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add extra meaning to WebPDecBuffer::is_external_memory

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If value is '2', it means the buffer is a 'slow' one, like GPU-mapped memory.

This change is backward compatible (setting is_external_memory to 2
will be a no-op in previous libraries)

dwebp:  add flags to force a particular colorspace format
new flags is:
   -pixel_format {RGB,RGBA,BGR,BGRA,ARGB,RGBA_4444,RGB_565,
                  rgbA,bgrA,Argb,rgbA_4444,YUV,YUVA}
and also,external_memory {0,1,2}
These flags are mostly for debuggging purpose, and hence are not documented.

Change-Id: Iac88ce1e10b35163dd7af57f9660f062f5d8ed5e
This commit is contained in:
Pascal Massimino
2016-03-09 08:58:58 +01:00
parent a90edffb7e
commit abdb109f3b
7 changed files with 296 additions and 46 deletions
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46
src/dec/buffer.c
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@@ -92,7 +92,7 @@ static VP8StatusCode AllocateBuffer(WebPDecBuffer* const buffer) {
return VP8_STATUS_INVALID_PARAM;
}
if (!buffer->is_external_memory && buffer->private_memory == NULL) {
if (buffer->is_external_memory <= 0 && buffer->private_memory == NULL) {
uint8_t* output;
int uv_stride = 0, a_stride = 0;
uint64_t uv_size = 0, a_size = 0, total_size;
@@ -227,7 +227,7 @@ int WebPInitDecBufferInternal(WebPDecBuffer* buffer, int version) {
void WebPFreeDecBuffer(WebPDecBuffer* buffer) {
if (buffer != NULL) {
if (!buffer->is_external_memory) {
if (buffer->is_external_memory <= 0) {
WebPSafeFree(buffer->private_memory);
}
buffer->private_memory = NULL;
@@ -256,5 +256,45 @@ void WebPGrabDecBuffer(WebPDecBuffer* const src, WebPDecBuffer* const dst) {
}
}
//------------------------------------------------------------------------------
VP8StatusCode WebPCopyDecBufferPixels(const WebPDecBuffer* const src_buf,
WebPDecBuffer* const dst_buf) {
assert(src_buf != NULL && dst_buf != NULL);
assert(src_buf->colorspace == dst_buf->colorspace);
dst_buf->width = src_buf->width;
dst_buf->height = src_buf->height;
if (CheckDecBuffer(dst_buf) != VP8_STATUS_OK) {
return VP8_STATUS_INVALID_PARAM;
}
if (WebPIsRGBMode(src_buf->colorspace)) {
const WebPRGBABuffer* const src = &src_buf->u.RGBA;
const WebPRGBABuffer* const dst = &dst_buf->u.RGBA;
WebPCopyPlane(src->rgba, src->stride, dst->rgba, dst->stride,
src_buf->width * kModeBpp[src_buf->colorspace],
src_buf->height);
} else {
const WebPYUVABuffer* const src = &src_buf->u.YUVA;
const WebPYUVABuffer* const dst = &dst_buf->u.YUVA;
WebPCopyPlane(src->y, src->y_stride, dst->y, dst->y_stride,
src_buf->width, src_buf->height);
WebPCopyPlane(src->u, src->u_stride, dst->u, dst->u_stride,
(src_buf->width + 1) / 2, (src_buf->height + 1) / 2);
WebPCopyPlane(src->v, src->v_stride, dst->v, dst->v_stride,
(src_buf->width + 1) / 2, (src_buf->height + 1) / 2);
if (WebPIsAlphaMode(src_buf->colorspace)) {
WebPCopyPlane(src->a, src->a_stride, dst->a, dst->a_stride,
src_buf->width, src_buf->height);
}
}
return VP8_STATUS_OK;
}
int WebPAvoidSlowMemory(const WebPDecBuffer* const output,
const WebPBitstreamFeatures* const features) {
assert(output != NULL);
return (output->is_external_memory >= 2) &&
WebPIsPremultipliedMode(output->colorspace) &&
(features != NULL && features->has_alpha);
}
//------------------------------------------------------------------------------