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-rw-r--r--contrib/ffmpeg/libavcodec/tscc.c347
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diff --git a/contrib/ffmpeg/libavcodec/tscc.c b/contrib/ffmpeg/libavcodec/tscc.c
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--- a/contrib/ffmpeg/libavcodec/tscc.c
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-/*
- * 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 tscc.c
- * 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 "common.h"
-#include "avcodec.h"
-
-#ifdef CONFIG_ZLIB
-#include <zlib.h>
-#endif
-
-
-/*
- * Decoder context
- */
-typedef struct TsccContext {
-
- AVCodecContext *avctx;
- AVFrame pic;
-
- // Bits per pixel
- int bpp;
- // Decompressed data size
- unsigned int decomp_size;
- // Decompression buffer
- unsigned char* decomp_buf;
- int height;
-#ifdef CONFIG_ZLIB
- z_stream zstream;
-#endif
-} CamtasiaContext;
-
-/*
- *
- * Decode RLE - almost identical to Windows BMP RLE8
- * and enhanced to bigger color depths
- *
- */
-
-static int decode_rle(CamtasiaContext *c, unsigned int srcsize)
-{
- unsigned char *src = c->decomp_buf;
- unsigned char *output, *output_end;
- int p1, p2, line=c->height, pos=0, i;
- uint16_t pix16;
- uint32_t pix32;
-
- output = c->pic.data[0] + (c->height - 1) * c->pic.linesize[0];
- output_end = c->pic.data[0] + (c->height) * c->pic.linesize[0];
- while(src < c->decomp_buf + srcsize) {
- p1 = *src++;
- if(p1 == 0) { //Escape code
- p2 = *src++;
- if(p2 == 0) { //End-of-line
- output = c->pic.data[0] + (--line) * c->pic.linesize[0];
- if (line < 0)
- return -1;
- pos = 0;
- continue;
- } else if(p2 == 1) { //End-of-picture
- return 0;
- } else if(p2 == 2) { //Skip
- p1 = *src++;
- p2 = *src++;
- line -= p2;
- if (line < 0)
- return -1;
- pos += p1;
- output = c->pic.data[0] + line * c->pic.linesize[0] + pos * (c->bpp / 8);
- continue;
- }
- // Copy data
- if (output + p2 * (c->bpp / 8) > output_end) {
- src += p2 * (c->bpp / 8);
- continue;
- }
- if ((c->bpp == 8) || (c->bpp == 24)) {
- for(i = 0; i < p2 * (c->bpp / 8); i++) {
- *output++ = *src++;
- }
- // RLE8 copy is actually padded - and runs are not!
- if(c->bpp == 8 && (p2 & 1)) {
- src++;
- }
- } else if (c->bpp == 16) {
- for(i = 0; i < p2; i++) {
- pix16 = AV_RL16(src);
- src += 2;
- *(uint16_t*)output = pix16;
- output += 2;
- }
- } else if (c->bpp == 32) {
- for(i = 0; i < p2; i++) {
- pix32 = AV_RL32(src);
- src += 4;
- *(uint32_t*)output = pix32;
- output += 4;
- }
- }
- pos += p2;
- } else { //Run of pixels
- int pix[4]; //original pixel
- switch(c->bpp){
- case 8: pix[0] = *src++;
- break;
- case 16: pix16 = AV_RL16(src);
- src += 2;
- *(uint16_t*)pix = pix16;
- break;
- case 24: pix[0] = *src++;
- pix[1] = *src++;
- pix[2] = *src++;
- break;
- case 32: pix32 = AV_RL32(src);
- src += 4;
- *(uint32_t*)pix = pix32;
- break;
- }
- if (output + p1 * (c->bpp / 8) > output_end)
- continue;
- for(i = 0; i < p1; i++) {
- switch(c->bpp){
- case 8: *output++ = pix[0];
- break;
- case 16: *(uint16_t*)output = pix16;
- output += 2;
- break;
- case 24: *output++ = pix[0];
- *output++ = pix[1];
- *output++ = pix[2];
- break;
- case 32: *(uint32_t*)output = pix32;
- output += 4;
- break;
- }
- }
- pos += p1;
- }
- }
