* TechSmith Camtasia decoder
* Copyright (c) 2004 Konstantin Shishkov
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg 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 FFmpeg; 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 libavcodec/tscc.c
+ * @file
* TechSmith Camtasia decoder
*
* Fourcc: TSCC
unsigned int decomp_size;
// Decompression buffer
unsigned char* decomp_buf;
+ GetByteContext gb;
int height;
z_stream zstream;
+
+ uint32_t pal[256];
} CamtasiaContext;
/*
int buf_size = avpkt->size;
CamtasiaContext * const c = avctx->priv_data;
const unsigned char *encoded = buf;
- unsigned char *outptr;
int zret; // Zlib return code
int len = buf_size;
return -1;
}
- outptr = c->pic.data[0]; // Output image pointer
-
- zret = inflateReset(&(c->zstream));
+ zret = inflateReset(&c->zstream);
if (zret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
return -1;
c->zstream.avail_in = len;
c->zstream.next_out = c->decomp_buf;
c->zstream.avail_out = c->decomp_size;
- zret = inflate(&(c->zstream), Z_FINISH);
+ zret = inflate(&c->zstream, Z_FINISH);
// Z_DATA_ERROR means empty picture
if ((zret != Z_OK) && (zret != Z_STREAM_END) && (zret != Z_DATA_ERROR)) {
av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", zret);
}
- if(zret != Z_DATA_ERROR)
- ff_msrle_decode(avctx, (AVPicture*)&c->pic, c->bpp, c->decomp_buf, c->zstream.avail_out);
+ if (zret != Z_DATA_ERROR) {
+ bytestream2_init(&c->gb, c->decomp_buf,
+ c->decomp_size - c->zstream.avail_out);
+ ff_msrle_decode(avctx, (AVPicture*)&c->pic, c->bpp, &c->gb);
+ }
/* make the palette available on the way out */
- if (c->avctx->pix_fmt == PIX_FMT_PAL8) {
- memcpy(c->pic.data[1], c->avctx->palctrl->palette, AVPALETTE_SIZE);
- if (c->avctx->palctrl->palette_changed) {
+ if (c->avctx->pix_fmt == AV_PIX_FMT_PAL8) {
+ const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
+
+ if (pal) {
c->pic.palette_has_changed = 1;
- c->avctx->palctrl->palette_changed = 0;
+ memcpy(c->pal, pal, AVPALETTE_SIZE);
}
+ memcpy(c->pic.data[1], c->pal, AVPALETTE_SIZE);
}
*data_size = sizeof(AVFrame);
c->avctx = avctx;
- c->pic.data[0] = NULL;
c->height = avctx->height;
- if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
- return 1;
- }
-
// Needed if zlib unused or init aborted before inflateInit
- memset(&(c->zstream), 0, sizeof(z_stream));
+ memset(&c->zstream, 0, sizeof(z_stream));
switch(avctx->bits_per_coded_sample){
- case 8: avctx->pix_fmt = PIX_FMT_PAL8; break;
- case 16: avctx->pix_fmt = PIX_FMT_RGB555; break;
+ case 8: avctx->pix_fmt = AV_PIX_FMT_PAL8; break;
+ case 16: avctx->pix_fmt = AV_PIX_FMT_RGB555; break;
case 24:
- avctx->pix_fmt = PIX_FMT_BGR24;
+ avctx->pix_fmt = AV_PIX_FMT_BGR24;
break;
- case 32: avctx->pix_fmt = PIX_FMT_RGB32; break;
+ case 32: avctx->pix_fmt = AV_PIX_FMT_RGB32; break;
default: av_log(avctx, AV_LOG_ERROR, "Camtasia error: unknown depth %i bpp\n", avctx->bits_per_coded_sample);
return -1;
}
c->bpp = avctx->bits_per_coded_sample;
- c->decomp_size = (avctx->width * c->bpp + (avctx->width + 254) / 255 + 2) * avctx->height + 2;//RLE in the 'best' case
+ // buffer size for RLE 'best' case when 2-byte code precedes each pixel and there may be padding after it too
+ c->decomp_size = (((avctx->width * c->bpp + 7) >> 3) + 3 * avctx->width + 2) * avctx->height + 2;
/* Allocate decompression buffer */
if (c->decomp_size) {
c->zstream.zalloc = Z_NULL;
c->zstream.zfree = Z_NULL;
c->zstream.opaque = Z_NULL;
- zret = inflateInit(&(c->zstream));
+ zret = inflateInit(&c->zstream);
if (zret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
return 1;
if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
- inflateEnd(&(c->zstream));
+ inflateEnd(&c->zstream);
return 0;
}
-AVCodec tscc_decoder = {
- "camtasia",
- CODEC_TYPE_VIDEO,
- CODEC_ID_TSCC,
- sizeof(CamtasiaContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("TechSmith Screen Capture Codec"),
+AVCodec ff_tscc_decoder = {
+ .name = "camtasia",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_TSCC,
+ .priv_data_size = sizeof(CamtasiaContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("TechSmith Screen Capture Codec"),
};
-
projects / ffmpeg / blobdiff