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lavd: some performance improvements in color transformations

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This commit is contained in:
Martin Pulec
2013-01-28 10:48:36 +01:00
parent 122c052030
commit 5fcaae1dfd
1 changed files with 21 additions and 12 deletions
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33
src/video_decompress/libavcodec.c
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@@ -146,7 +146,8 @@ static bool configure_with(struct state_libavcodec_decompress *s,
#endif
}
s->codec_ctx->pix_fmt = PIX_FMT_YUV420P;
// set by decoder
s->codec_ctx->pix_fmt = PIX_FMT_NONE;
if(avcodec_open2(s->codec_ctx, s->codec, NULL) < 0) {
fprintf(stderr, "[lavd] Unable to open decoder.\n");
@@ -219,11 +220,12 @@ int libavcodec_decompress_reconfigure(void *state, struct video_desc desc,
static void yuv420p_to_yuv422(char *dst_buffer, AVFrame *in_frame,
int width, int height)
{
char *dst = dst_buffer + 1;
for(int y = 0; y < (int) height; ++y) {
char *src = (char *) in_frame->data[0] + in_frame->linesize[0] * y;
char *dst = (char *) dst_buffer + width * y * 2;
for(int x = 0; x < width; ++x) {
dst[x * 2 + 1] = src[x];
*dst = *src++;
dst += 2;
}
}
@@ -233,10 +235,14 @@ static void yuv420p_to_yuv422(char *dst_buffer, AVFrame *in_frame,
char *dst1 = dst_buffer + width * (y * 2) * 2;
char *dst2 = dst_buffer + (y * 2 + 1) * width * 2;
for(int x = 0; x < width / 2; ++x) {
dst1[x * 4] = src_cb[x];
dst1[x * 4 + 2] = src_cr[x];
dst2[x * 4] = src_cb[x];
dst2[x * 4 + 2] = src_cr[x];
*dst1 = *src_cb;
dst1 += 2;
*dst1 = *src_cr;
dst1 += 2;
*dst2 = *src_cb++;
dst2 += 2;
*dst2 = *src_cr++;
dst2 += 2;
}
}
}
@@ -244,21 +250,24 @@ static void yuv420p_to_yuv422(char *dst_buffer, AVFrame *in_frame,
static void yuv422p_to_yuv422(char *dst_buffer, AVFrame *in_frame,
int width, int height)
{
char *dst = (char *) dst_buffer + 1;
for(int y = 0; y < (int) height; ++y) {
char *src = (char *) in_frame->data[0] + in_frame->linesize[0] * y;
char *dst = (char *) dst_buffer + width * y * 2;
for(int x = 0; x < width; ++x) {
dst[x * 2 + 1] = src[x];
*dst = *src++;
dst += 2;
}
}
dst = dst_buffer;
for(int y = 0; y < (int) height; ++y) {
char *src_cb = (char *) in_frame->data[1] + in_frame->linesize[1] * y;
char *src_cr = (char *) in_frame->data[2] + in_frame->linesize[2] * y;
char *dst = dst_buffer + width * y * 2;
for(int x = 0; x < width / 2; ++x) {
dst[x * 4] = src_cb[x];
dst[x * 4 + 2] = src_cr[x];
*dst = *src_cb++;
dst += 2;
*dst = *src_cr++;
dst += 2;
}
}
}