* CamStudio decoder
* Copyright (c) 2006 Reimar Doeffinger
*
- * 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
*/
#include <stdio.h>
#include <stdlib.h>
-#include "common.h"
#include "avcodec.h"
+#include "internal.h"
+#include "libavutil/common.h"
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
#include <zlib.h>
#endif
-#include "lzo.h"
+#include "libavutil/lzo.h"
typedef struct {
- AVFrame pic;
int linelen, height, bpp;
unsigned int decomp_size;
unsigned char* decomp_buf;
} CamStudioContext;
-static void copy_frame_default(AVFrame *f, uint8_t *src,
+static void copy_frame_default(AVFrame *f, const uint8_t *src, int src_stride,
int linelen, int height) {
int i;
uint8_t *dst = f->data[0];
dst += (height - 1) * f->linesize[0];
for (i = height; i; i--) {
memcpy(dst, src, linelen);
- src += linelen;
+ src += src_stride;
dst -= f->linesize[0];
}
}
-static void add_frame_default(AVFrame *f, uint8_t *src,
+static void add_frame_default(AVFrame *f, const uint8_t *src, int src_stride,
int linelen, int height) {
int i, j;
uint8_t *dst = f->data[0];
for (i = height; i; i--) {
for (j = linelen; j; j--)
*dst++ += *src++;
+ src += src_stride - linelen;
dst -= f->linesize[0] + linelen;
}
}
-#ifndef WORDS_BIGENDIAN
-#define copy_frame_16 copy_frame_default
-#define copy_frame_32 copy_frame_default
-#define add_frame_16 add_frame_default
-#define add_frame_32 add_frame_default
+#if !HAVE_BIGENDIAN
+#define copy_frame_16(f, s, l, h) copy_frame_default(f, s, l, l, h)
+#define copy_frame_32(f, s, l, h) copy_frame_default(f, s, l, l, h)
+#define add_frame_16(f, s, l, h) add_frame_default(f, s, l, l, h)
+#define add_frame_32(f, s, l, h) add_frame_default(f, s, l, l, h)
#else
-static void copy_frame_16(AVFrame *f, uint8_t *src,
+static void copy_frame_16(AVFrame *f, const uint8_t *src,
int linelen, int height) {
int i, j;
uint8_t *dst = f->data[0];
}
}
-static void copy_frame_32(AVFrame *f, uint8_t *src,
+static void copy_frame_32(AVFrame *f, const uint8_t *src,
int linelen, int height) {
int i, j;
uint8_t *dst = f->data[0];
}
}
-static void add_frame_16(AVFrame *f, uint8_t *src,
+static void add_frame_16(AVFrame *f, const uint8_t *src,
int linelen, int height) {
int i, j;
uint8_t *dst = f->data[0];
}
}
-static void add_frame_32(AVFrame *f, uint8_t *src,
+static void add_frame_32(AVFrame *f, const uint8_t *src,
int linelen, int height) {
int i, j;
uint8_t *dst = f->data[0];
}
#endif
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
- uint8_t *buf, int buf_size) {
- CamStudioContext *c = (CamStudioContext *)avctx->priv_data;
+static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+ AVPacket *avpkt) {
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ CamStudioContext *c = avctx->priv_data;
AVFrame *picture = data;
+ int ret;
if (buf_size < 2) {
av_log(avctx, AV_LOG_ERROR, "coded frame too small\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
- if (c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
- c->pic.reference = 1;
- c->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_READABLE |
- FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
- if (avctx->get_buffer(avctx, &c->pic) < 0) {
+ if ((ret = ff_get_buffer(avctx, picture, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
+ return ret;
}
// decompress data
switch ((buf[0] >> 1) & 7) {
case 0: { // lzo compression
int outlen = c->decomp_size, inlen = buf_size - 2;
- if (lzo1x_decode(c->decomp_buf, &outlen, &buf[2], &inlen))
+ if (av_lzo1x_decode(c->decomp_buf, &outlen, &buf[2], &inlen))
av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
break;
}
case 1: { // zlib compression
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
unsigned long dlen = c->decomp_size;
if (uncompress(c->decomp_buf, &dlen, &buf[2], buf_size - 2) != Z_OK)
