// Decoder functions
PyObject* _anim_decoder_new(PyObject* self, PyObject* args)
{
PyBytesObject *webp_string;
const uint8_t *webp;
Py_ssize_t size;
WebPData webp_src;
char* mode;
WebPDecoderConfig config;
WebPAnimDecoderObject* decp = NULL;
WebPAnimDecoder* dec = NULL;
if (!PyArg_ParseTuple(args, "S", &webp_string)) {
return NULL;
}
PyBytes_AsStringAndSize((PyObject *)webp_string, (char**)&webp, &size);
webp_src.bytes = webp;
webp_src.size = size;
// Sniff the mode, since the decoder API doesn't tell us
mode = "RGBA";
if (WebPGetFeatures(webp, size, &config.input) == VP8_STATUS_OK) {
if (!config.input.has_alpha) {
mode = "RGBX";
}
}
// Create the decoder (default mode is RGBA, if no options passed)
decp = PyObject_New(WebPAnimDecoderObject, &WebPAnimDecoder_Type);
if (decp) {
decp->mode = mode;
if (WebPDataCopy(&webp_src, &(decp->data))) {
dec = WebPAnimDecoderNew(&(decp->data), NULL);
if (dec) {
if (WebPAnimDecoderGetInfo(dec, &(decp->info))) {
decp->dec = dec;
return (PyObject*)decp;
}
}
}
PyObject_Del(decp);
}
PyErr_SetString(PyExc_RuntimeError, "could not create decoder object");
return NULL;
}
WebPMuxError ChunkAssignData(WebPChunk* chunk, const WebPData* const data,
int copy_data, uint32_t tag) {
// For internally allocated chunks, always copy data & make it owner of data.
if (tag == kChunks[IDX_VP8X].tag || tag == kChunks[IDX_ANIM].tag) {
copy_data = 1;
}
ChunkRelease(chunk);
if (data != NULL) {
if (copy_data) { // Copy data.
if (!WebPDataCopy(data, &chunk->data_)) return WEBP_MUX_MEMORY_ERROR;
chunk->owner_ = 1; // Chunk is owner of data.
} else { // Don't copy data.
chunk->data_ = *data;
}
}
chunk->tag_ = tag;
return WEBP_MUX_OK;
}
