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indeo3: do not try to output more lines than we can fit

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Internally chroma planes have multiple of four height while allocated image
planes might be smaller if CODEC_FLAG_EMU_EDGE is set. Thus we should not
output more lines of chroma than frame can accept.

Also the decoder can be safely switched to direct rendering now.
This commit is contained in:
Kostya Shishkov 2012-10-18 11:45:42 +02:00
parent 8774d58358
commit 169514c440
1 changed files with 15 additions and 5 deletions
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20
libavcodec/indeo3.c
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@ -978,14 +978,17 @@ static int decode_frame_headers(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
* @param[in] buf_sel indicates which frame buffer the input data stored in
* @param[out] dst pointer to the buffer receiving converted pixels
* @param[in] dst_pitch pitch for moving to the next y line
* @param[in] dst_height output plane height
*/
static void output_plane(const Plane *plane, int buf_sel, uint8_t *dst, int dst_pitch)
static void output_plane(const Plane *plane, int buf_sel, uint8_t *dst,
int dst_pitch, int dst_height)
{
int x,y;
const uint8_t *src = plane->pixels[buf_sel];
uint32_t pitch = plane->pitch;
for (y = 0; y < plane->height; y++) {
dst_height = FFMIN(dst_height, plane->height);
for (y = 0; y < dst_height; y++) {
/* convert four pixels at once using SWAR */
for (x = 0; x < plane->width >> 2; x++) {
AV_WN32A(dst, (AV_RN32A(src) & 0x7F7F7F7F) << 1);
@ -1072,9 +1075,15 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
return res;
}
output_plane(&ctx->planes[0], ctx->buf_sel, ctx->frame.data[0], ctx->frame.linesize[0]);
output_plane(&ctx->planes[1], ctx->buf_sel, ctx->frame.data[1], ctx->frame.linesize[1]);
output_plane(&ctx->planes[2], ctx->buf_sel, ctx->frame.data[2], ctx->frame.linesize[2]);
output_plane(&ctx->planes[0], ctx->buf_sel,
ctx->frame.data[0], ctx->frame.linesize[0],
avctx->height);
output_plane(&ctx->planes[1], ctx->buf_sel,
ctx->frame.data[1], ctx->frame.linesize[1],
(avctx->height + 3) >> 2);
output_plane(&ctx->planes[2], ctx->buf_sel,
ctx->frame.data[2], ctx->frame.linesize[2],
(avctx->height + 3) >> 2);
*data_size = sizeof(AVFrame);
*(AVFrame*)data = ctx->frame;
@ -1103,5 +1112,6 @@ AVCodec ff_indeo3_decoder = {
.init = decode_init,
.close = decode_close,
.decode = decode_frame,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),
};