av_log(avctx, AV_LOG_ERROR, "error during zlib decompression\n");
break;
#else
av_log(avctx, AV_LOG_ERROR, "compiled without zlib support\n");
- return -1;
+ return AVERROR(ENOSYS);
#endif
}
default:
av_log(avctx, AV_LOG_ERROR, "unknown compression\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
// flip upside down, add difference frame
if (buf[0] & 1) { // keyframe
- c->pic.pict_type = FF_I_TYPE;
- c->pic.key_frame = 1;
+ picture->pict_type = AV_PICTURE_TYPE_I;
+ picture->key_frame = 1;
switch (c->bpp) {
case 16:
- copy_frame_16(&c->pic, c->decomp_buf, c->linelen, c->height);
+ copy_frame_16(picture, c->decomp_buf, c->linelen, c->height);
break;
case 32:
- copy_frame_32(&c->pic, c->decomp_buf, c->linelen, c->height);
+ copy_frame_32(picture, c->decomp_buf, c->linelen, c->height);
break;
default:
- copy_frame_default(&c->pic, c->decomp_buf, c->linelen, c->height);
+ copy_frame_default(picture, c->decomp_buf, FFALIGN(c->linelen, 4),
+ c->linelen, c->height);
}
} else {
- c->pic.pict_type = FF_P_TYPE;
- c->pic.key_frame = 0;
+ picture->pict_type = AV_PICTURE_TYPE_P;
+ picture->key_frame = 0;
switch (c->bpp) {
case 16:
- add_frame_16(&c->pic, c->decomp_buf, c->linelen, c->height);
+ add_frame_16(picture, c->decomp_buf, c->linelen, c->height);
break;
case 32:
- add_frame_32(&c->pic, c->decomp_buf, c->linelen, c->height);
+ add_frame_32(picture, c->decomp_buf, c->linelen, c->height);
break;
default:
- add_frame_default(&c->pic, c->decomp_buf, c->linelen, c->height);
+ add_frame_default(picture, c->decomp_buf, FFALIGN(c->linelen, 4),
+ c->linelen, c->height);
}
}
- *picture = c->pic;
- *data_size = sizeof(AVFrame);
+ *got_frame = 1;
return buf_size;
}
-static int decode_init(AVCodecContext *avctx) {
- CamStudioContext *c = (CamStudioContext *)avctx->priv_data;
- if (avcodec_check_dimensions(avctx, avctx->height, avctx->width) < 0) {
- return 1;
- }
- avctx->has_b_frames = 0;
- switch (avctx->bits_per_sample) {
- 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_RGBA32; break;
+static av_cold int decode_init(AVCodecContext *avctx) {
+ CamStudioContext *c = avctx->priv_data;
+ int stride;
+ switch (avctx->bits_per_coded_sample) {
+ 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,
"CamStudio codec error: invalid depth %i bpp\n",
- avctx->bits_per_sample);
- return 1;
+ avctx->bits_per_coded_sample);
+ return AVERROR_INVALIDDATA;
}
- c->bpp = avctx->bits_per_sample;
- c->pic.data[0] = NULL;
- c->linelen = avctx->width * avctx->bits_per_sample / 8;
+ c->bpp = avctx->bits_per_coded_sample;
+ c->linelen = avctx->width * avctx->bits_per_coded_sample / 8;
c->height = avctx->height;
- c->decomp_size = c->height * c->linelen;
- c->decomp_buf = av_malloc(c->decomp_size + LZO_OUTPUT_PADDING);
+ stride = c->linelen;
+ if (avctx->bits_per_coded_sample == 24)
+ stride = FFALIGN(stride, 4);
+ c->decomp_size = c->height * stride;
+ c->decomp_buf = av_malloc(c->decomp_size + AV_LZO_OUTPUT_PADDING);
if (!c->decomp_buf) {
av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
- return 1;
+ return AVERROR(ENOMEM);
}
return 0;
}
-static int decode_end(AVCodecContext *avctx) {
- CamStudioContext *c = (CamStudioContext *)avctx->priv_data;
+static av_cold int decode_end(AVCodecContext *avctx) {
+ CamStudioContext *c = avctx->priv_data;
av_freep(&c->decomp_buf);
- if (c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
return 0;
}
-AVCodec cscd_decoder = {
- "camstudio",
- CODEC_TYPE_VIDEO,
- CODEC_ID_CSCD,
- sizeof(CamStudioContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_cscd_decoder = {
+ .name = "camstudio",
+ .long_name = NULL_IF_CONFIG_SMALL("CamStudio"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_CSCD,
+ .priv_data_size = sizeof(CamStudioContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1,
};
-
projects / ffmpeg / blobdiff