* Cinepak Video Decoder
* Copyright (C) 2003 the ffmpeg project
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * 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 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,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "avcodec.h"
#include "dsputil.h"
-#define PALETTE_COUNT 256
typedef struct {
uint8_t y0, y1, y2, y3;
AVCodecContext *avctx;
DSPContext dsp;
AVFrame frame;
- AVFrame prev_frame;
unsigned char *data;
int size;
int width, height;
- unsigned char palette[PALETTE_COUNT * 4];
int palette_video;
cvid_strip_t strips[MAX_STRIPS];
codebook[i].u = 128 + *data++;
codebook[i].v = 128 + *data++;
} else {
- /* this codebook type indicates either greyscale or
+ /* this codebook type indicates either greyscale or
* palettized video; if palettized, U & V components will
* not be used so it is safe to set them to 128 for the
* benefit of greyscale rendering in YUV420P */
uint8_t *eod = (data + size);
uint32_t flag, mask;
cvid_codebook_t *codebook;
- unsigned int i, j, x, y;
+ unsigned int x, y;
uint32_t iy[4];
uint32_t iu[2];
uint32_t iv[2];
s->frame.data[2][iv[0]] = codebook->v;
}
- s->frame.data[0][iy[0] + 2] = codebook->y0;
- s->frame.data[0][iy[0] + 3] = codebook->y0;
- s->frame.data[0][iy[1] + 2] = codebook->y0;
- s->frame.data[0][iy[1] + 3] = codebook->y0;
+ s->frame.data[0][iy[0] + 2] = codebook->y1;
+ s->frame.data[0][iy[0] + 3] = codebook->y1;
+ s->frame.data[0][iy[1] + 2] = codebook->y1;
+ s->frame.data[0][iy[1] + 3] = codebook->y1;
if (!s->palette_video) {
s->frame.data[1][iu[0] + 1] = codebook->u;
s->frame.data[2][iv[0] + 1] = codebook->v;
}
- s->frame.data[0][iy[2] + 0] = codebook->y0;
- s->frame.data[0][iy[2] + 1] = codebook->y0;
- s->frame.data[0][iy[3] + 0] = codebook->y0;
- s->frame.data[0][iy[3] + 1] = codebook->y0;
+ s->frame.data[0][iy[2] + 0] = codebook->y2;
+ s->frame.data[0][iy[2] + 1] = codebook->y2;
+ s->frame.data[0][iy[3] + 0] = codebook->y2;
+ s->frame.data[0][iy[3] + 1] = codebook->y2;
if (!s->palette_video) {
s->frame.data[1][iu[1]] = codebook->u;
s->frame.data[2][iv[1]] = codebook->v;
}
- s->frame.data[0][iy[2] + 2] = codebook->y0;
- s->frame.data[0][iy[2] + 3] = codebook->y0;
- s->frame.data[0][iy[3] + 2] = codebook->y0;
- s->frame.data[0][iy[3] + 3] = codebook->y0;
+ s->frame.data[0][iy[2] + 2] = codebook->y3;
+ s->frame.data[0][iy[2] + 3] = codebook->y3;
+ s->frame.data[0][iy[3] + 2] = codebook->y3;
+ s->frame.data[0][iy[3] + 3] = codebook->y3;
if (!s->palette_video) {
s->frame.data[1][iu[1] + 1] = codebook->u;
s->frame.data[2][iv[1] + 1] = codebook->v;
}
}
- } else {
- /* copy from the previous frame */
- for (i = 0; i < 4; i++) {
- for (j = 0; j < 4; j++) {
- s->frame.data[0][iy[i] + j] =
- s->prev_frame.data[0][iy[i] + j];
- }
- }
- for (i = 0; i < 2; i++) {
- for (j = 0; j < 2; j++) {
- s->frame.data[1][iu[i] + j] =
- s->prev_frame.data[1][iu[i] + j];
- s->frame.data[2][iv[i] + j] =
- s->prev_frame.data[2][iv[i] + j];
- }
- }
}
iy[0] += 4; iy[1] += 4;
while ((data + 4) <= eod) {
chunk_id = BE_16 (&data[0]);
