Commit Graph

56 Commits

Author SHA1 Message Date
Pascal Massimino
650ffa3bbb add version getters for decoder and encoder
WebPGetDecoderVersion() and WebPGetEncoderVersion()
will not return 0.1.2 encoded as 0x000102

dwebp and cwebp also have a new "-version" flag

Change-Id: I4fb4b5a8fc4e53681a386ff4b74fffb639fa237a
2011-03-24 16:17:10 -07:00
Pascal Massimino
8bf76fe0c8 add incremental decoding
The object WebPIDecoder is available to store the
decoding state. The flow is typically:

   WebPIDecoder* const idec = WebPINew(mode);
   while (has_more_data) {
     // ... (get additional data)
     status = WebPIAppend(idec, new_data, new_data_size);
     if (status != VP8_STATUS_SUSPENDED ||
       break;
     }

     // The above call decodes the current available buffer.
     // Part of the image can now be refreshed by calling to
     // WebPIDecGetRGB()/WebPIDecGetYUV() etc.
   }
   WebPIDelete(idec);

Doing so, one can try and decode new macroblocks everytime fresh
bytes are available.
There's two operating modes: either appending fresh bytes, or
updating the whole buffer with additional data in the end.
The latter requires less memcpy()'s

main patch by Somnath Banerjee (somnath at google.com)

Change-Id: Ie81cbd0b50f175743af06b1f964de838b9a10a4a
2011-03-23 18:33:26 -07:00
Pascal Massimino
746a4820b9 * make (*put)() hook return a bool for abort request.
* add an enum for VP8Status() to make things clearer

Change-Id: I458aeabab93f95d28e8ee10be699b677c04b4acb
2011-02-16 14:33:16 -08:00
Pascal Massimino
1dc4611a3a add support for PNG output (default)
regularize include guards

Change-Id: Ia1d0fa49c8c98e2c11f775b839d04a24e5450170
2011-01-31 22:25:44 -08:00
Pascal Massimino
6421a7a4fb move the decoder sourcetree to a sub-location src/dec
to make room for future libs sources

also extract the types declaration into its own types.h file

Change-Id: I8bae8a323a479a29375cf509792228ae6af51c7a
2011-01-06 08:57:14 -08:00
Pascal Massimino
c3f41cb47e Initial commit
Change-Id: I4712afb3912625e7aaccfa5160dcf78ee252f159
2010-09-30 09:55:07 -04:00