Add opj_codec_set_threads() in public API and propagate resulting thread pool to tcd level

By default, only the main thread is used. If opj_codec_set_threads() is not used,
but the OPJ_NUM_THREADS environment variable is set, its value will be
used to initialize the number of threads. The value can be either an integer
number, or "ALL_CPUS". If OPJ_NUM_THREADS is set and this function is called,
this function will override the behaviour of the environment variable.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/lib/openjp2/opj_codec.h b/src/lib/openjp2/opj_codec.h
index 6bd791fa..c88005d7 100644
--- a/src/lib/openjp2/opj_codec.h
+++ b/src/lib/openjp2/opj_codec.h
@@ -113,6 +113,7 @@ typedef struct opj_codec_private
             OPJ_BOOL (*opj_set_decoded_resolution_factor) ( void * p_codec,
                                                             OPJ_UINT32 res_factor,
                                                             opj_event_mgr_t * p_manager);
+
         } m_decompression;
 
         /**
@@ -157,6 +158,9 @@ typedef struct opj_codec_private
     void (*opj_dump_codec) (void * p_codec, OPJ_INT32 info_flag, FILE* output_stream);
     opj_codestream_info_v2_t* (*opj_get_codec_info)(void* p_codec);
     opj_codestream_index_t* (*opj_get_codec_index)(void* p_codec);
+
+    /** Set number of threads */
+    OPJ_BOOL (*opj_set_threads) ( void * p_codec, OPJ_UINT32 num_threads );
 }
 opj_codec_private_t;