chunk_size = BE_16 (&data[2]) - 4;
+ if(chunk_size < 0)
+ return -1;
+
data += 4;
chunk_size = ((data + chunk_size) > eod) ? (eod - data) : chunk_size;
case 0x2100:
case 0x2400:
case 0x2500:
- cinepak_decode_codebook (strip->v4_codebook, chunk_id,
+ cinepak_decode_codebook (strip->v4_codebook, chunk_id,
chunk_size, data);
break;
case 0x2300:
case 0x2600:
case 0x2700:
- cinepak_decode_codebook (strip->v1_codebook, chunk_id,
+ cinepak_decode_codebook (strip->v1_codebook, chunk_id,
chunk_size, data);
break;
case 0x3000:
case 0x3100:
case 0x3200:
- return cinepak_decode_vectors (s, strip, chunk_id,
+ return cinepak_decode_vectors (s, strip, chunk_id,
chunk_size, data);
}
uint8_t *eod = (s->data + s->size);
int i, result, strip_size, frame_flags, num_strips;
int y0 = 0;
+ int encoded_buf_size;
+ /* if true, Cinepak data is from a Sega FILM/CPK file */
+ int sega_film_data = 0;
if (s->size < 10)
return -1;
frame_flags = s->data[0];
num_strips = BE_16 (&s->data[8]);
- s->data += 10;
+ encoded_buf_size = ((s->data[1] << 16) | BE_16 (&s->data[2]));
+ if (encoded_buf_size != s->size)
+ sega_film_data = 1;
+ if (sega_film_data)
+ s->data += 12;
+ else
+ s->data += 10;
if (num_strips > MAX_STRIPS)
num_strips = MAX_STRIPS;
static int cinepak_decode_init(AVCodecContext *avctx)
{
CinepakContext *s = (CinepakContext *)avctx->priv_data;
-/*
- int i;
- unsigned char r, g, b;
- unsigned char *raw_palette;
- unsigned int *palette32;
-*/
s->avctx = avctx;
s->width = (avctx->width + 3) & ~3;
s->height = (avctx->height + 3) & ~3;
-// check for paletted data
-s->palette_video = 0;
-
+ // check for paletted data
+ if ((avctx->palctrl == NULL) || (avctx->bits_per_sample == 40)) {
+ s->palette_video = 0;
+ avctx->pix_fmt = PIX_FMT_YUV420P;
+ } else {
+ s->palette_video = 1;
+ avctx->pix_fmt = PIX_FMT_PAL8;
+ }
- avctx->pix_fmt = PIX_FMT_YUV420P;
avctx->has_b_frames = 0;
dsputil_init(&s->dsp, avctx);
- s->frame.data[0] = s->prev_frame.data[0] = NULL;
+ s->frame.data[0] = NULL;
return 0;
}
s->data = buf;
s->size = buf_size;
- if (avctx->get_buffer(avctx, &s->frame)) {
- av_log(avctx, AV_LOG_ERROR, " Cinepak: get_buffer() failed\n");
+ s->frame.reference = 1;
+ s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE |
+ FF_BUFFER_HINTS_REUSABLE;
+ if (avctx->reget_buffer(avctx, &s->frame)) {
+ av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
return -1;
}
cinepak_decode(s);
- if (s->prev_frame.data[0])
- avctx->release_buffer(avctx, &s->prev_frame);
-
- /* shuffle frames */
- s->prev_frame = s->frame;
+ if (s->palette_video) {
+ memcpy (s->frame.data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
+ if (avctx->palctrl->palette_changed) {
+ s->frame.palette_has_changed = 1;
+ avctx->palctrl->palette_changed = 0;
+ } else
+ s->frame.palette_has_changed = 0;
+ }
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;
{
CinepakContext *s = (CinepakContext *)avctx->priv_data;
- if (s->prev_frame.data[0])
- avctx->release_buffer(avctx, &s->prev_frame);
+ if (s->frame.data[0])
+ avctx->release_buffer(avctx, &s->frame);
return 0;
}
projects / ffmpeg / blobdiff