-
- av_log(c->avctx, AV_LOG_ERROR, "Camtasia warning: no End-of-picture code\n");
- return 1;
-}
-
-/*
- *
- * Decode a frame
- *
- */
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
-{
- CamtasiaContext * const c = (CamtasiaContext *)avctx->priv_data;
- unsigned char *encoded = (unsigned char *)buf;
- unsigned char *outptr;
-#ifdef CONFIG_ZLIB
- int zret; // Zlib return code
-#endif
- int len = buf_size;
-
- if(c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
-
- c->pic.reference = 1;
- c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
- if(avctx->get_buffer(avctx, &c->pic) < 0){
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
-
- outptr = c->pic.data[0]; // Output image pointer
-
-#ifdef CONFIG_ZLIB
- zret = inflateReset(&(c->zstream));
- if (zret != Z_OK) {
- av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
- return -1;
- }
- c->zstream.next_in = 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 -1;
- }
-
-
- if(zret != Z_DATA_ERROR)
- decode_rle(c, c->zstream.avail_out);
-
- /* 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) {
- c->pic.palette_has_changed = 1;
- c->avctx->palctrl->palette_changed = 0;
- }
- }
-
-#else
- av_log(avctx, AV_LOG_ERROR, "BUG! Zlib support not compiled in frame decoder.\n");
- return -1;
-#endif
-
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = c->pic;
-
- /* always report that the buffer was completely consumed */
- return buf_size;
-}
-
-
-
-/*
- *
- * Init tscc decoder
- *
- */
-static int decode_init(AVCodecContext *avctx)
-{
- CamtasiaContext * const c = (CamtasiaContext *)avctx->priv_data;
- int zret; // Zlib return code
-
- c->avctx = avctx;
-
- c->pic.data[0] = NULL;
- c->height = avctx->height;
-
- if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
- return 1;
- }
-
-#ifdef CONFIG_ZLIB
- // Needed if zlib unused or init aborted before inflateInit
- memset(&(c->zstream), 0, sizeof(z_stream));
-#else
- av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
- return 1;
-#endif
- switch(avctx->bits_per_sample){
- case 8: avctx->pix_fmt = PIX_FMT_PAL8; break;
- case 16: avctx->pix_fmt = PIX_FMT_RGB555; break;
- case 24:
- avctx->pix_fmt = PIX_FMT_BGR24;
- break;
- case 32: avctx->pix_fmt = PIX_FMT_RGB32; break;
- default: av_log(avctx, AV_LOG_ERROR, "Camtasia error: unknown depth %i bpp\n", avctx->bits_per_sample);
- return -1;
- }
- c->bpp = avctx->bits_per_sample;
- c->decomp_size = (avctx->width * c->bpp + (avctx->width + 254) / 255 + 2) * avctx->height + 2;//RLE in the 'best' case
-
- /* 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 1;
- }
- }
-
-#ifdef CONFIG_ZLIB
- 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 1;
- }
-#endif
-
- return 0;
-}
-
-
-
-/*
- *
- * Uninit tscc decoder
- *
- */
-static int decode_end(AVCodecContext *avctx)
-{
- CamtasiaContext * const c = (CamtasiaContext *)avctx->priv_data;
-
- av_freep(&c->decomp_buf);
-
- if (c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
-#ifdef CONFIG_ZLIB
- inflateEnd(&(c->zstream));
-#endif
-
- return 0;
-}
-
-AVCodec tscc_decoder = {
- "camtasia",
- CODEC_TYPE_VIDEO,
- CODEC_ID_TSCC,
- sizeof(CamtasiaContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
-};
-
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