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Simplify camstudio decoding and fix odd 16bit decoding.

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Fixes ticket #1220.
pull/30/merge
Carl Eugen Hoyos 13 years ago
parent 9f98a8e9bc
commit 3dafde0b96
2 changed files with 10 additions and 105 deletions
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  1. 113
      libavcodec/cscd.c
  2. 2
      libavcodec/version.h

113
libavcodec/cscd.c
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@ -35,9 +35,9 @@ typedef struct {
unsigned char* decomp_buf;
} CamStudioContext;
static void copy_frame_default(AVFrame *f, const uint8_t *src, int src_stride,
static void copy_frame_default(AVFrame *f, const uint8_t *src,
int linelen, int height) {
int i;
int i, src_stride = FFALIGN(linelen, 4);
uint8_t *dst = f->data[0];
dst += (height - 1) * f->linesize[0];
for (i = height; i; i--) {
@ -47,9 +47,9 @@ static void copy_frame_default(AVFrame *f, const uint8_t *src, int src_stride,
}
}
static void add_frame_default(AVFrame *f, const uint8_t *src, int src_stride,
static void add_frame_default(AVFrame *f, const uint8_t *src,
int linelen, int height) {
int i, j;
int i, j, src_stride = FFALIGN(linelen, 4);
uint8_t *dst = f->data[0];
dst += (height - 1) * f->linesize[0];
for (i = height; i; i--) {
@ -60,81 +60,6 @@ static void add_frame_default(AVFrame *f, const uint8_t *src, int src_stride,
}
}
#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, const uint8_t *src,
int linelen, int height) {
int i, j;
uint8_t *dst = f->data[0];
dst += (height - 1) * f->linesize[0];
for (i = height; i; i--) {
for (j = linelen / 2; j; j--) {
dst[0] = src[1];
dst[1] = src[0];
src += 2;
dst += 2;
}
dst -= f->linesize[0] + linelen;
}
}
static void copy_frame_32(AVFrame *f, const uint8_t *src,
int linelen, int height) {
int i, j;
uint8_t *dst = f->data[0];
dst += (height - 1) * f->linesize[0];
for (i = height; i; i--) {
for (j = linelen / 4; j; j--) {
dst[0] = src[3];
dst[1] = src[2];
dst[2] = src[1];
dst[3] = src[0];
src += 4;
dst += 4;
}
dst -= f->linesize[0] + linelen;
}
}
static void add_frame_16(AVFrame *f, const uint8_t *src,
int linelen, int height) {
int i, j;
uint8_t *dst = f->data[0];
dst += (height - 1) * f->linesize[0];
for (i = height; i; i--) {
for (j = linelen / 2; j; j--) {
dst[0] += src[1];
dst[1] += src[0];
src += 2;
dst += 2;
}
dst -= f->linesize[0] + linelen;
}
}
static void add_frame_32(AVFrame *f, const uint8_t *src,
int linelen, int height) {
int i, j;
uint8_t *dst = f->data[0];
dst += (height - 1) * f->linesize[0];
for (i = height; i; i--) {
for (j = linelen / 4; j; j--) {
dst[0] += src[3];
dst[1] += src[2];
dst[2] += src[1];
dst[3] += src[0];
src += 4;
dst += 4;
}
dst -= f->linesize[0] + linelen;
}
}
#endif
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
AVPacket *avpkt) {
const uint8_t *buf = avpkt->data;
@ -185,32 +110,14 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
if (buf[0] & 1) { // keyframe
c->pic.pict_type = AV_PICTURE_TYPE_I;
c->pic.key_frame = 1;
switch (c->bpp) {
case 16:
copy_frame_16(&c->pic, c->decomp_buf, c->linelen, c->height);
break;
case 32:
copy_frame_32(&c->pic, c->decomp_buf, c->linelen, c->height);
break;
default:
copy_frame_default(&c->pic, c->decomp_buf, FFALIGN(c->linelen, 4),
copy_frame_default(&c->pic, c->decomp_buf,
c->linelen, c->height);
}
} else {
c->pic.pict_type = AV_PICTURE_TYPE_P;
c->pic.key_frame = 0;
switch (c->bpp) {
case 16:
add_frame_16(&c->pic, c->decomp_buf, c->linelen, c->height);
break;
case 32:
add_frame_32(&c->pic, c->decomp_buf, c->linelen, c->height);
break;
default:
add_frame_default(&c->pic, c->decomp_buf, FFALIGN(c->linelen, 4),
add_frame_default(&c->pic, c->decomp_buf,
c->linelen, c->height);
}
}
*picture = c->pic;
*data_size = sizeof(AVFrame);
@ -221,9 +128,9 @@ 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 = PIX_FMT_RGB555; break;
case 16: avctx->pix_fmt = PIX_FMT_RGB555LE; break;
case 24: avctx->pix_fmt = PIX_FMT_BGR24; break;
case 32: avctx->pix_fmt = PIX_FMT_RGB32; break;
case 32: avctx->pix_fmt = PIX_FMT_BGRA; break;
default:
av_log(avctx, AV_LOG_ERROR,
"CamStudio codec error: invalid depth %i bpp\n",
@ -235,9 +142,7 @@ static av_cold int decode_init(AVCodecContext *avctx) {
c->pic.data[0] = NULL;
c->linelen = avctx->width * avctx->bits_per_coded_sample / 8;
c->height = avctx->height;
stride = c->linelen;
if (avctx->bits_per_coded_sample == 24)
stride = FFALIGN(stride, 4);
stride = FFALIGN(c->linelen, 4);
c->decomp_size = c->height * stride;
c->decomp_buf = av_malloc(c->decomp_size + AV_LZO_OUTPUT_PADDING);
if (!c->decomp_buf) {

2
libavcodec/version.h
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@ -28,7 +28,7 @@
#define LIBAVCODEC_VERSION_MAJOR 54
#define LIBAVCODEC_VERSION_MINOR 17
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_MICRO 101
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \

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