[FFmpeg-cvslog] utvideoenc: Avoid writing into the input picture
Michael Niedermayer
git at videolan.org
Fri Aug 31 13:08:35 CEST 2012
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sat Aug 25 21:34:35 2012 +0000| [bbefd27e52dfdd2a73bef710602c9978aca4ab7c] | committer: Derek Buitenhuis
utvideoenc: Avoid writing into the input picture
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=bbefd27e52dfdd2a73bef710602c9978aca4ab7c
---
libavcodec/utvideo.h | 2 +-
libavcodec/utvideoenc.c | 66 +++++++++++++++++++++++++++++------------------
2 files changed, 42 insertions(+), 26 deletions(-)
diff --git a/libavcodec/utvideo.h b/libavcodec/utvideo.h
index ed6ae86..fe2487c 100644
--- a/libavcodec/utvideo.h
+++ b/libavcodec/utvideo.h
@@ -75,7 +75,7 @@ typedef struct UtvideoContext {
int interlaced;
int frame_pred;
- uint8_t *slice_bits, *slice_buffer;
+ uint8_t *slice_bits, *slice_buffer[4];
int slice_bits_size;
} UtvideoContext;
diff --git a/libavcodec/utvideoenc.c b/libavcodec/utvideoenc.c
index 3e0d66c..d99ed0d 100644
--- a/libavcodec/utvideoenc.c
+++ b/libavcodec/utvideoenc.c
@@ -44,10 +44,12 @@ static int huff_cmp_sym(const void *a, const void *b)
static av_cold int utvideo_encode_close(AVCodecContext *avctx)
{
UtvideoContext *c = avctx->priv_data;
+ int i;
av_freep(&avctx->coded_frame);
av_freep(&c->slice_bits);
- av_freep(&c->slice_buffer);
+ for (i = 0; i < 4; i++)
+ av_freep(&c->slice_buffer[i]);
return 0;
}
@@ -55,7 +57,7 @@ static av_cold int utvideo_encode_close(AVCodecContext *avctx)
static av_cold int utvideo_encode_init(AVCodecContext *avctx)
{
UtvideoContext *c = avctx->priv_data;
-
+ int i;
uint32_t original_format;
c->avctx = avctx;
@@ -142,13 +144,14 @@ static av_cold int utvideo_encode_init(AVCodecContext *avctx)
return AVERROR(ENOMEM);
}
- c->slice_buffer = av_malloc(avctx->width * avctx->height +
- FF_INPUT_BUFFER_PADDING_SIZE);
-
- if (!c->slice_buffer) {
- av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer 1.\n");
- utvideo_encode_close(avctx);
- return AVERROR(ENOMEM);
+ for (i = 0; i < c->planes; i++) {
+ c->slice_buffer[i] = av_malloc(avctx->width * (avctx->height + 1) +
+ FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!c->slice_buffer[i]) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer 1.\n");
+ utvideo_encode_close(avctx);
+ return AVERROR(ENOMEM);
+ }
}
/*
@@ -193,20 +196,33 @@ static av_cold int utvideo_encode_init(AVCodecContext *avctx)
return 0;
}
-static void mangle_rgb_planes(uint8_t *src, int step, int stride, int width,
- int height)
+static void mangle_rgb_planes(uint8_t *dst[4], uint8_t *src, int step,
+ int stride, int width, int height)
{
int i, j;
- uint8_t r, g, b;
+ int k = width;
+ unsigned int g;
for (j = 0; j < height; j++) {
- for (i = 0; i < width * step; i += step) {
- r = src[i];
- g = src[i + 1];
- b = src[i + 2];
-
- src[i] = r - g + 0x80;
- src[i + 2] = b - g + 0x80;
+ if (step == 3) {
+ for (i = 0; i < width * step; i += step) {
+ g = src[i + 1];
+ dst[0][k] = g;
+ g += 0x80;
+ dst[1][k] = src[i + 2] - g;
+ dst[2][k] = src[i + 0] - g;
+ k++;
+ }
+ } else {
+ for (i = 0; i < width * step; i += step) {
+ g = src[i + 1];
+ dst[0][k] = g;
+ g += 0x80;
+ dst[1][k] = src[i + 2] - g;
+ dst[2][k] = src[i + 0] - g;
+ dst[3][k] = src[i + 3];
+ k++;
+ }
}
src += stride;
}
@@ -535,16 +551,16 @@ static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
/* In case of RGB, mangle the planes to Ut Video's format */
if (avctx->pix_fmt == PIX_FMT_RGBA || avctx->pix_fmt == PIX_FMT_RGB24)
- mangle_rgb_planes(pic->data[0], c->planes, pic->linesize[0], width,
- height);
+ mangle_rgb_planes(c->slice_buffer, pic->data[0], c->planes,
+ pic->linesize[0], width, height);
/* Deal with the planes */
switch (avctx->pix_fmt) {
case PIX_FMT_RGB24:
case PIX_FMT_RGBA:
for (i = 0; i < c->planes; i++) {
- ret = encode_plane(avctx, pic->data[0] + ff_ut_rgb_order[i],
- c->slice_buffer, c->planes, pic->linesize[0],
+ ret = encode_plane(avctx, c->slice_buffer[i] + width,
+ c->slice_buffer[i], 1, width,
width, height, &pb);
if (ret) {
@@ -555,7 +571,7 @@ static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
break;
case PIX_FMT_YUV422P:
for (i = 0; i < c->planes; i++) {
- ret = encode_plane(avctx, pic->data[i], c->slice_buffer, 1,
+ ret = encode_plane(avctx, pic->data[i], c->slice_buffer[0], 1,
pic->linesize[i], width >> !!i, height, &pb);
if (ret) {
@@ -566,7 +582,7 @@ static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
break;
case PIX_FMT_YUV420P:
for (i = 0; i < c->planes; i++) {
- ret = encode_plane(avctx, pic->data[i], c->slice_buffer, 1,
+ ret = encode_plane(avctx, pic->data[i], c->slice_buffer[0], 1,
pic->linesize[i], width >> !!i, height >> !!i,
&pb);
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