %u", version);
+ return AVERROR_PATCHWELCOME;
}
- buf+=4;
+ buf += 4;
if (header_size == 8)
- buf+=4;
+ buf += 4;
- switch(version) {
+ pix_fmt = version & 1 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_YUVJ420P;
+ if (avctx->pix_fmt != pix_fmt && f->data[0]) {
+ av_frame_unref(f);
+ }
+ avctx->pix_fmt = pix_fmt;
+ avctx->color_range = version & 1 ? AVCOL_RANGE_UNSPECIFIED
+ : AVCOL_RANGE_JPEG;
+
+ expected_size = header_size;
+
+ switch (version) {
case 0:
default:
/* Fraps v0 is a reordered YUV420 */
- avctx->pix_fmt = PIX_FMT_YUV420P;
-
- if ( (buf_size != avctx->width*avctx->height*3/2+header_size) &&
- (buf_size != header_size) ) {
+ if (!prev_pic_bit)
+ expected_size += avctx->width * avctx->height * 3 / 2;
+ if (buf_size != expected_size) {
av_log(avctx, AV_LOG_ERROR,
"Invalid frame length %d (should be %d)\n",
- buf_size, avctx->width*avctx->height*3/2+header_size);
- return -1;
+ buf_size, expected_size);
+ return AVERROR_INVALIDDATA;
}
- if (( (avctx->width % 8) != 0) || ( (avctx->height % 2) != 0 )) {
+ if (((avctx->width % 8) != 0) || ((avctx->height % 2) != 0)) {
av_log(avctx, AV_LOG_ERROR, "Invalid frame size %dx%d\n",
avctx->width, avctx->height);
- return -1;
+ return AVERROR_INVALIDDATA;
}
- f->reference = 1;
- f->buffer_hints = FF_BUFFER_HINTS_VALID |
- FF_BUFFER_HINTS_PRESERVE |
- FF_BUFFER_HINTS_REUSABLE;
- if (avctx->reget_buffer(avctx, f)) {
+ if ((ret = ff_reget_buffer(avctx, f)) < 0) {
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
- return -1;
- }
- /* bit 31 means same as previous pic */
- f->pict_type = (header & (1<<31))? FF_P_TYPE : FF_I_TYPE;
- f->key_frame = f->pict_type == FF_I_TYPE;
-
- if (f->pict_type == FF_I_TYPE) {
- buf32=(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] ];
- cr=(uint32_t*)&f->data[1][ y*f->linesize[1] ];
- cb=(uint32_t*)&f->data[2][ y*f->linesize[2] ];
- for(x=0; x<avctx->width; x+=8){
+ return ret;
+ }
+ f->pict_type = prev_pic_bit ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
+ f->key_frame = f->pict_type == AV_PICTURE_TYPE_I;
+
+ if (f->pict_type == AV_PICTURE_TYPE_I) {
+ 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]];
+ cr = (uint32_t*)&f->data[1][ y * f->linesize[1]];
+ cb = (uint32_t*)&f->data[2][ y * f->linesize[2]];
+ for (x = 0; x < avctx->width; x += 8) {
*(luma1++) = *(buf32++);
*(luma1++) = *(buf32++);
*(luma2++) = *(buf32++);
case 1:
/* Fraps v1 is an upside-down BGR24 */
- avctx->pix_fmt = PIX_FMT_BGR24;
-
- if ( (buf_size != avctx->width*avctx->height*3+header_size) &&
- (buf_size != header_size) ) {
+ if (!prev_pic_bit)
+ expected_size += avctx->width * avctx->height * 3;
+ if (buf_size != expected_size) {
av_log(avctx, AV_LOG_ERROR,
"Invalid frame length %d (should be %d)\n",
- buf_size, avctx->width*avctx->height*3+header_size);
- return -1;
+ buf_size, expected_size);
+ return AVERROR_INVALIDDATA;
}
- f->reference = 1;
- f->buffer_hints = FF_BUFFER_HINTS_VALID |
- FF_BUFFER_HINTS_PRESERVE |
- FF_BUFFER_HINTS_REUSABLE;
- if (avctx->reget_buffer(avctx, f)) {
+ if ((ret = ff_reget_buffer(avctx, f)) < 0) {
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
- return -1;
+ return ret;
}
- /* bit 31 means same as previous pic */
- f->pict_type = (header & (1<<31))? FF_P_TYPE : FF_I_TYPE;
- f->key_frame = f->pict_type == FF_I_TYPE;
-
- if (f->pict_type == FF_I_TYPE) {
- 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]);
+ f->pict_type = prev_pic_bit ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
+ f->key_frame = f->pict_type == AV_PICTURE_TYPE_I;
+
+ if (f->pict_type == AV_PICTURE_TYPE_I) {
+ for (y = 0; y<avctx->height; y++)
+ memcpy(&f->data[0][(avctx->height - y - 1) * f->linesize[0]],
+ &buf[y * avctx->width * 3],
+ 3 * avctx->width);
}
break;
case 2:
+ case 4:
/**
- * Fraps v2 sub-header description. All numbers are little-endian:
- * (this is all guesswork)
- *
- * 0: DWORD 'FPSx'
- * 4: DWORD 0x00000010 unknown, perhaps flags
- * 8: DWORD off_2 offset to plane 2
- * 12: DWORD off_3 offset to plane 3
- * 16: 256xDWORD freqtbl_1 frequency table for plane 1
- * 1040: plane_1
- * ...
