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add support for ARGB -> YUVA conversion for lossless decoder

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This was returning an (hard-to-explain) error before.
(through WebPDecodeYUV() for instance).

+ rationalize the incremental API:
-> add WebPINewYUVA
-> deprecated WebPINewYUV
-> add WebPIDecGetYUVA
-> deprecated WebPIDecGetYUV

+ some NULL cosmetics

Change-Id: I39a6bd6018a34294d898b29f6c40e2cf76f1037e
This commit is contained in:
Pascal Massimino
2012-08-03 22:15:34 +00:00
committed by James Zern
parent 33705ca093
commit 43b0d6107a
5 changed files with 214 additions and 64 deletions
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74
src/dec/idec.c
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@ -567,7 +567,7 @@ WebPIDecoder* WebPIDecode(const uint8_t* data, size_t data_size,
}
// Create an instance of the incremental decoder
idec = WebPINewDecoder(config ? &config->output : NULL);
if (!idec) {
if (idec == NULL) {
return NULL;
}
// Finish initialization
@ -599,7 +599,7 @@ WebPIDecoder* WebPINewRGB(WEBP_CSP_MODE mode, uint8_t* output_buffer,
WebPIDecoder* idec;
if (mode >= MODE_YUV) return NULL;
idec = WebPINewDecoder(NULL);
if (!idec) return NULL;
if (idec == NULL) return NULL;
idec->output_.colorspace = mode;
idec->output_.is_external_memory = 1;
idec->output_.u.RGBA.rgba = output_buffer;
@ -608,12 +608,13 @@ WebPIDecoder* WebPINewRGB(WEBP_CSP_MODE mode, uint8_t* output_buffer,
return idec;
}
WebPIDecoder* WebPINewYUV(uint8_t* luma, size_t luma_size, int luma_stride,
uint8_t* u, size_t u_size, int u_stride,
uint8_t* v, size_t v_size, int v_stride) {
WebPIDecoder* WebPINewYUVA(uint8_t* luma, size_t luma_size, int luma_stride,
uint8_t* u, size_t u_size, int u_stride,
uint8_t* v, size_t v_size, int v_stride,
uint8_t* a, size_t a_size, int a_stride) {
WebPIDecoder* const idec = WebPINewDecoder(NULL);
if (!idec) return NULL;
idec->output_.colorspace = MODE_YUV;
if (idec == NULL) return NULL;
idec->output_.colorspace = (a == NULL) ? MODE_YUV : MODE_YUVA;
idec->output_.is_external_memory = 1;
idec->output_.u.YUVA.y = luma;
idec->output_.u.YUVA.y_stride = luma_stride;
@ -624,9 +625,21 @@ WebPIDecoder* WebPINewYUV(uint8_t* luma, size_t luma_size, int luma_stride,
idec->output_.u.YUVA.v = v;
idec->output_.u.YUVA.v_stride = v_stride;
idec->output_.u.YUVA.v_size = v_size;
idec->output_.u.YUVA.a = a;
idec->output_.u.YUVA.a_stride = a_stride;
idec->output_.u.YUVA.a_size = a_size;
return idec;
}
WebPIDecoder* WebPINewYUV(uint8_t* luma, size_t luma_size, int luma_stride,
uint8_t* u, size_t u_size, int u_stride,
uint8_t* v, size_t v_size, int v_stride) {
return WebPINewYUVA(luma, luma_size, luma_stride,
u, u_size, u_stride,
v, v_size, v_stride,
NULL, 0, 0);
}
//------------------------------------------------------------------------------
static VP8StatusCode IDecCheckStatus(const WebPIDecoder* const idec) {
@ -698,15 +711,15 @@ const WebPDecBuffer* WebPIDecodedArea(const WebPIDecoder* idec,
int* left, int* top,
int* width, int* height) {
const WebPDecBuffer* const src = GetOutputBuffer(idec);
if (left) *left = 0;
if (top) *top = 0;
if (left != NULL) *left = 0;
if (top != NULL) *top = 0;
// TODO(skal): later include handling of rotations.
if (src) {
if (width) *width = src->width;
if (height) *height = idec->params_.last_y;
if (width != NULL) *width = src->width;
if (height != NULL) *height = idec->params_.last_y;
} else {
if (width) *width = 0;
if (height) *height = 0;
if (width != NULL) *width = 0;
if (height != NULL) *height = 0;
}
return src;
}
@ -714,35 +727,38 @@ const WebPDecBuffer* WebPIDecodedArea(const WebPIDecoder* idec,
uint8_t* WebPIDecGetRGB(const WebPIDecoder* idec, int* last_y,
int* width, int* height, int* stride) {
const WebPDecBuffer* const src = GetOutputBuffer(idec);
if (!src) return NULL;
if (src == NULL) return NULL;
if (src->colorspace >= MODE_YUV) {
return NULL;
}
if (last_y) *last_y = idec->params_.last_y;
if (width) *width = src->width;
if (height) *height = src->height;
if (stride) *stride = src->u.RGBA.stride;
if (last_y != NULL) *last_y = idec->params_.last_y;
if (width != NULL) *width = src->width;
if (height != NULL) *height = src->height;
if (stride != NULL) *stride = src->u.RGBA.stride;
return src->u.RGBA.rgba;
}
uint8_t* WebPIDecGetYUV(const WebPIDecoder* idec, int* last_y,
uint8_t** u, uint8_t** v,
int* width, int* height, int *stride, int* uv_stride) {
uint8_t* WebPIDecGetYUVA(const WebPIDecoder* idec, int* last_y,
uint8_t** u, uint8_t** v, uint8_t** a,
int* width, int* height,
int* stride, int* uv_stride, int* a_stride) {
const WebPDecBuffer* const src = GetOutputBuffer(idec);
if (!src) return NULL;
if (src == NULL) return NULL;
if (src->colorspace < MODE_YUV) {
return NULL;
}
if (last_y) *last_y = idec->params_.last_y;
if (u) *u = src->u.YUVA.u;
if (v) *v = src->u.YUVA.v;
if (width) *width = src->width;
if (height) *height = src->height;
if (stride) *stride = src->u.YUVA.y_stride;
if (uv_stride) *uv_stride = src->u.YUVA.u_stride;
if (last_y != NULL) *last_y = idec->params_.last_y;
if (u != NULL) *u = src->u.YUVA.u;
if (v != NULL) *v = src->u.YUVA.v;
if (a != NULL) *a = src->u.YUVA.a;
if (width != NULL) *width = src->width;
if (height != NULL) *height = src->height;
if (stride != NULL) *stride = src->u.YUVA.y_stride;
if (uv_stride != NULL) *uv_stride = src->u.YUVA.u_stride;
if (a_stride != NULL) *a_stride = src->u.YUVA.a_stride;
return src->u.YUVA.y;
}