*/
/**
- * @file tscc.c
+ * @file libavcodec/tscc.c
* TechSmith Camtasia decoder
*
* Fourcc: TSCC
#include <stdlib.h>
#include "avcodec.h"
+#include "msrledec.h"
-#ifdef CONFIG_ZLIB
#include <zlib.h>
-#endif
/*
// 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, const uint8_t *buf, int buf_size)
+static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
CamtasiaContext * const c = avctx->priv_data;
const unsigned char *encoded = buf;
unsigned char *outptr;
-#ifdef CONFIG_ZLIB
int zret; // Zlib return code
-#endif
int len = buf_size;
if(c->pic.data[0])
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);
if(zret != Z_DATA_ERROR)
- decode_rle(c, c->zstream.avail_out);
+ ff_msrle_decode(avctx, (AVPicture*)&c->pic, c->bpp, c->decomp_buf, c->zstream.avail_out);
/* make the palette available on the way out */
if (c->avctx->pix_fmt == PIX_FMT_PAL8) {
}
}
-#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;
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){
+ 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 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);
+ 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_sample;
+ 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
/* Allocate decompression buffer */
}
}
-#ifdef CONFIG_ZLIB
c->zstream.zalloc = Z_NULL;
c->zstream.zfree = Z_NULL;
c->zstream.opaque = Z_NULL;
av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
return 1;
}
-#endif
return 0;
}
if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
-#ifdef CONFIG_ZLIB
inflateEnd(&(c->zstream));
-#endif
return 0;
}
decode_end,
decode_frame,
CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("TechSmith Screen Capture Codec"),
};
projects / frescor / ffmpeg.git / blobdiff