- * off_2: 256xDWORD freqtbl_2 frequency table for plane 2
- * plane_2
- * ...
- * off_3: 256xDWORD freqtbl_3 frequency table for plane 3
- * plane_3
+ * Fraps v2 is Huffman-coded YUV420 planes
+ * Fraps v4 is virtually the same
*/
- if ((BE_32(buf) != FPS_TAG)||(buf_size < (3*1024 + 8))) {
+ planes = 3;
+ if ((ret = ff_reget_buffer(avctx, f)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+ return ret;
+ }
+ /* skip frame */
+ if (buf_size == 8) {
+ f->pict_type = AV_PICTURE_TYPE_P;
+ f->key_frame = 0;
+ break;
+ }
+ f->pict_type = AV_PICTURE_TYPE_I;
+ 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;
+ return AVERROR_INVALIDDATA;
+ }
+ 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 AVERROR_INVALIDDATA;
+ }
+ }
+ offs[planes] = buf_size;
+ for (i = 0; i < planes; i++) {
+ is_chroma = !!i;
+ av_fast_padded_malloc(&s->tmpbuf, &s->tmpbuf_size,
+ offs[i + 1] - offs[i] - 1024);
+ if (!s->tmpbuf)
+ return AVERROR(ENOMEM);
+ if ((ret = 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, 1)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Error decoding plane %i\n", i);
+ return ret;
+ }
+ }
+ break;
+ case 3:
+ case 5:
+ /* Virtually the same as version 4, but is for RGB24 */
+ planes = 3;
+ if ((ret = ff_reget_buffer(avctx, f)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+ return ret;
+ }
+ /* skip frame */
+ if (buf_size == 8) {
+ f->pict_type = AV_PICTURE_TYPE_P;
+ f->key_frame = 0;
+ break;
+ }
+ f->pict_type = AV_PICTURE_TYPE_I;
+ 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 AVERROR_INVALIDDATA;
+ }
+ 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 AVERROR_INVALIDDATA;
+ }
+ }
+ offs[planes] = buf_size;
+ for (i = 0; i < planes; i++) {
+ av_fast_padded_malloc(&s->tmpbuf, &s->tmpbuf_size,
+ offs[i + 1] - offs[i] - 1024);
+ if (!s->tmpbuf)
+ return AVERROR(ENOMEM);
+ if ((ret = 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 ret;
+ }
+ }
+ // 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]];
+ }
}
-
- /* NOT FINISHED */
-
break;
}
- *frame = *f;
- *data_size = sizeof(AVFrame);
+ if ((ret = av_frame_ref(frame, f)) < 0)
+ return ret;
+ *got_frame = 1;
return buf_size;
}
* @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;
- if (s->frame.data[0])
- avctx->release_buffer(avctx, &s->frame);
+ av_frame_free(&s->frame);
+ av_freep(&s->tmpbuf);
return 0;
}
-AVCodec fraps_decoder = {
- "fraps",
- CODEC_TYPE_VIDEO,
- CODEC_ID_FRAPS,
- sizeof(FrapsContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_fraps_decoder = {
+ .name = "fraps",
+ .long_name = NULL_IF_CONFIG_SMALL("Fraps"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_FRAPS,
+ .priv_data_size = sizeof(FrapsContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .capabilities = AV_CODEC_CAP_DR1,
+ .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
projects / ffmpeg / blobdiff