diff options
Diffstat (limited to 'ffmpeg1/libavcodec/tscc.c')
| -rw-r--r-- | ffmpeg1/libavcodec/tscc.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/ffmpeg1/libavcodec/tscc.c b/ffmpeg1/libavcodec/tscc.c deleted file mode 100644 index 6e1e077..0000000 --- a/ffmpeg1/libavcodec/tscc.c +++ /dev/null @@ -1,190 +0,0 @@ -/* - * TechSmith Camtasia decoder - * Copyright (c) 2004 Konstantin Shishkov - * - * 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 2.1 of the License, or (at your option) any later version. - * - * 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 FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * TechSmith Camtasia decoder - * - * Fourcc: TSCC - * - * Codec is very simple: - * it codes picture (picture difference, really) - * with algorithm almost identical to Windows RLE8, - * only without padding and with greater pixel sizes, - * then this coded picture is packed with ZLib - * - * Supports: BGR8,BGR555,BGR24 - only BGR8 and BGR555 tested - * - */ - -#include <stdio.h> -#include <stdlib.h> - -#include "avcodec.h" -#include "internal.h" -#include "msrledec.h" - -#include <zlib.h> - -typedef struct TsccContext { - - AVCodecContext *avctx; - AVFrame *frame; - - // Bits per pixel - int bpp; - // Decompressed data size - unsigned int decomp_size; - // Decompression buffer - unsigned char* decomp_buf; - GetByteContext gb; - int height; - z_stream zstream; - - uint32_t pal[256]; -} CamtasiaContext; - -static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, - AVPacket *avpkt) -{ - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - CamtasiaContext * const c = avctx->priv_data; - const unsigned char *encoded = buf; - AVFrame *frame = c->frame; - int zret; // Zlib return code - int ret, len = buf_size; - - if ((ret = ff_reget_buffer(avctx, frame)) < 0) - return ret; - - zret = inflateReset(&c->zstream); - if (zret != Z_OK) { - av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret); - return AVERROR_UNKNOWN; - } - c->zstream.next_in = (uint8_t*)encoded; - 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); - // 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); - return AVERROR_UNKNOWN; - } - - - if (zret != Z_DATA_ERROR) { - bytestream2_init(&c->gb, c->decomp_buf, - c->decomp_size - c->zstream.avail_out); - ff_msrle_decode(avctx, (AVPicture*)frame, c->bpp, &c->gb); - } - - /* make the palette available on the way out */ - 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) { - frame->palette_has_changed = 1; - memcpy(c->pal, pal, AVPALETTE_SIZE); - } - memcpy(frame->data[1], c->pal, AVPALETTE_SIZE); - } - - if ((ret = av_frame_ref(data, frame)) < 0) - return ret; - *got_frame = 1; - - /* always report that the buffer was completely consumed */ - return buf_size; -} - -static av_cold int decode_init(AVCodecContext *avctx) -{ - CamtasiaContext * const c = avctx->priv_data; - int zret; // Zlib return code - - c->avctx = avctx; - - c->height = avctx->height; - - // Needed if zlib unused or init aborted before inflateInit - memset(&c->zstream, 0, sizeof(z_stream)); - switch(avctx->bits_per_coded_sample){ - 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 = AV_PIX_FMT_BGR24; - 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 AVERROR_PATCHWELCOME; - } - c->bpp = avctx->bits_per_coded_sample; - // 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) { - if ((c->decomp_buf = av_malloc(c->decomp_size)) == NULL) { - av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n"); - return AVERROR(ENOMEM); - } - } - - c->zstream.zalloc = Z_NULL; - c->zstream.zfree = Z_NULL; - c->zstream.opaque = Z_NULL; - zret = inflateInit(&c->zstream); - if (zret != Z_OK) { - av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret); - return AVERROR_UNKNOWN; - } - - c->frame = av_frame_alloc(); - - return 0; -} - -static av_cold int decode_end(AVCodecContext *avctx) -{ - CamtasiaContext * const c = avctx->priv_data; - - av_freep(&c->decomp_buf); - av_frame_free(&c->frame); - - inflateEnd(&c->zstream); - - return 0; -} - -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"), -}; |