diff options
Diffstat (limited to 'third_party/libwebp/dec/webp.c')
| -rw-r--r-- | third_party/libwebp/dec/webp.c | 40 |
1 files changed, 21 insertions, 19 deletions
diff --git a/third_party/libwebp/dec/webp.c b/third_party/libwebp/dec/webp.c index e4fe73d..302220f 100644 --- a/third_party/libwebp/dec/webp.c +++ b/third_party/libwebp/dec/webp.c @@ -18,10 +18,6 @@ #include "./webpi.h" #include "../webp/mux_types.h" // ALPHA_FLAG -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - //------------------------------------------------------------------------------ // RIFF layout is: // Offset tag @@ -285,6 +281,7 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, int* const height, int* const has_alpha, int* const has_animation, + int* const format, WebPHeaderStructure* const headers) { int canvas_width = 0; int canvas_height = 0; @@ -292,6 +289,9 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, int image_height = 0; int found_riff = 0; int found_vp8x = 0; + int animation_present = 0; + int fragments_present = 0; + VP8StatusCode status; WebPHeaderStructure hdrs; @@ -312,13 +312,13 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, // Skip over VP8X. { uint32_t flags = 0; - int animation_present; status = ParseVP8X(&data, &data_size, &found_vp8x, &canvas_width, &canvas_height, &flags); if (status != VP8_STATUS_OK) { return status; // Wrong VP8X / insufficient data. } animation_present = !!(flags & ANIMATION_FLAG); + fragments_present = !!(flags & FRAGMENTS_FLAG); if (!found_riff && found_vp8x) { // Note: This restriction may be removed in the future, if it becomes // necessary to send VP8X chunk to the decoder. @@ -326,8 +326,10 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, } if (has_alpha != NULL) *has_alpha = !!(flags & ALPHA_FLAG); if (has_animation != NULL) *has_animation = animation_present; + if (format != NULL) *format = 0; // default = undefined - if (found_vp8x && animation_present && headers == NULL) { + if (found_vp8x && (animation_present || fragments_present) && + headers == NULL) { if (width != NULL) *width = canvas_width; if (height != NULL) *height = canvas_height; return VP8_STATUS_OK; // Just return features from VP8X header. @@ -356,6 +358,10 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, return VP8_STATUS_BITSTREAM_ERROR; } + if (format != NULL && !(animation_present || fragments_present)) { + *format = hdrs.is_lossless ? 2 : 1; + } + if (!hdrs.is_lossless) { if (data_size < VP8_FRAME_HEADER_SIZE) { return VP8_STATUS_NOT_ENOUGH_DATA; @@ -374,7 +380,7 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, return VP8_STATUS_BITSTREAM_ERROR; } } - // Validates image size coherency. TODO(urvang): what about FRGM? + // Validates image size coherency. if (found_vp8x) { if (canvas_width != image_width || canvas_height != image_height) { return VP8_STATUS_BITSTREAM_ERROR; @@ -402,7 +408,8 @@ VP8StatusCode WebPParseHeaders(WebPHeaderStructure* const headers) { assert(headers != NULL); // fill out headers, ignore width/height/has_alpha. status = ParseHeadersInternal(headers->data, headers->data_size, - NULL, NULL, NULL, &has_animation, headers); + NULL, NULL, NULL, &has_animation, + NULL, headers); if (status == VP8_STATUS_OK || status == VP8_STATUS_NOT_ENOUGH_DATA) { // TODO(jzern): full support of animation frames will require API additions. if (has_animation) { @@ -416,7 +423,7 @@ VP8StatusCode WebPParseHeaders(WebPHeaderStructure* const headers) { // WebPDecParams void WebPResetDecParams(WebPDecParams* const params) { - if (params) { + if (params != NULL) { memset(params, 0, sizeof(*params)); } } @@ -449,11 +456,6 @@ static VP8StatusCode DecodeInto(const uint8_t* const data, size_t data_size, if (dec == NULL) { return VP8_STATUS_OUT_OF_MEMORY; } -#ifdef WEBP_USE_THREAD - dec->use_threads_ = params->options && (params->options->use_threads > 0); -#else - dec->use_threads_ = 0; -#endif dec->alpha_data_ = headers.alpha_data; dec->alpha_data_size_ = headers.alpha_data_size; @@ -465,6 +467,10 @@ static VP8StatusCode DecodeInto(const uint8_t* const data, size_t data_size, status = WebPAllocateDecBuffer(io.width, io.height, params->options, params->output); if (status == VP8_STATUS_OK) { // Decode + // This change must be done before calling VP8Decode() + dec->mt_method_ = VP8GetThreadMethod(params->options, &headers, + io.width, io.height); + VP8InitDithering(params->options, dec); if (!VP8Decode(dec, &io)) { status = dec->status_; } @@ -651,7 +657,6 @@ uint8_t* WebPDecodeYUV(const uint8_t* data, size_t data_size, static void DefaultFeatures(WebPBitstreamFeatures* const features) { assert(features != NULL); memset(features, 0, sizeof(*features)); - features->bitstream_version = 0; } static VP8StatusCode GetFeatures(const uint8_t* const data, size_t data_size, @@ -665,7 +670,7 @@ static VP8StatusCode GetFeatures(const uint8_t* const data, size_t data_size, return ParseHeadersInternal(data, data_size, &features->width, &features->height, &features->has_alpha, &features->has_animation, - NULL); + &features->format, NULL); } //------------------------------------------------------------------------------ @@ -803,6 +808,3 @@ int WebPIoInitFromOptions(const WebPDecoderOptions* const options, //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif |