libopenjpegenc: make dci compliant j2c

Signed-off-by: Michael Bradshaw <mjbshaw@gmail.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/libavcodec/libopenjpegenc.c b/libavcodec/libopenjpegenc.c
index 2bbbae9..c355083 100644
--- a/libavcodec/libopenjpegenc.c
+++ b/libavcodec/libopenjpegenc.c
@@ -188,6 +188,35 @@ static av_cold int libopenjpeg_encode_init(AVCodecContext *avctx)
     ctx->enc_params.tcp_numlayers = ctx->numlayers;
     ctx->enc_params.tcp_rates[0] = FFMAX(avctx->compression_level, 0) * 2;
 
+    if (ctx->cinema_mode > 0) {
+        ctx->enc_params.irreversible = 1;
+        ctx->enc_params.tcp_mct = 1;
+        ctx->enc_params.tile_size_on = 0;
+        /* no subsampling */
+        ctx->enc_params.cp_tdx=1;
+        ctx->enc_params.cp_tdy=1;
+        ctx->enc_params.subsampling_dx = 1;
+        ctx->enc_params.subsampling_dy = 1;
+        /* Tile and Image shall be at (0,0) */
+        ctx->enc_params.cp_tx0 = 0;
+        ctx->enc_params.cp_ty0 = 0;
+        ctx->enc_params.image_offset_x0 = 0;
+        ctx->enc_params.image_offset_y0 = 0;
+        /* Codeblock size= 32*32 */
+        ctx->enc_params.cblockw_init = 32;
+        ctx->enc_params.cblockh_init = 32;
+        ctx->enc_params.csty |= 0x01;
+        /* No ROI */
+        ctx->enc_params.roi_compno = -1;
+
+        if (ctx->enc_params.prog_order != CPRL) {
+            av_log(avctx, AV_LOG_ERROR, "prog_order forced to CPRL\n");
+            ctx->enc_params.prog_order = CPRL;
+        }
+        ctx->enc_params.tp_flag = 'C';
+        ctx->enc_params.tp_on = 1;
+    }
+
     ctx->compress = opj_create_compress(ctx->format);
     if (!ctx->compress) {
         av_log(avctx, AV_LOG_ERROR, "Error creating the compressor\n");