257     int alpha_bits;  member
523     const int abits = ctx->alpha_bits;  in encode_alpha_plane()
627                            ctx->blocks[0], mbs_per_slice, ctx->alpha_bits);  in encode_slice()
767     const int abits = ctx->alpha_bits;  in estimate_alpha_plane()
824     int alpha_bits = 0;  in find_slice_quant()  local
861                            td->blocks[i], mbs_per_slice, ctx->alpha_bits);  in find_slice_quant()
870     if (ctx->alpha_bits)  in find_slice_quant()
871         alpha_bits = estimate_alpha_plane(ctx, src, linesize[3],  in find_slice_quant()
875         bits  = alpha_bits;  in find_slice_quant()
882         for (i = 1; i < ctx->num_planes - !!ctx->alpha_bits; i++) { /* estimate chroma plane */  in find_slice_quant()
901             bits  = alpha_bits;  in find_slice_quant()
919             for (i = 1; i < ctx->num_planes - !!ctx->alpha_bits; i++) { /* estimate chroma plane */  in find_slice_quant()
1043     bytestream_put_byte  (&buf, 0x40 | (ctx->alpha_bits >> 3));  in encode_frame()
1231             ctx->alpha_bits = 0;  in encode_init()
1233         if (ctx->alpha_bits & 7) {  in encode_init()
1239         ctx->alpha_bits = 0;  in encode_init()
1246     ctx->num_planes    = 3 + !!ctx->alpha_bits;  in encode_init()
1281             if (ctx->alpha_bits)  in encode_init()
1350     if (ctx->alpha_bits) {  in encode_init()
1355          /* bits per pixel */            (1 + ctx->alpha_bits + 1) + 7 >> 3);  in encode_init()
1411     { "alpha_bits", "bits for alpha plane", OFFSET(alpha_bits), AV_OPT_TYPE_INT,